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Huang WL, Wang XD, Ao YF, Wang QQ, Wang DX. An Artificial Single Molecular Channel Showing High Chloride Transport Selectivity and pH-Responsive Conductance. Angew Chem Int Ed Engl 2023; 62:e202302198. [PMID: 37021747 DOI: 10.1002/anie.202302198] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/13/2023] [Revised: 03/24/2023] [Accepted: 04/06/2023] [Indexed: 04/07/2023]
Abstract
Inspired by the unique structure and function of natural chloride channel (ClC) selectivity filter, we present herein the design of a ClC-type single channel molecule. This channel displays high ion transport activity with half-maximal effective concentration EC50 being 0.10 μM or 0.075 mol% (channel molecule to lipid ratio) determined by fluorescent analysis using lucigenin-encapsulated vesicles. Planar bilayer lipid membrane conductance measurements indicated an excellent Cl-/K+ selectivity with permeability ratio PCl-/PK+ up to 12.31, which is comparable with the chloride selectivity of natural ClC proteins. Moreover, high anion/anion selectivity (PCl-/PBr- = 66.21) and pH-dependent conductance and ion selectivity of channel molecule were also revealed. The ClC-like transport behaviours are contributed by the cooperation of hydrogen bonding and anion-π interactions in the central macrocyclic skeleton, and by the existence of pH-responsive terminal phenylalanine residues.
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Affiliation(s)
- Wen-Long Huang
- Institute of Chemistry Chinese Academy of Sciences, Laboratory of Molecular Recognition and Function, Zhongguancun North First Street 2, 100190, Beijing, CHINA
| | - Xu-Dong Wang
- Institute of Chemistry Chinese Academy of Sciences, Laboratory of Molecular Recognition and Function, Zhongguancun North First Street 2, 100190, Beijing, CHINA
| | - Yu-Fei Ao
- Institute of Chemistry Chinese Academy of Sciences, Laboratory of Molecular Recognition and Function, Zhongguancun North First Street 2, 100190, Beijing, CHINA
| | - Qi-Qiang Wang
- Institute of Chemistry Chinese Academy of Sciences, Laboratory of Molecular Recognition and Function, Zhongguancun North First Street 2, 100190, Beijing, CHINA
| | - De-Xian Wang
- Institute of Chemistry Chinese Academy of Sciences, CAS Key Laboratory of Molecular Recognition and Function, Zhongguanchun, 100190, Beijing, CHINA
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2
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Fan D, Du J, Dang J, Wang C, Mo Y. The strength and selectivity of perfluorinated nano-hoops and buckybowls for anion binding and the nature of anion-π interactions. J Comput Chem 2023; 44:138-148. [PMID: 35147229 DOI: 10.1002/jcc.26820] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/12/2021] [Revised: 01/17/2022] [Accepted: 01/21/2022] [Indexed: 12/31/2022]
Abstract
Perfluorinated cycloparaphenylenes (F-[n]CPP, n = 5-8), boron nitride nanohoop (F-[5]BNNH), and buckybowls (F-BBs) were proposed as anion receptors via anion-π interactions with halide anions (Cl- , Br- and I- ), and remarkable binding strengths up to -294.8 kJ/mol were computationally verified. The energy decomposition approach based on the block-localized wavefunction method, which combines the computational efficiency of molecular orbital theory and the chemical intuition of ab initio valence bond theory, was applied to the above anion-π complexes, in order to elucidate the nature and selectivity of these interactions. The overall attraction is mainly governed by the frozen energy component, in which the electrostatic interaction is included. Remarkable binding strengths with F-[n]CPPs can be attributed to the accumulated anion-π interactions between the anion and each conjugated ring on the hoop, while for F-BBs, additional stability results from the curved frameworks, which distribute electron densities unequally on π-faces. Interestingly, the strongest host was proved to be the F-[5]BNNH, which exhibits the most significant anisotropy of the electrostatic potential surface due to the difference in the electronegativities of nitrogen and boron. The selectivity of each host for anions was explored and the importance of the often-overlooked Pauli exchange repulsion was illustrated. Chloride anion turns out to be the most favorable anion for all receptors, due to the smallest ionic radius and the weakest destabilizing Pauli exchange repulsion.
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Affiliation(s)
- Dan Fan
- Key Laboratory for Macromolecular Science of Shaanxi Province, School of Chemistry & Chemical Engineering, Shaanxi Normal University, Xi'an, China
| | - Juan Du
- Key Laboratory for Macromolecular Science of Shaanxi Province, School of Chemistry & Chemical Engineering, Shaanxi Normal University, Xi'an, China
| | - Jingshuang Dang
- Key Laboratory for Macromolecular Science of Shaanxi Province, School of Chemistry & Chemical Engineering, Shaanxi Normal University, Xi'an, China
| | - Changwei Wang
- Key Laboratory for Macromolecular Science of Shaanxi Province, School of Chemistry & Chemical Engineering, Shaanxi Normal University, Xi'an, China
| | - Yirong Mo
- Department of Nanoscience, Joint School of Nanoscience and Nanoengineering, University of North Carolina at Greensboro, Greensboro, North Carolina, USA
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Plais R, Gouarin G, Bournier A, Zayene O, Mussard V, Bourdreux F, Marrot J, Brosseau A, Gaucher A, Clavier G, Salpin JY, Prim D. Chloride Binding Modulated by Anion Receptors Bearing Tetrazine and Urea. Chemphyschem 2023; 24:e202200524. [PMID: 36111796 PMCID: PMC10091995 DOI: 10.1002/cphc.202200524] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/17/2022] [Revised: 09/15/2022] [Indexed: 01/20/2023]
Abstract
Modulation and fine-tuning of the strength of weak interactions to bind anions are described in a series of synthetic receptors. The general design of the receptors includes both a urea motif and a tetrazine motif. The synthetic sequence towards three receptors is detailed. Impacts of H-bond strength and linker length between urea and tetrazine on chloride complexation are studied. Binding properties of the chloride anion are examined in both the ground and excited states using a panel of analytical methods (NMR spectroscopy, mass spectrometry, UV/Visible spectroscopies, and fluorescence). A ranking of the receptors by complexation strength has been determined, allowing a better understanding of the structure-properties relationship on these compounds.
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Affiliation(s)
- Romain Plais
- Institut Lavoisier de Versailles, Université Paris-Saclay, UVSQ, CNRS, 78000, Versailles, France
| | - Guy Gouarin
- Institut Lavoisier de Versailles, Université Paris-Saclay, UVSQ, CNRS, 78000, Versailles, France
| | - Amélie Bournier
- LAMBE, Université Paris-Saclay, Univ Evry, CNRS, 91025, Evry-Courcouronnes, France.,LAMBE, CY Cergy Paris Université, CNRS, 95000, Cergy, France
| | - Olfa Zayene
- Institut Lavoisier de Versailles, Université Paris-Saclay, UVSQ, CNRS, 78000, Versailles, France
| | - Vanessa Mussard
- Institut Lavoisier de Versailles, Université Paris-Saclay, UVSQ, CNRS, 78000, Versailles, France
| | - Flavien Bourdreux
- Institut Lavoisier de Versailles, Université Paris-Saclay, UVSQ, CNRS, 78000, Versailles, France
| | - Jérome Marrot
- Institut Lavoisier de Versailles, Université Paris-Saclay, UVSQ, CNRS, 78000, Versailles, France
| | - Arnaud Brosseau
- PPSM, Université Paris-Saclay, ENS Paris-Saclay, CNRS, 91190, Gif-sur-Yvette, France
| | - Anne Gaucher
- Institut Lavoisier de Versailles, Université Paris-Saclay, UVSQ, CNRS, 78000, Versailles, France
| | - Gilles Clavier
- PPSM, Université Paris-Saclay, ENS Paris-Saclay, CNRS, 91190, Gif-sur-Yvette, France
| | - Jean-Yves Salpin
- LAMBE, Université Paris-Saclay, Univ Evry, CNRS, 91025, Evry-Courcouronnes, France.,LAMBE, CY Cergy Paris Université, CNRS, 95000, Cergy, France
| | - Damien Prim
- Institut Lavoisier de Versailles, Université Paris-Saclay, UVSQ, CNRS, 78000, Versailles, France
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Parameswaran AM, James A, Aboobacker A, Srinivasamurthy Swathi R. Unfurling Anion-π Interactions Involving Graphynes. Chemphyschem 2023; 24:e202200548. [PMID: 36068988 DOI: 10.1002/cphc.202200548] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/25/2022] [Revised: 09/06/2022] [Indexed: 01/07/2023]
Abstract
Ever since the inception of anion-π interactions, their nature and functional relevance have intrigued researchers. We address the twin challenge of elucidation of the role of extended conjugation and design of all-carbon neutral anion receptors by computations on the anion-π complexes of the halide ions with graphynes. Leveraging on the extended π-conjugation effects, we unfurl the functional relevance of graphynes as anion receptors using descriptors such as electrostatic potential, quadrupole moments, molecular polarizabilities and binding energies. Further, employing natural energy decomposition analysis, we assert that anion-π interactions are not merely dominated by electrostatic interactions. The polarization components do indeed play a crucial role in governing the binding of the anions to the graphynes.
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Affiliation(s)
- Aiswarya M Parameswaran
- School of Chemistry, Indian Institute of Science Education and Research Thiruvananthapuram, Vithura, Thiruvananthapuram 695551, India
| | - Anto James
- School of Chemistry, Indian Institute of Science Education and Research Thiruvananthapuram, Vithura, Thiruvananthapuram 695551, India
| | - Adil Aboobacker
- School of Chemistry, Indian Institute of Science Education and Research Thiruvananthapuram, Vithura, Thiruvananthapuram 695551, India
| | - Rotti Srinivasamurthy Swathi
- School of Chemistry, Indian Institute of Science Education and Research Thiruvananthapuram, Vithura, Thiruvananthapuram 695551, India
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Quiñonero D. Anion Recognition by Pyrylium Cations and Thio-, Seleno- and Telluro- Analogues: A Combined Theoretical and Cambridge Structural Database Study. Molecules 2015; 20:11632-59. [PMID: 26114926 DOI: 10.3390/molecules200711632] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/05/2015] [Revised: 06/17/2015] [Accepted: 06/18/2015] [Indexed: 01/04/2023] Open
Abstract
Pyrylium salts are a very important class of organic molecules containing a trivalent oxygen atom in a six-membered aromatic ring. In this manuscript, we report a theoretical study of pyrylium salts and their thio-, seleno- and telluro- analogues by means of DFT calculations. For this purpose, unsubstituted 2,4,6-trimethyl and 2,4,6-triphenyl cations and anions with different morphologies were chosen (Cl–, NO3– and BF4–). The complexes were characterized by means of natural bond orbital and “atoms-in-molecules” theories, and the physical nature of the interactions has been analyzed by means of symmetry-adapted perturbation theory calculations. Our results indicate the presence of anion-π interactions and chalcogen bonds based on both σ- and π-hole interactions and the existence of very favorable σ-complexes, especially for unsubstituted cations. The electrostatic component is dominant in the interactions, although the induction contributions are important, particularly for chloride complexes. The geometrical features of the complexes have been compared with experimental data retrieved from the Cambridge Structural Database.
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