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Molinska P, Tarzia A, Male L, Jelfs KE, Lewis JEM. Diastereoselective Self-Assembly of Low-Symmetry Pd n L 2n Nanocages through Coordination-Sphere Engineering. Angew Chem Int Ed Engl 2023; 62:e202315451. [PMID: 37888946 PMCID: PMC10952360 DOI: 10.1002/anie.202315451] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/13/2023] [Revised: 10/27/2023] [Accepted: 10/27/2023] [Indexed: 10/28/2023]
Abstract
Metal-organic cages (MOCs) are popular host architectures assembled from ligands and metal ions/nodes. Assembling structurally complex, low-symmetry MOCs with anisotropic cavities can be limited by the formation of statistical isomer libraries. We set out to investigate the use of primary coordination-sphere engineering (CSE) to bias isomer selectivity within homo- and heteroleptic Pdn L2n cages. Unexpected differences in selectivities between alternative donor groups led us to recognise the significant impact of the second coordination sphere on isomer stabilities. From this, molecular-level insight into the origins of selectivity between cis and trans diastereoisomers was gained, highlighting the importance of both host-guest and host-solvent interactions, in addition to ligand design. This detailed understanding allows precision engineering of low-symmetry MOC assemblies without wholesale redesign of the ligand framework, and fundamentally provides a theoretical scaffold for the development of stimuli-responsive, shape-shifting MOCs.
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Affiliation(s)
- Paulina Molinska
- School of ChemistryUniversity of Birmingham EdgbastonBirminghamB15 2TTUK
| | - Andrew Tarzia
- Department of Applied Science and TechnologyPolitecnico di TorinoCorso Duca degli Abruzzi 2410129TorinoItaly
| | - Louise Male
- School of ChemistryUniversity of Birmingham EdgbastonBirminghamB15 2TTUK
| | - Kim E. Jelfs
- Department of ChemistryImperial College London, Molecular Sciences Research Hub White City CampusWood LaneLondonW12 0BZUK
| | - James E. M. Lewis
- School of ChemistryUniversity of Birmingham EdgbastonBirminghamB15 2TTUK
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2
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Banerjee R, Bhattacharyya S, Mukherjee PS. Synthesis of an Adaptable Molecular Barrel and Guest Mediated Stabilization of Its Metastable Higher Homologue. JACS AU 2023; 3:1998-2006. [PMID: 37502154 PMCID: PMC10369414 DOI: 10.1021/jacsau.3c00224] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 05/05/2023] [Revised: 06/04/2023] [Accepted: 06/05/2023] [Indexed: 07/29/2023]
Abstract
Structural and functional modulation of three-dimensional artificial macromolecular systems is of immense importance. Designing supramolecular cages that can show stimuli mediated reversible switching between higher-order structures is quite challenging. We report here construction of a Pd6 trifacial barrel (1) by coordination self-assembly. Surprisingly, barrel 1 was found to exhibit guest-responsive behavior. In presence of fullerenes C60 and C70, 1 unprecedentedly transformed to its metastable higher homologue Pd8 tetrafacial barrel (2), forming stable host-guest complexes (C60)3⊂2 and (C70)2⊂2, respectively. Again, encapsulated fullerenes could be extracted from the cavity of 2 using 1,2-dichlorobenzene, leading to its facile conversion to the parent trifacial barrel 1. Such reversible structural interconversion between an adaptable molecular barrel and its guest stabilized higher homologue is an uncommon observation.
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Zhong W, Wang Z, Yu WD, Wang N, Fu F, Wang J, Zhao H, Liu D, Jiang Z, Wang P, Chen M. Bi-directional geometric constraints in the construction of giant dual-rim nanorings. Dalton Trans 2023; 52:7071-7078. [PMID: 37161840 DOI: 10.1039/d3dt00897e] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/11/2023]
Abstract
In the field of metallo-supramolecular assemblies, supramolecular macrocycles have attracted considerable attention due to their guest recognition and catalytic properties. Herein, we report a novel strategy for the construction of giant hollow macrocyclic structures using a bi-directional geometric constraint strategy. We investigated the structural design of two terpyridine-based tetratopic organic ligands, whose inner and outer rims have different angles. Compared to conventional strategies of self-assembly using single angular orientation building blocks that typically generate small macrocyclic objects or polymers, the mutual interaction between the different angles of the ligands could promote the formation of giant hollow macrocyclic supramolecular architectures. The self-assembly mechanism and hierarchical self-assembly of giant supramolecular macrocycles have been characterized by NMR, ESI-MS and TEM experiments. The strategy used in this study not only advances the design of giant 2D macrocycles with large inner diameters but also gives insights into the mechanism of formation of large structures.
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Affiliation(s)
- Wanying Zhong
- Institute of Environmental Research at Greater Bay Area; Guangzhou Key Laboratory for Clean Energy and Materials; Key Laboratory for Water Quality and Conservation of the Pearl River Delta, Ministry of Education, Guangzhou University, Guangzhou, 510006, Guangdong, China.
| | - Zhantao Wang
- Institute of Environmental Research at Greater Bay Area; Guangzhou Key Laboratory for Clean Energy and Materials; Key Laboratory for Water Quality and Conservation of the Pearl River Delta, Ministry of Education, Guangzhou University, Guangzhou, 510006, Guangdong, China.
| | - Wei-Dong Yu
- College of Science, Hunan University of Technology and Business, Changsha 410000, P. R. China
| | - Ning Wang
- Institute of Environmental Research at Greater Bay Area; Guangzhou Key Laboratory for Clean Energy and Materials; Key Laboratory for Water Quality and Conservation of the Pearl River Delta, Ministry of Education, Guangzhou University, Guangzhou, 510006, Guangdong, China.
| | - Fan Fu
- Institute of Environmental Research at Greater Bay Area; Guangzhou Key Laboratory for Clean Energy and Materials; Key Laboratory for Water Quality and Conservation of the Pearl River Delta, Ministry of Education, Guangzhou University, Guangzhou, 510006, Guangdong, China.
| | - Jun Wang
- Institute of Environmental Research at Greater Bay Area; Guangzhou Key Laboratory for Clean Energy and Materials; Key Laboratory for Water Quality and Conservation of the Pearl River Delta, Ministry of Education, Guangzhou University, Guangzhou, 510006, Guangdong, China.
| | - He Zhao
- College of Chemistry and Chemical Engineering; Central South University, Changsha, 410083, Hunan, China
| | - Die Liu
- College of Chemistry and Chemical Engineering; Central South University, Changsha, 410083, Hunan, China
| | - Zhilong Jiang
- Institute of Environmental Research at Greater Bay Area; Guangzhou Key Laboratory for Clean Energy and Materials; Key Laboratory for Water Quality and Conservation of the Pearl River Delta, Ministry of Education, Guangzhou University, Guangzhou, 510006, Guangdong, China.
| | - Pingshan Wang
- Institute of Environmental Research at Greater Bay Area; Guangzhou Key Laboratory for Clean Energy and Materials; Key Laboratory for Water Quality and Conservation of the Pearl River Delta, Ministry of Education, Guangzhou University, Guangzhou, 510006, Guangdong, China.
- College of Chemistry and Chemical Engineering; Central South University, Changsha, 410083, Hunan, China
| | - Mingzhao Chen
- Institute of Environmental Research at Greater Bay Area; Guangzhou Key Laboratory for Clean Energy and Materials; Key Laboratory for Water Quality and Conservation of the Pearl River Delta, Ministry of Education, Guangzhou University, Guangzhou, 510006, Guangdong, China.
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Liu S, Chen H, Fan L, Zhang X. Highly Robust {In 2}-Organic Framework for Efficiently Catalyzing CO 2 Cycloaddition and Knoevenagel Condensation. Inorg Chem 2023; 62:3562-3572. [PMID: 36791403 DOI: 10.1021/acs.inorgchem.2c04130] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/17/2023]
Abstract
To improve the catalytic performance of metal-organic frameworks (MOFs), creating higher defects is now considered as the most effective strategy, which can not only optimize the Lewis acidity of metal ions but also create more pore space to enhance diffusion and mass transfer in the channels. Herein, the exquisite combination of scarcely reported [In2(CO2)5(H2O)2(DMF)2] clusters and 2,6-bis(2,4-dicarboxylphenyl)-4-(4-carboxylphenyl)pyridine (H5BDCP) under solvothermal conditions generated a highly robust nanoporous framework of {[In2(BDCP)(DMF)2(H2O)2](NO3)}n (NUC-65) with nanocaged voids (14.1 Å) and rectangular nanochannels (15.94 Å × 11.77 Å) along the a axis. It is worth mentioning that an In(1) ion displays extremely low tetra-coordination modes after the thermal removal of its associated four solvent molecules of H2O and DMF. Activated {[In2(BDCP)](Br)}n (NUC-65Br), as a defective material because of its extremely unsaturated metal centers, could be generated by bromine ion exchange, solvent exchange, and vacuum drying. Catalytic experiments proved that the conversion of epichlorohydrin with 1 atm CO2 into 4-(chloromethyl)-1,3-dioxolan-2-one catalyzed by 0.11 mol % NUC-65Br could reach 99% at 65 °C within 24 h. Moreover, with the aid of 5 mol % cocatalyst n-Bu4NBr, heterogeneous NUC-65Br owns excellent universal catalytic performance in most epoxides under mild conditions. In addition, NUC-65Br, as a heterogeneous catalyst, exhibits higher activity and better selectivity for Knoevenagel condensation of aldehydes and malononitrile. Hence, this work offers a fresh insight into the design of structure defect cationic metal-organic frameworks, which can be better applied to various fields because of their promoted performance.
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Affiliation(s)
- Shurong Liu
- School of Chemistry and Chemical Engineering, North University of China, Taiyuan 030051, People's Republic of China
| | - Hongtai Chen
- School of Chemistry and Chemical Engineering, North University of China, Taiyuan 030051, People's Republic of China
| | - Liming Fan
- School of Chemistry and Chemical Engineering, North University of China, Taiyuan 030051, People's Republic of China
| | - Xiutang Zhang
- School of Chemistry and Chemical Engineering, North University of China, Taiyuan 030051, People's Republic of China
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Lv H, Chen H, Fan L, Zhang X. Nanocage-Based Tb 3+-Organic Framework for Efficiently Catalyzing the Cycloaddition Reaction of CO 2 with Epoxides and Knoevenagel Condensation. Inorg Chem 2022; 61:15558-15568. [DOI: 10.1021/acs.inorgchem.2c02302] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2022]
Affiliation(s)
- Hongxiao Lv
- Department of Chemistry, College of Science, North University of China, Taiyuan 030051, People’s Republic of China
| | - Hongtai Chen
- Department of Chemistry, College of Science, North University of China, Taiyuan 030051, People’s Republic of China
| | - Liming Fan
- Department of Chemistry, College of Science, North University of China, Taiyuan 030051, People’s Republic of China
| | - Xiutang Zhang
- Department of Chemistry, College of Science, North University of China, Taiyuan 030051, People’s Republic of China
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Liu S, Chen H, Zhang X. Bifunctional {Pb 10K 2}–Organic Framework for High Catalytic Activity in Cycloaddition of CO 2 with Epoxides and Knoevenagel Condensation. ACS Catal 2022. [DOI: 10.1021/acscatal.2c02649] [Citation(s) in RCA: 9] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Affiliation(s)
- Shurong Liu
- Department of Chemistry, College of Science, North University of China, Taiyuan 030051, People’s Republic of China
| | - Hongtai Chen
- Department of Chemistry, College of Science, North University of China, Taiyuan 030051, People’s Republic of China
| | - Xiutang Zhang
- Department of Chemistry, College of Science, North University of China, Taiyuan 030051, People’s Republic of China
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Chen H, Zhang T, Liu S, Lv H, Fan L, Zhang X. Fluorine-Functionalized NbO-Type {Cu 2}-Organic Framework: Enhanced Catalytic Performance on the Cycloaddition Reaction of CO 2 with Epoxides and Deacetalization-Knoevenagel Condensation. Inorg Chem 2022; 61:11949-11958. [PMID: 35839442 DOI: 10.1021/acs.inorgchem.2c01686] [Citation(s) in RCA: 28] [Impact Index Per Article: 14.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Abstract
The high catalytic activity of metal-organic frameworks (MOFs) can be realized by increasing their effective active sites, which prompts us to perform the functionalization on selected linkers by introducing a strong Lewis basic group of fluorine. Herein, the exquisite combination of paddle-wheel [Cu2(CO2)4(H2O)] clusters and meticulously designed fluorine-funtionalized tetratopic 2',3'-difluoro-[p-terphenyl]-3,3″,5,5″-tetracarboxylic acid (F-H4ptta) engenders one peculiar nanocaged {Cu2}-organic framework of {[Cu2(F-ptta)(H2O)2]·5DMF·2H2O}n (NUC-54), which features two types of nanocaged voids (9.8 Å × 17.2 Å and 10.1 Å × 12.4 Å) shaped by 12 paddle-wheel [Cu2(COO)4H2O)2] secondary building units, leaving a calculated solvent-accessible void volume of 60.6%. Because of the introduction of plentifully Lewis base sites of fluorine groups, activated NUC-54a exhibits excellent catalytic performance on the cycloaddition reaction of CO2 with various epoxides under mild conditions. Moreover, to expand the catalytic scope, the deacetalization-Knoevenagel condensation reactions of benzaldehyde dimethyl acetal and malononitrile were performed using the heterogenous catalyst of NUC-54a. Also, NUC-54a features high recyclability and catalytic stability with excellent catalytic performance in subsequent catalytic tests. Therefore, this work not only puts forward a new solution for developing high-efficiency heterogeneous catalysts, but also enriches the functionalization strategies for nanoporous MOFs.
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Affiliation(s)
- Hongtai Chen
- Department of Chemistry, College of Science, North University of China, Taiyuan 030051, People's Republic of China
| | - Tao Zhang
- Department of Materials Engineering, Taiyuan Institute of Technology, Taiyuan 030008, People's Republic of China
| | - Shurong Liu
- Department of Chemistry, College of Science, North University of China, Taiyuan 030051, People's Republic of China
| | - Hongxiao Lv
- Department of Chemistry, College of Science, North University of China, Taiyuan 030051, People's Republic of China
| | - Liming Fan
- Department of Chemistry, College of Science, North University of China, Taiyuan 030051, People's Republic of China
| | - Xiutang Zhang
- Department of Chemistry, College of Science, North University of China, Taiyuan 030051, People's Republic of China
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