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Organic materials possessing multiple functional properties such as aggregation induced emission, mechanochromism and acidochromism are rare. In this paper we demonstrate the design of polyfunctional materials using the aggregation quenching chromophore, pyrene. The pyrene derivatives possessing 2,3,3‐triphenylacrylonitrile as aggregation induced emission chromophore and phenanthroimidazole or N‐phenylcarbazole as auxiliary electron‐rich chromophore are designed, synthesized by Suzuki coupling reactions and characterized as aggregation induced emissive mechanochromic materials. Though all the dyes exhibit aggregation induced emission, the dyes containing para‐linked 2,3,3‐triphenylacrylonitrile and auxiliary chromophore such as phenanthroimidazole or N‐phenylcarbazole display mechanochromism. Additionally, the phenanthroimidazole containing dyes show acidochromism attributable to the protonation of phenanthroimidazole moiety. [ABSTRACT FROM AUTHOR]

Phishing websites have become a significant cybersecurity threat, hosting malware and exploiting users by mimicking popular sites. Victims suffer financial loss, compromised privacy, and damaged reputation. Urgent solutions are needed to mitigate these threats promptly. Our goal is to develop a Chrome extension that utilizes machine learning and deep learning techniques to identify phishing websites and alert users when they visit such sites. When a user opens a website in their browser, the extension operates in the background. If the website is recognized as phishing, a pop-up box with an 'OK' button informs the user. If the website is not flagged as phishing, no action is taken. We employed machine learning algorithms (such as Random Forest) and a Single Layer Perceptron for training the model. The browser extension is written in JavaScript, and its JavaScript file extracts URL features like browser popups, use of frames, and shortening services. The algorithm then determines whether the website is legitimate or not. [ABSTRACT FROM AUTHOR]

Introduction: Patients with perforation peritonitis present in the Emergency Department with various causes, but bowel perforation is the most frequent cause. These patients often arrive late at tertiary centres, resulting in severe peritoneal contamination and septic shock. Therefore, preoperative peritoneal drain placement provides adequate drainage and better outcomes in such cases. Aim: To compare various clinical and laboratory parameters in patients with perforation peritonitis before and after the placement of a peritoneal drain, prior to any definitive surgical treatment. Materials and Methods: A prospective cohort study was conducted in the Department of General Surgery at Kalpana Chawla Government Medical College in Karnal, Haryana, India, from October 2022 to June 2023. All cases of perforation peritonitis that were critically-ill or in shock upon presentation in the emergency department were planned for intraperitoneal drain placement before definitive surgery. A total of 140 patients were enrolled in the study, and their clinical parameters (temperature, pulse rate, SpO2, and urine output) and laboratory parameters (such as leucocyte count, electrolytes (Na+, K+, Ca++), pH, base excess, bicarbonate values, lactate, Random Blood Sugar (RBS), and haematocrit) were compared before and 24 hours after drain placement. Statistical analysis was performed using paired t-test. Results: The mean age of the patients was 46.03±18.06 years, and 116 (82.85%) of the cases were male. The most common comorbid condition was pulmonary disease {Chronic Obstructive Pulmonary Disese (COPD)/Asthma}, diagnosed in 96 (86.57%) cases. The most common perforation site was duodenal, followed by gastric and ileal, observed in 65 cases (46.42%), 23 (16.34%) cases, and 21 (15%) cases, respectively. There was a significant improvement in clinical parameters such as temperature, pulse rate, Saturation of Peripheral Oxygen (SpO2 ), and urine output after drain placement (p-value <0.001). There was also an improvement in laboratory parameters including leucocyte count, electrolytes (Na+, K+, Ca++), pH, base excess, and bicarbonate values (p-value <0.001). The mortality rate was 20%, with 28 cases resulting in death. Conclusion: Although preoperative intraperitoneal drain placement is not a standard surgical procedure for patients with perforation peritonitis, it resuscitates and stabilises the patient, thereby helping in reducing morbidity and mortality postoperatively. [ABSTRACT FROM AUTHOR]

Three pyrazole derivatives, 3,5-dimethyl-1H-pyrazole (DMPz) (I), 3-methyl-5-phenyl-1H-pyrazole (MPPz) (II), and 3,5-diphenyl-1H-pyrazole (DPPz) (III), were prepared via reacting semicarbazide hydrochloride with the acetylacetone, 1-phenylbutane-1,3-dione, and 1,3-diphenylpropane-1,3-dione, respectively. Complexes 1–3 were isolated by reacting CuCl2·2H2O with I–III, respectively, and characterized by CHNS elemental analyses, FT-IR, UV-Vis, 1H and 13C NMR, EPR spectra, and TGA/DTA. Molecular structures of the pyrazole derivatives I–III and copper(II) complexes 2 and 3 were studied through single-crystal XRD analysis to confirm their molecular structures. Overlapping of hyperfine splitting in the EPR spectra of the dimeric copper(II) complexes 1–3 indicates that both copper centers do not possess the same electronic environment in solution. The copper(II) complexes are dimeric in solid state as well as in solution and catalyze the oxidation of various primary and secondary alcohols selectively. Catalysts 1–3 show more than 92% product selectivity toward ketones during the oxidation of secondary alcohols. Surprisingly primary alcohols, which are relatively difficult to oxidize, produce carboxylic acid as a major product (48%–90% selectivity) irrespective of catalytic systems. The selectivity for carboxylic acid rises with decreasing the carbon chain length of the alcohols. An eco-friendly and affordable catalytic system for oxidation of alcohols is developed by the utilization of H2O2, a green oxidant, and water, a clean and greener solvent, which is a notable aspect of the study. [ABSTRACT FROM AUTHOR]

Schiff base-functionalized chloromethylated polystyrenes, PS-[Ae-Eol] (I), PS-[Hy-Eda] (II) and PS-[HyP-Eda] (III), were synthesized by reacting 2-(2-aminoethoxy)ethanol (Ae-Eol), N-(2-hydroxyethyl)ethylenediamine (Hy-Eda), and N-(2-hydroxpropyl)ethylenediamine (HyP-Eda) with oxidized chloromethylated polystyrene. Oxidized chloromethylated polystyrene (PS-CHO) was prepared by oxidation of chloromethylated polystyrene (PS) with sodium bicarbonate in DMSO. By reacting DMSO solution of [VO(acac)2] with polymer-anchored Schiff base ligands I, II, and III, vanadium(IV) complexes PS-[VIVO(Ae-Eol)] (1), PS-[VIVO(Hy-Eda)] (2), and PS-[VIVO(HyP-Eda)] (3) were prepared. Structure and bonding of I, II, and III as well as corresponding vanadium complexes 1, 2, and 3 were confirmed by FT-IR, UV-vis spectroscopy, SEM, EDX, AAS, TGA, EPR, etc. Polymer-anchored vanadium(IV) complexes 1, 2, and 3 show, efficient catalysis toward oxidation of styrene, cyclohexene, allylbenzene, and cis-cyclooctene in the presence of hydrogen peroxide. Optimized reaction conditions for the oxidation of these alkenes was achieved by changing various reaction parameters (like amount of catalyst, amount of oxidizing agent, volume of solvent, etc.). Polymer-grafted 1, 2, and 3 can be reused multiple times without depletion of their activity. [ABSTRACT FROM AUTHOR]

Liquid phase catalytic oxidation of a number of alkenes, for example, cyclohexene, cis‐cyclooctene, styrene, 1‐methyl cyclohexene and 1‐hexene, was performed using polymer‐anchored copper (II) complexes PS‐[Cu (sal‐sch)Cl] (5), PS‐[Cu (sal‐tch)Cl] (6), PS‐[CH2{Cu (sal‐sch)Cl}2] (7) and PS‐[CH2{Cu (sal‐tch)Cl}2] (8). Neat complexes [Cu (sal‐sch)Cl] (1), [Cu (sal‐tch)Cl] (2), [CH2{Cu (sal‐sch)Cl}2] (3) and [CH2{Cu (sal‐tch)Cl}2] (4) were isolated by reacting CuCl2·2H2O with [Hsal‐sch] (I), [Hsal‐tch] (II), [H2bissal‐sch] (III) and [H2bissal‐tch] (IV), respectively, in refluxing methanol. Complexes 1–4 have been covalently anchored in Merrifield resin through the amine nitrogen of the semicarbazide or thiosemicarbazide moiety. A number of analytical, spectroscopic and thermal techniques, such as CHNS analysis, Fourier transform‐infrared, UV–Vis, PMR, 13C‐NMR, electron paramagnetic resonance, scanning electron microscopy, energy‐dispersive X‐ray analysis, thermogravimetric analysis, atomic force microscopy, atomic absorption spectroscopy, and electrospray ionization‐mass spectrometry, were used to analyze and establish the molecular structure of the ligands (I)–(IV) and complexes (1)–(8) in solid state as well as in solution state. Grafted complexes 5–8 were employed as active catalysts for the oxidation of a series of alkenes in the presence of hydrogen peroxide. Copper hydroperoxo species ([CuIII (sal‐sch)‐O‐O‐H]), which is believed to be the active intermediate, generated during the catalytic oxidation of alkenes, are identified. It was found that supported catalysts are very economical, green and efficient in contrast to their neat complexes as well as most of the recently reported heterogeneous catalysts. [ABSTRACT FROM AUTHOR]