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53. Acid-directed synthesis of three Cd-based metal–organic frameworks with luminescence and catalytic CO2 transformation properties.

Author

Zhang, Zhen-Wei, Hu, Hui, Wang, Ming-Zhen, Zhang, Qing, Zhou, Wen-Feng, Zhang, Yan-Kai, Yang, Xin-Yi, Liu, Xue-Ying, Zhang, Yong-Zheng, Geng, Longlong, Liu, Zhong-Min, Zhang, Da-Shuai, Zhuang, Shujuan, Wei, Rong-Min, and Zhang, Xiuling

Subjects
METAL-organic frameworks, COORDINATION polymers, LUMINESCENCE, HYDROTHERMAL synthesis, RING formation (Chemistry)
Abstract

In this paper, we showed an example of acid-directed hydrothermal synthesis of three Cd-based metal–organic frameworks (MOFs) under similar conditions, namely, [Cd(TIDB)(AA)0.5(NO3)]n (1), [Cd3(TIDB)2(AA)2(H2O)2(HCOO)2]n (2), and {[Cd4(TIDB)(AA)4(H2O)5](C2H5OH)2(H2O)2}n (3) (TIDB = 1,3,5-tri(1H-imidazol-1-yl)benzene, H2AA = anthracene-9,10-dicarboxylic acid). Compound 1 was synthesized by the introduction of HNO3 as a structure-directing agent. It has 2D coordination networks with the 3,4-c bey topology. The porous 3D supramolecular framework in compound 1 is stabilized by H-bonds. Compound 2 was formed with the use of a HCOOH agent. It has a 3D coordination network with a new 3,4,5-c underlying net topology, and it is also porous. Compound 3 was obtained using a CH3COOH agent. It has a disordered non-porous 3D coordination network. Because 3 was hard to purify, 1 and 2 were chosen for further property investigation. On the one hand, fluorescence studies showed that 1 and 2 are both blue-emitting MOFs with quantum yields of 2.3% and 0.8%, respectively. On the other hand, CO2 cycloaddition performance was also tested, which revealed that 2 has a superior catalytic conversion of epoxybutane at 60 °C and 1 atm with a high yield of up to 95.6%. [ABSTRACT FROM AUTHOR]

Published
2022
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57. Constructing new metal–organic frameworks with complicated ligands from 'One-Pot' in situ reactions† †Electronic supplementary information (ESI) available: Synthesis of ligands and MOFs, PXRD, FT-IR, TGA, 1H NMR, and crystal data. CCDC 1888829–1888839. For ESI and crystallographic data in CIF or other electronic format see DOI: 10.1039/c9sc00178f

Author

Kong, Xiang-Jing, He, Tao, Zhang, Yong-Zheng, Wu, Xue-Qian, Wang, Si-Nan, Xu, Ming-Ming, Si, Guang-Rui, and Li, Jian-Rong

Subjects
Chemistry
Abstract

A “One-Pot” strategy has been developed to construct new metal–organic frameworks with complicated ligands from simple precursors by integrating organic and coordination chemistry., Metal–organic frameworks (MOFs) have emerged as one of the most fascinating libraries of porous materials. In spite of their myriad merits, practical application of most MOFs is restricted due to their high preparation cost because of the complicated organic ligands involved. To address this limitation, we propose to use simple and cheap organic precursors to synthesize MOFs with complicated ligands via “one-pot” in situ reactions of these precursors along with the formation of new MOFs. In this work, we have carefully screened several organic reactions, through which target ligands were generated in situ from easily available reactants during the MOF construction. With this “one-pot” approach, the fabrication of a series of novel MOFs by integrating the organic covalent bond and the coordinate bond has thus been realized through the judicious selection of organic reactions, which effectively simplifies the MOF synthesis process and thus reduces the cost.

Published
2019

64. Abnormal room temperature phosphorescence of purely organic boron-containing compounds: the relationship between the emissive behaviorand the molecular packing, and the potential related applications† †Electronic supplementary information (ESI) available. CCDC 1547113, 1547361, 1547292, 1547293–1547295, 1547338, 1547298, 1519392 and 1547297. For ESI and crystallographic data in CIF or other electronic format see DOI: 10.1039/c7sc04098a

Author

Chai, Zhaofei, Wang, Can, Wang, Jinfeng, Liu, Fan, Xie, Yujun, Zhang, Yong-Zheng, Li, Jian-Rong, Li, Qianqian, and Li, Zhen

Subjects
Chemistry
Abstract

Long-lived RT phosphorescence was achieved with a series of organic boron-containing compounds due to the rigid conformation and effective π–π stacking in the solid states., Purely organic materials with the characteristic of room-temperature phosphorescence (RTP) under ambient conditions demonstrate potential benefits in advanced optoelectronic applications. Exploration of versatile and efficient RTP compounds with low prices is full of challenges due to the slow intersystem crossing process and ultrafast deactivation of the active excited states of organic compounds. Here, a series of boron-containing phosphors were found to present RTP with long-lived lifetimes. Among these commercially available and cheap compounds, (4-methoxyphenyl)boronic acid (PBA-MeO) exhibits long-lived RTP, with a lifetime of 2.24 s, which is among the longest lifetimes of single-component small molecules. Our extensive experiments illustrate that both a rigid conformation and expanded conjugation induced by molecular alignment contribute to the persistent RTP. Because of strong intermolecular interactions via hydrogen bonds, these arylboronic acids easily form crystals and are quite appropriate for anti-forgery materials. Subsequently, we develop a precise, speedy and convenient inkjet printing technology for the fabrication of optoelectronic displays. Furthermore, PBA-MeO is used as an additive to feed Bombyx mori silkworms and shows low toxicity over inorganic materials. Our findings may pave a new way for the development of RTP phosphors and promote their use in practical applications.

Published
2017

65. Efficient polysulfides conversion on Mo2CTx MXene for high-performance lithium–sulfur batteries.

Author

Zhu, Qi, Xu, Hong-Fei, Shen, Kai, Zhang, Yong-Zheng, Li, Bin, and Yang, Shu-Bin

Abstract

Copyright of Rare Metals is the property of Springer Nature and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Published
2022
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75. A three-dimensional metal–organic framework with high performance of dual cation sensing synthesized via single-crystal transformation.

Author

Talha, Khalid, Alamgir, He, Tao, Xie, Lin-Hua, Wang, Bin, Zhao, Min-Jian, Zhang, Yong-Zheng, Chen, Qiang, and Li, Jian-Rong

Subjects
METAL-organic frameworks, SOLID solutions, CATIONS, DRINKING water, DETECTION limit
Abstract

A layer-pillared three-dimensional (3D) metal–organic framework (MOF) BUT-26 was synthesized from a two-dimensional (2D) MOF BUT-25 through single-crystal to single-crystal (SC-SC) transformation. Two honeycomb-shaped layers were linked by formate ions forming a bilayer structure of BUT-25. The formate pillar was then exchanged by the subsequently added ligand thiophene-2,5-dicarboxylic acid (H2TDC), which successfully stitched the 2D layers of BUT-25 into 3D BUT-26 without disturbing the original honeycomb-shaped layers. Interestingly, BUT-26 with free nitrogen and oxygen sites proved to be a highly sensitive MOF-based sensor with a limit of detection (LOD) of 0.12 μM and 0.1 μM for Cu2+ and Fe3+ ions, respectively. These LOD results are much lower than the minimum values of these ions in drinking water specified by the US-EPA. Sensitive detection accompanied by a visible color change in the solution and solid phase confirms that BUT-26 can be used for colorimetric sensing of both ions. [ABSTRACT FROM AUTHOR]

Published
2020
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82. Derivations and extensions of lie color algebra

Author

Zhang Yong-zheng and Zhang Qingcheng

Subjects
Algebra, Adjoint representation of a Lie algebra, Pure mathematics, Representation of a Lie group, General Mathematics, Simple Lie group, Non-associative algebra, General Physics and Astronomy, Killing form, Affine Lie algebra, Lie conformal algebra, Graded Lie algebra, Mathematics
Abstract

In this article, the authors obtain some results concerning derivations of finitely generated Lie color algebras and discuss the relation between skew derivation space SkDer( L ) and central extension H 2 (L,F) on some Lie color algebras. Meanwhile, they generalize the notion of double extension to quadratic Lie color algebras, a sufficient condition for a quadratic Lie color algebra to be a double extension and further properties are given.

Published
2008
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83. Nanocage containing metal-organic framework constructed from a newly-designed low symmetry tetra-pyrazole ligand

Author

Zhang, Yong-Zheng, He, Tao, Xiu-Liang Lv, Wang, Bin, Xie, Lin-Hua, Liu, Xiao-Min, and Li, Jian-Rong

Abstract

1,3,6,8-Tetra(1H-pyrazol-4-yl)-9H-carbazole (H4CTP), a tetra-pyrazole ligand with Cs symmetry, has been synthesized based on a carbazole core. A solvothermal reaction of this ligand with NiCl2·6H2O gave a three-dimensional (3D) metal-organic framework, [Ni(H4CTP)Cl2]·nS (BUT-41), which crystallized in the cubic space group Pm-3 in spite of H4CPT with a central carbazole core and four peripheral pyrazole rings has low symmetry. The framework of BUT-41 can be regarded as a 4-connected 3D net with the rhr topology when both the organic ligand and the metal center are considered as 4-connected nodes. Nanocages with internal diameter of 2 nm are present in the framework of BUT-41, which are formed by interconnecting twelve H4CTP ligands and twenty Ni(II) ions. Each nanocage connects with six adjacent cages through sharing hexagonal windows with diameter over 7 Å, resulting in 3D intersecting channels of the MOF. Although the tetra-pyrazole ligand is not deprotonated after coordination with the metal ions, powder X-ray diffraction and N2 adsorption experiments reveal that the framework of BUT-41 is rigid and permanently porous with the Brunauer-Emmett-Teller (BET) surface area up to 1551 m2 g−1. Furthermore, gas adsorption experiments show that this MOF selectively adsorbs CO2 over N2 and CH4.

Published
2016
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86. Co7-Cluster-Based Metal–Organic Frameworks with Mixed Carboxylate and Pyrazolate Ligands: Construction and CO2Adsorption and Fixation

Author

Bian, Zhen-Xing, Zhang, Yong-Zheng, Tian, Dan, Zhang, Xiuling, Xie, Lin-Hua, Zhao, Minjian, Xie, Yabo, and Li, Jian-Rong

Abstract

Cluster-based metal–organic frameworks (MOFs) supported by mixed ligands usually have unique properties due to the combined features from different ligands. In this regard, it is rather rare for carboxylate and pyrazolate ligands as “struts” to be present in one MOF. Herein, four isostructural heptanuclear Co(II)-based MOFs based on mixed carboxylate and pyrazolate ligands, [Co7(μ3-OH)4(BDP)2(IPA-X)5] (BUT-127-X; X = H, OH, Br, and NH2, respectively; BDP2–= 1,4-benzenedipyrozolate and IPA2–= isophthalate), were synthesized through carefully tuning the solvothermal reaction conditions. Structurally, in these MOFs, alternately connecting Co7(μ3-OH)4clusters with carboxylate ligands (IPA2–-X) generate two-dimensional (2D) layers, which are further supported by the pyrazolate ligands (BDP2–), giving rise to the final pillared-layer frameworks with well adjustable pore surface environments. They have permanent porosity with high Brunauer–Emmett–Teller surfaces from 1030 to 1314 m2g–1, as well as good chemical stability. Interestingly, four Co(II) atoms in the Co7(μ3-OH)4cluster exhibit a five-coordinated configuration that affords open metal sites. The feature allows these MOFs to present good CO2adsorption performance and catalytic activity for the CO2fixation, where BUT-127-NH2gave the best catalytic performance for the cycloaddition of CO2with epoxides into cyclic carbonates under mild conditions (1 bar, 25 and 50 °C).

Published
2020
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87. Combining unsaturated metal sites and narrow pores within a Co(II)-based MOF towards CO2 separation and transformation.

Author

Zhang, Xiuling, Zhang, Ran-Hui, Hu, Hui, Geng, Longlong, Zhang, Yong-Zheng, Gao, Jun, Zhang, Da-Shuai, Jin, Yao-Qiang, and Sheng, Jianmin

Subjects
METALS, ADSORPTION (Chemistry), CARBONATES
Abstract

A Co(II)-based MOF, {[Co3(L)2(bpb)(DMA)(H2O)]·Solvents}n (RH-1), with a unique interpenetrated framework has been solvothermally prepared. Because of its unsaturated metal sites and narrow pores inside the framework, RH-1 demonstrated excellent selective CO2 adsorption over N2 and CH4 and good performance in catalytic CO2 conversion to cyclic carbonates under mild conditions. [ABSTRACT FROM AUTHOR]

Published
2020
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88. Integrating multiple adsorption sites and tortuous diffusion paths into a metal–organic framework for C3H4/C3H6 separation.

Author

Wu, Xue-Qian, Xie, Yabo, Liu, Jing-Hao, He, Tao, Zhang, Yong-Zheng, Yu, Jiamei, Kong, Xiang-Jing, and Li, Jian-Rong

Abstract

By integrating open metal sites, Lewis basic sites, and tortuous diffusion paths, a new metal–organic framework has been designed and synthesized, which exhibits high adsorption capacity and excellent selectivity for separating a C3H4/C3H6 mixture. Meanwhile, the molecular packing state, dynamic diffusion coefficient of gases within the framework, and binding interaction are studied by molecular simulations. [ABSTRACT FROM AUTHOR]

Published
2019
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89. Two microporous CoII-MOFs with dual active sites for highly selective adsorption of CO2/CH4 and CO2/N2.

Author

Ma, Hui-Yan, Zhang, Yong-Zheng, Yan, Hui, Zhang, Wen-Jie, Li, Yun-Wu, Wang, Su-Na, Li, Da-Cheng, Dou, Jian-Min, and Li, Jian-Rong

Subjects
*ADSORPTION (Chemistry), *ATOMS, *CATIONS, *OXYGEN
Abstract

Simultaneously involving abundant [NH2(CH3)2]+ cations and uncoordinated carboxylate oxygen atoms as dual active sites, two microporous CoII-MOFs (LCU-105 and LCU-106, LCU = Liaocheng University) both exhibit highly selective adsorption of CO2/CH4 and CO2/N2. GCMC theoretical simulations provide good verification of the experimental results. [ABSTRACT FROM AUTHOR]

Published
2019
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90. Two microporous CoII-MOFs with dual active sites for highly selective adsorption of CO2/CH4 and CO2/N2.

Author

Ma, Hui-Yan, Zhang, Yong-Zheng, Yan, Hui, Zhang, Wen-Jie, Li, Yun-Wu, Wang, Su-Na, Li, Da-Cheng, Dou, Jian-Min, and Li, Jian-Rong

Subjects
ADSORPTION (Chemistry), ATOMS, CATIONS, OXYGEN
Abstract

Simultaneously involving abundant [NH2(CH3)2]+ cations and uncoordinated carboxylate oxygen atoms as dual active sites, two microporous CoII-MOFs (LCU-105 and LCU-106, LCU = Liaocheng University) both exhibit highly selective adsorption of CO2/CH4 and CO2/N2. GCMC theoretical simulations provide good verification of the experimental results. [ABSTRACT FROM AUTHOR]

Published
2019
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91. Embedding theorem of filtered lie superalgebras

Author

Zhang Yong-zheng and Shen Guangyu

Subjects
Pure mathematics, Mathematics::Quantum Algebra, General Mathematics, Mathematics::Rings and Algebras, General Physics and Astronomy, Embedding, Homomorphic encryption, Mathematics::Representation Theory, Realization (systems), Mathematics
Abstract

The homomorphic realization of Lie superalgebras and the embedding theorem of filtered Lie superalgebras are given and proved.

Published
2001
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100. Unique T-Shaped Ligand as a New Platform for Metal–Organic Frameworks

Author

He, Tao, Zhang, Yong-Zheng, Kong, Xiang-Jing, Lv, Xiu-Liang, Xie, Lin-Hua, and Li, Jian-Rong

Abstract

The utilization of a rationally designed T-shaped ligand 4,4′,4′′-(1H-benzo[d]imidazole-2,4,7-triyl)tribenzoic acid (H3BTBA) as the platform for constructing metal–organic frameworks (MOFs) with structure diversity was achieved. Five new MOFs, [Zn4O(BTBA)2] (BUT-34), [Fe2CoO(BTBA)2(H2O)3] (BUT-35), [Cu9(BTBA)4(H2O)(DMA)] (BUT-36), [Eu2(HBTBA)2(OH)2(H2O)6] (BUT-37), and [In(BTBA)(DMF)] (BUT-38) (BUT = Beijing University of Technology), have been solvothermally synthesized and structurally characterized. Combining with several popularly used metal-cluster secondary building units, the five MOFs show novel structural features. BUT-34 with typical tetranuclear Zn4O clusters shows three-dimensional (3D) networks with a new (3,6)-connected topology. BUT-35 exhibits a (3,6)-connected flu-3network with trinuclear [Fe2Co(μ3-O)] clusters. BUT-36 represents a mixed Cu(II)/Cu(I) based 3D framework, in which the T-shaped ligand adopts different coordination modes. However, BUT-37 and -38 consist of binuclear Eu2paddle-wheel clusters and single In(III) ions with two-dimensional layer structures, respectively. Clearly, the structural diversity of these MOFs can be attributed to the unique structure and variable coordination patterns of the T-shaped ligand. This work thus enriches the synthetic chemistry of MOFs in the structural design based on the low-symmetric ligands, and thereby function exploration.

Published
2019
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