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Test paper, a type of paper product chemically treated to produce color changes in response to specific substances, serves as a valuable tool for rapid detection and analysis. This experiment, based on the surface modification of glass fiber filter paper, introduces a heavy metal ion detection test paper designed with the fluorescence sensing characteristics of rare earth complexes. The test paper demonstrates its effectiveness and convenience in detecting heavy metal ions in water sources. The innovative test paper proves highly useful in addressing heavy metal ion contamination in water, emphasizing the significant role of chemistry in advancing ecological civilization. The simplified, safe, and environmentally friendly process of creating the test paper yields a practical and user-friendly product. This experiment not only educates on the general production and testing principles of test papers but also sparks students' interest in scientific exploration and application. The experiment, characterized by its simplicity, repeatability, low entry barrier, environmental friendliness, and safety, possesses a unique color aesthetic, leaving a lasting impression. It is suitable for conducting popular science experiments in public places and promoting awareness in experimental teaching across various educational levels. [ABSTRACT FROM AUTHOR]

Course assessment plays a crucial role in improving teaching quality and evaluating the quality of talent development in higher education institutions. However, Hanjiang Normal University, a local institution, faces challenges such as a singular assessment approach, low student engagement, and insufficient innovation in its elective courses. This paper explores the reform of the assessment model for elective courses, taking the example of the surfactant chemistry course. By adopting a three-dimensional approach involving teacher evaluation, peer-to-peer assessment, and individual contribution, and with the core concept of scientific success, the paper introduces and implements the "TGI" assessment model (Teacher Evaluation, Group-Group Mutual Evaluation, and Individual Contribution Ratio). This model breaks away from traditional assessment methods, enhancing student engagement and initiative, stimulating creativity, activating innovative thinking, and fostering comprehensive student capabilities. The "TGI" assessment model holds significant implications for improving course teaching quality and serves as a valuable reference for the evaluation of other elective courses. [ABSTRACT FROM AUTHOR]

"Quantitative Analytical Chemistry" is a compulsory foundational course for students in relevant majors at agricultural and forestry universities. It is offered in various fields such as agriculture, forestry, animal science, biology, food science, environmental science, and biology. Under the background of the construction of "new agricultural science", this paper addresses several pain points in the teaching process, including the misalignment of limited teaching hours with extensive course content, lack of integration between the course's subject matter and the concept of "New Agricultural Sciences", disconnection between teaching content and ideological and political education, monotony in teaching modes and evaluation methods, and scarcity of teaching resources. The paper proposes solutions and suggestions in terms of teaching content, teaching design, teaching modes, teaching resources, ideological and political education, and evaluation methods, aiming to provide a reference for the reform of the "Quantitative Analytical Chemistry" course. [ABSTRACT FROM AUTHOR]

In analytical chemistry, performance evaluation parameters for quantitative analysis methods include the spiked recovery, relative standard deviation, calibration curve and its correlation coefficient, linear range, error bar, limit of detection, sensitivity, selectivity, stability, etc. A deep understanding and proficient application of the above parameters are fundamental competencies for professionals in analytical chemistry. However, less than half of the students possess an adequate grasp of these common evaluation parameters, and could not distinguish parameters with similar meanings from the questionnaire survey for most senior undergraduates and postgraduate students. This deficiency is attributed to existing textbooks that merely introduce basic concepts of these parameters without illustrating their practical applications. Additionally, no comprehensive literature has systematically presented examples of how to apply these parameters. This paper carefully selects multiple cutting-edge articles from the highly-cited journal Analytical Chemistry, to vividly and thoroughly explain the standard applications of each evaluation parameters, replacing the previous one-dimensional theoretical descriptions. The goal of this work is to guide students in gaining a deep, intuitive understanding of how to effectively evaluate analytical methods and results based on these parameters, and to enable proficient and accurate expression in future scientific research. This paper aims to serve as a reference for improving the scientific and practical aspects of teaching evaluation parameters. [ABSTRACT FROM AUTHOR]

Experiential education is widely recognized as an effective teaching method for nurturing students’ problem-solving abilities and fostering innovative thinking through hands-on activities. Furthermore, the field of 3D printing of alloy materials has garnered significant attention in the realm of electrocatalysis. This paper aims to synergize experimental education with 3D printing of alloys, exploring its impact on students and educational outcomes. Initially, the paper introduces the importance and role of experimental education and the characteristics and potential applications of alloy materials. Subsequently, the potential utilization of 3D printing technology in the fabrication of alloys is discussed. To enhance students’ engagement, learning motivation, and scientific literacy, they actively participate in designing and conducting experiments. The primary objective of this research is to provide novel ideas and methodologies for educational practices, cultivating students’ scientific thinking and practical abilities. Additionally, it aims to foster a greater number of innovative talents in the field of materials science and engineering. [ABSTRACT FROM AUTHOR]

Taking the organic chemistry experiment “Synthesis of Aspirin” as an example, this paper discusses the specific implementation measures of integrating ideological and political education into the organic chemistry laboratory course through five steps: determining ideological and political teaching objectives, mining ideological and political elements, selecting ideological and political carriers, conducting ideological and political practice activities, and conducting ideological and political evaluation. Adopting a progressive teaching model, this paper proposes several suggestions and measures for the effective implementation of ideological and political education in laboratory courses. [ABSTRACT FROM AUTHOR]

Formylstyrylpyridinium salt (SBQ) is a water-soluble fluorescent diarylethene derivative. In aqueous solution, it undergoes a [2+2] photodimerization reaction under 365 nm ultraviolet light irradiation, yielding nonfluorescent photodimers. Upon exposure to 254 nm short-wavelength ultraviolet light, these photodimers can undergo photolysis of the cyclobutene ring, regenerating SBQ monomers and restoring fluorescence, making them suitable for optical information storage. In acidic aqueous solution, SBQ monomers can be grafted onto the polyvinyl alcohol skeleton through acetalization reaction, synthesizing a water-soluble photosensitive polymer material. When mixed with polyvinyl acetate emulsion, it forms a one-component silk screen printing photosensitive emulsion. Students can utilize the synthesized product to print patterns on paper and experimental clothing, as well as to fabricate printed circuit boards and explore additional applications. All synthetic reactions in this experiment are conducted in aqueous solution, offering safety, environmental friendliness, and adherence to green chemistry principles. [ABSTRACT FROM AUTHOR]

In the physical chemistry experiment "Colloid ζ potential measurement by electrophoresis", there exist some issues affecting the effectiveness of experimental teaching, such as prolonged colloid purification time and low accuracy in interface position measurement. To address these challenges, this paper explores methods and conditions for the rapid, large-scale, and repeatable purification of Fe(OH)3 colloids using acid and alkali ion exchange resins. Additionally, an innovative device utilizing a digital scale and a light barrier for precise measurement of colloidal interface position has been designed. This device is integrated with the electrophoresis tube holder, forming a dedicated set of instrumentation. The increased accuracy in interface position measurement allows for a reduction in electrophoresis measurement time to 5 minutes, mitigating the impact of potential gradient changes caused by prolonged electrophoresis. The application of these improved methods and instruments in experimental teaching has resulted in enhanced efficiency, reduced measurement result deviation, and improved repeatability. This lays the groundwork for incorporating some exploratory experiments into the teaching program. [ABSTRACT FROM AUTHOR]

As a classical physical chemistry experiment, traditional Fe(OH)3 colloid electrophoresis has suffered from the following shortcomings, such as the waste of Fe(OH)3 colloid, the long dialysis operation time, and the lack of inquiry learning. To overcome such shortcomings, we have made the following improvements on the original experiment: 1) realizing the recycling of Fe(OH)3 colloid by regenerating Fe(OH)3 colloid waste via colloid redissolution route; 2) improving the purification efficiency of coarse Fe(OH)3 colloid through optimizing the dialysis procedure; 3) introducing AgI colloid exploratory investigation to enhance the innovation and interestingness of this experiment; 4) introducing paper electrophoresis to cultivate the ability to connect fundamental experiments with practical applications. The above improvements have been fully confirmed and already applied in the colloid electrophoresis experiment performed in our university. As expected, such improvements have aroused enthusiastic responses from the students attended this course, thus providing a valuable reference for us to improve other classical experiments. [ABSTRACT FROM AUTHOR]

The preparation of nano zinc oxide is a classic inorganic chemistry experiment with distinctive characteristics. In this paper, an innovative improvement is made to solve the existing problems in the experimental process of basic chemistry experiment "preparation of nano zinc oxide powder". The preparation and photocatalytic activity of zinc oxide nanoparticles based on the microemulsion method were designed. This experiment features a mild reaction, simple operation, obvious phenomenon, and environmental friendliness. It can not only cultivate students' basic operation skills but also stimulate students' interest in experiments, and exercise students' comprehensive ability. Compared to the traditional experiment for the preparation of nano zinc oxide, this approach has higher time efficiency and a scientifically reasonable experimental arrangement. The phenomena are more apparent, and it is more interesting. It is comprehensive and exploratory, as it not only consolidates students' basic experimental skills but also nurtures their scientific research thinking and expands their research skills. [ABSTRACT FROM AUTHOR]

Intelligent actuators have garnered significant attention for their applications in diverse fields such as soft robotics, artificial muscles, sensors, and intelligent skins. In this innovative experiment, we successfully synthesized a superhydrophobic actuation material by employing a layer-by-layer assembly approach, incorporating polyimide film (PI), polydimethylsiloxane (PDMS), and graphene. This material exhibits responsive behaviors to stimuli including light, electricity, and heat. Drawing inspiration from traditional Chinese paper-cutting techniques, we fashioned claw-shaped structures and deformable water collection devices, enabling intelligent programming even in challenging environments such as strong acids and alkalis. Serving as an effective educational tool, this experiment facilitates students' understanding of fundamental scientific principles across multiple disciplines, spanning inorganic and polymer chemistry, instrumental analysis, and materials science, while emphasizing the seamless integration of theory and application. The selection of raw materials, which are non-toxic, cost-effective, and eco-friendly, aligns with the principles of green chemistry, underscoring the experiment's sustainability. Notably, the experimental phenomenon is readily observable, and the operation process is engaging, fostering students' enthusiasm for scientific research and innovation. This experiment offers a stimulating and enriching learning experience, nurturing students' curiosity, and proficiency in scientific inquiry. [ABSTRACT FROM AUTHOR]

The issue of oil-water separation in the treatment of produced water by ternary composite flooding (ASPPW) has emerged as a technical bottleneck in the widespread adoption of ternary composite flooding technology. This paper introduces a method that utilizes ultrasonic-enhanced polymeric aluminum chloride (PAC) for the synergistic treatment of ASP-PW, significantly improving the efficiency of oil-water separation. Experimental findings reveal that, at an ultrasound frequency of 40 kHz and a duration of 60 min, the particle size of emulsified oil droplets increased from 349 nm to 3639 nm, indicating the consolidating effect of ultrasound on emulsified oil droplets. When ultrasonic and PAC are employed in tandem to process ASP-PW, with ultrasound duration at 60 min, dosage at 850 mg∙L-1, and a settling time of 30 min in a 40 °C water bath, the oil removal rate reached 95.82%. This rate surpasses the individual oil removal rates of ultrasound alone (86.12%) and PAC (90.87%) under the same conditions, demonstrating a significant synergistic effect. The experiment's practical content is a crucial manifestation of science and education integration. Following the principles of green and sustainable development, the experimental process enhances students' ability for independent exploration. This experiment, spanning from problem investigation and program design to result acquisition, underscores the pivotal role of teamwork. Additionally, it opens up new possibilities for the processing of ASP-PW. [ABSTRACT FROM AUTHOR]

In this paper, the experimental design of undergraduate teaching was conducted based on the hot research fields of molecular switches and aggregation-induced luminescence. Photochromic diarylethene was skillfully integrated into a tetraarylethene system with aggregation-induced luminescence performance, and a new type of photoswitchable fluorescent molecular switch with both color-changing and luminescence functions was prepared. By integrating science and education, the scientific research frontier was introduced into undergraduate experimental teaching. A comprehensive experimental exploration was carried out from the aspects of material preparation, separation and purification, structure characterization and performance test. The molecular design of this experiment is concise and novel, the content is rich, and the phenomenon is obvious. On the basis of comprehensively applying and consolidating the basic theories and basic operations of undergraduate learning, this work can stimulate students' interest in scientific research and cultivate the scientific spirit of unity and cooperation, breakthrough and innovation. [ABSTRACT FROM AUTHOR]

Acid-base equilibrium is a crucial topic in chemical education. However, current teaching practices only focus on describing acid-base dissociation and pH buffering in homogeneous solutions, without considering the influence of gas-phase components on acid-base dissociation and pH buffering in multiphase systems. To address this issue, this paper takes a typical aerosol multiphase system as an example and examines the impact of component volatility and hygroscopicity on the acid-base equilibrium in multiphase systems through the analysis of multiphase buffering theory and the effective dissociation constant pKa*. By doing so, it aims to stimulate students' thinking and provide a new paradigm for teaching acid-base equilibrium in multiphase systems. [ABSTRACT FROM AUTHOR]

This paper presents a chemical biology experiment designed to exploit the principle of covalent binding between fluorescein isothiocyanate and protein amines. This process is aimed at achieving non-site-specific fluorescent labeling of both extracellular proteins, exemplified by bovine serum albumin, and intracellular proteins, using Escherichia coli total protein as a case study. Gel filtration chromatography is employed as a subsequent purification method, with comprehensive characterization of the labeling results performed using UV-Visible spectrophotometry, flow cytometry, and fluorescence microscopy. This experiment encompasses a range of foundational and cutting-edge laboratory skills. It is closely aligned with the commonly employed antibody fluorescence labeling techniques in scientific research, presenting a moderate level of complexity. Participation in this experiment allows students to gain a profound understanding of fundamental concepts in chemical biology, enhance their comprehensive practical skills, broaden their research perspectives and nurture scientific thinking. [ABSTRACT FROM AUTHOR]

This paper, taking the preparation and composition analysis of tetraammine copper(II) as an example, explores teaching reforms by incorporating independent design experiments to enhance students' autonomous learning and cultivate their experimental design thinking. Independent design experiments require students to independently consult literature, design experimental plans, analyze the feasibility of the plans, and engage in comprehensive discussions and analyses after experimental exploration. This approach further nurtures students' abilities for independent thinking and synthesis, fostering skills in literature review and experimental plan writing, thereby laying a solid foundation for future scientific research. [ABSTRACT FROM AUTHOR]

In complexometric titration, ethylenediaminetetraacetic acid (EDTA), commonly referred to as Y, is the titrant of choice. This system often encompasses various side reactions. This paper derives a formula at the stoichiometric point, based on the side reaction coefficient (α), for calculating the concentration of NY or ML coordination compounds with a coordination ratio of 1: 1, where NY represents the complex of ligand Y with coexisting metal ions (Nn+), and ML denotes the complex of the target metal ions (Mn+) with other ligands (L). The formulation significantly streamlines the computation of these complex concentrations. [ABSTRACT FROM AUTHOR]

In order to comprehensively promote the integration of ideology and politics into the curriculum, it is essential to implement teaching reforms. This paper proposes several measures to advance the ideological and political construction in the analytical chemistry curriculum, based on the characteristics of the discipline and the objectives of the course. These measures include enhancing teachers' capacity for ideological education, establishing a framework for integrating ideology and politics into the curriculum, exploring the ideological elements within the analytical chemistry course, and optimizing teaching evaluations. By integrating ideological education with professional knowledge, students can not only acquire theoretical knowledge and practical skills in analytical chemistry but also cultivate a patriotic spirit centered around core values such as reform, innovation, and scientific development. This approach aims to foster a comprehensive understanding of dialectical materialism, instill a rigorous and pragmatic scientific attitude, and promote a consensus on the significance of ideological and political education within the curriculum. Ultimately, these efforts seek to achieve a harmonious integration of teaching and moral education, facilitating the development of students' character and values. [ABSTRACT FROM AUTHOR]

Solubility of inorganic substances is one of the difficulties in teaching and learning elemental chemistry. This article selects representative examples and provides a fundamental understanding of the solubility of inorganic substances by means of analyzing, comparing, and summarizing its influencing factors. And thus a cognitive model is constructed to facilitate learners' understanding. Based on the knowledge carrier of "the solubility of inorganic substances", this paper explores the application of the "knowledge construction" learning mode in elemental chemistry teaching. [ABSTRACT FROM AUTHOR]

Scientific instruments play a crucial role in both scientific research and experimental teaching, driving technological innovation. This paper presents an optimized experiment on the extraction, isolation and identification of artemisinin, designed as a seamless undergraduate-to-master's level experimental project. The process incorporates the use of modern instrument principles to extract active compounds from Artemisia annua, measure the content of artemisinin, purify it, and analyze its structure. It provides students with hands-on experience in advanced experimental techniques related to natural products, fosters their innovation and scientific research ability. [ABSTRACT FROM AUTHOR]

Organic chemistry is a fundamental course for undergraduate students majoring in clinical disciplines at our university, playing a crucial "bridge" role in their subsequent professional courses. However, organic chemistry is known for its abstract theoretical concepts and numerous knowledge points, making it challenging for students to comprehend and master. In response to the teaching issues encountered in traditional classroom settings, this paper adopts the innovative O-PIRTAS flipped classroom model, integrating the characteristics of organic chemistry education. Taking the specific topic of carboxylic acids as an example, the classroom teaching is restructured with the aim of exploring the application of this model in organic chemistry courses and subsequently improving teaching effectiveness. [ABSTRACT FROM AUTHOR]

General Chemistry, a foundational course for engineering students in Sino-foreign cooperative education programs, incorporates classic international textbooks to enhance its teaching quality. This approach, however, encounters challenges such as the influence of foreign culture and a potential erosion of cultural self-confidence during the teaching process. To counter this, the course emphasizes ideological and political education to deepen students' appreciation and understanding of their own culture. This paper details how the ideological and political development of the General Chemistry course is grounded in the principle of culture confidence. It actively integrates Chinese ideological and political elements while thoughtfully combining them with international perspectives throughout the teaching process. This integration not only enriches the course's content, but also fosters an effective ideological and political education environment, leading to significant educational outcomes. [ABSTRACT FROM AUTHOR]

The Analytical Chemistry course focuses on quantitative analysis, emphasizing the integration of theory and practice, and the unity of knowledge and practice. To cultivate students' innovative and logical thinking skills, this paper uses the "application of acid-base titration method" as a case study. Starting from microscopic knowledge content, it constructs the logical relationships within the theoretical system. Based on this, the teaching design is developed, focusing on clarifying the knowledge framework, deeply considering logical relationships, and reconstructing course resources. Through a project-based case teaching method, the initiative and innovation of students are stimulated, enhancing the effectiveness of teaching. [ABSTRACT FROM AUTHOR]

The development of polymer chemistry experiment teaching for non-polymer major students of chemistry has been relatively slow, and it is urgent to keep up with the frontier of scientific research in the field and introduce advanced and practical contents. This paper summarizes our reform experience in experiment teaching over the past decade, using the preparation, solution property, optical performance, and application of thermo-sensitive polymers as an example. We demonstrate how to innovate the content of experiment teaching, experimental technology, and teaching methods, through which we design a series of polymer chemistry experiments that meet the training needs of science talents, conform to the times and scientific development, and are loved and valued by students. This approach effectively solves the contradiction between training needs and course load, allowing for the integration of these newly designed experiments into the teaching system of non-polymer major undergraduate students of chemistry, without the need for new courses, despite the limited class hours. This approach proves to be feasible and helpful in stimulating students' interest in the field, and enhancing their ability for inquiry and innovation. [ABSTRACT FROM AUTHOR]

This paper focuses on the improvement and expansion of the experiment "Determination of the Rate Constant of Ethyl Acetate Saponification Reaction" in existing Physical Chemistry Experiment textbooks. Firstly, the saponification reaction vessel is replaced with a jacket beaker to ensure the uniform concentration and constant temperature of the solution during the experiment through constant temperature water circulation and magnetic stirring. Secondly, a certain volume of 0.01 mol·L-1 sodium hydroxide solution is taken and the conductivity value is measured after reaching a constant temperature, denoted as κ0. Then, an equal molar amount of ethyl acetate is added to the reactor using a micro sampler while simultaneously recording the conductivity values at different times, denoted as κt. Thirdly, the influence of electrode constant is eliminated through data normalization, providing clear physical quantities and intuitive experimental phenomena. The improved experimental procedure reduces steps and improves the accuracy of data measurement, allowing for the measurement of the rate constant of rapid saponification reactions under high temperature conditions. Within limited class time, students can obtain the apparent activation energy and pre-exponential factor through division of labor, collaboration, and data sharing. [ABSTRACT FROM AUTHOR]

In this paper, we designed a protein immunoassay using microfluidic technology to quantitatively detect procalcitonin (PCT). The experiment involved various steps such as solution preparation, microfluidic chip assembly, standard curve drawing, testing of unknown liquid samples, and other experimental processes. By conducting these experiments, students can gain a deeper understanding of the emerging scientific research field of microfluidics. Furthermore, this training helps to foster their scientific thinking, ability to innovate, and integrate knowledge. [ABSTRACT FROM AUTHOR]

This paper describes some of the problems in the teaching of organic chemistry laboratory, and introduces the exploration and practice of improving the teaching quality. In the decades, we have continuously innovated the teaching methods of organic chemistry laboratory from the aspects of strengthening students' preview, strengthening teachers' skill training, emphasizing the collective lesson preparation, strengthening the teachers' guidance of the experimental process, and strengthening the evaluation and reflection after class. [ABSTRACT FROM AUTHOR]

To strengthen the management of laboratory safety, a comprehensive system for undergraduate chemistry laboratory safety is constructed from three aspects: the establishment of safety regulations and rules, safety training for laboratory experiments, and optimization of experiment teaching content, as well as safety emergency training. In terms of improving experiment content, this paper focuses on introducing methods such as designing green chemistry experiments, ensuring the safety of classic experiments, and virtualizing high-risk experiments. By integrating safety management throughout the entire teaching process, not only can students' safety awareness be effectively cultivated, but also their overall quality can be enhanced. [ABSTRACT FROM AUTHOR]

The extracurricular innovation laboratories serve vital expansion and valuable complement to the traditional teaching laboratory and play a crucial role in developing students' innovative abilities. Given the variety of experiments conducted, the open management of these laboratories presents significant challenges. This paper examines the issues faced by chemical extracurricular innovation laboratories which are opening to undergraduate students and explores corresponding management approaches involving the enhancement of institutional safeguards, the clarification of safety responsibilities, the optimization of resource allocation and opening up of new management models from managerial perspective. These efforts aim to provide robust support for the cultivation of innovative talents. [ABSTRACT FROM AUTHOR]

In addition to their primary responsibilities in teaching support, technicians at the National Demonstration Center for Experimental Chemistry Education (Peking University) have been actively encouraged to engage in various endeavors that align with their professional expertise and personal interests. This paper aims to highlight specific approaches that have been implemented in recent years to enhance the technicians' overall competence and foster their individualized growth. These approaches include engaging in teaching practices and reforms, advancing instrument development and enhancement, contributing to laboratory construction initiatives, as well as participating in social service activities. [ABSTRACT FROM AUTHOR]

Large-scale instruments play a crucial role in talent cultivation and research testing services in universities. A systematic training system is the fundamental guarantee for the efficient operation of the university's large-scale instrument sharing platform, as well as an objective requirement for promoting first-class education and cultivating top talents. A systematic and standardized online training model is beneficial in enhancing the effectiveness of the training. This paper explores the construction of a network resource platform that integrates safety training and assessment, instrument usage training and assessment, instrument principles and application techniques, and interactive communication of instrument test results and cutting-edge displays. It also explores the development of a training management system and a comprehensive learning support system based on this platform, providing new insights for the construction of a large-scale instrument sharing and talent cultivation system in universities. [ABSTRACT FROM AUTHOR]

Buffer capacity is an important concept in analytical chemistry. Conventional calculations often neglect volume changes that occurs when a buffer solution mixes with a sample solution, yielding what is termed "static" buffer capacity. In practical applications, however, the volume of the buffer solution mixed with the sample solution is often substantially greater than the original volume of the buffer solution, therefore necessitating the consideration of "dynamic" buffer capacity in textbook. This paper proposes a "de-formulized" strategy for addressing "dynamic" buffer capacity problem, which is completely based on the underlying logic of the discipline. This approach avoids adding to the memorization burden of students' learning. [ABSTRACT FROM AUTHOR]

This paper summarizes the strategies of functional group addition that often appear in basic organic courses. We innovatively propose the carbonyl-oriented functional group addition of amine to synthesize different types of amines. We expect to enable students to have a more systematic and in-depth understanding of functional group addition and to build a bridge between basic course learning and practical scientific research. [ABSTRACT FROM AUTHOR]

Curriculum ideological and political is the soul of Physical Chemistry education. Taking the course of Physical Chemistry of Yunnan Agricultural University as an example, this paper proposes a "seven-step teaching characteristic method" according to the educational concept of "virtue and material, unity of knowledge and action". The teaching mode of "One central task, One critical line, Two drives, Three integrations" in physical chemistry course under the guidance of ideological and political education is interpreted from the four dimensions of teaching objectives, teaching content, theory and practice. Teaching practice shows that the teaching of physical chemistry guided by curriculum ideology and politics is very effective way to follow the needs of the times, innovated teaching content, improve students' ability and teaching quality, cultivated students' good moral character. [ABSTRACT FROM AUTHOR]

Cyclic organic compounds play a crucial role in organic chemistry, pharmaceutical chemistry, and materials science. Among the various methods for constructing these compounds, metal-catalyzed cycloaddition and cyclization reactions stand out as powerful approaches. In recent years, scientists have made significant advancements by developing bimetallic relay catalytic systems based on the study of single-transition-metal catalytic cyclization reactions. These bimetallic relay catalytic systems have garnered immense attention due to their ability to facilitate transformations that are unattainable through individual catalytic systems alone. This paper provides a comprehensive review of the recent progress made in the synthesis of cyclic compounds through bimetallic relay catalysis over the past five years, while also offering insights into the future directions of this exciting field. [ABSTRACT FROM AUTHOR]

Analytical Chemistry course is a core professional course for chemistry majors and other related majors. Achieving the objectives of this course is crucial for the cultivation of professional talent. Effective implementation of teaching reform and design plays a significant role in enhancing the achievement of curriculum objectives. This paper aims to deepen the curriculum reform based on current implementation issues, and establish a triadic-driven curriculum reform and design model. This model integrates a learning community involving both teachers and students, promotes a seamless online and offline integration, emphasizes curriculum-based ideological and political education, pursues excellence in curriculum elements of profoundness-innovation-challenging, and continuously integrates Outcome-Based Education (OBE) philosophy. Thus, a curriculum reform model known as "unified body, dual-line integration, and triadic drive" has been constructed. [ABSTRACT FROM AUTHOR]

This paper explores the use of the Python language and scientific computing libraries to visualize the wave functions and electron clouds of common hydrogen atomic s and p orbitals in structural chemistry. Multiple scripts have been developed in this process, employing data processing and various generation algorithms to achieve the visualization of wave functions and electron clouds. The aim is to guide students in a comprehensive study and understanding of the physical significance of wave functions and electron clouds. This approach enhances students' abilities for independent thinking and active learning. [ABSTRACT FROM AUTHOR]

Being the professional visual software for the refinement of small molecular crystal structure, ShelXle has a large number of users among college groups. Due to the lack of literature reports on the using and research of ShelXle at home and abroad nowadays, many teachers and students were puzzled on how to deal with the problems encountered in the process of refinement using ShelXle. In this paper, the development backgrounds, the basic and special functions and the using method of ShelXle are presented in detail. Combined with several cases and compared with other visual software, its technical superiorities in the refinement of small molecular crystal structures were analyzed, and some suggestions about enhancing its refinement effect were also illustrated. [ABSTRACT FROM AUTHOR]

This paper provides a concise overview of three commonly employed methods for the determination of crystal structures from powder diffraction data, each exemplified with a specific case study. The first method is the single-crystal-like direct methods, leveraging reciprocal space information to construct the structure model. The second approach involves simulated annealing, which performs a global optimization of randomly generated models in real space to identify the structure. The third is the charge flipping method in which modifications to structure factors in reciprocal space and charge densities in real space are made, leading to the determination of the structure model through Fourier cycling switching back and forth between the two spaces. The presented examples are Ba3BPO7, MgSO4.2H2O and MgSO4.2.5H2O, respectively. [ABSTRACT FROM AUTHOR]

Macrocyclic receptors have served as the principal tools of supramolecular chemistry because of their innate molecular recognition and complexation capabilities. They have also increased research interest in modern supramolecular chemistry because of their practical applications. Leaning towerarenes, a new family of synthetic macrocycles, have various applications in crystal engineering and other related fields owing to their excellent solubility and crystallization, flexible backbone, and superior host-guest properties. In this paper, we summarize the applications of leaning towerarenes from the perspective of crystal engineering. Particular attention is paid to the correlation between their structural features and supramolecular functions. We hope this will stimulate students' interest in crystal chemistry and beyond. [ABSTRACT FROM AUTHOR]

A comprehensive 8-hour chemical experiment was devised around the single crystal-to-single crystal (SCSC) transformation, an emerging method in solid-phase inorganic synthesis. By employing a direct additive process technology, the green complexes (H3O)[K(15C5)2][CuCl4] (1) were synthesized in both powder and macrosingle crystal forms. Upon temperature induction, complex 1 transitions to the red complex [K(15C5)2][CuCl3] (2), a shift attributed to the restricted dimerization of [CuCl3]- resulting from steric repulsion effects in the solid phase. Notably, complex 2 can revert back to complex 1 when exposed to hydrochloric steam through an SCSC transformation. This SCSC transformation between complexes 1 and 2 is vividly demonstrated on filter paper, showcasing dynamic color changes, either as texts or drawings. This rapid and visually engaging process is poised to spark students' curiosity. Furthermore, learners can bridge theory with practice, recognizing that the distinct colors of the two complexes arise from varying coordination numbers of copper (II), grounded in the crystal field theory of inorganic chemistry. Characterization of the complexes was achieved using single crystal X-ray diffraction, powder Xray diffraction, UV-visible spectroscopy, and Fourier transform infrared spectroscopy, confirming the differentiation of the complexes and the successful SCSC transformation. This aspect of the experiment allows students to hone their skills with the Cambridge crystal structure database and enhance their data analysis capabilities, fostering proficiency in operating large-scale instruments safely and accurately. With its streamlined design, modular teaching approach, and cost-effective reagents, this experiment is primed for integration into undergraduate curriculum for chemistry and related disciplines. [ABSTRACT FROM AUTHOR]

In the teaching of Structural Chemistry, the diversity, complexity and abstract nature of crystal structures augment the instructional challenges. This paper delineates the author's pedagogical approach in teaching practice, predicated on the symmetry of crystal structures, following a concrete-abstract-concrete thematic thread, and centering on "extracting commonality-delving into typicals-deriving individuality" to expand the educational methodology in construct a knowledge graph of crystal structures. The specific approach commences with the close-packing of equaldiameter spheres and their void types/distributions as the commonality starting point, progresses through void-filling models to ascertain typical crystal structures, and employs substitution/addition/removal/derivation techniques to establish the crystal structures of specific substances with diversity, thereby forming a knowledge graph with intuitive and contextual relationships. It can deepen students' comprehension of the commonality and individuality in crystal structure education, achieving the purpose of knowledge understanding and transferable application. [ABSTRACT FROM AUTHOR]

This paper provides a brief overview of the blended learning approach in structural chemistry at Peking University, as well as details on the small-group discussion sessions focused on the topic of "lattice structures and properties of crystals". [ABSTRACT FROM AUTHOR]

Crystal structures are important teaching content in structural chemistry courses, which contains many knowledge points, abstract concepts and fundamental theories. This paper explores the descriptions and connotations of several basic concepts of crystal structures, including the lattice, crystal lattice, structural motif, and unit cell. The goal is to help students clarify their understanding of the basic concepts of crystallographic theory. [ABSTRACT FROM AUTHOR]

X-ray diffraction is a pivotal technique for material structure analysis, playing a fundamental role in materials chemistry. In light of the continuous discovery of novel materials, advanced X-ray diffraction methods have emerged at the forefront of materials chemistry. This paper introduces a teaching reform incorporating three advanced X-ray techniques into materials chemistry instruction: high-pressure synchrotron X-ray diffraction, micro-focus X-ray diffraction, and X-ray pair distribution function analysis. We anticipate that such a teaching reform will empower students to deepen their grasp of X-ray diffraction techniques, broaden their academic horizons, and refine their problem-solving skills. [ABSTRACT FROM AUTHOR]

Voltammetry is an important chapter and teaching difficulty in the course of Instrumental Analysis. However, the existing experiment teaching program has shortcomings in theoretical integration and application expansion. This paper introduces a cutting-edge research progress in material sciences, i.e., laser-scribed graphene technology, into voltammetry experiment teaching. The program enriches the experiment contents by introducing basic knowledge such as simulation of diffusion current theory and electrocatalytic phenomena, and extending applications such as vanillin detection in powdered milk. These new contents will help students to deeply understand the basic principles, research trends, and application value of the method. The comprehensive cost of the experiment is low, and the electrodes can be prepared in batches, thus making it suitable for experiment teaching. [ABSTRACT FROM AUTHOR]

Chitosan, a deacetylated form of chitin, is renowned for its exceptional biocompatibility and antibacterial capabilities, making it a material of choice in various biomedical applications such as antimicrobial disinfection and drug delivery. This study, rooted in the principle of sustainable development of waste utilization, employs shrimp shells—an everyday kitchen waste—as the raw material for extracting chitin and preparing chitosan . Comprehensive characterization techniques are conducted to substantiate the viewpoints in the paper, leading to the development of a chitosan-based antibacterial gel. Employing a gradient science popularization program, we captivate audiences ranging from kindergarten children to university students and the general public, illuminating the allure of chemistry. The study aims to spark public interest in the subject, inviting everyone to discard preconceived notions and rediscover the intrinsic beauty of chemistry from a more enlightened vantage point. [ABSTRACT FROM AUTHOR]

This paper exemplifies the arsenic element teaching to introduce the ideological and political educationinfused curriculum design in elemental chemistry. By deeply exploring the ideological and political elements contained within the curriculum, and fully leveraging the implicit permeation of ideological and political education carried by the curriculum, it organically integrates dialectical materialism with scientific thinking, patriotism with social responsibility, and ecological civilization with environmental protection awareness into the curriculum content and classroom teaching. This integration aims to cultivate students’ innovative consciousness, scientific spirit, patriotism, and ecological civilization awareness, striving to synchronously achieve the objectives of “knowledge impartation”, “ability cultivation” and “value guidance”. [ABSTRACT FROM AUTHOR]

In this paper, the existing problems of ideology and politics in laboratory safety education courses in colleges and universities were analyzed, and its educational significance in laboratory safety education was stated. Based on the basic characteristics of laboratory safety education courses, the design and exploration of curriculum ideological and political teaching were summarized in five aspects of teaching objectives, teaching content, teaching methods, teaching evaluation and teaching staff. The constructed curriculum ideological and political teaching system not only cultivates students’ chemical experiment safety knowledge and skills, but also enhances students’ safety awareness, national feelings, moral cultivation and scientific spirit, helping to cultivate high-quality chemical talents with both morality and talent in the new era. [ABSTRACT FROM AUTHOR]

This paper mainly introduced the synthesis method, composition analysis, and bonding performance of high-strength water-based adhesives prepared from polymethylmethacrylate wastes. This experiment can improve students’ experimental skills, broaden their chemical perspectives, and cultivate their innovative thinking. Moreover, teachers can also provide students with ideological and political education regarding the energy and environmental issues involved in this experiment, inspiring students to study hard and use their professional knowledge to serve the country with great determination and sense of mission. [ABSTRACT FROM AUTHOR]