1
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Huang B, Zhou M, Hong QY, Wu MX, Zhao XL, Xu L, Gao EQ, Yang HB, Shi X. A Redox-Active Phenothiazine-based Pd 2L 4-Type Coordination Cage and Its Isolable Crystalline Polyradical Cations. Angew Chem Int Ed Engl 2024; 63:e202407279. [PMID: 38872356 DOI: 10.1002/anie.202407279] [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: 04/16/2024] [Revised: 06/13/2024] [Accepted: 06/13/2024] [Indexed: 06/15/2024]
Abstract
Polyradical cages are of great interest because they show very fascinating physical and chemical properties, but many challenges remain, especially for their synthesis and characterization. Herein, we present the synthesis of a polyradical cation cage 14⋅+ through post-synthetic oxidation of a redox-active phenothiazine-based Pd2L4-type coordination cage 1. It's worth noting that 1 exhibits excellent reversible electrochemical and chemical redox activity due to the introduction of a bulky 3,5-di-tert-butyl-4-methoxyphenyl substituent. The generation of 14⋅+ through reversible electrochemical oxidation is investigated by in situ UV/Vis-NIR and EPR spectroelectrochemistry. Meanwhile, chemical oxidation of 1 can also produce 14⋅+ which can be reversibly reduced back to the original cage 1, and the process is monitored by EPR and NMR spectroscopies. Eventually, we succeed in the isolation and single crystal X-ray diffraction analysis of 14⋅+, whose electronic structure and conformation are distinct to original 1. The magnetic susceptibility measurements indicate the predominantly antiferromagnetic interactions between the four phenothiazine radical cations in 14⋅+. We believe that our study including the facile synthesis methodology and in situ spectroelectrochemistry will shed some light on the synthesis and characterization of novel polyradical systems, opening more perspectives for developing functional supramolecular cages.
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Affiliation(s)
- Bin Huang
- State Key Laboratory of Petroleum Molecular & Process Engineering, Shanghai Key Laboratory of Green Chemistry and Chemical Processes, School of Chemistry and Molecular Engineering, East China Normal University, Shanghai, 200062, China
| | - Manfei Zhou
- State Key Laboratory of Petroleum Molecular & Process Engineering, Shanghai Key Laboratory of Green Chemistry and Chemical Processes, School of Chemistry and Molecular Engineering, East China Normal University, Shanghai, 200062, China
| | - Qiong-Yan Hong
- State Key Laboratory of Petroleum Molecular & Process Engineering, Shanghai Key Laboratory of Green Chemistry and Chemical Processes, School of Chemistry and Molecular Engineering, East China Normal University, Shanghai, 200062, China
| | - Meng-Xiang Wu
- State Key Laboratory of Petroleum Molecular & Process Engineering, Shanghai Key Laboratory of Green Chemistry and Chemical Processes, School of Chemistry and Molecular Engineering, East China Normal University, Shanghai, 200062, China
| | - Xiao-Li Zhao
- State Key Laboratory of Petroleum Molecular & Process Engineering, Shanghai Key Laboratory of Green Chemistry and Chemical Processes, School of Chemistry and Molecular Engineering, East China Normal University, Shanghai, 200062, China
| | - Lin Xu
- State Key Laboratory of Petroleum Molecular & Process Engineering, Shanghai Key Laboratory of Green Chemistry and Chemical Processes, School of Chemistry and Molecular Engineering, East China Normal University, Shanghai, 200062, China
| | - En-Qing Gao
- State Key Laboratory of Petroleum Molecular & Process Engineering, Shanghai Key Laboratory of Green Chemistry and Chemical Processes, School of Chemistry and Molecular Engineering, East China Normal University, Shanghai, 200062, China
| | - Hai-Bo Yang
- State Key Laboratory of Petroleum Molecular & Process Engineering, Shanghai Key Laboratory of Green Chemistry and Chemical Processes, School of Chemistry and Molecular Engineering, East China Normal University, Shanghai, 200062, China
| | - Xueliang Shi
- State Key Laboratory of Petroleum Molecular & Process Engineering, Shanghai Key Laboratory of Green Chemistry and Chemical Processes, School of Chemistry and Molecular Engineering, East China Normal University, Shanghai, 200062, China
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2
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Benchimol E, Ebbert KE, Walther A, Holstein JJ, Clever GH. Ligand Conformation Controls Assembly of a Helicate/Mesocate, Heteroleptic [Pd 2L 2L' 2] Cages and a Six-Jagged [Pd 6L 12] Ring. Chemistry 2024; 30:e202401850. [PMID: 38853595 DOI: 10.1002/chem.202401850] [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: 05/26/2024] [Revised: 06/09/2024] [Accepted: 06/10/2024] [Indexed: 06/11/2024]
Abstract
Molecular building blocks, capable of adopting several strongly deviating conformations, are of particular interest in the development of stimuli-responsive self-assemblies. The pronounced structural flexibility of a short acridone-based bridging ligand, equipped with two monodentate isoquinoline donors, is herein exploited to assemble a surprisingly diverse series of coordination-driven Pd(II) architectures. First, it can form a highly twisted Pd2L4 helicate, transformable into the corresponding mesocate, controlled by temperature, counter anion and choice of solvent. Second, it also allows the formation of heteroleptic cages, either from a mix of ligands with Pd(II) cations or by cage-to-cage transformation from homoleptic assemblies. Here, the acridone-based ligand tolerates counter ligands that carry their donors either in a diverging or converging arrangement, as it can rotate its own coordination sites by 90° and structurally adapt to both situations via shape complementarity. Third, by a near 180° rotation of only one of its arms, the ligand can adopt an S-shape conformation and form an unprecedented C6h-symmetric Pd6L12 saw-toothed six-membered ring.
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Affiliation(s)
- Elie Benchimol
- Department of Chemistry and Chemical Biology, TU Dortmund University, Otto-Hahn-Strasse 6, 44227, Dortmund, Germany
| | - Kristina E Ebbert
- Department of Chemistry and Chemical Biology, TU Dortmund University, Otto-Hahn-Strasse 6, 44227, Dortmund, Germany
| | - Alexandre Walther
- Department of Chemistry and Chemical Biology, TU Dortmund University, Otto-Hahn-Strasse 6, 44227, Dortmund, Germany
| | - Julian J Holstein
- Department of Chemistry and Chemical Biology, TU Dortmund University, Otto-Hahn-Strasse 6, 44227, Dortmund, Germany
| | - Guido H Clever
- Department of Chemistry and Chemical Biology, TU Dortmund University, Otto-Hahn-Strasse 6, 44227, Dortmund, Germany
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3
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Maitra PK, Bhattacharyya S, Hickey N, Mukherjee PS. Self-Assembly of a Water-Soluble Pd 16 Square Bicupola Architecture and Its Use in Aerobic Oxidation in Aqueous Medium. J Am Chem Soc 2024; 146:15301-15308. [PMID: 38785321 DOI: 10.1021/jacs.4c02956] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/25/2024]
Abstract
Designing supramolecular architectures with uncommon geometries has always been a key goal in the field of metal-ligand coordination-driven self-assembly. It acquires added significance if functional building units are employed in constructing such architectures for fruitful applications. In this report, we address both these aspects by developing a water-soluble Pd16L8 coordination cage 1 with an unusual square orthobicupola geometry, which was used for selective aerobic oxidation of aryl sulfides. Self-assembly of a benzothiadiazole-based tetra-pyridyl donor L with a ditopic cis-[(tmeda)Pd(NO3)2] acceptor [tmeda = N,N,N',N'-tetramethylethane-1,2-diamine] produced 1, and the geometry was determined by single-crystal X-ray diffraction study. Unlike the typically observed tri- or tetrafacial barrel, the present Pd16L8 coordination assembly features a distinctive structural topology and is a unique example of a water-soluble molecular architecture with a square orthobicupola geometry. Efficient and selective aerobic oxidation of sulfides to sulfoxides is an important challenge as conventional oxidation generally leads to the formation of sulfoxide along with toxic sulfone. Cage 1, designed with a ligand containing a benzothiadiazole moiety, demonstrates an ability to photogenerate reactive oxygen species (ROS) in water, thus enabling it to serve as a potential photocatalyst. The cage showed excellent catalytic efficiency for highly selective conversion of alkyl and aryl sulfides to their corresponding sulfoxides, therefore without the formation of toxic sulfones and other byproducts, under visible light in aqueous medium.
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Affiliation(s)
- Pranay Kumar Maitra
- Department of Inorganic and Physical Chemistry, Indian Institute of Science, Bangalore 560012, India
| | - Soumalya Bhattacharyya
- Department of Inorganic and Physical Chemistry, Indian Institute of Science, Bangalore 560012, India
| | - Neal Hickey
- Department of Chemical and Pharmaceutical Sciences, University of Trieste, Trieste 34127, Italy
| | - Partha Sarathi Mukherjee
- Department of Inorganic and Physical Chemistry, Indian Institute of Science, Bangalore 560012, India
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4
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Sivalingam V, Parbin M, Krishnaswamy S, Chand DK. Cage-To-Cage Transformations in Self-Assembled Coordination Cages Using "Acid/Base" or "Guest Binding-Induced Strain" as Stimuli. Angew Chem Int Ed Engl 2024; 63:e202403711. [PMID: 38567836 DOI: 10.1002/anie.202403711] [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: 02/22/2024] [Indexed: 05/03/2024]
Abstract
Controlling supramolecular systems between different functional forms by utilizing acids/bases as stimuli is a formidable challenge, especially where labile coordination bonds are involved. A pair of acid/base responsive, interconvertible 1,5-enedione/pyrylium based Pd2L4-type cages are prepared that exhibit differential guest binding abilities towards disulfonates of varied sizes. A three-state switch has been achieved, where (i) a weakly coordinating base induced cage-to-cage transformation in the first step, (ii) a strongly coordinating base triggered cage disassembly as the second step, and (iii) the third step shows acid(strong) promoted generation of initial cage, thereby completing the cycle. To our surprise, binding of a specific disulfonate guest facilitated cage-to-cage transformations by inducing strain on the cage assembly thereby opening the labile pyrylium rings of the cage. Through a competitive guest binding study, we demonstrated the superior guest binding capability of the octacationic pyrylium-based cage over a similar-sized tetracationic cage. These results provide a reliable approach to reversibly modulate the guest binding properties of acid/base-responsive self-assembled coordination cages.
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Affiliation(s)
- Vellaiyadevan Sivalingam
- IoE Center of Molecular Architecture, Department of Chemistry, Indian Institute of Technology Madras, Chennai, 600036, India
| | - Minaz Parbin
- IoE Center of Molecular Architecture, Department of Chemistry, Indian Institute of Technology Madras, Chennai, 600036, India
| | - Shobhana Krishnaswamy
- IoE Center of Molecular Architecture, Department of Chemistry, Indian Institute of Technology Madras, Chennai, 600036, India
| | - Dillip Kumar Chand
- IoE Center of Molecular Architecture, Department of Chemistry, Indian Institute of Technology Madras, Chennai, 600036, India
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5
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Lai YL, Xie M, Zhou XC, Wang XZ, Zhu XW, Luo D, Zhou XP, Li D. Precise Post-Synthetic Modification of Heterometal-Organic Capsules for Selectively Encapsulating Tetrahedral Anions. Angew Chem Int Ed Engl 2024; 63:e202402829. [PMID: 38380830 DOI: 10.1002/anie.202402829] [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: 02/07/2024] [Revised: 02/18/2024] [Accepted: 02/19/2024] [Indexed: 02/22/2024]
Abstract
Post-synthetic modification plays a crucial role in precisely adjusting the structure and functions of advanced materials. Herein, we report the self-assembly of a tubular heterometallic Pd3Cu6L16 capsule that incorporates Pd(II) and CuL1 metalloligands. This capsule undergoes further modification with two tridentate anionic ligands (L2) to afford a bicapped Pd3Cu6L16L22 capsule with an Edshammer polyhedral structure. By employing transition metal ions, acid, and oxidation agents, the bicapped capsule can be converted into an uncapped one. This uncapped form can then revert back to the bicapped structure on the addition of Br- ions and a base. Interestingly, introducing Ag+ ions leads to the removal of one L2 ligand from the bicapped capsule, yielding a mono-capped Pd3Cu6L16L2 structure. Furthermore, the size of the anions critically influences the precise control over the post-synthetic modifications of the capsules. It was demonstrated that these capsules selectively encapsulate tetrahedral anions, offering a novel approach for the design of intelligent molecular delivery systems.
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Affiliation(s)
- Ya-Liang Lai
- College of Chemistry and Materials Science, Guangdong Provincial Key Laboratory of Functional Supramolecular Coordination Materials and Applications, Jinan University, Guangzhou, Guangdong 510632, P. R. China
| | - Mo Xie
- College of Chemistry and Materials Science, Guangdong Provincial Key Laboratory of Functional Supramolecular Coordination Materials and Applications, Jinan University, Guangzhou, Guangdong 510632, P. R. China
| | - Xian-Chao Zhou
- College of Chemistry and Materials Science, Guangdong Provincial Key Laboratory of Functional Supramolecular Coordination Materials and Applications, Jinan University, Guangzhou, Guangdong 510632, P. R. China
| | - Xue-Zhi Wang
- College of Chemistry and Materials Science, Guangdong Provincial Key Laboratory of Functional Supramolecular Coordination Materials and Applications, Jinan University, Guangzhou, Guangdong 510632, P. R. China
| | - Xiao-Wei Zhu
- School of Chemistry and Environment, Guangdong Engineering Technology Developing Center of High-Performance CCL, Jiaying University, Meizhou, Guangdong 514015, PR China
| | - Dong Luo
- College of Chemistry and Materials Science, Guangdong Provincial Key Laboratory of Functional Supramolecular Coordination Materials and Applications, Jinan University, Guangzhou, Guangdong 510632, P. R. China
| | - Xiao-Ping Zhou
- College of Chemistry and Materials Science, Guangdong Provincial Key Laboratory of Functional Supramolecular Coordination Materials and Applications, Jinan University, Guangzhou, Guangdong 510632, P. R. China
| | - Dan Li
- College of Chemistry and Materials Science, Guangdong Provincial Key Laboratory of Functional Supramolecular Coordination Materials and Applications, Jinan University, Guangzhou, Guangdong 510632, P. R. China
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6
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Delecluse M, Manick AD, Chatelet B, Chevallier-Michaud S, Moraleda D, Riggi ID, Dutasta JP, Martinez A. Ditopic Covalent Cage for Ion-Pair Binding: Influence of Anion Complexation on the Cation Exchange Rate. Chempluschem 2024; 89:e202300558. [PMID: 37950861 DOI: 10.1002/cplu.202300558] [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: 10/02/2023] [Revised: 11/07/2023] [Accepted: 11/08/2023] [Indexed: 11/13/2023]
Abstract
A new hemicryptophane host with a ditopic molecular cavity combining a cyclotriveratrylene (CTV) unit with a tris-urea moiety was synthesized. The complexation of halides, tetramethylammonium (TMA+) cation, and ion pairs was investigated. A positive cooperativity was observed, since halides display a higher binding constant when a TMA+ cation is already present inside the cage. When TMA+ was complexed alone, a decrease of temperature from 298 K to 230 K was required to switch from a fast to a slow exchange regime on the NMR time scale. Nevertheless, the prior complexation of a halide guest in the lower part of the host resulted in significant decrease of the exchange rate of the subsequent complexation of the TMA+ cation. Under these conditions, the 1H NMR signals characteristic of a slow exchange regime were observed at 298 K. Addition of an excess of salts, increases the ionic strength of the solution, restoring the fast exchange dynamics. This result provides insight on how the exchange rate of a cation guest can be modulated by the complexation of a co-guest anion.
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Affiliation(s)
- Magalie Delecluse
- Aix-Marseille Univ., CNRS, Centrale Marseille iSm2, UMR 7113, 13397, Marseille, France
| | - Anne-Doriane Manick
- Aix-Marseille Univ., CNRS, Institut de Chimie, Radicalaire, UMR 7273, 13397, Marseille, France
| | - Bastien Chatelet
- Aix-Marseille Univ., CNRS, Centrale Marseille iSm2, UMR 7113, 13397, Marseille, France
| | | | - Delphine Moraleda
- Aix-Marseille Univ., CNRS, Centrale Marseille iSm2, UMR 7113, 13397, Marseille, France
| | - Innocenzo de Riggi
- Aix-Marseille Univ., CNRS, Centrale Marseille iSm2, UMR 7113, 13397, Marseille, France
| | - Jean-Pierre Dutasta
- ENS Lyon, CNRS, Laboratoire de Chimie UMR 5182 46 Allée d'Italie, 69364, Lyon, France
| | - Alexandre Martinez
- Aix-Marseille Univ., CNRS, Centrale Marseille iSm2, UMR 7113, 13397, Marseille, France
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7
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Yao Y, Shao C, Wang S, Gong Q, Liu J, Jiang H, Wang Y. Dual-controlled guest release from coordination cages. Commun Chem 2024; 7:43. [PMID: 38413721 PMCID: PMC10899651 DOI: 10.1038/s42004-024-01128-z] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/18/2024] [Accepted: 02/09/2024] [Indexed: 02/29/2024] Open
Abstract
Despite having significant applications in the construction of controlled delivery systems with high anti-interference capability, to our knowledge dual-controlled molecular release has not yet been achieved based on small molecular/supramolecular entities. Herein, we report a dual-controlled release system based on coordination cages, for which releasing the guest from the cage demands synchronously altering the coordinative metal cations and the solvent. The cages, Hg5L2 and Ag5L2, are constructed via coordination-driven self-assembly of a corannulene-based ligand. While Hg5L2 shows a solvent-independent guest encapsulation in all the studied solvents, Ag5L2 is able to encapsulate the guests in only some of the solvents, such as acetone-d6, but will liberate the encapsulated guests in 1,1,2,2-tetrachloroethane-d2. Hg5L2 and Ag5L2 are interconvertible. Thus, the release of guests from Hg5L2 in acetone-d6 can be achieved, but requires two separate operations, including metal substitutions and a change of the solvent. Dual-controlled systems as such could be useful in complicated molecular release process to avoid those undesired stimulus-responses.
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Affiliation(s)
- Yuqing Yao
- College of Chemistry, Beijing Normal University, Beijing, 100875, P. R. China
| | - Chengyuan Shao
- College of Chemistry, Beijing Normal University, Beijing, 100875, P. R. China
| | - Shuwei Wang
- College of Chemistry, Beijing Normal University, Beijing, 100875, P. R. China
| | - Qiufang Gong
- College of Chemistry, Beijing Normal University, Beijing, 100875, P. R. China
| | - Jia Liu
- College of Chemistry, Beijing Normal University, Beijing, 100875, P. R. China
| | - Hua Jiang
- College of Chemistry, Beijing Normal University, Beijing, 100875, P. R. China.
| | - Ying Wang
- College of Chemistry, Beijing Normal University, Beijing, 100875, P. R. China.
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8
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Algar JL, Phillips JE, Evans JD, Preston D. Stoichiometric Control of Guest Recognition of Self-Assembled Palladium(II)-Based Supramolecular Architectures. Chem Asian J 2023; 18:e202300673. [PMID: 37643994 DOI: 10.1002/asia.202300673] [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: 08/01/2023] [Revised: 08/28/2023] [Accepted: 08/29/2023] [Indexed: 08/31/2023]
Abstract
We report flexible [Pd(L)2 ]2+ complexes where there is self-recognition, driven by π-π interactions between electron-rich aromatic arms and the cationic regions they are tethered to. This self-recognition hampers the association of these molecules with aromatic molecular targets in solution. In one case, this complex can be reversibly converted to an 'open' [Pd2 (L)2 ]4+ macrocycle through introduction of more metal ion. This is accomplished by the ligand having two bidentate binding sites: a 2-pyridyl-1,2,3-triazole site, and a bis-1,2,3-triazole site. Due to favourable hydrogen bonding, the 2-pyridyl-1,2,3-triazole units reliably coordinate in the [Pd(L)2 ]2+ complex to control speciation: a second equivalent of Pd(II) is required to enforce coordination to bis-triazole sites and form the macrocycle. The macrocycle interacts with a molecular substrate with higher affinity. In this fashion we are able to use stoichiometry to reversibly switch between two different species and regulate guest binding.
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Affiliation(s)
- Jess L Algar
- Research School of Chemistry, Australian National University, Canberra, ACT 2600, Australia
| | - James E Phillips
- Research School of Chemistry, Australian National University, Canberra, ACT 2600, Australia
| | - Jack D Evans
- Centre for Advanced Nanomaterials and Department of Chemistry, The University of Adelaide, Adelaide, SA 5000, Australia
| | - Dan Preston
- Research School of Chemistry, Australian National University, Canberra, ACT 2600, Australia
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9
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Zheng J, Yang Y, Ronson TK, Wood DM, Nitschke JR. Redox Triggers Guest Release and Uptake Across a Series of Azopyridine-Based Metal-Organic Capsules. ADVANCED MATERIALS (DEERFIELD BEACH, FLA.) 2023; 35:e2302580. [PMID: 37462086 DOI: 10.1002/adma.202302580] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/20/2023] [Revised: 06/29/2023] [Indexed: 09/21/2023]
Abstract
Precise control over guest release and recapture using external stimuli is a valuable goal, potentially enabling new modes of chemical purification. Including redox moieties within the ligand cores of molecular capsules to trigger the release and uptake of guests has proved effective, but this technique is limited to certain capsules and guests. Herein, the construction of a series of novel metal-organic capsules from ditopic, tritopic, and tetratopic ligands is demonstrated, all of which contain redox-active azo groups coordinated to FeII centers. Compared to their iminopyridine-based analogs, this new class of azopyridine-based capsules possesses larger cavities, capable of encapsulating more voluminous guests. Upon reduction of the capsules, their guests are released and may then be re-encapsulated when the capsules are regenerated by oxidation. Since the redox centers are on the ligand arms, they are modular and can be attached to a variety of ligand cores to afford varying and predictable architectures. This method thus shows promise as a generalized approach for designing redox-controlled guest release and uptake systems.
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Affiliation(s)
- Jieyu Zheng
- Yusuf Hamied Department of Chemistry, University of Cambridge, Lensfield Road, Cambridge, CB2 1EW, UK
| | - Yuchong Yang
- Yusuf Hamied Department of Chemistry, University of Cambridge, Lensfield Road, Cambridge, CB2 1EW, UK
| | - Tanya K Ronson
- Yusuf Hamied Department of Chemistry, University of Cambridge, Lensfield Road, Cambridge, CB2 1EW, UK
| | - Daniel M Wood
- Yusuf Hamied Department of Chemistry, University of Cambridge, Lensfield Road, Cambridge, CB2 1EW, UK
| | - Jonathan R Nitschke
- Yusuf Hamied Department of Chemistry, University of Cambridge, Lensfield Road, Cambridge, CB2 1EW, UK
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10
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Toyama K, Tanaka Y, Yoshizawa M. A Redox-Responsive Ferrocene-Based Capsule Displaying Unusual Encapsulation-Induced Charge-Transfer Interactions. Angew Chem Int Ed Engl 2023; 62:e202308331. [PMID: 37407426 DOI: 10.1002/anie.202308331] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/13/2023] [Revised: 07/01/2023] [Accepted: 07/05/2023] [Indexed: 07/07/2023]
Abstract
A ferrocene-based capsule is spontaneously and quantitatively formed in water by the assembly of bent amphiphiles carrying two ferrocene units. The disassembly and assembly of the new organometallic capsule, with a well-defined and highly condensed ferrocene core, are demonstrated by chemical redox stimuli in a fully reversible fashion under ambient conditions. In contrast to previously reported multiferrocene assemblies, only the present capsule efficiently encapsulates typical organic/inorganic dyes as well as electron-accepting molecules in water. As a result, unusual host-guest charge-transfer (CT) interactions, displaying relatively wide absorption bands in the visible to near-infrared region (λ=650-1350 nm), are observed upon the encapsulation of acceptors (i.e., chloranil and TCNQ). The resultant encapsulation-induced CT interactions can be released by a redox stimulus through the disassembly of the capsule.
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Affiliation(s)
- Kazuki Toyama
- Laboratory for Chemistry and Life Science, Institute of Innovative Research, Tokyo Institute of Technology, 4259 Nagatsuta, Midori-ku, Yokohama 226-8503, Japan
| | - Yuya Tanaka
- Laboratory for Chemistry and Life Science, Institute of Innovative Research, Tokyo Institute of Technology, 4259 Nagatsuta, Midori-ku, Yokohama 226-8503, Japan
| | - Michito Yoshizawa
- Laboratory for Chemistry and Life Science, Institute of Innovative Research, Tokyo Institute of Technology, 4259 Nagatsuta, Midori-ku, Yokohama 226-8503, Japan
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11
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Zhou LP, Feng XS, Hu SJ, Sun QF. Controlled Self-Assembly, Isomerism, and Guest Uptake/Release of Charge-Reversible Lanthanide-Organic Octahedral Cages. J Am Chem Soc 2023; 145:17845-17855. [PMID: 37545096 DOI: 10.1021/jacs.3c04921] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 08/08/2023]
Abstract
Charge plays a crucial role in the function of molecular and supramolecular systems, but coordination hosts capable of orthogonal charge regulation remain elusive so far. In this study, we report the condition-dependent self-assembly of charge-reversible lanthanide-organic tetra-capped octahedral cages, i.e., [Ln6(H3L)4]6+ and [Ln6L4]6-, from a series of lanthanide ions (Ln3+; Ln = Lu, Yb, Eu) and a tritopic tetradentate acylhydrazone ligand (H6L) featuring multiple deprotonation states and propeller conformations. While direct self-assembly under basic conditions produced a mixture of various ΔxΛ6-x-[Ln6L4]6- (x = 0-6) stereoisomers, racemic Δ6- and Λ6-[Ln6L4]6- could be exclusively obtained from the first self-assembly of Δ6- and Λ6-[Ln6(H3L)4]6+ under neutral conditions followed by post-assembly deprotonation. Rich isomerism on the tetra-capped octahedral cages arising from the coupling between the metal-centered Δ/Λ chirality and the ligand conformations has been discussed based on X-ray single-crystal structures of the C3-symmetric Δ3Λ3-Ln6L4 and T-symmetric Δ6/Λ6-Ln6L4 complexes. Host-guest studies confirmed that positively charged rac-Δ6/Λ6-[Ln6(H3L)4]6+ could bind anionic sulfonates, and negatively charged rac-Δ6/Λ6-[Ln6L4]6- exhibited strong encapsulation ability toward ammonium guests, where acid/base-triggered guest uptake/release could be realized taking advantage of the charge reversibility of the cage. Moreover, photophysical studies revealed visible-light-sensitized and guest-encapsulation-enhanced NIR emissions on the rac-Δ6/Λ6-Yb6L4 cage. This work not only enriches the library of functional lanthanide-organic cages but also provides a promising candidate with charge reversibility for the development of smart supramolecular materials.
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Affiliation(s)
- Li-Peng Zhou
- State Key Laboratory of Structural Chemistry, Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences, Fuzhou 350002, P. R. China
| | - Xiao-Shan Feng
- State Key Laboratory of Structural Chemistry, Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences, Fuzhou 350002, P. R. China
| | - Shao-Jun Hu
- State Key Laboratory of Structural Chemistry, Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences, Fuzhou 350002, P. R. China
| | - Qing-Fu Sun
- State Key Laboratory of Structural Chemistry, Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences, Fuzhou 350002, P. R. China
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12
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Jansen-van Vuuren RD, Naficy S, Ramezani M, Cunningham M, Jessop P. CO 2-responsive gels. Chem Soc Rev 2023; 52:3470-3542. [PMID: 37128844 DOI: 10.1039/d2cs00053a] [Citation(s) in RCA: 6] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/03/2023]
Abstract
CO2-responsive materials undergo a change in chemical or physical properties in response to the introduction or removal of CO2. The use of CO2 as a stimulus is advantageous as it is abundant, benign, inexpensive, and it does not accumulate in a system. Many CO2-responsive materials have already been explored including polymers, latexes, surfactants, and catalysts. As a sub-set of CO2-responsive polymers, the study of CO2-responsive gels (insoluble, cross-linked polymers) is a unique discipline due to the unique set of changes in the gels brought about by CO2 such as swelling or a transformed morphology. In the past 15 years, CO2-responsive gels and self-assembled gels have been investigated for a variety of emerging potential applications, reported in 90 peer-reviewed publications. The two most widely exploited properties include the control of flow (fluids) via CO2-triggered aggregation and their capacity for reversible CO2 absorption-desorption, leading to applications in Enhanced Oil Recovery (EOR) and CO2 sequestration, respectively. In this paper, we review the preparation, properties, and applications of these CO2-responsive gels, broadly classified by particle size as nanogels, microgels, aerogels, and macrogels. We have included a section on CO2-induced self-assembled gels (including poly(ionic liquid) gels).
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Affiliation(s)
- Ross D Jansen-van Vuuren
- Faculty of Chemistry and Chemical Technology, University of Ljubljana, Večna pot 113, 1000 Ljubljana, Slovenia
| | - Sina Naficy
- School of Chemical and Biomolecular Engineering, Centre for Excellence in Advanced Food Enginomics (CAFE), The University of Sydney, Sydney, NSW 2006, Australia
| | - Maedeh Ramezani
- Department of Chemistry, Chernoff Hall, Queen's University, Kingston, Ontario, K7K 2N1, Canada.
| | - Michael Cunningham
- Department of Engineering, Dupuis Hall, Queen's University, Kingston, Ontario, K7L 3N6, Canada
| | - Philip Jessop
- Department of Chemistry, Chernoff Hall, Queen's University, Kingston, Ontario, K7K 2N1, Canada.
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13
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Xue W, Wu K, Ouyang N, Brotin T, Nitschke JR. Allosterically Regulated Guest Binding Determines Framework Symmetry for an Fe II 4 L 4 Cage. Angew Chem Int Ed Engl 2023; 62:e202301319. [PMID: 36866857 PMCID: PMC10947561 DOI: 10.1002/anie.202301319] [Citation(s) in RCA: 8] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/26/2023] [Indexed: 03/04/2023]
Abstract
Self-assembly of a flexible tritopic aniline and 3-substituted 2-formylpyridine subcomponents around iron(II) templates gave rise to a low-spin FeII 4 L4 capsule, whereas a high-spin FeII 3 L2 sandwich species formed when a sterically hindered 6-methyl-2-formylpyridine was used. The FeII 4 L4 cage adopted a new structure type with S4 symmetry, having two mer-Δ and two mer-Ʌ metal vertices, as confirmed by NMR and X-ray crystallographic analysis. The flexibility of the face-capping ligand endows the resulting FeII 4 L4 framework with conformational plasticity, enabling it to adapt structurally from S4 to T or C3 symmetry upon guest binding. The cage also displayed negative allosteric cooperativity in simultaneously binding different guests within its cavity and at the apertures between its faces.
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Affiliation(s)
- Weichao Xue
- Yusuf Hamied Department of ChemistryUniversity of CambridgeCambridgeCB2 1EWUK
| | - Kai Wu
- Yusuf Hamied Department of ChemistryUniversity of CambridgeCambridgeCB2 1EWUK
| | - Nianfeng Ouyang
- Yusuf Hamied Department of ChemistryUniversity of CambridgeCambridgeCB2 1EWUK
| | - Thierry Brotin
- Laboratoire de chimieUniversité LyonEns de Lyon, CNRS UMR 518269342LyonFrance
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14
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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: 5] [Impact Index Per Article: 5.0] [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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15
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Tremlett WDJ, Söhnel T, Crowley JD, Wright LJ, Hartinger CG. Ferrocene-Derived Palladium(II)-Based Metallosupramolecular Structures: Synthesis, Guest Interaction, and Stimulus-Responsiveness Studies. Inorg Chem 2023; 62:3616-3628. [PMID: 36791401 DOI: 10.1021/acs.inorgchem.2c04399] [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
Using ferrocene-based ligand systems, a series of heterobimetallic architectures of the general formula [PdmLn]x+ were designed with the aim of installing an opening and closing mechanism that would allow the release and binding of guest molecules. Palladium complex formation was achieved through coordination to pyridyl groups, and using 2-, 3-, and 4-pyridyl derivatives provided access to defined PdL, PdL2, and Pd2L4 structures, respectively. The supramolecular complexes were characterized using nuclear magnetic resonance (NMR) and infrared spectroscopy, mass spectrometry, and elemental analysis, and for some examples density functional theory calculations and single-crystal X-ray diffraction analysis. 1H NMR spectroscopy was used to investigate disassembly and reassembly of the metallosupramolecular structures. The former was induced by cleavage of the relatively labile Pd-Npyridyl bonds with the introduction of the competing ligands N,N'-dimethylaminopyridine (DMAP) and Cl- (using tetrabutylammonium chloride) to yield [Pd(DMAP)4]2+ and [PdCl4]2-, respectively. The process was found to be reversible for several of the heterodimetallic compounds, with the addition of H+ or Ag+ triggering complex reassembly. Guest binding studies with several architectures revealed interactions with the anionic guests p-toluenesulfonate and octyl sulfate, but not with neutral molecules. Furthermore, the release of guests was reversibly induced with Cl- ions as a stimulus.
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Affiliation(s)
- William D J Tremlett
- School of Chemical Sciences, University of Auckland, 23 Symonds Street, Auckland 1010, New Zealand
| | - Tilo Söhnel
- School of Chemical Sciences, University of Auckland, 23 Symonds Street, Auckland 1010, New Zealand
| | - James D Crowley
- Department of Chemistry, University of Otago, P.O. Box 56, Dunedin 9054, New Zealand
| | - L James Wright
- School of Chemical Sciences, University of Auckland, 23 Symonds Street, Auckland 1010, New Zealand
| | - Christian G Hartinger
- School of Chemical Sciences, University of Auckland, 23 Symonds Street, Auckland 1010, New Zealand
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16
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Bouteille Q, Sonet D, Hennebelle M, Desvergne JP, Morvan E, Scalabre A, Pouget E, Méreau R, Bibal B. Singlet Oxygen Responsive Molecular Receptor to Modulate Atropisomerism and Cation Binding. Chemistry 2023; 29:e202203210. [PMID: 36639240 DOI: 10.1002/chem.202203210] [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: 10/13/2022] [Indexed: 01/15/2023]
Abstract
In switchable molecular recognition, 1 O2 stimulus responsive receptors offer a unique structural change that is rarely exploited. The employed [4+2] reaction between 1 O2 and anthracene derivatives is quantitative, reversible and easily implemented. To evaluate the full potential of this new stimulus, a non-macrocyclic anthracene-based host was designed for the modular binding of cations. The structural investigation showed that 1 O2 controlled the atropisomerism in an on/off fashion within the pair of hosts. The binding studies revealed higher association constants for the endoperoxide receptor compared to the parent anthracene, due to a more favoured preorganization of the recognition site. The fatigue of the 1 O2 switchable hosts and their complexes was monitored over five cycles of cycloaddition/cycloreversion.
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Affiliation(s)
- Quentin Bouteille
- Institut des Sciences Moléculaires UMR CNRS 5255, Université de Bordeaux, 351 cours de la Libération, 33405, Talence, France
| | - Dorian Sonet
- Institut des Sciences Moléculaires UMR CNRS 5255, Université de Bordeaux, 351 cours de la Libération, 33405, Talence, France
| | - Marc Hennebelle
- Institut des Sciences Moléculaires UMR CNRS 5255, Université de Bordeaux, 351 cours de la Libération, 33405, Talence, France
| | - Jean-Pierre Desvergne
- Institut des Sciences Moléculaires UMR CNRS 5255, Université de Bordeaux, 351 cours de la Libération, 33405, Talence, France
| | - Estelle Morvan
- Institut Européen de Chimie et Biologie, UAR 3033 CNRS INSERM, Université de Bordeaux, 2 rue Roger Escarpit, 33607, Pessac, France
| | - Antoine Scalabre
- Chimie et Biologie des Membranes et des Nanoobjets, UMR CNRS 5248, Université de Bordeaux, 2 rue Roger Escarpit, 33607, Pessac, France
| | - Emilie Pouget
- Chimie et Biologie des Membranes et des Nanoobjets, UMR CNRS 5248, Université de Bordeaux, 2 rue Roger Escarpit, 33607, Pessac, France
| | - Raphaël Méreau
- Institut des Sciences Moléculaires UMR CNRS 5255, Université de Bordeaux, 351 cours de la Libération, 33405, Talence, France
| | - Brigitte Bibal
- Institut des Sciences Moléculaires UMR CNRS 5255, Université de Bordeaux, 351 cours de la Libération, 33405, Talence, France
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17
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Lin HY, Wang YT, Shi X, Yang HB, Xu L. Switchable metallacycles and metallacages. Chem Soc Rev 2023; 52:1129-1154. [PMID: 36722920 DOI: 10.1039/d2cs00779g] [Citation(s) in RCA: 34] [Impact Index Per Article: 34.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/26/2023]
Abstract
Two-dimensional metallacycles and three-dimensional metallacages constructed by coordination-driven self-assembly have attracted much attention because they exhibit unique structures and properties and are highly efficient to synthesize. Introduction of switching into supramolecular chemistry systems is a popular strategy, as switching can endow systems with reversible features that are triggered by different stimuli. Through this strategy, novel switchable metallacycles and metallacages were generated, which can be reversibly switched into different stable states with distinct characteristics by external stimuli. Switchable metallacycles and metallacages exhibit versatile structures and reversible properties and are inherently dynamic and respond to artificial signals; thus, these structures have many promising applications in a wide range of fields, such as drug delivery, data processing, pollutant removal, switchable catalysis, smart functional materials, etc. This review focuses on the design of switchable metallacycles and metallacages, their switching behaviours and mechanisms triggered by external stimuli, and the corresponding structural changes and resultant properties and functions.
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Affiliation(s)
- Hong-Yu Lin
- Shanghai Key Laboratory of Green Chemistry and Chemical Processes, Shanghai Frontiers Science Center of Molecule Intelligent Syntheses, School of Chemistry and Molecular Engineering, East China Normal University, 3663 N. Zhongshan Road, Shanghai, P. R. China.
| | - Yu-Te Wang
- Shanghai Key Laboratory of Green Chemistry and Chemical Processes, Shanghai Frontiers Science Center of Molecule Intelligent Syntheses, School of Chemistry and Molecular Engineering, East China Normal University, 3663 N. Zhongshan Road, Shanghai, P. R. China.
| | - Xueliang Shi
- Shanghai Key Laboratory of Green Chemistry and Chemical Processes, Shanghai Frontiers Science Center of Molecule Intelligent Syntheses, School of Chemistry and Molecular Engineering, East China Normal University, 3663 N. Zhongshan Road, Shanghai, P. R. China.
| | - Hai-Bo Yang
- Shanghai Key Laboratory of Green Chemistry and Chemical Processes, Shanghai Frontiers Science Center of Molecule Intelligent Syntheses, School of Chemistry and Molecular Engineering, East China Normal University, 3663 N. Zhongshan Road, Shanghai, P. R. China. .,Wuhu Hospital Affiliated to East China Normal University (The Second People's Hospital of Wuhu), Wuhu 241001, P. R. China
| | - Lin Xu
- Shanghai Key Laboratory of Green Chemistry and Chemical Processes, Shanghai Frontiers Science Center of Molecule Intelligent Syntheses, School of Chemistry and Molecular Engineering, East China Normal University, 3663 N. Zhongshan Road, Shanghai, P. R. China. .,Wuhu Hospital Affiliated to East China Normal University (The Second People's Hospital of Wuhu), Wuhu 241001, P. R. China
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18
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Zhu J, Chen X, Jin X, Wang Q. Light-driven interconversion of Pd2L4 cage and mononuclear PdL2 mediated by the isomerization of azobenzene ligand. CHINESE CHEM LETT 2022. [DOI: 10.1016/j.cclet.2022.108002] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
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19
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Wu K, Tessarolo J, Baksi A, Clever GH. Guest-Modulated Circularly Polarized Luminescence by Ligand-to-Ligand Chirality Transfer in Heteroleptic Pd II Coordination Cages. Angew Chem Int Ed Engl 2022; 61:e202205725. [PMID: 35616285 PMCID: PMC9544203 DOI: 10.1002/anie.202205725] [Citation(s) in RCA: 24] [Impact Index Per Article: 12.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/19/2022] [Indexed: 11/11/2022]
Abstract
Multicomponent metallo-supramolecular assembly allows the rational combination of different building blocks. Discrete multifunctional hosts with an accessible cavity can be prepared in a non-statistical fashion. We employ our shape-complementary assembly (SCA) method to achieve for the first time integrative self-sorting of heteroleptic PdII cages showing guest-tunable circularly polarized luminescence (CPL). An enantiopure helicene-based ligand (M or P configuration) is coupled with a non-chiral emissive fluorenone-based ligand (A or B) to form a series of Pd2 L2 L'2 assemblies. The modular strategy allows to impart the chiral information of the helicenes to the overall supramolecular system, resulting in CPL from the non-chiral component. Guest binding results in a 4-fold increase of CPL intensity. The principle offers potential to generate libraries of multifunctional materials with applications in molecular recognition, enantioselective photo-redox catalysis and information processing.
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Affiliation(s)
- Kai Wu
- Department of Chemistry and Chemical BiologyTU Dortmund UniversityOtto Hahn Str. 644227DortmundGermany
- Department of ChemistryUniversity of CambridgeLensfield RoadCambridgeCB2 1EWUK
| | - Jacopo Tessarolo
- Department of Chemistry and Chemical BiologyTU Dortmund UniversityOtto Hahn Str. 644227DortmundGermany
| | - Ananya Baksi
- Department of Chemistry and Chemical BiologyTU Dortmund UniversityOtto Hahn Str. 644227DortmundGermany
| | - Guido H. Clever
- Department of Chemistry and Chemical BiologyTU Dortmund UniversityOtto Hahn Str. 644227DortmundGermany
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20
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Das R, Linseis M, Scheerer S, Zoller K, Senft L, Ivanović-Burmazović I, Winter RF. Reversible Multielectron Release from Redox-Active Three-Dimensional Molecular Barrels with Ruthenium-Alkenyl Moieties. Inorg Chem 2022; 61:12662-12677. [PMID: 35917328 DOI: 10.1021/acs.inorgchem.2c01608] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
Three-dimensional molecular barrels Ru6-4 and Ru6-5 were synthesized in high yields from dinuclear ruthenium-vinyl clamps and tritopic triphenylamine-derived carboxylate linkers and characterized by multinuclear NMR spectroscopy including 1H-1H COSY and 1H DOSY measurements, high-resolution electrospray ionization mass spectrometry, and X-ray crystallography. The metal frameworks of the cages adopt the shape of twisted trigonal prisms, and they crystallize as racemic mixtures of interdigitating Δ- and Λ-enantiomers with a tight columnar packing in Ru6-4. Electrochemical studies and redox titrations revealed that the cages are able to release up to 11 electrons on the voltammetric timescale and that their cage structures persist up to the hexacation level. IR and UV-vis-near-infrared spectroelectrochemical studies confirm substituent-dependent intramolecular electronic communication within the π-conjugated 1,3-divinylphenylene backbone in the tricationic states, where all three divinylphenylene-bridged diruthenium clamps are present in mixed-valent radical cation states. The formation of 1:3 charge-transfer salts with 2,3,5,6-tetrafluoro-7,7,8,8-tetracyanoquinodimethane as the electron acceptor is also demonstrated.
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Affiliation(s)
- Rajorshi Das
- Fachbereich Chemie, Universität Konstanz, Universitätsstraße 10, 78457 Konstanz, Germany
| | - Michael Linseis
- Fachbereich Chemie, Universität Konstanz, Universitätsstraße 10, 78457 Konstanz, Germany
| | - Stefan Scheerer
- Fachbereich Chemie, Universität Konstanz, Universitätsstraße 10, 78457 Konstanz, Germany
| | - Katrin Zoller
- Fachbereich Chemie, Universität Konstanz, Universitätsstraße 10, 78457 Konstanz, Germany
| | - Laura Senft
- Department Chemie, Ludwig-Maximilians Universität München, Butenandtstraße 5-13, Haus D, 81377 München, Germany
| | - Ivana Ivanović-Burmazović
- Department Chemie, Ludwig-Maximilians Universität München, Butenandtstraße 5-13, Haus D, 81377 München, Germany
| | - Rainer F Winter
- Fachbereich Chemie, Universität Konstanz, Universitätsstraße 10, 78457 Konstanz, Germany
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21
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McTernan C, Davies JA, Nitschke JR. Beyond Platonic: How to Build Metal-Organic Polyhedra Capable of Binding Low-Symmetry, Information-Rich Molecular Cargoes. Chem Rev 2022; 122:10393-10437. [PMID: 35436092 PMCID: PMC9185692 DOI: 10.1021/acs.chemrev.1c00763] [Citation(s) in RCA: 84] [Impact Index Per Article: 42.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/01/2021] [Indexed: 12/17/2022]
Abstract
The field of metallosupramolecular chemistry has advanced rapidly in recent years. Much work in this area has focused on the formation of hollow self-assembled metal-organic architectures and exploration of the applications of their confined nanospaces. These discrete, soluble structures incorporate metal ions as 'glue' to link organic ligands together into polyhedra.Most of the architectures employed thus far have been highly symmetrical, as these have been the easiest to prepare. Such high-symmetry structures contain pseudospherical cavities, and so typically bind roughly spherical guests. Biomolecules and high-value synthetic compounds are rarely isotropic, highly-symmetrical species. To bind, sense, separate, and transform such substrates, new, lower-symmetry, metal-organic cages are needed. Herein we summarize recent approaches, which taken together form the first draft of a handbook for the design of higher-complexity, lower-symmetry, self-assembled metal-organic architectures.
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Affiliation(s)
| | | | - Jonathan R. Nitschke
- Yusuf Hamied Department of Chemistry, University of Cambridge, Lensfield Road, Cambridge CB2 1EW, United Kingdom
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22
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Wu K, Tessarolo J, Baksi A, Clever GH. Guest‐modulated Circularly Polarized Luminescence by Ligand‐to‐Ligand Chirality Transfer in Heteroleptic Pd(II) Coordination Cages. Angew Chem Int Ed Engl 2022. [DOI: 10.1002/ange.202205725] [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)
- Kai Wu
- TU Dortmund: Technische Universitat Dortmund Chemistry and Chemical Biology GERMANY
| | - Jacopo Tessarolo
- TU Dortmund: Technische Universitat Dortmund Chemistry and Chemical Biology GERMANY
| | - Ananya Baksi
- TU Dortmund: Technische Universitat Dortmund Chemistry and Chemical Biology GERMANY
| | - Guido H. Clever
- TU Dortmund University Faculty for Chemistry and Chemical Biology Otto-Hahn-Str. 6 44227 Dortmund GERMANY
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23
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Owatari Y, Iseki S, Ogata D, Yuasa J. Catalytic electron drives host-guest recognition. Chem Sci 2022; 13:5261-5267. [PMID: 35655551 PMCID: PMC9093170 DOI: 10.1039/d2sc01342h] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/07/2022] [Accepted: 04/03/2022] [Indexed: 01/17/2023] Open
Abstract
Electron injection is demonstrated to trigger electrocatalytic chain reactions capable of releasing a solvent molecule and forming a redox active guest molecule. One-electron reduction of a hydroxy anthrone derivative (AQH-CH2CN) results in the formation of an anthraquinone radical anion (AQ˙-) and acetonitrile (CH3CN). The resulting fragment of AQ˙- exhibits high stability under mild reducing conditions, and it has enough reducing power to reduce the reactant of AQH-CH2CN. Hence, subsequent electron transfer from AQ˙- to AQH-CH2CN yields the secondary AQ˙- and CH3CN, while the initial AQ˙- is subsequently oxidized to AQ. Overall, the reactants of AQH-CH2CN are completely converted into AQ and CH3CN in sustainable electrocatalytic chain reactions. These electrocatalytic chain reactions are mild and sustainable, successfully achieving catalytic electron-triggered charge-transfer (CT) complex formation. Reactant AQH-CH2CN is non-planar, making it unsuitable for CT interaction with an electron donor host compound (UHAnt2) bearing parallel anthracene tweezers. However, conversion of AQH-CH2CN to planar electron acceptor AQ by the electrocatalytic chain reactions turns on CT interaction, generating a host CT complex with UHAnt2 (AQ ⊂ UHAnt2). Therefore, sustainable electrocatalytic chain reactions can control CT interactions using only a catalytic amount of electrons, ultimately affording a one-electron switch associated with catalytic electron-triggered turn-on molecular recognition.
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Affiliation(s)
- Yoshihiro Owatari
- Department of Applied Chemistry, Tokyo University of Science 1-3 Kagurazaka, Shinjuku Tokyo 162-8601 Japan +81-3-72-6179
| | - Shuta Iseki
- Department of Applied Chemistry, Tokyo University of Science 1-3 Kagurazaka, Shinjuku Tokyo 162-8601 Japan +81-3-72-6179
| | - Daiji Ogata
- Department of Applied Chemistry, Tokyo University of Science 1-3 Kagurazaka, Shinjuku Tokyo 162-8601 Japan +81-3-72-6179
| | - Junpei Yuasa
- Department of Applied Chemistry, Tokyo University of Science 1-3 Kagurazaka, Shinjuku Tokyo 162-8601 Japan +81-3-72-6179
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24
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Lee H, Tessarolo J, Langbehn D, Baksi A, Herges R, Clever GH. Light-Powered Dissipative Assembly of Diazocine Coordination Cages. J Am Chem Soc 2022; 144:3099-3105. [PMID: 35081312 PMCID: PMC8874908 DOI: 10.1021/jacs.1c12011] [Citation(s) in RCA: 63] [Impact Index Per Article: 31.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
![]()
Stimuli-responsive
coordination cages allow reversible control
over guest binding and release, relevant for adaptive receptors, carriers,
catalysts, and complex systems. Light serves as an advantageous stimulus,
as it can be applied with precise spatial and temporal resolution
without producing chemical waste products. We report the first Pd-mediated
coordination cage based on ligands embedding a diazocine photoswitch.
While the thermodynamically more stable cis-photoisomer
sloppily assembles to a mixture of species with general formula [Pdncis-L2n], the less stable trans-isomer yields a defined [Pd2trans-L4] cage that reversibly converts
back to the cis-system by irradiation at 530 nm or
thermal relaxation. The [Pdncis-L2n]
species do not bind a given guest; however, [Pd2trans-L4] is able to
encapsulate a bis-sulfonate as long as it is kept assembled, requiring
continuous irradiation at 385 nm. In the absence of UV light, thermal
relaxation results in back-switching and guest release. Assembly and
properties of the system were characterized by a combination of NMR,
ion mobility ESI-MS, single-crystal X-ray diffraction, and UV–vis
absorption studies.
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Affiliation(s)
- Haeri Lee
- Department of Chemistry and Chemical Biology, TU Dortmund University, Otto Hahn Straße 6, 44227 Dortmund, Germany.,Department of Chemistry, Hannam University, 1646, Yuseong-daero, Yuseong-gu, Daejeon, 34054, Republic of Korea
| | - Jacopo Tessarolo
- Department of Chemistry and Chemical Biology, TU Dortmund University, Otto Hahn Straße 6, 44227 Dortmund, Germany
| | - Daniel Langbehn
- Otto Diels Institute of Organic Chemistry, Christian-Albrechts University, Otto Hahn Platz 4, 24118 Kiel, Germany
| | - Ananya Baksi
- Department of Chemistry and Chemical Biology, TU Dortmund University, Otto Hahn Straße 6, 44227 Dortmund, Germany
| | - Rainer Herges
- Otto Diels Institute of Organic Chemistry, Christian-Albrechts University, Otto Hahn Platz 4, 24118 Kiel, Germany
| | - Guido H Clever
- Department of Chemistry and Chemical Biology, TU Dortmund University, Otto Hahn Straße 6, 44227 Dortmund, Germany
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25
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Hamashima K, Yuasa J. Entropy Versus Enthalpy Controlled Temperature/Redox Dual‐Triggered Cages for Selective Anion Encapsulation and Release. Angew Chem Int Ed Engl 2022. [DOI: 10.1002/ange.202113914] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- Kyosuke Hamashima
- Department of Applied Chemistry Tokyo University of Science 1–3 Kagurazaka Shinjuku-ku, Tokyo 162-8601 Japan
| | - Junpei Yuasa
- Department of Applied Chemistry Tokyo University of Science 1–3 Kagurazaka Shinjuku-ku, Tokyo 162-8601 Japan
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26
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Yuan J, Lv W, Li A, Zhu K. A self-assembled M 2L 2 truncated square and its application as a container for fullerenes. Chem Commun (Camb) 2021; 57:12848-12851. [PMID: 34787602 DOI: 10.1039/d1cc05581j] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/19/2023]
Abstract
An unprecedented bisthianthrene dipyridyl ligand was designed and synthesized for coordination driven self-assembly. The combination of this conformationally dynamic linker with a 90° convergent metal corner exclusively afforded a novel M2L2 truncated square-like metallamacrocycle. The single crystal X-ray structure reveals a belt-shaped geometry with a cavity diameter of ca. 13.7 Å. The breathable cavity and electron-rich thianthreno panels enable the highly efficient binding of the fullerenes C60 (Ka = 5.1 × 106 M-1) and C70 (Ka = 3.7 × 106 M-1). The encapsulation of C60 is fully confirmed by NMR, mass spectroscopy and single crystal X-ray diffraction analyses. The cyclic voltammograms further reveal that the truncated square is redox active. The strong binding affinity, adaptive complexation, and redox activity of the thianthrene-incorporated metallamacrocycle provide new insights into the design of supramolecular hosts.
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Affiliation(s)
- Jun Yuan
- School of Chemistry, Sun Yat-Sen University, Guangzhou, 510275, China.
| | - Wanqian Lv
- School of Chemistry, Sun Yat-Sen University, Guangzhou, 510275, China.
| | - Anquan Li
- School of Chemistry, Sun Yat-Sen University, Guangzhou, 510275, China.
| | - Kelong Zhu
- School of Chemistry, Sun Yat-Sen University, Guangzhou, 510275, China.
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27
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Hamashima K, Yuasa J. Entropy Versus Enthalpy Controlled Temperature/Redox Dual-Triggered Cages for Selective Anion Encapsulation and Release. Angew Chem Int Ed Engl 2021; 61:e202113914. [PMID: 34796586 DOI: 10.1002/anie.202113914] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/13/2021] [Indexed: 11/08/2022]
Abstract
New C3 -symmetric imidazole ligands were designed with phosphine and phosphine oxide linkers (LP and LPO , respectively) to demonstrate a dual-triggered dynamic closed coordination cage. Both LP and LPO form discrete Zn4 L4 -closed cages (1P and 1PO , respectively) with excellent selectively for BPh4 - , whereas 1P and 1PO encapsulate neither a slightly larger size anion [B(C6 H4 CH3 )4 - ] nor smaller size anions (BF4 - , PF6 - , SbF6 - , and OSO2 CF3 - ). 1PO exhibits more negative enthalpy and entropy changes upon anion encapsulation, thus releasing almost all of the encapsulated anions at high temperature (343 K) (trigger 1: BPh4 - ⊂1PO ← → 1PO +BPh4 - ). In contrast 1P has less negative enthalpy and entropy changes, thus preserving the captured anion over a wide range of temperatures (298 K to 343 K). The 1P cage can be quantitatively oxidized to the 1PO cage by a mild oxidant (Ox.=H2 O2 ), and therefore the captured anion can be released by a redox triggering event (trigger 2: BPh4 - ⊂1P +Ox.→1PO +BPh4 - ).
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Affiliation(s)
- Kyosuke Hamashima
- Department of Applied Chemistry, Tokyo University of Science, 1-3 Kagurazaka, Shinjuku-ku, Tokyo, 162-8601, Japan
| | - Junpei Yuasa
- Department of Applied Chemistry, Tokyo University of Science, 1-3 Kagurazaka, Shinjuku-ku, Tokyo, 162-8601, Japan
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28
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Dekhtiarenko M, Pascal S, Elhabiri M, Mazan V, Canevet D, Allain M, Carré V, Aubriet F, Voitenko Z, Sallé M, Siri O, Goeb S. Reversible pH-Controlled Catenation of a Benzobisimidazole-Based Tetranuclear Rectangle. Chemistry 2021; 27:15922-15927. [PMID: 34478209 DOI: 10.1002/chem.202103039] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/19/2021] [Indexed: 11/09/2022]
Abstract
The development of methodologies to control on demand and reversibly supramolecular transformations from self-assembled metalla-structures requires the rational design of architectures able to answer to an applied stimulus. While solvent or concentration changes, light exposure or addition of a chemical have been largely explored to provide these transformations, the case of pH sensitive materials is less described. Herein, we report the first example of a pH-triggered dissociation of a coordination-driven self-assembled interlocked molecular link. It incorporates a pH sensitive benzobisimidazole-based ligand that can be selectively protonated on its bisimidazole moieties. This generates intermolecular electrostatic repulsions that reduces drastically the stability of the interlocked structure, leading to its dissociation without any sign of protonation of the pyridine moieties involved in the coordination bonds. Importantly, the dissociation process is reversible through addition of a base.
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Affiliation(s)
- Maksym Dekhtiarenko
- Univ Angers, CNRS, MOLTECH-Anjou, 2 bd Lavoisier, 49045, Angers, France.,Taras Shevchenko National University of Kyiv, 64/13 Volodymyrska st., Kyiv, 01033, Ukraine
| | - Simon Pascal
- Aix Marseille Univ, CNRS UMR 7325, Centre Interdisciplinaire de Nanoscience de Marseille (CINaM), Campus de Luminy, 13288, Marseille cedex 09, France
| | - Mourad Elhabiri
- Université de Strasbourg, Université de Haute-Alsace, CNRS, LIMA, UMR 7042, Equipe Chimie Bioorganique et Médicinale, ECPM, 25 Rue Becquerel, 67000, Strasbourg, France
| | - Valerie Mazan
- Université de Strasbourg, Université de Haute-Alsace, CNRS, LIMA, UMR 7042, Equipe Chimie Bioorganique et Médicinale, ECPM, 25 Rue Becquerel, 67000, Strasbourg, France
| | - David Canevet
- Univ Angers, CNRS, MOLTECH-Anjou, 2 bd Lavoisier, 49045, Angers, France
| | - Magali Allain
- Univ Angers, CNRS, MOLTECH-Anjou, 2 bd Lavoisier, 49045, Angers, France
| | - Vincent Carré
- LCP-A2MC, FR 3624, Université de Lorraine, ICPM, 1 Bd Arago, 57078, Metz Cedex 03, France
| | - Frédéric Aubriet
- LCP-A2MC, FR 3624, Université de Lorraine, ICPM, 1 Bd Arago, 57078, Metz Cedex 03, France
| | - Zoia Voitenko
- Taras Shevchenko National University of Kyiv, 64/13 Volodymyrska st., Kyiv, 01033, Ukraine
| | - Marc Sallé
- Univ Angers, CNRS, MOLTECH-Anjou, 2 bd Lavoisier, 49045, Angers, France
| | - Olivier Siri
- Aix Marseille Univ, CNRS UMR 7325, Centre Interdisciplinaire de Nanoscience de Marseille (CINaM), Campus de Luminy, 13288, Marseille cedex 09, France
| | - Sébastien Goeb
- Univ Angers, CNRS, MOLTECH-Anjou, 2 bd Lavoisier, 49045, Angers, France
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29
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Huang B, Mao L, Shi X, Yang HB. Recent advances and perspectives on supramolecular radical cages. Chem Sci 2021; 12:13648-13663. [PMID: 34760150 PMCID: PMC8549795 DOI: 10.1039/d1sc01618k] [Citation(s) in RCA: 22] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/01/2021] [Accepted: 08/31/2021] [Indexed: 12/20/2022] Open
Abstract
Supramolecular radical chemistry has been emerging as a cutting-edge interdisciplinary field of traditional supramolecular chemistry and radical chemistry in recent years. The purpose of such a fundamental research field is to combine traditional supramolecular chemistry and radical chemistry together, and take the benefit of both to eventually create new molecules and materials. Recently, supramolecular radical cages have been becoming one of the most frontier and challenging research focuses in the field of supramolecular chemistry. In this Perspective, we give a brief introduction to organic radical chemistry, supramolecular chemistry, and the emerging supramolecular radical chemistry along with their history and application. Subsequently, we turn to the main part of this topic: supramolecular radical cages. The design and synthesis of supramolecular cages consisting of redox-active building blocks and radical centres are summarized. The host-guest interactions between supramolecular (radical) cages and organic radicals are also surveyed. Some interesting properties and applications of supramolecular radical cages such as their unique spin-spin interactions and intriguing confinement effects in radical-mediated/catalyzed reactions are comprehensively discussed and highlighted in the main text. The purpose of this Perspective is to help students and researchers understand the development of supramolecular radical cages, and potentially to stimulate innovation and creativity and infuse new energy into the fields of traditional supramolecular chemistry and radical chemistry as well as supramolecular radical chemistry.
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Affiliation(s)
- Bin Huang
- Shanghai Key Laboratory of Green Chemistry and Chemical Processes, School of Chemistry and Molecular Engineering, East China Normal University 3663 N. Zhongshan Road Shanghai 200062 P. R. China
| | - Lijun Mao
- Shanghai Key Laboratory of Green Chemistry and Chemical Processes, School of Chemistry and Molecular Engineering, East China Normal University 3663 N. Zhongshan Road Shanghai 200062 P. R. China
| | - Xueliang Shi
- Shanghai Key Laboratory of Green Chemistry and Chemical Processes, School of Chemistry and Molecular Engineering, East China Normal University 3663 N. Zhongshan Road Shanghai 200062 P. R. China
| | - Hai-Bo Yang
- Shanghai Key Laboratory of Green Chemistry and Chemical Processes, School of Chemistry and Molecular Engineering, East China Normal University 3663 N. Zhongshan Road Shanghai 200062 P. R. China
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30
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Mansoor IF, Dutton KG, Rothschild DA, Remsing RC, Lipke MC. Uptake, Trapping, and Release of Organometallic Cations by Redox-Active Cationic Hosts. J Am Chem Soc 2021; 143:16993-17003. [PMID: 34596386 DOI: 10.1021/jacs.1c06121] [Citation(s) in RCA: 13] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
The host-guest chemistry of metal-organic nanocages is typically driven by thermodynamically favorable interactions with their guests such that uptake and release of guests can be controlled by switching this affinity on or off. Herein, we achieve this effect by reducing porphyrin-walled cationic nanoprisms 1a12+ and 1b12+ to zwitterionic states that rapidly uptake organometallic cations Cp*2Co+ and Cp2Co+, respectively. Cp*2Co+ binds strongly (Ka = 1.3 × 103 M-1) in the neutral state 1a0 of host 1a12+, which has its three porphyrin walls doubly reduced and its six (bipy)Pt2+ linkers singly reduced (bipy = 2,2'-bipyridine). The less-reduced states of the host 1a3+ and 1a9+ also bind Cp*2Co+, though with lower affinities. The smaller Cp2Co+ cation binds strongly (Ka = 1.7 × 103 M-1) in the 3e- reduced state 1b9+ of the (tmeda)Pt2+-linked host 1b12+ (tmeda = N,N,N',N'-tetramethylethylenediamine). Upon reoxidation of the hosts with Ag+, the guests become trapped to provide unprecedented metastable cation-in-cation complexes Cp*2Co+@1a12+ and Cp2Co+@1b12+ that persist for >1 month. Thus, dramatic kinetic effects reveal a way to confine the guests in thermodynamically unfavorable environments. Experimental and DFT studies indicate that PF6- anions kinetically stabilize Cp*2Co+@1a12+ through electrostatic interactions and by influencing conformational changes of the host that open and close its apertures. However, when Cp*2Co+@1a12+ was prepared using ferrocenium (Fc+) instead of Ag+ to reoxidize the host, dissociation was accelerated >200× even though neither Fc+ nor Fc have any observable affinity for 1a12+. This finding shows that metastable host-guest complexes can respond to subtler stimuli than those required to induce guest release from thermodynamically favorable complexes.
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Affiliation(s)
- Iram F Mansoor
- Department of Chemistry and Chemical Biology, Rutgers, The State University of New Jersey, 123 Bevier Road, Piscataway, New Jersey 08854, United States
| | - Kaitlyn G Dutton
- Department of Chemistry and Chemical Biology, Rutgers, The State University of New Jersey, 123 Bevier Road, Piscataway, New Jersey 08854, United States
| | - Daniel A Rothschild
- Department of Chemistry and Chemical Biology, Rutgers, The State University of New Jersey, 123 Bevier Road, Piscataway, New Jersey 08854, United States
| | - Richard C Remsing
- Department of Chemistry and Chemical Biology, Rutgers, The State University of New Jersey, 123 Bevier Road, Piscataway, New Jersey 08854, United States
| | - Mark C Lipke
- Department of Chemistry and Chemical Biology, Rutgers, The State University of New Jersey, 123 Bevier Road, Piscataway, New Jersey 08854, United States
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31
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Rotthowe N, Linseis M, Vogelsang L, Orth N, Ivanović-Burmazović I, Winter RF. A "Pretender" Croconate-Bridged Macrocyclic Tetraruthenium Complex: Sizable Redox Potential Splittings despite Electronically Insulated Divinylphenylene Diruthenium Entities. Molecules 2021; 26:molecules26175232. [PMID: 34500666 PMCID: PMC8433806 DOI: 10.3390/molecules26175232] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/27/2021] [Revised: 08/24/2021] [Accepted: 08/24/2021] [Indexed: 11/17/2022] Open
Abstract
Careful optimization of the reaction conditions provided access to the particularly small tetraruthenium macrocycle 2Ru2Ph-Croc, which is composed out of two redox-active divinylphenylene-bridged diruthenium entities {Ru}-1,4-CH=CH-C6H4-CH=CH-{Ru} (Ru2Ph; {Ru} = Ru(CO)Cl(PiPr3)2) and two likewise redox-active and potentially non-innocent croconate linkers. According to single X-ray diffraction analysis, the central cavity of 2Ru2Ph-Croc is shielded by the bulky PiPr3 ligands, which come into close contact. Cyclic voltammetry revealed two pairs of split anodic waves in the weakly ion pairing CH2Cl2/NBu4BArF24 (BArF24 = [B{C6H3(CF3)2-3,5}4]− electrolyte, while the third and fourth waves fall together in CH2Cl2/NBu4PF6. The various oxidized forms were electrogenerated and scrutinized by IR and UV/Vis/NIR spectroscopy. This allowed us to assign the individual oxidations to the metal-organic Ru2Ph entities within 2Ru2Ph-Croc, while the croconate ligands remain largely uninvolved. The lack of specific NIR bands that could be assigned to intervalence charge transfer (IVCT) in the mono- and trications indicates that these mixed-valent species are strictly charge-localized. 2Ru2Ph-Croc is hence an exemplary case, where stepwise IR band shifts and quite sizable redox splittings between consecutive one-electron oxidations would, on first sight, point to electronic coupling, but are exclusively due to electrostatic and inductive effects. This makes 2Ru2Ph-Croc a true “pretender”.
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Affiliation(s)
- Nils Rotthowe
- Fachbereich Chemie der Universität Konstanz, Universitätsstraße 31, 78464 Konstanz, Germany; (N.R.); (M.L.); (L.V.)
- Department of Chemistry, University of Southern California, LJS 251, 840 Downey Way, Los Angeles, CA 90089, USA
| | - Michael Linseis
- Fachbereich Chemie der Universität Konstanz, Universitätsstraße 31, 78464 Konstanz, Germany; (N.R.); (M.L.); (L.V.)
| | - Lars Vogelsang
- Fachbereich Chemie der Universität Konstanz, Universitätsstraße 31, 78464 Konstanz, Germany; (N.R.); (M.L.); (L.V.)
| | - Nicole Orth
- Department Chemie und Pharmazie, Friedrich-Alexander-Universität Erlangen-Nürnberg, Egerlandstraße 1, 91058 Erlangen, Germany; (N.O.); (I.I.-B.)
| | - Ivana Ivanović-Burmazović
- Department Chemie und Pharmazie, Friedrich-Alexander-Universität Erlangen-Nürnberg, Egerlandstraße 1, 91058 Erlangen, Germany; (N.O.); (I.I.-B.)
- Department Chemie, Ludwigs-Maximilians-Universität München, Butenandtstr. 5-13, Haus D, 81377 München, Germany
| | - Rainer F. Winter
- Fachbereich Chemie der Universität Konstanz, Universitätsstraße 31, 78464 Konstanz, Germany; (N.R.); (M.L.); (L.V.)
- Correspondence: ; Tel.: +49-(7531)-88-5355
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32
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Rajasekar P, Swain A, Rajaraman G, Boomishankar R. Enantiopure Polyradical Tetrahedral Pd 12 L 6 Cages. Chemistry 2021; 27:10012-10015. [PMID: 33978271 DOI: 10.1002/chem.202101239] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/07/2021] [Indexed: 11/08/2022]
Abstract
The synthesis of cages with a polyradical framework remains a challenging task. Herein is reported an enantiomeric pair of quinoid-bridged polyradical tetrahedral palladium(II) cages that are stabilized by an unusual dianionic diradical form (dhbq..2- ). These cages have been characterized by electron paramagnetic resonance and UV-visible spectroscopy, squid magnetometry and mass spectrometry. Single-crystal-derived X-ray investigations of the iso-structural cages built on fluoranilate linkers confirm the tetrahedral structure of the obtained radical cages. Theoretical calculations showed that the diradical state of the dhbq anions is more stable than the usual monoradical state. A weak ferromagnetic exchange between adjacent radical centers was observed in DFT studies.
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Affiliation(s)
- Prabhakaran Rajasekar
- Department of Chemistry, Indian Institute of Science Education and Research Pune, Pune, 411008, India
| | - Abinash Swain
- Department of Chemistry, Indian Institute of Technology, Bombay, Mumbai, 400076, India
| | - Gopalan Rajaraman
- Department of Chemistry, Indian Institute of Technology, Bombay, Mumbai, 400076, India
| | - Ramamoorthy Boomishankar
- Department of Chemistry, Indian Institute of Science Education and Research Pune, Pune, 411008, India.,Centre for Energy Science, Indian Institute of Science Education and Research Pune, Dr. Homi Bhabha Road, Pune, 411008, India
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33
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Yoshimura A, Misaki Y. Periphery Modification of Tetrathiafulvalenes: Recent Development and Applications. CHEM REC 2021; 21:3520-3531. [PMID: 34086402 DOI: 10.1002/tcr.202100107] [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: 03/31/2021] [Revised: 05/13/2021] [Accepted: 05/14/2021] [Indexed: 12/17/2022]
Abstract
Tetrathiafulvalene (TTF) and its analogs are fascinating molecules in materials science based on their excellent electron-donating abilities. This personal account describes recent advances in the synthesis of TTF analogs for functional materials via the palladium-catalyzed modification of peripheries of TTF analogs. We first consider three types of molecules: fluorophore-TTF hybrid molecules, multi-redox systems, and an organic ligand for metal-organic frameworks. These molecules were successfully synthesized via Stille coupling or palladium-catalyzed direct C-H arylation and their structural, electrochemical, and optical properties were clarified. Subsequently, phosphorus-substituted TTF analogs were successfully synthesized for future applications of redox-active phosphine ligands for metal catalysts. The development of these molecules can significantly affect the advancement of chemical science.
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Affiliation(s)
- Aya Yoshimura
- Department of Applied Chemistry, Graduate School of Science and Engineering/ Research Unit for Power Generation and Storage Materials, Ehime University, 3 Bunkyo-cho, Matsuyama, 790-8577, Japan
| | - Yohji Misaki
- Department of Applied Chemistry, Graduate School of Science and Engineering/ Research Unit for Power Generation and Storage Materials, Ehime University, 3 Bunkyo-cho, Matsuyama, 790-8577, Japan.,Research Unit for Development of Organic Superconductors, Ehime University, 2-5 Bunkyo-cho, Matsuyama, 790-8577, Japan
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34
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Wu T, Jiang Z, Xue X, Wang SC, Chen M, Wang J, Liu H, Yan J, Chan YT, Wang P. Molecular hexagram and octagram: Position determined 3D metallo-supermolecules and concentration-induced transformation. CHINESE CHEM LETT 2021. [DOI: 10.1016/j.cclet.2021.01.052] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
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35
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Pullen S, Tessarolo J, Clever GH. Increasing structural and functional complexity in self-assembled coordination cages. Chem Sci 2021; 12:7269-7293. [PMID: 34163819 PMCID: PMC8171321 DOI: 10.1039/d1sc01226f] [Citation(s) in RCA: 162] [Impact Index Per Article: 54.0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/01/2021] [Accepted: 04/26/2021] [Indexed: 12/18/2022] Open
Abstract
Progress in metallo-supramolecular chemistry creates potential to synthesize functional nano systems and intelligent materials of increasing complexity. In the past four decades, metal-mediated self-assembly has produced a wide range of structural motifs such as helicates, grids, links, knots, spheres and cages, with particularly the latter ones catching growing attention, owing to their nano-scale cavities. Assemblies serving as hosts allow application as selective receptors, confined reaction environments and more. Recently, the field has made big steps forward by implementing dedicated functionality, e.g. catalytic centres or photoswitches to allow stimuli control. Besides incorporation in homoleptic systems, composed of one type of ligand, desire arose to include more than one function within the same assembly. Inspiration comes from natural enzymes that congregate, for example, a substrate recognition site, an allosteric regulator element and a reaction centre. Combining several functionalities without creating statistical mixtures, however, requires a toolbox of sophisticated assembly strategies. This review showcases the implementation of function into self-assembled cages and devises strategies to selectively form heteroleptic structures. We discuss first examples resulting from a combination of both principles, namely multicomponent multifunctional host-guest complexes, and their potential in application in areas such as sensing, catalysis, and photo-redox systems.
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Affiliation(s)
- Sonja Pullen
- Department of Chemistry and Chemical Biology, TU Dortmund University Otto-Hahn-Straße 6 44227 Dortmund Germany
- Homogeneous, Supramolecular and Bio-Inspired Catalysis, Van't Hoff Institute for Molecular Sciences, University of Amsterdam Science Park 904 1098 XH Amsterdam The Netherlands
| | - Jacopo Tessarolo
- Department of Chemistry and Chemical Biology, TU Dortmund University Otto-Hahn-Straße 6 44227 Dortmund Germany
| | - Guido H Clever
- Department of Chemistry and Chemical Biology, TU Dortmund University Otto-Hahn-Straße 6 44227 Dortmund Germany
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36
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Akine S. Control of guest binding behavior of metal-containing host molecules by ligand exchange. Dalton Trans 2021; 50:4429-4444. [PMID: 33877165 DOI: 10.1039/d1dt00048a] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
This review describes the control of guest binding behavior of metal-containing host molecules that is driven by ligand exchange reactions at the metal centers. Recently, a vast number of metal-containing host molecules including metal-assisted self-assembled structures have been developed, and the structural transformation after construction of the host framework has now been of interest from the viewpoint of functional switching and tuning. Among the various kinds of chemical transformations, ligand exchange has a great advantage in the structural conversions of metal-containing hosts, because ligand exchange usually proceeds under mild conditions that do not affect the host framework. In this review, the structural transformations are classified into three types: (1) weak-link approach, (2) subcomponent substitution, and (3) post-metalation modification, according to the type of coordination motif. The control of their guest binding behavior by the structural transformations is discussed in detail.
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Affiliation(s)
- Shigehisa Akine
- Nano Life Science Institute (WPI-NanoLSI), Kanazawa University, Kakuma-machi, Kanazawa 920-1192, Japan.
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37
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Li RJ, Tessarolo J, Lee H, Clever GH. Multi-stimuli Control over Assembly and Guest Binding in Metallo-supramolecular Hosts Based on Dithienylethene Photoswitches. J Am Chem Soc 2021; 143:3865-3873. [PMID: 33673736 PMCID: PMC7975281 DOI: 10.1021/jacs.0c12188] [Citation(s) in RCA: 74] [Impact Index Per Article: 24.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/02/2023]
Abstract
![]()
It is difficult to
assemble multi-component metallo-supramolecular
architectures in a non-statistical fashion, which limits their development
toward functional materials. Herein, we report a system of interconverting
bowls and cages that are able to respond to various selective stimuli
(light, ligands, anions), based on the self-assembly of a photochromic
dithienylethene (DTE) ligand, La, with PdII cations. By combining the concept of “coordination
sphere engineering”, relying on bulky quinoline donors, with
reversible photoswitching between the ligand’s open (o-La) and closed (c-La) forms, a [Pd2(o-La)4] cage (o-C) and a [Pd2(c-La)3] bowl (c-B) were obtained,
respectively. This structural rearrangement modulates the system’s
guest uptake capabilities. Among three bis-sulfonate guests (G1, G2, and G3), the cage can encapsulate
only the smallest (G1), while the bowl binds all of them.
Bowl c-B was further used to synthesize
a series of heteroleptic cages, [Pd2LA3LB], representing a motif never reported before. Additional
ligands (Lc-f), with short
or long arms, tune the cavity size, thus enabling or preventing guest
uptake. Addition of Br–/Ag+ makes it
possible to change the overall charge, again triggering guest uptake
and release, as well as fourth ligand de-/recomplexation. In combination,
site-selective introduction of functionality and application of external
stimuli lead to an intricate system of hosts with different guest
preferences. A high degree of complexity is achieved through cooperativity
between only a few components.
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Affiliation(s)
- Ru-Jin Li
- Faculty of Chemistry & Chemical Biology, TU Dortmund University, Otto-Hahn-Straße 6, 44227 Dortmund, Germany
| | - Jacopo Tessarolo
- Faculty of Chemistry & Chemical Biology, TU Dortmund University, Otto-Hahn-Straße 6, 44227 Dortmund, Germany
| | - Haeri Lee
- Faculty of Chemistry & Chemical Biology, TU Dortmund University, Otto-Hahn-Straße 6, 44227 Dortmund, Germany
| | - Guido H Clever
- Faculty of Chemistry & Chemical Biology, TU Dortmund University, Otto-Hahn-Straße 6, 44227 Dortmund, Germany
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38
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Goeb S, Sallé M. Electron-rich Coordination Receptors Based on Tetrathiafulvalene Derivatives: Controlling the Host-Guest Binding. Acc Chem Res 2021; 54:1043-1055. [PMID: 33528243 DOI: 10.1021/acs.accounts.0c00828] [Citation(s) in RCA: 38] [Impact Index Per Article: 12.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Abstract
The coordination-driven self-assembly methodology has emerged over the last few decades as an extraordinarily versatile synthetic tool for obtaining discrete macrocyclic or cage structures. Rational approaches using large libraries of ligands and metal complexes have allowed researchers to reach more and more sophisticated discrete structures such as interlocked, chiral, or heteroleptic cages, and some of them are designed for guest binding applications. Efforts have been notably produced in controlling host-guest affinity with, in particular, an evident interest in targeting substrate transportation and subsequent delivering. Recent accomplishments in this direction were described from functional cages which can be addressed with light, pH, or through a chemical exchange. The case of a redox-stimulation has been much less explored. In this case, the charge state of the redox-active cavity can be controlled through an applied electrical potential or introduction of an appropriate oxidizing/reducing chemical agent. Beyond possible applications in electrochemical sensing for environmental and medical sciences as well as for redox catalysis, controlling the cavity charge offers the possibility to modulate the host-guest binding affinity through electrostatic interactions, up to the point of disassembly of the host-guest complex, i.e., releasing of the guest molecule from the host cavity.This Account highlights the key studies that we carried out at Angers, related to discrete redox-active coordination-based architectures (i.e., metalla-rings, -cages, and -tweezers). These species are built upon metal-driven self-assembly between electron-rich ligands, based on the tetrathiafulvalene (TTF) moiety (as well as some of its S-rich derivatives), and various metal complexes. Given the high π-donating character of those ligands, the corresponding host structures exhibit a high electronic density on the cavity panels. This situation is favorable to bind complementary electron-poor guests, as it was illustrated with bis(pyrrolo)tetrathiafulvalene (BPTTF)-based cavities, which exhibit hosting properties for C60 or tetrafluorotetracyanoquinodimethane (TCNQ-F4). In addition to the pristine tetrathiafulvalene, which was successfully incorporated into palladium- or ruthenium-based architectures, the case of the so-called extended tetrathiafulvalene (exTTF) appears particularly fascinating. A series of related polycationic and neutral M4L2 ovoid containers, as well as a M6L3 cage, were synthesized, and their respective binding abilities for neutral and anionic guests were studied. Remarkably, such structures allow to control of the binding of the guest upon a redox-stimulation, through two distinctive processes: (i) cage disassembling or (ii) guest displacement. As an extension of this approach, metalla-assembled electron-rich tweezers were designed, which are able to trigger the guest release through an original process based on supramolecular dimerization activated through a redox stimulus. This ensemble of results illustrates the remarkable ability of electron-rich, coordination-based self-assembled cavities to bind various types of guests and, importantly, to trigger their release through a redox-stimulus.
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Affiliation(s)
- Sébastien Goeb
- Univ Angers, CNRS, MOLTECH-Anjou, SFR MATRIX, 2 bd Lavoisier, F-49000 Angers, France
| | - Marc Sallé
- Univ Angers, CNRS, MOLTECH-Anjou, SFR MATRIX, 2 bd Lavoisier, F-49000 Angers, France
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39
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Agnes M, Arabi A, Caricato M, Nitti A, Dondi D, Yannakopoulou K, Patrini M, Pasini D. Helical Nanofibers Formed by Palladium-Mediated Assembly of Organic Homochiral Macrocycles Containing Binaphthyl and Pyridyl Units. Chempluschem 2021; 86:270-274. [PMID: 33565730 DOI: 10.1002/cplu.202100039] [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: 01/25/2021] [Revised: 02/04/2021] [Indexed: 11/05/2022]
Abstract
Herein, we report the synthesis and characterization of homochiral macrocycles, in which molecular rigidity, combined with the presence of multiple functional groups, allow for the assembly of helical nanostructures. 1,1'-bi-2-naphthol (Binol) units are used as robust chirality inducers, and pyridyl units embedded within the molecular frameworks allow the assembly, upon coordination with Pd(II) metal ions, of the macrocyclic building blocks. CD and NMR spectroscopies show the formation of ordered 1D assembly in solution. AFM studies indicate that the molecular systems are capable of forming nanoscale structures. The effective transfer of chiral information results in helical nanofibers, with lengths ranging from a few hundreds of nanometers to some micrometers. AFM line profiles reveal a helical longitudinal period of about 50 nm and a transverse width of 25 to 45 nm after deconvolution.
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Affiliation(s)
- Marco Agnes
- Department of Chemistry and INSTM Research Unit, University of Pavia, Via Taramelli 12, 27100, Pavia, Italy.,Institute of Nanoscience and Nanotechnology, National Center for Scientific Research "Demokritos", Patr. Grigoriou E' & 27 Neapoleos str., 15341, Agia Paraskevi, Greece
| | - Ameneh Arabi
- Department of Chemistry and INSTM Research Unit, University of Pavia, Via Taramelli 12, 27100, Pavia, Italy
| | - Marco Caricato
- Department of Chemistry and INSTM Research Unit, University of Pavia, Via Taramelli 12, 27100, Pavia, Italy
| | - Andrea Nitti
- Department of Chemistry and INSTM Research Unit, University of Pavia, Via Taramelli 12, 27100, Pavia, Italy
| | - Daniele Dondi
- Department of Chemistry and INSTM Research Unit, University of Pavia, Via Taramelli 12, 27100, Pavia, Italy
| | - Konstantina Yannakopoulou
- Institute of Nanoscience and Nanotechnology, National Center for Scientific Research "Demokritos", Patr. Grigoriou E' & 27 Neapoleos str., 15341, Agia Paraskevi, Greece
| | - Maddalena Patrini
- Department of Physics, University of Pavia, Via Bassi 6, 27100, Pavia, Italy
| | - Dario Pasini
- Department of Chemistry and INSTM Research Unit, University of Pavia, Via Taramelli 12, 27100, Pavia, Italy
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40
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Dekhtiarenko M, Allain M, Carré V, Aubriet F, Voitenko Z, Sallé M, Goeb S. Comparing the self-assembly processes of two redox-active exTTF-based regioisomer ligands. NEW J CHEM 2021. [DOI: 10.1039/d1nj04555e] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A new exTTF-based ligand was synthesized and its coordination-driven self-assembly behavior with a square planar palladium complex was compared with a previously described regioisomer.
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Affiliation(s)
- Maksym Dekhtiarenko
- Univ Angers, CNRS, MOLTECH-Anjou, 2 bd Lavoisier, F-49045 Angers, France
- Taras Shevchenko National University of Kyiv, 64/13 Volodymyrska st., Kyiv 01033, Ukraine
| | - Magali Allain
- Univ Angers, CNRS, MOLTECH-Anjou, 2 bd Lavoisier, F-49045 Angers, France
| | - Vincent Carré
- LCP-A2MC, FR 3624, Université de Lorraine, ICPM, 1 Bd Arago, 57078 Metz Cedex 03, France
| | - Frédéric Aubriet
- LCP-A2MC, FR 3624, Université de Lorraine, ICPM, 1 Bd Arago, 57078 Metz Cedex 03, France
| | - Zoia Voitenko
- Taras Shevchenko National University of Kyiv, 64/13 Volodymyrska st., Kyiv 01033, Ukraine
| | - Marc Sallé
- Univ Angers, CNRS, MOLTECH-Anjou, 2 bd Lavoisier, F-49045 Angers, France
| | - Sébastien Goeb
- Univ Angers, CNRS, MOLTECH-Anjou, 2 bd Lavoisier, F-49045 Angers, France
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41
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Krykun S, Croué V, Alévêque O, Levillain E, Allain M, Mézière C, Carré V, Aubriet F, Voïtenko Z, Goeb S, Sallé M. A self-assembled tetrathiafulvalene box. Org Chem Front 2021. [DOI: 10.1039/d0qo01543a] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Abstract
A M8L2 metalla-cage constructed through coordination-driven self-assembly from a quinonato bis-ruthenium complex and an electron-rich tetrathiafulvalene (TTF) tetrapyridyl ligand is depicted.
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Affiliation(s)
| | | | | | | | | | | | - Vincent Carré
- LCP-A2MC
- FR 3624
- Université de Lorraine
- ICPM
- 57078 Metz Cedex 03
| | | | - Zoia Voïtenko
- Taras Shevchenko National University of Kyiv
- Kyiv 01033
- Ukraine
| | | | - Marc Sallé
- Univ Angers
- CNRS
- MOLTECH-ANJOU
- F-49000 Angers
- France
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42
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Zanetti‐Polzi L, Djemili R, Durot S, Heitz V, Daidone I, Ventura B. Allosteric Control of Naphthalene Diimide Encapsulation and Electron Transfer in Porphyrin Containers: Photophysical Studies and Molecular Dynamics Simulation. Chemistry 2020; 26:17514-17524. [DOI: 10.1002/chem.202003151] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/02/2020] [Revised: 08/24/2020] [Indexed: 12/20/2022]
Affiliation(s)
| | - Ryan Djemili
- Laboratoire de Synthèse des Assemblages Moléculaires Multifonctionnels Institut de Chimie de Strasbourg, CNRS/UMR 7177 Université de Strasbourg 4, rue Blaise Pascal 67000 Strasbourg France
| | - Stéphanie Durot
- Laboratoire de Synthèse des Assemblages Moléculaires Multifonctionnels Institut de Chimie de Strasbourg, CNRS/UMR 7177 Université de Strasbourg 4, rue Blaise Pascal 67000 Strasbourg France
| | - Valérie Heitz
- Laboratoire de Synthèse des Assemblages Moléculaires Multifonctionnels Institut de Chimie de Strasbourg, CNRS/UMR 7177 Université de Strasbourg 4, rue Blaise Pascal 67000 Strasbourg France
| | - Isabella Daidone
- Department of Physical and Chemical Sciences University of L'Aquila via Vetoio (Coppito 1) 67010 L'Aquila Italy
| | - Barbara Ventura
- Istituto per la Sintesi Organica e la Fotoreattività (ISOF) Consiglio Nazionale delle Ricerche (CNR) Via P. Gobetti 101 40129 Bologna Italy
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43
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Plessius R, Deij V, Reek JNH, van der Vlugt JI. Redox-Active Supramolecular Heteroleptic M 4 L 2 L' 2 Assemblies with Tunable Interior Binding Site. Chemistry 2020; 26:13241-13248. [PMID: 32428350 PMCID: PMC7693204 DOI: 10.1002/chem.202001416] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/22/2020] [Revised: 04/28/2020] [Indexed: 12/18/2022]
Abstract
Three Pt4 L2 L'2 heteroleptic rectangles (1-3), containing ditopic redox-active bis-pyridine functionalized perylene bisimide (PBI) ligands PBI-pyr2 (L) are reported. Co-ligand L' is a dicarboxylate spacer of varying length, leading to modified overall size of the assemblies. 1 H NMR spectroscopy reveals a trend in the splitting and upfield chemical shift of the PBI-hydrogens in the rectangles with respect to free PBI, most pronounced with the largest strut length (3) and least with the smallest strut length (1). This is attributed to increased rotational freedom of the PBI-pyr2 ligand over its longitudinal axis (Npy -Npy ), due to increased distance between the PBI-surfaces, which is corroborated by VT-NMR measurements and DFT calculations. The intramolecular motion entails desymmetrization of the two PBI-ligands, in line with cyclic voltammetry (CV) data. The first (overall two-electron) reduction event and re-oxidation for 1 display a subtle peak-to-peak splitting of 60 mV, whilst increased splitting of this event is observed for 2 and 3. The binding of pyrene in 1 is probed to establish proof of concept of host-guest chemistry enabled by the two PBI-motifs. Fitting the binding curve obtained by 1 H NMR titration with a 1:1 complex formation model led to a binding constant of 964±55 m-1 . Pyrene binding is shown to directly influence the redox-chemistry of 1, resulting in a cathodic and anodic shift of approximately 46 mV on the first and second reduction event, respectively.
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Affiliation(s)
- Raoul Plessius
- van't Hoff Institute for Molecular Sciences (HIMS)University of Amsterdam (UvA)Science Park 9041098 XHAmsterdamThe Netherlands
| | - Vera Deij
- van't Hoff Institute for Molecular Sciences (HIMS)University of Amsterdam (UvA)Science Park 9041098 XHAmsterdamThe Netherlands
| | - Joost N. H. Reek
- van't Hoff Institute for Molecular Sciences (HIMS)University of Amsterdam (UvA)Science Park 9041098 XHAmsterdamThe Netherlands
| | - Jarl Ivar van der Vlugt
- van't Hoff Institute for Molecular Sciences (HIMS)University of Amsterdam (UvA)Science Park 9041098 XHAmsterdamThe Netherlands
- Current address: Institute of ChemistryCarl von Ossietzky University OldenburgCarl-von-Ossietzky-Strasse 9–1126129OldenburgGermany
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Plajer AJ, Rizzuto FJ, von Krbek LKS, Gisbert Y, Martínez-Agramunt V, Nitschke JR. Oxidation triggers guest dissociation during reorganization of an Fe II 4L 6 twisted parallelogram. Chem Sci 2020; 11:10399-10404. [PMID: 34123180 PMCID: PMC8162311 DOI: 10.1039/d0sc04352d] [Citation(s) in RCA: 14] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/08/2020] [Accepted: 09/09/2020] [Indexed: 12/12/2022] Open
Abstract
A three-dimensional FeII 4L6 parallelogram was prepared from ferrocene-containing ditopic ligands. The steric preference of the bulky ferrocene cores towards meridional vertex coordination brought about this new structure type, in which the ferrocene units adopt three distinct conformations. The structure possesses two distinct, bowl-like cavities that host anionic guests. Oxidation of the ferrocene FeII to ferrocenium FeIII causes rotation of the ferrocene hinges, converting the structure to an FeII 1L1 + species with release of anionic guests, even though the average charge per iron increases in a way that would ordinarily increase guest binding strength. The degrees of freedom exhibited by these new structures - derived from the different configurations of the three ligands surrounding a meridional FeII center and the rotation of ferrocene cores - thus underpin their ability to reconfigure and eject guests upon oxidation.
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Affiliation(s)
- Alex J Plajer
- Department of Chemistry, University of Cambridge Lensfield Rd Cambridge CB2 1EW UK
| | - Felix J Rizzuto
- Department of Chemistry, University of Cambridge Lensfield Rd Cambridge CB2 1EW UK
| | | | - Yohan Gisbert
- Department of Chemistry, University of Cambridge Lensfield Rd Cambridge CB2 1EW UK
| | | | - Jonathan R Nitschke
- Department of Chemistry, University of Cambridge Lensfield Rd Cambridge CB2 1EW UK
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45
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Iseki S, Nonomura K, Kishida S, Ogata D, Yuasa J. Zinc-Ion-Stabilized Charge-Transfer Interactions Drive Self-Complementary or Complementary Molecular Recognition. J Am Chem Soc 2020; 142:15842-15851. [PMID: 32786739 DOI: 10.1021/jacs.0c05940] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/04/2023]
Abstract
Here, we show that charge-transfer interactions determine whether donor and acceptor ditopic ligands will associate in a complementary or self-complementary fashion upon metal-ion clipping. Anthracene-based (9,10LD and 1,5LD) and anthraquinone-based (1,5LA) ditopic ligands containing two imidazole side arms as zinc coordination sites were designed. The 9,10LD and 1,5LA systems associated in a complementary fashion (LA/LD/LA) upon clipping by two zinc ions (Zn2+) to form an alternating donor-acceptor assembly [(9,10LD)(1,5LA)2-(Zn2+)2]. However, once the charge-transfer interactions were perturbed by subtle modifications of the imidazole side arms (9,10LD'(S) and 1,5LA'(S)), self-complementary association (LD'/LD'/LD'/LD' and LA'/LA'/LA'/LA') between the donor (9,10LD'(S)) and acceptor (1,5LA'(S)) ligands predominantly occurred to form homoassemblies [(9,10LD'(S))4-(Zn2+)2 and (1,5LA'(S))4-(Zn2+)2]. As in the case of a homochiral pair (9,10LD'(S) and 1,5LA'(S)), self-complementary association (narcissistic self-sorting) occurred in the Zn2+ assembly with heterochiral combinations of the donor and acceptor ligands (9,10LD'(S)/1,5LA'(R) and 9,10LD'(S)/1,5LA'(R)/1,5LA'(R)). Narcissistic self-sorting also took place between the positional isomer of the donor ligands (9,10LD and 1,5LD) to form individual homoligand assemblies [(9,10LD)4-(Zn2+)2 and (1,5LD)4-(Zn2+)2]. Conversely, statistical association took place in the Zn2L4 assembly process of an isomorphous pair of the donor and acceptor ligands (1,5LD and 1,5LA).
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Affiliation(s)
- Shuta Iseki
- Department of Applied Chemistry, Tokyo University of Science, 1-3 Kagurazaka, Shinjuku-ku, Tokyo 162-8601, Japan
| | - Kohei Nonomura
- Department of Applied Chemistry, Tokyo University of Science, 1-3 Kagurazaka, Shinjuku-ku, Tokyo 162-8601, Japan
| | - Sakura Kishida
- Department of Applied Chemistry, Tokyo University of Science, 1-3 Kagurazaka, Shinjuku-ku, Tokyo 162-8601, Japan
| | - Daiji Ogata
- Department of Applied Chemistry, Tokyo University of Science, 1-3 Kagurazaka, Shinjuku-ku, Tokyo 162-8601, Japan
| | - Junpei Yuasa
- Department of Applied Chemistry, Tokyo University of Science, 1-3 Kagurazaka, Shinjuku-ku, Tokyo 162-8601, Japan
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46
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Dutton KG, Rothschild DA, Pastore DB, Emge TJ, Lipke MC. The Influence of Redox-Active Linkers on the Stability and Physical Properties of a Highly Electroactive Porphyrin Nanoprism. Inorg Chem 2020; 59:12616-12624. [DOI: 10.1021/acs.inorgchem.0c01719] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Affiliation(s)
- Kaitlyn G. Dutton
- Department of Chemistry and Chemical Biology, Rutgers, The State University of New Jersey, 123 Bevier Road, Piscataway, New Jersey 08854, United States
| | - Daniel A. Rothschild
- Department of Chemistry and Chemical Biology, Rutgers, The State University of New Jersey, 123 Bevier Road, Piscataway, New Jersey 08854, United States
| | - Dakota B. Pastore
- Department of Chemistry and Chemical Biology, Rutgers, The State University of New Jersey, 123 Bevier Road, Piscataway, New Jersey 08854, United States
| | - Thomas J. Emge
- Department of Chemistry and Chemical Biology, Rutgers, The State University of New Jersey, 123 Bevier Road, Piscataway, New Jersey 08854, United States
| | - Mark C. Lipke
- Department of Chemistry and Chemical Biology, Rutgers, The State University of New Jersey, 123 Bevier Road, Piscataway, New Jersey 08854, United States
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Yan P, Zhao W, Zhang B, Jiang L, Petcher S, Smith JA, Parker DJ, Cooper AI, Lei J, Hasell T. Inverse Vulcanized Polymers with Shape Memory, Enhanced Mechanical Properties, and Vitrimer Behavior. Angew Chem Int Ed Engl 2020; 59:13371-13378. [PMID: 32383492 PMCID: PMC7497146 DOI: 10.1002/anie.202004311] [Citation(s) in RCA: 38] [Impact Index Per Article: 9.5] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/24/2020] [Revised: 05/07/2020] [Indexed: 01/12/2023]
Abstract
The invention of inverse vulcanization provides great opportunities for generating functional polymers directly from elemental sulfur, an industrial by-product. However, unsatisfactory mechanical properties have limited the scope for wider applications of these exciting materials. Here, we report an effective synthesis method that significantly improves mechanical properties of sulfur-polymers and allows control of performance. A linear pre-polymer containing hydroxyl functional group was produced, which could be stored at room temperature for long periods of time. This pre-polymer was then further crosslinked by difunctional isocyanate secondary crosslinker. By adjusting the molar ratio of crosslinking functional groups, the tensile strength was controlled, ranging from 0.14±0.01 MPa to 20.17±2.18 MPa, and strain was varied from 11.85±0.88 % to 51.20±5.75 %. Control of hardness, flexibility, solubility and function of the material were also demonstrated. We were able to produce materials with suitable combination of flexibility and strength, with excellent shape memory function. Combined with the unique dynamic property of S-S bonds, these polymer networks have an attractive, vitrimer-like ability for being reshaped and recycled, despite their crosslinked structures. This new synthesis method could open the door for wider applications of sustainable sulfur-polymers.
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Affiliation(s)
- Peiyao Yan
- Department of ChemistryUniversity of LiverpoolCrown StreetLiverpoolL69 7ZDUK
| | - Wei Zhao
- Department of ChemistryUniversity of LiverpoolCrown StreetLiverpoolL69 7ZDUK
- Leverhulme Research Centre for Functional Materials Design and Materials Innovation FactoryUniversity of LiverpoolOxford StreetLiverpoolL7 3NYUK
| | - Bowen Zhang
- Department of ChemistryUniversity of LiverpoolCrown StreetLiverpoolL69 7ZDUK
| | - Liang Jiang
- State Key Laboratory of Polymer Materials EngineeringPolymer Research InstituteSichuan UniversityChengdu610065China
| | - Samuel Petcher
- Department of ChemistryUniversity of LiverpoolCrown StreetLiverpoolL69 7ZDUK
| | - Jessica A. Smith
- Department of ChemistryUniversity of LiverpoolCrown StreetLiverpoolL69 7ZDUK
| | - Douglas J. Parker
- Department of ChemistryUniversity of LiverpoolCrown StreetLiverpoolL69 7ZDUK
| | - Andrew I. Cooper
- Department of ChemistryUniversity of LiverpoolCrown StreetLiverpoolL69 7ZDUK
- Leverhulme Research Centre for Functional Materials Design and Materials Innovation FactoryUniversity of LiverpoolOxford StreetLiverpoolL7 3NYUK
| | - Jingxin Lei
- State Key Laboratory of Polymer Materials EngineeringPolymer Research InstituteSichuan UniversityChengdu610065China
| | - Tom Hasell
- Department of ChemistryUniversity of LiverpoolCrown StreetLiverpoolL69 7ZDUK
- College of Chemistry and Chemical EngineeringGansu International Scientific and Technological Cooperation Base of Water-Retention Chemical Functional MaterialsNorthwest Normal UniversityLanzhou730070China
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48
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Fink D, Orth N, Linseis M, Ivanović‐Burmazović I, Winter RF. Structural Versatility and Supramolecular Isomerism in Redox‐Active Tetra‐ and Hexaruthenium Macrocycles. Eur J Inorg Chem 2020. [DOI: 10.1002/ejic.202000387] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
Affiliation(s)
- Daniel Fink
- Fachbereich Chemie Universität Konstanz Universitätsstraße 10 78457 Konstanz Germany
| | - Nicole Orth
- Department Chemie und Pharmazie Friedrich‐Alexander‐Universität Erlangen‐Nürnberg Egerlandstraße 1 91058 Erlangen Germany
| | - Michael Linseis
- Fachbereich Chemie Universität Konstanz Universitätsstraße 10 78457 Konstanz Germany
| | - Ivana Ivanović‐Burmazović
- Department Chemie und Pharmazie Friedrich‐Alexander‐Universität Erlangen‐Nürnberg Egerlandstraße 1 91058 Erlangen Germany
| | - Rainer F. Winter
- Fachbereich Chemie Universität Konstanz Universitätsstraße 10 78457 Konstanz Germany
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49
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Takata H, Ono K, Iwasawa N. Controlled release of the guest molecule via borate formation of a fluorinated boronic ester cage. Chem Commun (Camb) 2020; 56:5613-5616. [PMID: 32297611 DOI: 10.1039/d0cc01441a] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Abstract
A boronic ester cage, which exhibits stimuli-responsive guest-release behavior, was constructed by self-assembly of tetrol with the indacene backbone and a fluorine-substituted benzenetriboronic acid derivative. The presence of fluorine substituents made it possible to control the guest release rate using simple amines by forming tetrahedral borates.
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Affiliation(s)
- Hisatsugu Takata
- Department of Chemistry, Tokyo Institute of Technology, O-okayama, Meguro-ku, Tokyo 152-8551, Japan.
| | - Kosuke Ono
- Department of Chemistry, Tokyo Institute of Technology, O-okayama, Meguro-ku, Tokyo 152-8551, Japan.
| | - Nobuharu Iwasawa
- Department of Chemistry, Tokyo Institute of Technology, O-okayama, Meguro-ku, Tokyo 152-8551, Japan.
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50
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Sakata Y, Okada M, Tamiya M, Akine S. Post‐Metalation Modification of a Macrocyclic Dicobalt(III) Metallohost by Site‐Selective Ligand Exchange for Guest Recognition Control. Chemistry 2020; 26:7595-7601. [DOI: 10.1002/chem.202001072] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/29/2020] [Revised: 04/01/2020] [Indexed: 12/31/2022]
Affiliation(s)
- Yoko Sakata
- Graduate School of Natural Science and TechnologyKanazawa University Kakuma-machi Kanazawa 920-1192 Japan
- Nano Life Science Institute (WPI-NanoLSI)Kanazawa University Kakuma-machi Kanazawa 920-1192 Japan
| | - Masahiro Okada
- Graduate School of Natural Science and TechnologyKanazawa University Kakuma-machi Kanazawa 920-1192 Japan
| | - Munehiro Tamiya
- Graduate School of Natural Science and TechnologyKanazawa University Kakuma-machi Kanazawa 920-1192 Japan
| | - Shigehisa Akine
- Graduate School of Natural Science and TechnologyKanazawa University Kakuma-machi Kanazawa 920-1192 Japan
- Nano Life Science Institute (WPI-NanoLSI)Kanazawa University Kakuma-machi Kanazawa 920-1192 Japan
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