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Metallocavitins as Advanced Enzyme Mimics and Promising Chemical Catalysts. Catalysts 2023. [DOI: 10.3390/catal13020415] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/18/2023] Open
Abstract
The supramolecular approach is becoming increasingly dominant in biomimetics and chemical catalysis due to the expansion of the enzyme active center idea, which now includes binding cavities (hydrophobic pockets), channels and canals for transporting substrates and products. For a long time, the mimetic strategy was mainly focused on the first coordination sphere of the metal ion. Understanding that a highly organized cavity-like enzymatic pocket plays a key role in the sophisticated functionality of enzymes and that the activity and selectivity of natural metalloenzymes are due to the effects of the second coordination sphere, created by the protein framework, opens up new perspectives in biomimetic chemistry and catalysis. There are two main goals of mimicking enzymatic catalysis: (1) scientific curiosity to gain insight into the mysterious nature of enzymes, and (2) practical tasks of mankind: to learn from nature and adopt from its many years of evolutionary experience. Understanding the chemistry within the enzyme nanocavity (confinement effect) requires the use of relatively simple model systems. The performance of the transition metal catalyst increases due to its retention in molecular nanocontainers (cavitins). Given the greater potential of chemical synthesis, it is hoped that these promising bioinspired catalysts will achieve catalytic efficiency and selectivity comparable to and even superior to the creations of nature. Now it is obvious that the cavity structure of molecular nanocontainers and the real possibility of modifying their cavities provide unlimited possibilities for simulating the active centers of metalloenzymes. This review will focus on how chemical reactivity is controlled in a well-defined cavitin nanospace. The author also intends to discuss advanced metal–cavitin catalysts related to the study of the main stages of artificial photosynthesis, including energy transfer and storage, water oxidation and proton reduction, as well as highlight the current challenges of activating small molecules, such as H2O, CO2, N2, O2, H2, and CH4.
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Iron(II) Mediated Supramolecular Architectures with Schiff Bases and Their Spin-Crossover Properties. Molecules 2023; 28:molecules28031012. [PMID: 36770685 PMCID: PMC9919814 DOI: 10.3390/molecules28031012] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/27/2022] [Revised: 01/11/2023] [Accepted: 01/16/2023] [Indexed: 01/20/2023] Open
Abstract
Supramolecular architectures, which are formed through the combination of inorganic metal cations and organic ligands by self-assembly, are one of the techniques in modern chemical science. This kind of multi-nuclear system in various dimensionalities can be implemented in various applications such as sensing, storage/cargo, display and molecular switching. Iron(II) mediated spin-crossover (SCO) supramolecular architectures with Schiff bases have attracted the attention of many investigators due to their structural novelty as well as their potential application possibilities. In this paper, we review a number of supramolecular SCO architectures of iron(II) with Schiff base ligands exhibiting varying geometrical possibilities. The structural and SCO behavior of these complexes are also discussed in detail.
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He YC, Yu HL, Zhao KY, Wang Y, Geng CS, Wu S, Yang HK, Zhao FH. Three new Zn( ii) coordination polymers for highly selective and sensitive detection of Fe 3+. CrystEngComm 2023. [DOI: 10.1039/d2ce01382g] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
In this work, three novel Zn(ii)-CPs with diverse structures and fascinating topologies can be highly selective and sensitive luminescent sensors for detection of Fe3+.
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Affiliation(s)
- Yuan-Chun He
- School of Chemistry and Chemical Engineering, Qufu Normal University, Qufu 273165, P. R. China
| | - Hao-Long Yu
- School of Chemistry and Chemical Engineering, Qufu Normal University, Qufu 273165, P. R. China
| | - Kai-Yang Zhao
- School of Chemistry and Chemical Engineering, Qufu Normal University, Qufu 273165, P. R. China
| | - Yao Wang
- School of Chemistry and Chemical Engineering, Qufu Normal University, Qufu 273165, P. R. China
| | - Chang-Sheng Geng
- School of Chemistry and Chemical Engineering, Qufu Normal University, Qufu 273165, P. R. China
| | - Shuang Wu
- School of Chemistry and Chemical Engineering, Qufu Normal University, Qufu 273165, P. R. China
| | - Hong-Kun Yang
- School of Chemistry and Chemical Engineering, Qufu Normal University, Qufu 273165, P. R. China
| | - Fang-Hua Zhao
- School of Chemistry and Chemical Engineering, Qufu Normal University, Qufu 273165, P. R. China
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Chen JW, Li X, Feng AS, Zou XZ, Li Y, Gu JZ. Four metal–organic architectures from a triphenyl-tricarboxylic acid: synthesis, crystal structures, and catalytic features. TRANSIT METAL CHEM 2022. [DOI: 10.1007/s11243-022-00513-8] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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Antonangelo AR, Hawkins N, Tocci E, Muzzi C, Fuoco A, Carta M. Tröger's Base Network Polymers of Intrinsic Microporosity (TB-PIMs) with Tunable Pore Size for Heterogeneous Catalysis. J Am Chem Soc 2022; 144:15581-15594. [PMID: 35973136 PMCID: PMC9437925 DOI: 10.1021/jacs.2c04739] [Citation(s) in RCA: 9] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
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Heterogeneous catalysis plays a pivotal role in the preparation
of value-added chemicals, and it works more efficiently when combined
with porous materials and supports. Because of that, a detailed assessment
of porosity and pore size is essential when evaluating the performance
of new heterogeneous catalysts. Herein, we report the synthesis and
characterization of a series of novel microporous Tröger’s
base polymers and copolymers (TB-PIMs) with tunable pore size. The
basicity of TB sites is exploited to catalyze the Knoevenagel condensation
of benzaldehydes and malononitrile, and the dimension of the pores
can be systematically adjusted with an appropriate selection of monomers
and comonomers. The tunability of the pore size provides the enhanced
accessibility of the catalytic sites for substrates, which leads to
a great improvement in conversions, with the best results achieving
completion in only 20 min. In addition, it enables the use of large
benzaldehydes, which is prevented when using polymers with very small
pores, typical of conventional PIMs. The catalytic reaction is more
efficient than the corresponding homogeneous counterpart and is ultimately
optimized with the addition of a small amount of a solvent, which
facilitates the swelling of the pores and leads to a further improvement
in the performance and to a better carbon economy. Molecular dynamic
modeling of the copolymers’ structures is employed to describe
the swellability of flexible chains, helping the understanding of
the improved performance and demonstrating the great potential of
these novel materials.
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Affiliation(s)
- Ariana R Antonangelo
- Department of Chemistry, Faculty of Science and Engineering, Swansea University, Grove Building, Singleton Park, Swansea SA2 8PP, U.K
| | - Natasha Hawkins
- Department of Chemistry, Faculty of Science and Engineering, Swansea University, Grove Building, Singleton Park, Swansea SA2 8PP, U.K
| | - Elena Tocci
- Institute on Membrane Technology, National Research Council of Italy (CNR-ITM), via P. Bucci 17/C, Rende (CS) 87036, Italy
| | - Chiara Muzzi
- Institute on Membrane Technology, National Research Council of Italy (CNR-ITM), via P. Bucci 17/C, Rende (CS) 87036, Italy
| | - Alessio Fuoco
- Institute on Membrane Technology, National Research Council of Italy (CNR-ITM), via P. Bucci 17/C, Rende (CS) 87036, Italy
| | - Mariolino Carta
- Department of Chemistry, Faculty of Science and Engineering, Swansea University, Grove Building, Singleton Park, Swansea SA2 8PP, U.K
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He YC, Zhou YH, Zhao Y, Zhang YN, Wang L, Wu S, Zhao FH. Four new coordination polymers constructed by (3-carboxyl-phenyl)-(4-(2’-carboxyl-phenyl)-benzyl) ether and 2,2'-bipyridine. INORG CHEM COMMUN 2022. [DOI: 10.1016/j.inoche.2022.109611] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
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Mannarsamy M, Nandeshwar M, Muduli G, Prabusankar G. Highly Active Cyclic Zinc(II) Thione Catalyst for C-C and C-N Bond Formation Reactions. Chem Asian J 2022; 17:e202200594. [PMID: 35880638 DOI: 10.1002/asia.202200594] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/06/2022] [Revised: 07/23/2022] [Indexed: 11/12/2022]
Abstract
The first discrete seven-membered cyclic zinc(II) complex catalyzed room temperature Knoevenagel condensation reactions, and the synthesis of perimidine derivatives has been reported under mild reaction conditions. The cyclic zinc(II) complex [( L) ZnBr 2 ] ( 1 ) was isolated from the reaction between 1-(2-hydroxyethyl)-3-isopropyl-benzimidazole-2-thione ( L ) and ZnBr 2 . Complex 1 was characterized by different analytic techniques such as FT-IR, CHNS, TGA, NMR, and SCXRD. The mononuclear zinc(II) complex 1 was utilized as a catalyst for Knoevenagel condensation reactions to isolate twenty different substituted methylene malononitriles with excellent yield. Besides, the zinc(II) thione complex 1 was utilized for the synthesis of 2,4-dihydroperimidine derivatives in a highly efficient manner. Catalyst 1 depicted wide substrate scopes. Overall, twenty different substituted methylene malononitriles and nine different perimidine derivatives were synthesized using catalyst 1 at room temperature. The present investigation features a mild and fast synthetic approach along with excellent functional group tolerance.
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Affiliation(s)
| | | | | | - Ganesan Prabusankar
- Indian Institute of Technology-Hyderabad, Chemistry, Kandi Medak Telangana India 502285, 502285, 502285, Hyderabad, INDIA
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Gu WJ, Gu J, Kirillova M, Kirillov A. Zn(II) metal-organic architectures from ether-bridged tetracarboxylate linkers: assembly, structural variety and catalytic features. CrystEngComm 2022. [DOI: 10.1039/d2ce00722c] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Semi-flexible aromatic polycarboxylic acids are gaining impetus in crystal engineering of functional coordination polymers (CPs). This work opens up the use of two ether-bridged tetracarboxylic acids, 3-(2,5-dicarboxyphenoxy)phthalic acid (H4dpa) and...
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