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Benchimol E, Tessarolo J, Clever GH. Photoswitchable coordination cages. Nat Chem 2024; 16:13-21. [PMID: 38182764 DOI: 10.1038/s41557-023-01387-8] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/12/2023] [Accepted: 10/25/2023] [Indexed: 01/07/2024]
Abstract
Stimuli-responsive behaviour is key to the design of smart materials, surfaces, nano-systems and effector molecules, allowing their application as switchable catalysts, molecular transporters, bioimaging probes or caged drugs. Supramolecular chemistry has embraced the widespread integration of photoswitches because of their precise spatiotemporal addressability and waste-free nature. In the vibrant area of discrete metal-mediated self-assembly, however, photoswitches are still rarely employed. Only recently has it been shown that embedding photoswitches into the organic backbones of coordination cages enables control of their host and material properties and thus unlocks the hitherto unexploited dynamic adaptivity of such systems. Here we discuss four cases where triggering ligand-integrated photoswitches leads to (1) control over disassembly/reassembly, (2) bi-stable switching between defined states, (3) interplay with thermal processes in metastable systems and (4) light-fuelled dissipative self-assembly. We highlight first clues concerning the relationship between fundamental photophysics and dynamic assembly equilibria and propose directions for future development.
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Affiliation(s)
- Elie Benchimol
- Department of Chemistry and Chemical Biology, TU Dortmund University, Dortmund, Germany
| | - Jacopo Tessarolo
- Department of Chemistry and Chemical Biology, TU Dortmund University, Dortmund, Germany.
- Department of Chemistry, Chonnam National University, Gwangju, Republic of Korea.
| | - Guido H Clever
- Department of Chemistry and Chemical Biology, TU Dortmund University, Dortmund, Germany.
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2
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Davies JA, Tarzia A, Ronson TK, Auras F, Jelfs KE, Nitschke JR. Tetramine Aspect Ratio and Flexibility Determine Framework Symmetry for Zn 8 L 6 Self-Assembled Structures. Angew Chem Int Ed Engl 2023; 62:e202217987. [PMID: 36637345 PMCID: PMC10946785 DOI: 10.1002/anie.202217987] [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: 12/06/2022] [Revised: 01/11/2023] [Accepted: 01/12/2023] [Indexed: 01/14/2023]
Abstract
We derive design principles for the assembly of rectangular tetramines into Zn8 L6 pseudo-cubic coordination cages. Because of the rectangular, as opposed to square, geometry of the ligand panels, and the possibility of either Δ or Λ handedness of each metal center at the eight corners of the pseudo-cube, many different cage diastereomers are possible. Each of the six tetra-aniline subcomponents investigated in this work assembled with zinc(II) and 2-formylpyridine in acetonitrile into a single Zn8 L6 pseudo-cube diastereomer, however. Each product corresponded to one of four diastereomeric configurations, with T, Th , S6 or D3 symmetry. The preferred diastereomer for a given tetra-aniline subcomponent was shown to be dependent on its aspect ratio and conformational flexibility. Analysis of computationally modeled individual faces or whole pseudo-cubes provided insight as to why the observed diastereomers were favored.
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Affiliation(s)
- Jack A. Davies
- Yusuf Hamied Department of ChemistryUniversity of CambridgeLensfield RoadCambridgeCB2 1EWUK
| | - Andrew Tarzia
- Department of ChemistryMolecular Sciences Research HubImperial College London White City CampusWood LaneLondonW12 0BZUK
| | - Tanya K. Ronson
- Yusuf Hamied Department of ChemistryUniversity of CambridgeLensfield RoadCambridgeCB2 1EWUK
| | - Florian Auras
- Department of Synthetic Materials and Functional DevicesMax-Planck Institute of Microstructure PhysicsWeinberg 206120HalleGermany
| | - Kim E. Jelfs
- Department of ChemistryMolecular Sciences Research HubImperial College London White City CampusWood LaneLondonW12 0BZUK
| | - Jonathan R. Nitschke
- Yusuf Hamied Department of ChemistryUniversity of CambridgeLensfield RoadCambridgeCB2 1EWUK
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3
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Lewis JEM. Pseudo-heterolepticity in Low-Symmetry Metal-Organic Cages. Angew Chem Int Ed Engl 2022; 61:e202212392. [PMID: 36074024 PMCID: PMC9828238 DOI: 10.1002/anie.202212392] [Citation(s) in RCA: 13] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/22/2022] [Indexed: 01/12/2023]
Abstract
Heteroleptic metal-organic cages, formed through integrative self-assembly of ligand mixtures, are highly attractive as reduced symmetry supramolecular hosts. Ensuring high-fidelity, non-statistical self-assembly, however, presents a significant challenge in molecular engineering due to the inherent difficulty in predicting thermodynamic energy landscapes. In this work, two conceptual strategies are described that circumvent this issue, using ligand design strategies to access structurally sophisticated metal-organic hosts. Using these approaches, it was possible to realise cavity environments described by two inequivalent, unsymmetrical ligand frameworks, representing a significant step forward in the construction of highly anisotropic confined spaces.
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Affiliation(s)
- James E. M. Lewis
- School of ChemistryUniversity of BirminghamEdgbastonBirmingham B15 2TTUK,Previous address: Department of ChemistryMolecular Sciences Research HubImperial College London82 Wood LaneLondonW12 0BZUK
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4
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Lewis J. Pseudo‐heterolepticity in Low‐Symmetry Metal‐Organic Cages. Angew Chem Int Ed Engl 2022. [DOI: 10.1002/ange.202212392] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
- James Lewis
- University of Birmingham School of Chemistry Edgbaston B15 2TT Birmingham UNITED KINGDOM
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5
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Cruz-Nava S, Valencia-Loza SDJ, Percástegui EG. Protection and Transformation of Natural Products within Aqueous Metal–Organic Cages. European J Org Chem 2022. [DOI: 10.1002/ejoc.202200844] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Affiliation(s)
- Sofía Cruz-Nava
- National Autonomous University of Mexico Faculty of Science: Universidad Nacional Autonoma de Mexico Facultad de Ciencias Institute of Chemistry MEXICO
| | | | - Edmundo Guzmán Percástegui
- Universidad Nacional Autónoma de México: Universidad Nacional Autonoma de Mexico Instituto de Química Instituto de Química at CCIQS UAEM-UNAM MEXICO
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Li Z, Shen J, Jiang Q, Shen S, Zhou J, Zeng H. Directionally aligned crown ethers as superactive organocatalysts for transition metal ion-free arylation of unactivated arenes. Chem Asian J 2022; 17:e202200303. [PMID: 35560810 DOI: 10.1002/asia.202200303] [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: 03/24/2022] [Revised: 05/09/2022] [Indexed: 11/08/2022]
Abstract
When one-dimensionally aligned to the same side, multiple non-covalently associated crown ether groups could act as a whole to yield a higher catalytic activity than an individual poorly active crown ether group, delivering the lowest catalyst loading of 1 - 2 mol% among all hitherto known organocatalysts for catalyzing direct arylation of unactivated arenes with haloarenes.
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Affiliation(s)
- Zhaojie Li
- Nanjing University, School of Medicine, CHINA
| | - Jie Shen
- Hainan University, Department of Chemistry, CHINA
| | - Qing Jiang
- Nanjing University, School of Medicine, CHINA
| | - Sheng Shen
- Nanjing University, School of Medicine, CHINA
| | - Jing Zhou
- Nanjing University, Medical School, 22 Hankou Road, 210093, Nanjing, CHINA
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7
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Ngai C, Wu HT, da Camara B, Williams CG, Mueller LJ, Julian RR, Hooley RJ. Moderated Basicity of Endohedral Amine Groups in an Octa-Cationic Self-Assembled Cage. Angew Chem Int Ed Engl 2022; 61:e202117011. [PMID: 35030288 PMCID: PMC8885886 DOI: 10.1002/anie.202117011] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/13/2021] [Indexed: 12/13/2022]
Abstract
A self-assembled FeII4 L6 cage was synthesized with 12 internal amines in the cavity. The cage forms as the dodeca-ammonium salt, despite the cage carrying an overall 8+ charge at the metal centers, extracting protons from displaced water in the reaction. Despite this, the basicity of the internal amines is lower than their counterparts in free solution. The 12 amines have a sliding scale of basicity, with a ≈6 pKa unit difference between the first and last protons to be removed. This moderation of side-chain basicity in an active site is a hallmark of enzymatic catalysis.
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Affiliation(s)
- Courtney Ngai
- Department of Chemistry and the UCR Center for Catalysis, University of California-Riverside, Riverside, CA, 92521, USA
| | - Hoi-Ting Wu
- Department of Chemistry and the UCR Center for Catalysis, University of California-Riverside, Riverside, CA, 92521, USA
| | - Bryce da Camara
- Department of Chemistry and the UCR Center for Catalysis, University of California-Riverside, Riverside, CA, 92521, USA
| | - Christopher G Williams
- Department of Chemistry and the UCR Center for Catalysis, University of California-Riverside, Riverside, CA, 92521, USA
| | - Leonard J Mueller
- Department of Chemistry and the UCR Center for Catalysis, University of California-Riverside, Riverside, CA, 92521, USA
| | - Ryan R Julian
- Department of Chemistry and the UCR Center for Catalysis, University of California-Riverside, Riverside, CA, 92521, USA
| | - Richard J Hooley
- Department of Chemistry and the UCR Center for Catalysis, University of California-Riverside, Riverside, CA, 92521, USA
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Ngai C, Wu H, Camara B, Williams CG, Mueller LJ, Julian RR, Hooley RJ. Moderated Basicity of Endohedral Amine Groups in an Octa‐Cationic Self‐Assembled Cage. Angew Chem Int Ed Engl 2022. [DOI: 10.1002/ange.202117011] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
- Courtney Ngai
- Department of Chemistry and the UCR Center for Catalysis University of California—Riverside Riverside CA, 92521 USA
| | - Hoi‐Ting Wu
- Department of Chemistry and the UCR Center for Catalysis University of California—Riverside Riverside CA, 92521 USA
| | - Bryce Camara
- Department of Chemistry and the UCR Center for Catalysis University of California—Riverside Riverside CA, 92521 USA
| | - Christopher G. Williams
- Department of Chemistry and the UCR Center for Catalysis University of California—Riverside Riverside CA, 92521 USA
| | - Leonard J. Mueller
- Department of Chemistry and the UCR Center for Catalysis University of California—Riverside Riverside CA, 92521 USA
| | - Ryan R. Julian
- Department of Chemistry and the UCR Center for Catalysis University of California—Riverside Riverside CA, 92521 USA
| | - Richard J. Hooley
- Department of Chemistry and the UCR Center for Catalysis University of California—Riverside Riverside CA, 92521 USA
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Wang W, Li X, Zhou PP, Wang Y. Catalysis with Supramolecular Carbon-Bonding Interactions. Angew Chem Int Ed Engl 2021; 60:22717-22721. [PMID: 34352156 DOI: 10.1002/anie.202108973] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/06/2021] [Revised: 08/02/2021] [Indexed: 12/14/2022]
Abstract
Herein, we describe a new catalysis platform, supramolecular carbon-bonding catalysis, which exploits the highly directional weak interactions between carbon centers of catalysts and electron donors to drive chemical reactions. To demonstrate this catalysis approach, we discovered a class of cyclopropane derivatives incorporated with carbonyl, ester and cyano groups as catalysts which showed general catalysis capability in different types of benchmark reactions. Among these typical examples, a challenging tail-to-head terpene cyclization can be achieved by supramolecular carbon-bonding catalysis. The co-crystal structures of catalyst and electron donors, comparison experiments, and titrations support a catalysis mode of carbon-bonding activation of Lewis basic reactants.
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Affiliation(s)
- Wei Wang
- School of Chemistry and Chemical Engineering, Key Laboratory of the Colloid and Interface Chemistry, Ministry of Education, Shandong University, Jinan, 250100, China
| | - Xinxin Li
- School of Chemistry and Chemical Engineering, Key Laboratory of the Colloid and Interface Chemistry, Ministry of Education, Shandong University, Jinan, 250100, China
| | - Pan-Pan Zhou
- Key Laboratory of Advanced Catalysis of Gansu Province, College of Chemistry and Chemical Engineering, Lanzhou University, Lanzhou, 730000, China
| | - Yao Wang
- School of Chemistry and Chemical Engineering, Key Laboratory of the Colloid and Interface Chemistry, Ministry of Education, Shandong University, Jinan, 250100, China.,State Key Laboratory of Crystal Materials, Shandong University, Jinan, 250100, China
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10
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Wang W, Li X, Zhou P, Wang Y. Catalysis with Supramolecular Carbon‐Bonding Interactions. Angew Chem Int Ed Engl 2021. [DOI: 10.1002/ange.202108973] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Affiliation(s)
- Wei Wang
- School of Chemistry and Chemical Engineering Key Laboratory of the Colloid and Interface Chemistry Ministry of Education, Shandong University Jinan 250100 China
| | - Xinxin Li
- School of Chemistry and Chemical Engineering Key Laboratory of the Colloid and Interface Chemistry Ministry of Education, Shandong University Jinan 250100 China
| | - Pan‐Pan Zhou
- Key Laboratory of Advanced Catalysis of Gansu Province College of Chemistry and Chemical Engineering Lanzhou University Lanzhou 730000 China
| | - Yao Wang
- School of Chemistry and Chemical Engineering Key Laboratory of the Colloid and Interface Chemistry Ministry of Education, Shandong University Jinan 250100 China
- State Key Laboratory of Crystal Materials Shandong University Jinan 250100 China
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11
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Shi WJ, Liu D, Li X, Bai S, Wang YY, Han YF. Supramolecular Coordination Cages Based on N-Heterocyclic Carbene-Gold(I) Ligands and Their Precursors: Self-Assembly, Structural Transformation and Guest-Binding Properties. Chemistry 2021; 27:7853-7861. [PMID: 33780062 DOI: 10.1002/chem.202100710] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/26/2021] [Indexed: 01/11/2023]
Abstract
The incorporation of functional groups into the cavity of discrete supramolecular coordination cages (SCCs) will bring unique functions and applications. Here, three dicarboxylate ligands (H2 L1Cl, H2 L2Cl and H2 L3Cl) containing N-heterocyclic carbene (NHC) precursors as linkers were introduced to construct SCCs by combining with two C3 -symmertic (CpZr)3 (μ3 -O)(μ2 -OH)3 clusters as three-connect vertices, resulted in a series of rugby-like V2 E3 (V=vertex, E=edge) type homoleptic cages (SCC-1, SCC-2 and SCC-3). However, V4 E6 -type tetrahedral cages (SCC-4 and SCC-5), incorporating six Au-NHC moieties, were obtained when the corresponding NHC-gold(I) functionalized ligands (H2 L1Au , H2 L2Au ) were applied. For the first time, we present a trackable CpZr-involved cage to cage conversion to generate a heteroleptic V2 E3 cage (SCC-6) from two homoleptic cages (SCC-2 and SCC-5) with different geometries of V2 E3 and V4 E6 . The heteroleptic assembly SCC-6 can also be formed upon a subcomponent displacement strategy. The structural transformation and reassembly processes were detected and monitored by 1 H NMR spectroscopy and electrospray-ionization mass spectrometry. The formation of heteroleptic assembly was further supported by single crystal X-ray diffraction analysis. Moreover, homoleptic cage SCC-2 possesses a trigonal bipyramidal cationic cavity allowing the encapsulation of a series of sulfonate anionic guests.
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Affiliation(s)
- Wen-Jie Shi
- Key Laboratory of Synthetic and Natural Functional Molecule of the Ministry of Education College of Chemistry and Materials Science, Northwest University, Xi'an, 710127, P. R. China
| | - Dan Liu
- Key Laboratory of Synthetic and Natural Functional Molecule of the Ministry of Education College of Chemistry and Materials Science, Northwest University, Xi'an, 710127, P. R. China
| | - Xin Li
- Key Laboratory of Synthetic and Natural Functional Molecule of the Ministry of Education College of Chemistry and Materials Science, Northwest University, Xi'an, 710127, P. R. China
| | - Sha Bai
- Key Laboratory of Synthetic and Natural Functional Molecule of the Ministry of Education College of Chemistry and Materials Science, Northwest University, Xi'an, 710127, P. R. China
| | - Yao-Yu Wang
- Key Laboratory of Synthetic and Natural Functional Molecule of the Ministry of Education College of Chemistry and Materials Science, Northwest University, Xi'an, 710127, P. R. China
| | - Ying-Feng Han
- Key Laboratory of Synthetic and Natural Functional Molecule of the Ministry of Education College of Chemistry and Materials Science, Northwest University, Xi'an, 710127, P. R. China
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