1
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Manna U, Das G. Positional isomeric effect of acyclic hosts on supramolecular recognition of anionic guests. Coord Chem Rev 2021. [DOI: 10.1016/j.ccr.2021.213931] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
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2
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Baulina TV, Kudryavtsev IY, Artem’ev AV, Bagryanskaya IY, Pasechnik MP, Brel VK. Synthesis, Molecular, and Crystal Structure of Tris(2-carbamoylmethoxyphenyl)phosphine Oxide. RUSS J GEN CHEM+ 2020. [DOI: 10.1134/s1070363220100059] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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3
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Namashivaya SSR, Oshchepkov AS, Ding H, Förster S, Khrustalev VN, Kataev EA. Anthracene-Based Receptors with a Turn-on Fluorescence Response for Nitrate. Org Lett 2019; 21:8746-8750. [PMID: 31603329 DOI: 10.1021/acs.orglett.9b03361] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/04/2023]
Abstract
Herein we describe the design, synthesis, and anion binding properties of bicyclic receptors with two or three anthracenes, which show a turn-on fluorescence response in the presence of nitrate and chaotropic anions in a buffered aqueous solution. The receptor with two anthracenes binds nitrate with 103 M-1 affinity and stabilizes it in the inner cavity though electrostatic, hydrogen bonding, and anion-π interactions.
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Affiliation(s)
- Siva S R Namashivaya
- Institute of Chemistry , Technische Universität Chemnitz , 09107 Chemnitz , Germany
| | - Aleksandr S Oshchepkov
- Institute of Chemistry , Technische Universität Chemnitz , 09107 Chemnitz , Germany
- Peoples' Friendship University of Russia (RUDN University) , 6 Miklukho-Maklay Street , 117198 Moscow , Russia
| | - Hui Ding
- Institute of Chemistry , Technische Universität Chemnitz , 09107 Chemnitz , Germany
| | - Sebastian Förster
- Institut für Organische Chemie , Technische Universität Bergakademie Freiberg , Leipziger Strasse 29 , 09599 Freiberg , Germany
| | - Victor N Khrustalev
- Peoples' Friendship University of Russia (RUDN University) , 6 Miklukho-Maklay Street , 117198 Moscow , Russia
- National Research Center "Kurchatov Institute" , 1 Acad. Kurchatov Square , Moscow 123182 , Russia
| | - Evgeny A Kataev
- Institute of Chemistry , Technische Universität Chemnitz , 09107 Chemnitz , Germany
- Department of Chemistry and Pharmacy , University Erlangen-Nürnberg , Nikolaus-Fiebiger-Str. 10 , 91058 Erlangen , Germany
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4
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Baulina TV, Kudryavtsev IY, Smolyakov AF, Pasechnik MP, Brel VK. Synthesis and molecular structure of functionalized tris[2-(4′-substituted butoxyphenyl)]phosphine oxides as precursors of tripodal ligands. HETEROATOM CHEMISTRY 2018. [DOI: 10.1002/hc.21454] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Affiliation(s)
- Tat'yana V. Baulina
- Nesmeyanov Institute of Organoelement Compounds; Russian Academy of Sciences; Moscow Russia
| | - Igor Yu. Kudryavtsev
- Nesmeyanov Institute of Organoelement Compounds; Russian Academy of Sciences; Moscow Russia
| | - Alexander F. Smolyakov
- Nesmeyanov Institute of Organoelement Compounds; Russian Academy of Sciences; Moscow Russia
- Faculty of Science; RUDN University; Moscow Russia
| | - Margarita P. Pasechnik
- Nesmeyanov Institute of Organoelement Compounds; Russian Academy of Sciences; Moscow Russia
| | - Valery K. Brel
- Nesmeyanov Institute of Organoelement Compounds; Russian Academy of Sciences; Moscow Russia
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5
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Chang KC, Chen CY, Lin TP, Ku PJ, Chen CL, Wang CM, Lin HM, Tseng MC, Singh AS, Sun SS. Platinum(II)-directed Self-assembly Loop Complexes for Anion Recognition and Sensing. J CHIN CHEM SOC-TAIP 2017. [DOI: 10.1002/jccs.201700275] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Affiliation(s)
- Kai-Chi Chang
- Institute of Chemistry; Academia Sinica; Taipei 115 Taiwan
| | - Chan-Yu Chen
- Institute of Chemistry; Academia Sinica; Taipei 115 Taiwan
| | - Tzu-Pin Lin
- Institute of Chemistry; Academia Sinica; Taipei 115 Taiwan
| | - Po-Jen Ku
- Institute of Chemistry; Academia Sinica; Taipei 115 Taiwan
| | - Chun-Lin Chen
- Institute of Chemistry; Academia Sinica; Taipei 115 Taiwan
| | - Chih-Ming Wang
- Department of Life Sciences; National Ocean University; Keelung Taiwan
| | - Hsiu-Mei Lin
- Department of Life Sciences; National Ocean University; Keelung Taiwan
| | - Mei-Chun Tseng
- Institute of Chemistry; Academia Sinica; Taipei 115 Taiwan
| | | | - Shih-Sheng Sun
- Institute of Chemistry; Academia Sinica; Taipei 115 Taiwan
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6
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Gaurav A, Kumar R, Gupta H, Ravikumar K, Sridhar B, Tewari AK. Unprecedented folding in linker based flexible tripodal molecule and their conformational analysis. J Mol Struct 2017. [DOI: 10.1016/j.molstruc.2017.01.031] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/05/2023]
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7
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Singh AS, Tiwari RK, Lee MM, Behera JN, Sun SS, Chandrasekhar V. Structural Tuning of Anion-Templated Motifs with External Stimuli through Crystal-to-Crystal Transformation. Chemistry 2017; 23:762-766. [PMID: 27879018 DOI: 10.1002/chem.201604542] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/26/2016] [Indexed: 11/10/2022]
Abstract
Protonation of trans-1,2-bis(4-pyridyl)ethylene (4,4'-bpe) with dilute sulfuric acid (33 %) afforded a protonated adduct [{4,4'-bpe⋅2 H+ }2 {HSO4 }-2 {SO4 }-2 {H2 O}2 ] (1). The neighboring olefinic bond in 1 is in a suitable range (3.931-4.064 Å) to undergo a photochemical [2+2] cycloaddition reaction. Upon irradiation with UV light (365 nm), 1 undergoes a molecular sliding involving the 4,4'-bpe⋅2 H+ units, affording 2, stabilized through OSO4 ⋅⋅⋅π interactions. Heating 1 to 50° C leads to a 3D hydrogen-bonded organic framework (HOF) (3). This process occurs through thermal dissociation of the bisulfate anion. Diffusion of iodine through the crystal lattice of 1 and 3 enables the reduction of sulfate to bisulfate, affording a 1D hydrogen-bonded chain (4). Solid-state 13 C CPMAS NMR, IR, DSC, and powder XRD studies further support stimuli-responsive structural tuning through crystal-to-crystal transformation. All these conversions occur with significant translational and rotational movements along with a series of bond-breaking and bond-forming processes.
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Affiliation(s)
- Ashutosh S Singh
- School of Chemical Sciences, National Institute of Science Education and Research (NISER), Bhubaneswar, PO Jatni, Khurda, 752050, Odissa, India
| | - Ranjay K Tiwari
- School of Chemical Sciences, National Institute of Science Education and Research (NISER), Bhubaneswar, PO Jatni, Khurda, 752050, Odissa, India
| | - Mandy M Lee
- Institute of Chemistry, Academia Sinica, Nangang, 115, Taipei, Taiwan, ROC
| | - Jogendra N Behera
- School of Chemical Sciences, National Institute of Science Education and Research (NISER), Bhubaneswar, PO Jatni, Khurda, 752050, Odissa, India
| | - Shih-Sheng Sun
- Institute of Chemistry, Academia Sinica, Nangang, 115, Taipei, Taiwan, ROC
| | - V Chandrasekhar
- School of Chemical Sciences, National Institute of Science Education and Research (NISER), Bhubaneswar, PO Jatni, Khurda, 752050, Odissa, India
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8
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Yao H, Wang J, Chen H, Mei X, Su Z, Wu J, Lin Z, Ling Q. Solvent-dependent and highly selective anion sensing and molecular logic application of bisindolylmaleimide derivatives. RSC Adv 2017. [DOI: 10.1039/c6ra28367e] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
Bisindolylmaleimide derivatives (IMs) were found to be sensitive to different anions in various solvents, and utilized to construct five logic devices.
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Affiliation(s)
- Huimei Yao
- College of Materials Science and Engineering
- Fujian Key Laboratory of Polymer Materials
- Fujian Normal University
- Fuzhou 350007
- China
| | - Jingwei Wang
- College of Materials Science and Engineering
- Fujian Key Laboratory of Polymer Materials
- Fujian Normal University
- Fuzhou 350007
- China
| | - Huan Chen
- College of Chemistry and Chemical Engineering
- Fujian Normal University
- Fuzhou 350007
- China
| | - Xiaofei Mei
- College of Chemistry and Chemical Engineering
- Fujian Normal University
- Fuzhou 350007
- China
| | - Zhu Su
- College of Materials Science and Engineering
- Fujian Key Laboratory of Polymer Materials
- Fujian Normal University
- Fuzhou 350007
- China
| | - Jingnan Wu
- College of Materials Science and Engineering
- Fujian Key Laboratory of Polymer Materials
- Fujian Normal University
- Fuzhou 350007
- China
| | - Zhenghuan Lin
- College of Materials Science and Engineering
- Fujian Key Laboratory of Polymer Materials
- Fujian Normal University
- Fuzhou 350007
- China
| | - Qidan Ling
- College of Materials Science and Engineering
- Fujian Key Laboratory of Polymer Materials
- Fujian Normal University
- Fuzhou 350007
- China
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9
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Dey SK, Basu A, Chutia R, Das G. Anion coordinated capsules and pseudocapsules of tripodal amide, urea and thiourea scaffolds. RSC Adv 2016. [DOI: 10.1039/c6ra00268d] [Citation(s) in RCA: 39] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
This review provides a detailed and comparative account of the solid- and solution-states anion (halides and oxyanions) binding affinities of hydrogen bonding tripodal scaffolds.
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Affiliation(s)
| | - Arghya Basu
- Department of Chemistry
- Indian Institute of Technology Guwahati
- India
| | - Romen Chutia
- Department of Chemistry
- Indian Institute of Technology Guwahati
- India
| | - Gopal Das
- Department of Chemistry
- Indian Institute of Technology Guwahati
- India
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10
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Wang W, Wang YX, Yang HB. Supramolecular transformations within discrete coordination-driven supramolecular architectures. Chem Soc Rev 2016; 45:2656-93. [DOI: 10.1039/c5cs00301f] [Citation(s) in RCA: 432] [Impact Index Per Article: 54.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Abstract
In this review, a comprehensive summary of supramolecular transformations within discrete coordination-driven supramolecular architectures, including helices, metallacycles, metallacages, etc., is presented.
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Affiliation(s)
- Wei Wang
- Shanghai Key Laboratory of Green Chemistry and Chemical Processes
- Department of Chemistry
- East China Normal University
- Shanghai 200062
- P. R. China
| | - Yu-Xuan Wang
- Shanghai Key Laboratory of Green Chemistry and Chemical Processes
- Department of Chemistry
- East China Normal University
- Shanghai 200062
- P. R. China
| | - Hai-Bo Yang
- Shanghai Key Laboratory of Green Chemistry and Chemical Processes
- Department of Chemistry
- East China Normal University
- Shanghai 200062
- P. R. China
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11
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Singh AS, Sun SS. Structurally Flexible C₃-Symmetric Receptors for Molecular Recognition and Their Self-Assembly Properties. CHEM REC 2015. [PMID: 26202256 DOI: 10.1002/tcr.201500021] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
Abstract
The bioinspired design and synthesis of building blocks and their assemblies by the supramolecular approach has ever fascinated scientists to utilize such artificial systems for numerous purposes. Flexibility is a basic feature of natural systems. However, in artificial systems this is difficult to control, especially if there is no preorganization of the component(s) of a system. We have designed and synthesized a series of C3 -symmetric N-bridged flexible receptors and successfully utilized them to selectively entrap the notorious and toxic nitrate anion in aqueous medium. This was the first report of highest binding affinity for the nitrate anion in aqueous medium. An impressive self-sorting phenomenon of reversibly formed hydrogen-bonded capsules, which self-assembled from flexible tripodal receptors having branches of similar size and bearing the same amide functionality, has been disclosed. Encapsulated nitrate anion has been further utilized for the photochemical [2+2] cycloaddition reaction for the synthesis of strained four-membered ring structures through dynamic self-assembly. In this Personal Account, we summarize these results showing the utility of naturally inspired flexibility in artificial systems.
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Affiliation(s)
- Ashutosh S Singh
- School of Chemical Sciences, National Institute of Science Education and Research (NISER), Institute of Physics Campus, Sachivalaya Marg, Near Sainik School, Bhubaneswar, 751005, India
| | - Shih-Sheng Sun
- Institute of Chemistry, Academia Sinica, 115 Nankang, Taipei, Taiwan.
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12
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Chang KC, Sun SS, Odago MO, Lees AJ. Anion recognition and sensing by transition-metal complexes with polarized N H recognition motifs. Coord Chem Rev 2015. [DOI: 10.1016/j.ccr.2014.09.009] [Citation(s) in RCA: 96] [Impact Index Per Article: 10.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
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13
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Dutta R, Ghosh P. Artificial receptors for nitrate: a comprehensive overview. Chem Commun (Camb) 2015; 51:9070-84. [DOI: 10.1039/c5cc01266j] [Citation(s) in RCA: 37] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/28/2023]
Abstract
In this feature article, we describe the current status and recent development of synthetic anion receptors for the recognition of nitrate.
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Affiliation(s)
- Ranjan Dutta
- Department of Inorganic Chemistry
- Indian Association for the Cultivation of Science
- Kolkata-700032
- India
| | - Pradyut Ghosh
- Department of Inorganic Chemistry
- Indian Association for the Cultivation of Science
- Kolkata-700032
- India
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14
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Kudryavtsev IY, Baulina TV, Pasechnik MP, Matveev SV, Matveeva AG. Synthesis and Coordination Properties of Tripodal Ligand on the Triphenylphosphine Oxide Platform with Carbamoyl Side Arms. PHOSPHORUS SULFUR 2014. [DOI: 10.1080/10426507.2014.904865] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
Affiliation(s)
- Igor Yu. Kudryavtsev
- Nesmeyanov Institute of Organoelement Compounds, Russian Academy of Sciences, Moscow 119991, Russia
| | - Tat’yana V. Baulina
- Nesmeyanov Institute of Organoelement Compounds, Russian Academy of Sciences, Moscow 119991, Russia
| | - Margarita P. Pasechnik
- Nesmeyanov Institute of Organoelement Compounds, Russian Academy of Sciences, Moscow 119991, Russia
| | - Sergei V. Matveev
- Nesmeyanov Institute of Organoelement Compounds, Russian Academy of Sciences, Moscow 119991, Russia
| | - Anna G. Matveeva
- Nesmeyanov Institute of Organoelement Compounds, Russian Academy of Sciences, Moscow 119991, Russia
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15
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Dutta R, Ghosh P. Recent developments in anion induced capsular self-assemblies. Chem Commun (Camb) 2014; 50:10538-54. [PMID: 24934477 DOI: 10.1039/c4cc02957g] [Citation(s) in RCA: 43] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
This Feature Article covers recent developments in anion induced capsular self-assemblies, with particular focus on important reports from 2011 to 2013. Contemporary studies on the capsular binding of environmentally and biologically relevant anions in aqueous medium are described. Emerging reports of such systems reveal their potential utility towards various functional aspects like anion separation, CO2 fixation, hydrated halide recognition and anion transportation. This article also highlights potential applications of anion induced molecular capsules.
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Affiliation(s)
- Ranjan Dutta
- Department of Inorganic Chemistry, Indian Association for the Cultivation of Science, 2A & 2B Raja S. C. Mullick Road, Kolkata 700032, India.
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16
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Basu A, Das G. A C3v-Symmetric Tripodal Urea Receptor for Anions and Ion Pairs: Formation of Dimeric Capsular Assemblies of the Receptor during Anion and Ion Pair Coordination. J Org Chem 2014; 79:2647-56. [DOI: 10.1021/jo500102e] [Citation(s) in RCA: 36] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/03/2023]
Affiliation(s)
- Arghya Basu
- Department
of Chemistry, Indian Institute of Technology, Guwahati, Assam 781039, India
| | - Gopal Das
- Department
of Chemistry, Indian Institute of Technology, Guwahati, Assam 781039, India
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17
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Plasmonic nanostructures to enhance catalytic performance of zeolites under visible light. Sci Rep 2014; 4:3805. [PMID: 24448225 PMCID: PMC3898204 DOI: 10.1038/srep03805] [Citation(s) in RCA: 33] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/29/2013] [Accepted: 12/23/2013] [Indexed: 02/04/2023] Open
Abstract
Light absorption efficiency of heterogeneous catalysts has restricted their photocatalytic capability for commercially important organic synthesis. Here, we report a way of harvesting visible light efficiently to boost zeolite catalysis by means of plasmonic gold nanoparticles (Au-NPs) supported on zeolites. Zeolites possess strong Brønsted acids and polarized electric fields created by extra-framework cations. The polarized electric fields can be further intensified by the electric near-field enhancement of Au-NPs, which results from the localized surface plasmon resonance (LSPR) upon visible light irradiation. The acetalization reaction was selected as a showcase performed on MZSM-5 and Au/MZSM-5 (M = H+, Na+, Ca2+, or La3+). The density functional theory (DFT) calculations confirmed that the intensified polarized electric fields played a critical role in stretching the C = O bond of the reactants of benzaldehyde to enlarge their molecular polarities, thus allowing reactants to be activated more efficiently by catalytic centers so as to boost the reaction rates. This discovery should evoke intensive research interest on plasmonic metals and diverse zeolites with an aim to take advantage of sunlight for plasmonic devices, molecular electronics, energy storage, and catalysis.
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18
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Basu A, Chutia R, Das G. Dual modes of binding on the hexafluorosilicate anion by a C3v symmetric flexible tripodal amide ligand in solid state. CrystEngComm 2014. [DOI: 10.1039/c4ce00529e] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A para-nitrophenyl functionalized C3v symmetric flexible tripodal amide ligand, L, shows remarkable solvent dependent dual binding behaviour towards the octahedral hexafluorosilicate anion in solid state.
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Affiliation(s)
- Arghya Basu
- Department of Chemistry
- Indian Institute of Technology Guwahati
- Guwahati 781039, India
| | - Romen Chutia
- Department of Chemistry
- Indian Institute of Technology Guwahati
- Guwahati 781039, India
| | - Gopal Das
- Department of Chemistry
- Indian Institute of Technology Guwahati
- Guwahati 781039, India
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19
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Gale PA, Busschaert N, Haynes CJE, Karagiannidis LE, Kirby IL. Anion receptor chemistry: highlights from 2011 and 2012. Chem Soc Rev 2013; 43:205-41. [PMID: 24108306 DOI: 10.1039/c3cs60316d] [Citation(s) in RCA: 386] [Impact Index Per Article: 35.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Abstract
This review covers advances in anion complexation in the years 2011 and 2012. The review covers both organic and inorganic systems and also highlights the applications to which anion receptors can be applied such as self-assembly and molecular architecture, sensing, catalysis and anion transport.
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Affiliation(s)
- Philip A Gale
- Chemistry, University of Southampton, Southampton, SO17 1BJ, UK.
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20
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Basu A, Das G. Encapsulation of a discrete cyclic halide water tetramer [X2(H2O)2]2-, X = Cl-/Br- within a dimeric capsular assembly of a tripodal amide receptor. Chem Commun (Camb) 2013; 49:3997-9. [PMID: 23563509 DOI: 10.1039/c3cc40955d] [Citation(s) in RCA: 52] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/05/2023]
Abstract
A conformationally flexible C3v symmetric N-bridged tripodal amide receptor encapsulates a tetrameric halide water cluster [X2(H2O)2](2-) (X = Cl(-)/Br(-)) within its dimeric capsular assembly and forms a non-capsular 1D polymeric assembly with higher homologous iodide anions upon protonation.
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Affiliation(s)
- Arghya Basu
- Department of Chemistry, Indian Institute of Technology Guwahati, Guwahati 781039, Assam, India
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21
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Singh AS, Sun SS. Recyclable nitrate-templated photochemical [2+2] cycloaddition reaction promoted by a tripodal receptor. Chem Commun (Camb) 2013; 49:10070-2. [DOI: 10.1039/c3cc41268g] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
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22
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Chang KC, Sun SS, Lees AJ. Anion sensing by rhenium(I) carbonyls with polarized N–H recognition motifs. Inorganica Chim Acta 2012. [DOI: 10.1016/j.ica.2012.02.001] [Citation(s) in RCA: 29] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
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23
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Singh AS, Sun SS. Narcissistic self-sorting of hydrogen-bonded dimeric capsules formed through self-assembly of flexible tripodal receptors in polar solvents. Chem Commun (Camb) 2012; 48:7392-4. [PMID: 22711179 DOI: 10.1039/c2cc33645f] [Citation(s) in RCA: 27] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/20/2023]
Abstract
Purely hydrogen-bonded dimeric capsule formation through self-sorting of three different tripodal receptors, having similar size and bearing the same functionality, through dynamic self-assembly in polar solvents is reported.
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Affiliation(s)
- Ashutosh S Singh
- Institute of Chemistry, Academia Sinica, 115 Nankang, Taipei, Taiwan, Republic of China
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24
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Singh AS, Sun SS. Recognition, encapsulation, and selective fluorescence sensing of nitrate anion by neutral C3-symmetric tripodal podands bearing amide functionality. J Org Chem 2012; 77:1880-90. [PMID: 22263877 DOI: 10.1021/jo202502f] [Citation(s) in RCA: 48] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/22/2023]
Abstract
A series of neutral C(3)-symmetric acyclic artificial receptors incorporating amide functionality has been designed, synthesized, and fully characterized. Upon protonation, these conformationally flexible N-bridged tripodal podands 1-5 form in situ cone shape conformation through hydrogen bonding and C-H···π interactions. The protonation-induced interior preorganized cavity is capable of entrapping nitrate anions through the amide N-H bonds to form discrete nitrate complexes (1a-5a), which were fully characterized by NMR, HRESI mass spectra, and single crystal structures. By incorporating suitable fluorophores at each branch of the tripod receptor, the resulting fluorescent receptor 5 selectively recognized nitrate anions by fluorescent quenching in a DMSO solution and displayed one of the highest binding affinities for nitrate anions reported so far in polar media. Receptor 5 represents a unique example of a neutral receptor for the recognition of nitrate anions in polar solvent media by its zwitterionic form. The possible mechanism of proton-induced preorganization of these flexible, acyclic receptors in a convergent cone conformation followed by nitrate complexation has been proposed to rationalize the effective nitrate recognition.
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Affiliation(s)
- Ashutosh S Singh
- Institute of Chemistry, Academia Sinica, Taipei, 115, Taiwan, Republic of China
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25
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Kilbas B, Mirtschin S, Scopelliti R, Severin K. A solvent-responsive coordination cage. Chem Sci 2012. [DOI: 10.1039/c1sc00779c] [Citation(s) in RCA: 105] [Impact Index Per Article: 8.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022] Open
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26
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Basu A, Das G. Encapsulation of divalent tetrahedral oxyanions of sulfur within the rigidified dimeric capsular assembly of a tripodal receptor: first crystallographic evidence of thiosulfate encapsulation within neutral receptor capsule. Dalton Trans 2012; 41:10792-802. [DOI: 10.1039/c2dt30999h] [Citation(s) in RCA: 29] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/01/2023]
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27
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Singh AS, Sun SS. Reversible encapsulation of a nitrate guest via hydrogen-bonded self-assembled capsule formation by a flexible tripodal receptor in polar solvent through dynamic self-assembly. RSC Adv 2012. [DOI: 10.1039/c2ra20759a] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022] Open
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