51
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Singh A, Torres-Huerta A, Vanderlinden T, Renier N, Martínez-Crespo L, Tumanov N, Wouters J, Bartik K, Jabin I, Valkenier H. Calix[6]arenes with halogen bond donor groups as selective and efficient anion transporters. Chem Commun (Camb) 2022; 58:6255-6258. [PMID: 35521967 PMCID: PMC9128489 DOI: 10.1039/d2cc00847e] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Abstract
Here we present the anion binding and anion transport properties of a series of calix[6]arenes decorated on their small rim with either halogen bond or hydrogen bond donating groups. We show that the halogen bond donating iodotriazole groups enable highly selective transport of chloride and nitrate anions, without transport of protons or hydroxide, at rates similar to those observed with thiourea or squaramide groups. A calix[6]arene with three preorganised halogen bond donating groups gives >100-fold selectivity for Cl− uniport over HCl symport, in contrast to analogous compounds with strong hydrogen bond donating groups.![]()
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Affiliation(s)
- Anurag Singh
- Université libre de Bruxelles (ULB), Ecole polytechnique de Bruxelles, Engineering Molecular NanoSystems, Avenue Franklin Roosevelt 50, 1050 Brussels, Belgium.
| | - Aaron Torres-Huerta
- Université libre de Bruxelles (ULB), Ecole polytechnique de Bruxelles, Engineering Molecular NanoSystems, Avenue Franklin Roosevelt 50, 1050 Brussels, Belgium.
| | - Tom Vanderlinden
- Université libre de Bruxelles (ULB), Ecole polytechnique de Bruxelles, Engineering Molecular NanoSystems, Avenue Franklin Roosevelt 50, 1050 Brussels, Belgium. .,Université libre de Bruxelles (ULB), Faculty of science, Laboratoire de Chimie Organique, Avenue Franklin Roosevelt 50, 1050 Brussels, Belgium
| | - Nathan Renier
- Université libre de Bruxelles (ULB), Ecole polytechnique de Bruxelles, Engineering Molecular NanoSystems, Avenue Franklin Roosevelt 50, 1050 Brussels, Belgium.
| | - Luis Martínez-Crespo
- Université libre de Bruxelles (ULB), Ecole polytechnique de Bruxelles, Engineering Molecular NanoSystems, Avenue Franklin Roosevelt 50, 1050 Brussels, Belgium.
| | - Nikolay Tumanov
- Namur Institute of Structured Matter and Namur Research Institute for Life Sciences, Department of Chemistry, University of Namur, 61 rue de Bruxelles, B-5000 Namur, Belgium
| | - Johan Wouters
- Namur Institute of Structured Matter and Namur Research Institute for Life Sciences, Department of Chemistry, University of Namur, 61 rue de Bruxelles, B-5000 Namur, Belgium
| | - Kristin Bartik
- Université libre de Bruxelles (ULB), Ecole polytechnique de Bruxelles, Engineering Molecular NanoSystems, Avenue Franklin Roosevelt 50, 1050 Brussels, Belgium.
| | - Ivan Jabin
- Université libre de Bruxelles (ULB), Faculty of science, Laboratoire de Chimie Organique, Avenue Franklin Roosevelt 50, 1050 Brussels, Belgium
| | - Hennie Valkenier
- Université libre de Bruxelles (ULB), Ecole polytechnique de Bruxelles, Engineering Molecular NanoSystems, Avenue Franklin Roosevelt 50, 1050 Brussels, Belgium.
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52
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Hollstein S, Shyshov O, Hanževački M, Zhao J, Rudolf T, Jäger CM, Delius M. Dynamisch kovalente Selbstassemblierung von Chlorid‐ und Ionenpaar‐templierten Kryptaten. Angew Chem Int Ed Engl 2022. [DOI: 10.1002/ange.202201831] [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)
- Selina Hollstein
- Institut für Organische Chemie Universität Ulm Albert-Einstein-Allee 11 89081 Ulm Deutschland
| | - Oleksandr Shyshov
- Institut für Organische Chemie Universität Ulm Albert-Einstein-Allee 11 89081 Ulm Deutschland
| | - Marko Hanževački
- Department of Chemical and Environmental Engineering University of Nottingham University Park Nottingham NG7 2RD Großbritannien
| | - Jie Zhao
- Institut für Organische Chemie Universität Ulm Albert-Einstein-Allee 11 89081 Ulm Deutschland
| | - Tamara Rudolf
- Institut für Organische Chemie Universität Ulm Albert-Einstein-Allee 11 89081 Ulm Deutschland
| | - Christof M. Jäger
- Department of Chemical and Environmental Engineering University of Nottingham University Park Nottingham NG7 2RD Großbritannien
| | - Max Delius
- Institut für Organische Chemie Universität Ulm Albert-Einstein-Allee 11 89081 Ulm Deutschland
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53
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Chen L, Wu X, Gilchrist AM, Gale PA. Organoplatinum Compounds as Anion‐Tuneable Uphill Hydroxide Transporters. Angew Chem Int Ed Engl 2022; 61:e202116355. [PMID: 35192743 PMCID: PMC9310596 DOI: 10.1002/anie.202116355] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/30/2021] [Indexed: 11/12/2022]
Abstract
Active transport of ions uphill, creating a concentration gradient across a cell membrane, is essential for life. It remains a significant challenge to develop synthetic systems that allow active uphill transport. Here, a transport process fuelled by organometallic compounds is reported that creates a pH gradient. The hydrolysis reaction of PtII complexes results in the formation of aqua complexes that established rapid transmembrane movement (“flip‐flop”) of neutral Pt−OH species, leading to protonation of the OH group in the inner leaflet, generating OH− ions, and so increasing the pH in the intravesicular solution. The organoplatinum complex effectively transports bound hydroxide ions across the membrane in a neutral complex. The initial net flow of the PtII complex into the vesicles generates a positive electric potential that can further drive uphill transport because the electric potential is opposed to the chemical potential of OH−. The OH− ions equilibrate with this transmembrane electric potential but cannot remove it due to the relatively low permeability of the charged species. As a result, effective hydroxide transport against its concentration gradient can be achieved, and multiple additions can continuously drive the generation of OH− against its concentration gradient up to ΔpH>2. Moreover, the external addition of different anions can control the generation of OH− depending on their anion binding affinity. When anions displayed very high binding affinities towards PtII compounds, such as halides, the external anions could dissipate the pH gradient. In contrast, a further pH increase was observed for weak binding anions, such as sulfate, due to the increase of positive electric potential.
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Affiliation(s)
- Li‐Jun Chen
- School of Chemistry The University of Sydney Sydney NSW 2006 Australia
| | - Xin Wu
- School of Chemistry The University of Sydney Sydney NSW 2006 Australia
| | | | - Philip A. Gale
- School of Chemistry The University of Sydney Sydney NSW 2006 Australia
- The University of Sydney Nano Institute (SydneyNano) The University of Sydney Sydney NSW 2006 Australia
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54
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Abstract
Both biological and artificial membrane transporters mediate passive transmembrane ion flux predominantly via either channel or carrier mechanisms, tightly regulating the transport of materials entering and exiting the cell. One early elegant example unclassifiable as carriers or channels was reported by Smith who derivatized a phospholipid molecule into an anion transporter, facilitating membrane transport via a two-station relay mechanism (Smith et al. J. Am. Chem. Soc. 2008, 130, 17274-17275). Our journey toward blurring or even breaking the boundaries defined by the carrier and channel mechanisms starts in January of 2018 when seeing a child swinging on the swing at the playground park. Since then, I have been wondering whether we could build a nanoscale-sized molecular swing able to perform the swing function at the molecular level to induce transmembrane ion flux. Such research journey culminates in several membrane-active artificial molecular machines, including molecular swings, ion fishers, ion swimmers, rotors, tetrapuses and dodecapuses that permeabilize the membrane via swinging, ion-fishing, swimming, rotating, or swing-relaying actions, respectively. Except for molecular ion swimmers, these unconventional membrane transporters in their most stable states readily span across the entire membrane in a way akin to channels. With built-in flexible arms that can swing or bend in the dynamic membrane environment, they transport ions via constantly changing ion permeation pathways that are more defined than carriers but less defined than channels. Applying the same benzo-crown ether groups as the sole ion-binding and -transporting units, these transporters however differ immensely in ion transport property. While the maximal K+ transport activity is achieved by the molecular swing also termed "motional channel" that displays an EC50 value of 0.021 mol % relative to lipid and transports K+ ions at rate 27% faster than gramicidin A, the highest K+/Na+ selectivity of 18.3 is attained by the molecular ion fisher, with the highest Na+/K+ selectivity of 13.7 by the molecular dodecapus. Having EC50 values of 0.49-1.60 mol % and K+/Na+ values of 1.1-6.3, molecular rotors and tetrapuses are found to be generally active but weakly to moderately K+-selective. For molecular ion swimmers that contain 10 to 14 carbon atom alkyl linkers, they all turn out to be highly active (EC50 = 0.18-0.41 mol %) and highly selective (RK+/RNa+ = 7.0-9.5) transporters. Of special note are crown ether-appended molecular dodecapuses that establish the C60-fullerene core as an excellent platform to allow for a direct translation of solution binding affinity to transmembrane ion transport selectivity, providing a de novo basis for rationally designing artificial ion transporters with high transport selectivity. Considering remarkable cytotoxic activities displayed by molecular swings and ion swimmers, the varied types of existing and emerging unconventional membrane transporters with enhanced activities and selectivities eventually might lead to medical benefits in the future.
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Affiliation(s)
- Jie Shen
- School of Chemistry and Chemical Engineering, Northwestern Polytechnical University, Xi’an, Shaanxi 710072, China
| | - Changliang Ren
- School of Pharmaceutical Sciences, Xiamen University, Xiamen, Fujian 361102, China
| | - Huaqiang Zeng
- School of Chemistry and Chemical Engineering, Northwestern Polytechnical University, Xi’an, Shaanxi 710072, China
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55
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Chen L, Wu X, Gilchrist AM, Gale PA. Organoplatinum Compounds as Anion‐Tuneable Uphill Hydroxide Transporters. Angew Chem Int Ed Engl 2022. [DOI: 10.1002/ange.202116355] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Affiliation(s)
- Li‐Jun Chen
- School of Chemistry The University of Sydney Sydney NSW 2006 Australia
| | - Xin Wu
- School of Chemistry The University of Sydney Sydney NSW 2006 Australia
| | | | - Philip A. Gale
- School of Chemistry The University of Sydney Sydney NSW 2006 Australia
- The University of Sydney Nano Institute (SydneyNano) The University of Sydney Sydney NSW 2006 Australia
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56
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A Simulation Model for the Non-Electrogenic Uniport Carrier-Assisted Transport of Ions across Lipid Membranes. MEMBRANES 2022; 12:membranes12030292. [PMID: 35323767 PMCID: PMC8955484 DOI: 10.3390/membranes12030292] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 02/06/2022] [Revised: 02/24/2022] [Accepted: 03/01/2022] [Indexed: 12/10/2022]
Abstract
Impressive work has been completed in recent decades on the transmembrane anion transport capability of small synthetic transporters from many different structural classes. However, very few predicting models have been proposed for the fast screening of compound libraries before spending time and resources on the laboratory bench for their synthesis. In this work, a new approach is presented which aims at describing the transport process by taking all the steps into explicit consideration, and includes all possible experiment-derived parameters. The algorithm is able to simulate the macroscopic experiments performed with lipid vesicles to assess the ion-transport ability of the synthetic transporters following a non-electrogenic uniport mechanism. While keeping calculation time affordable, the final goal is the curve-fitting of real experimental data—so, to obtain both an analysis and a predictive tool. The role and the relative weight of the different parameters is discussed and the agreement with the literature is shown by using the simulations of a virtual benchmark case. The fitting of real experimental curves is also shown for two transporters of different structural type.
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57
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Shen ZN, Xu YX, Wang CY, Qiao B. Fine‐tuning the Thermal Relaxation Dynamics of Indigo‐based Photoswitches Using Selective Non‐covalent Interactions without Chemical Modification. CHEMPHOTOCHEM 2022. [DOI: 10.1002/cptc.202200004] [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)
- Zhen-Nan Shen
- ShanghaiTech University School of Physical Science and Technology shanghai,pudongShanghai 231567 Shanghai CHINA
| | - Yu-Xuan Xu
- ShanghaiTech University School of Physical Science and Technology CHINA
| | - Chen-Yu Wang
- ShanghaiTech University School of Physical Science and Technology CHINA
| | - Bo Qiao
- ShanghaiTech University School of Physical Science and Technology 393 Middle Huaxia Road 201210 Shanghai CHINA
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58
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Danjo H, Asai K, Tanaka T, Ono D, Kawahata M, Iwatsuki S. Preparation of tricationic tris(pyridylpalladium(II)) metallacyclophane as an anion receptor. Chem Commun (Camb) 2022; 58:2196-2199. [PMID: 35072179 DOI: 10.1039/d1cc05563a] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
A tricationic tris(pyridylpalladium(II)) metallacyclophane was prepared from 3,5-dibromopyridine by a successive treatment with tetrakis(triphenylphosphine)palladium(0), diphosphine, and silver salt. Single-crystal X-ray diffraction analysis revealed that the metallacyclophane incorporated one of three counter anions into its hole-shaped cavity to form multidentate C-H⋯anion interactions. Solution-phase 1H NMR experiments in DMSO-d6 indicated that the metallacyclophane exhibited selective binding behavior toward nitrate, tetrafluoroborate, p-toluenesulfonate, perchlorate, and hydrogen sulfate ions, whereas the hexafluoroantimonate ion exhibited only weak interaction toward the metallacyclophane. This anion recognition behavior was further demonstrated by an extraction experiment of water-soluble sulfonate dyes.
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Affiliation(s)
- Hiroshi Danjo
- Department of Chemistry, Konan University, 8-9-1 Okamoto, Higashinada, Kobe 658-8501, Japan.
| | - Kohei Asai
- Graduate School of Natural Science, Konan University, 8-9-1 Okamoto, Higashinada, Kobe 658-8501, Japan
| | - Tomoya Tanaka
- Department of Chemistry, Konan University, 8-9-1 Okamoto, Higashinada, Kobe 658-8501, Japan.
| | - Daiki Ono
- Department of Chemistry, Konan University, 8-9-1 Okamoto, Higashinada, Kobe 658-8501, Japan.
| | - Masatoshi Kawahata
- Showa Pharmaceutical University, 3-3165 Higashi-Tamagawagakuen, Machida, Tokyo 194-8543, Japan
| | - Satoshi Iwatsuki
- Department of Chemistry, Konan University, 8-9-1 Okamoto, Higashinada, Kobe 658-8501, Japan.
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59
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Janus metal-organic layer functioning as a biomimetic photosynthetic reaction center. Chem 2022. [DOI: 10.1016/j.chempr.2022.01.019] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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60
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Howe ENW, Chang VVT, Wu X, Fares M, Lewis W, Macreadie LK, Gale PA. Halide-selective, proton-coupled anion transport by phenylthiosemicarbazones. BIOCHIMICA ET BIOPHYSICA ACTA. BIOMEMBRANES 2022; 1864:183828. [PMID: 34861222 DOI: 10.1016/j.bbamem.2021.183828] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/23/2021] [Revised: 11/14/2021] [Accepted: 11/22/2021] [Indexed: 12/24/2022]
Abstract
Phenylthiosemicarbazones (PTSCs) are proton-coupled anion transporters with pH-switchable behaviour known to be regulated by an imine protonation equilibrium. Previously, chloride/nitrate exchange by PTSCs was found to be inactive at pH 7.2 due to locking of the thiourea anion binding site by an intramolecular hydrogen bond, and switched ON upon imine protonation at pH 4.5. The rate-determining process of the pH switch, however, was not examined. We here develop a new series of PTSCs and demonstrate their conformational behaviour by X-ray crystallographic analysis and pH-switchable anion transport properties by liposomal assays. We report the surprising finding that the protonated PTSCs are extremely selective for halides over oxyanions in membrane transport. Owing to the high chloride over nitrate selectivity, the pH-dependent chloride/nitrate exchange of PTSCs originates from the rate-limiting nitrate transport process being inhibited at neutral pH.
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Affiliation(s)
- Ethan N W Howe
- School of Chemistry (F11), The University of Sydney, NSW 2006, Australia
| | - Vai-Vai Tiffany Chang
- School of Chemistry (F11), The University of Sydney, NSW 2006, Australia; Chemistry, University of Southampton, Southampton SO17 1BJ, UK
| | - Xin Wu
- School of Chemistry (F11), The University of Sydney, NSW 2006, Australia
| | - Mohamed Fares
- School of Chemistry (F11), The University of Sydney, NSW 2006, Australia
| | - William Lewis
- School of Chemistry (F11), The University of Sydney, NSW 2006, Australia
| | - Lauren K Macreadie
- School of Chemistry (F11), The University of Sydney, NSW 2006, Australia
| | - Philip A Gale
- School of Chemistry (F11), The University of Sydney, NSW 2006, Australia; The University of Sydney Nano Institute (SydneyNano), The University of Sydney, NSW 2006, Australia.
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61
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62
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Wezenberg SJ, Chen LJ, Bos JE, Feringa BL, Howe ENW, Wu X, Siegler MA, Gale PA. Photomodulation of Transmembrane Transport and Potential by Stiff-Stilbene Based Bis(thio)ureas. J Am Chem Soc 2022; 144:331-338. [PMID: 34932344 PMCID: PMC8759083 DOI: 10.1021/jacs.1c10034] [Citation(s) in RCA: 31] [Impact Index Per Article: 15.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/22/2021] [Indexed: 12/14/2022]
Abstract
Membrane transport proteins fulfill important regulatory functions in biology with a common trait being their ability to respond to stimuli in the environment. Various small-molecule receptors, capable of mediating transmembrane transport, have been successfully developed. However, to confer stimuli-responsiveness on them poses a fundamental challenge. Here we demonstrate photocontrol of transmembrane transport and electric potential using bis(thio)ureas derived from stiff-stilbene. UV-vis and 1H NMR spectroscopy are used to monitor E-Z photoisomerization of these bis(thio)ureas and 1H NMR titrations reveal stronger binding of chloride to the (Z)-form than to the (E)-form. Additional insight into the binding properties is provided by single crystal X-ray crystallographic analysis and DFT geometry optimization. Importantly, the (Z)-isomers are much more active in transmembrane transport than the respective (E)-isomers as shown through various assays. As a result, both membrane transport and depolarization can be modulated upon irradiation, opening up new prospects toward light-based therapeutics as well as physiological and optopharmacological tools for studying anion transport-associated diseases and to stimulate neuronal activity, respectively.
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Affiliation(s)
- Sander J. Wezenberg
- Leiden
Institute of Chemistry, Leiden University, Einsteinweg 55, 2333 CC Leiden, The Netherlands
- Stratingh
Institute for Chemistry, University of Groningen, Nijenborgh 4, 9747 AG, Groningen, The Netherlands
| | - Li-Jun Chen
- School
of Chemistry, The University of Sydney, Sydney NSW 2006, Australia
| | - Jasper E. Bos
- Leiden
Institute of Chemistry, Leiden University, Einsteinweg 55, 2333 CC Leiden, The Netherlands
| | - Ben L. Feringa
- Stratingh
Institute for Chemistry, University of Groningen, Nijenborgh 4, 9747 AG, Groningen, The Netherlands
| | - Ethan N. W. Howe
- School
of Chemistry, The University of Sydney, Sydney NSW 2006, Australia
| | - Xin Wu
- School
of Chemistry, The University of Sydney, Sydney NSW 2006, Australia
| | - Maxime A. Siegler
- Department
of Chemistry, Johns Hopkins University, 3400 North Charles Street, Baltimore, Maryland 21218, United States
| | - Philip A. Gale
- School
of Chemistry, The University of Sydney, Sydney NSW 2006, Australia
- The
University of Sydney Nano Institute (SydneyNano), The University of
Sydney, Sydney NSW 2006, Australia
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63
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Bickerton LE, Langton MJ. Controlling transmembrane ion transport via photo-regulated carrier mobility. Chem Sci 2022; 13:9531-9536. [PMID: 36091898 PMCID: PMC9400602 DOI: 10.1039/d2sc03322d] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/14/2022] [Accepted: 07/07/2022] [Indexed: 11/21/2022] Open
Abstract
Photo-gated anion transport is achieved by modulating the mobility of mobile carriers within a lipid bilayer membrane, using a photo-cleavable membrane anchor. This enables in situ, off–on activation of transport in vesicles.
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Affiliation(s)
- Laura E. Bickerton
- Chemistry Research Laboratory, Department of Chemistry, University of Oxford 12 Mansfield Road, Oxford, OX1 3TA, UK
| | - Matthew J. Langton
- Chemistry Research Laboratory, Department of Chemistry, University of Oxford 12 Mansfield Road, Oxford, OX1 3TA, UK
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64
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Yang K, Boles JE, White LJ, Hilton KLF, Lai HY, Long Y, Hiscock JR, Haynes CJE. A water-soluble membrane transporter for biologically relevant cations. RSC Adv 2022; 12:27877-27880. [DOI: 10.1039/d2ra05314d] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/24/2022] [Accepted: 09/09/2022] [Indexed: 11/21/2022] Open
Abstract
Synthetic ionophores are promising therapeutic targets, yet poor water solubility limits their potential for translation into the clinic. Here we report a water soluble, supramolecular self-associating amphiphile (SSA) with cation transport function.
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Affiliation(s)
- Kylie Yang
- Chemistry Department, UCL, 20 Gordon Street, London WC1H 0AJ, UK
| | - Jessica E. Boles
- School of Chemistry and Forensic Science, University of Kent, Canterbury, Kent, CT2 7NH, UK
| | - Lisa J. White
- School of Chemistry and Forensic Science, University of Kent, Canterbury, Kent, CT2 7NH, UK
| | - Kira L. F. Hilton
- School of Chemistry and Forensic Science, University of Kent, Canterbury, Kent, CT2 7NH, UK
| | - Hin Yuk Lai
- Chemistry Department, UCL, 20 Gordon Street, London WC1H 0AJ, UK
| | - Yifan Long
- Chemistry Department, UCL, 20 Gordon Street, London WC1H 0AJ, UK
| | - Jennifer R. Hiscock
- School of Chemistry and Forensic Science, University of Kent, Canterbury, Kent, CT2 7NH, UK
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65
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Radiush EA, Pritchina EA, Chulanova EA, Dmitriev AA, Bagryanskaya IY, Slawin AMZ, Woollins JD, Gritsan NP, Zibarev AV, Semenov NA. Chalcogen-bonded donor–acceptor complexes of 5,6-dicyano[1,2,5]selenadiazolo[3,4- b]pyrazine with halide ions. NEW J CHEM 2022. [DOI: 10.1039/d2nj02345h] [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
With halides X− (X = Cl, Br, I) 5,6-dicyano-[1,2,5]selenadiazolo[3,4-b]pyrazine 1 forms chalcogen-bonded complexes [1–X]− structurally defined by XRD. UV/Vis spectra of [1–X]− feature red-shifted charge-transfer bands in the Vis part.
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Affiliation(s)
- Ekaterina A. Radiush
- Institute of Organic Chemistry, Siberian Branch, Russian Academy of Sciences, 630090 Novosibirsk, Russia
| | - Elena A. Pritchina
- Institute of Chemical Kinetics and Combustion, Siberian Branch, Russian Academy of Sciences, 630090 Novosibirsk, Russia
- Department of Natural Sciences, National Research University – Novosibirsk State University, 630090 Novosibirsk, Russia
| | - Elena A. Chulanova
- Institute of Organic Chemistry, Siberian Branch, Russian Academy of Sciences, 630090 Novosibirsk, Russia
| | - Alexey A. Dmitriev
- Institute of Chemical Kinetics and Combustion, Siberian Branch, Russian Academy of Sciences, 630090 Novosibirsk, Russia
- Department of Physics, National Research University – Novosibirsk State University, 630090 Novosibirsk, Russia
| | - Irina Yu Bagryanskaya
- Institute of Organic Chemistry, Siberian Branch, Russian Academy of Sciences, 630090 Novosibirsk, Russia
| | | | - J. Derek Woollins
- School of Chemistry, University of St. Andrews, St Andrews, Fife KY16 9ST, UK
- Department of Chemistry, Khalifa University, Abu Dhabi, United Arab Emirates
| | - Nina P. Gritsan
- Institute of Chemical Kinetics and Combustion, Siberian Branch, Russian Academy of Sciences, 630090 Novosibirsk, Russia
| | - Andrey V. Zibarev
- Institute of Organic Chemistry, Siberian Branch, Russian Academy of Sciences, 630090 Novosibirsk, Russia
| | - Nikolay A. Semenov
- Institute of Organic Chemistry, Siberian Branch, Russian Academy of Sciences, 630090 Novosibirsk, Russia
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66
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KHURANA RAMAN, Yang F, Khurana R, Liu J, Keinan E, Reany O. semiaza-Bambusurils are Anion-Specific Transmembrane Transporters . Chem Commun (Camb) 2022; 58:3150-3153. [DOI: 10.1039/d2cc00144f] [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
semiaza-Bambus[6]urils efficiently transport anions across lipid membranes. A systematic modification of their lipophilic side chains to include various alkyl groups and thioethers reveal that the most efficient chloride transporters are...
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67
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Jothi D, Munusamy S, Manoj kumar S, Enbanathan S, Kulathu Iyer S. A benzothiazole-based new fluorogenic chemosensor for the detection of CN − and its real-time application in environmental water samples and living cells. RSC Adv 2022; 12:8570-8577. [PMID: 35424806 PMCID: PMC8984840 DOI: 10.1039/d1ra08846g] [Citation(s) in RCA: 14] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/06/2021] [Accepted: 03/07/2022] [Indexed: 11/23/2022] Open
Abstract
Since the cyanide ion is used in a wide range of industries and is harmful to both human health and the environment, a number of research efforts are dedicated to creating fluorescence sensors for the detection of cyanide (CN−). Herein, for the fluorescence detection of CN−, a new highly selective and sensitive sensor 2-(3-(benzo[d]thiazol-2-yl)-4-hydroxybenzylidene)-1H-indene-1,3(2H)-dione (BID) was created by conjugating a benzothiazole moiety with 1H-indene-1,3(2H)-dione. The donor and acceptor components of this hybrid receptor were covalently connected through a double bond. The nucleophilic addition of a cyanide anion to the BID inhibits the intramolecular charge transfer (ICT) transition, resulting in spectral and colour alterations in the receptor. When the solvent polarity was increased from n-hexane to methanol, this molecule exhibited a bathochromic shift in the emission wavelength (610 to 632 nm), suggesting the presence of a solvatochromic action. The sensor BID has shown strong specificity towards CN− by interrupting its internal charge transfer (ICT), resulting in a significant change in the UV-vis spectrum and a notable blue shift in the fluorescence emission spectrum. The cyanide anion (CN−) is responsible for the optical alterations observed by BID, as opposed to the other anions examined. The detection limit was 5.97 nM, significantly less than the WHO's permitted amount of CN− in drinking water. The experimental findings indicate that BID's fluorescence response to CN− is pH insensitive throughout a wide pH range of 6.0 to 12.0. The interaction mechanism between the BID and CN− ions has been studied by HRMS, 1H-NMR titration experiments, FT-IR, and DFT, which confirmed the nucleophilic addition of CN− on vinylidene and subsequent disturbance of ICT. Additionally, we demonstrated the real-time detection application of CN− in environmental water samples and live-cell imaging. Since the cyanide ion is used in a wide range of industries and is harmful to both human health and the environment, a number of research efforts are dedicated to creating fluorescence sensors for the detection of cyanide (CN−).![]()
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Affiliation(s)
- Dhanapal Jothi
- Department of Chemistry, School of Advanced Sciences, Vellore Institute of Technology, Vellore-632014, India
| | - Sathishkumar Munusamy
- Institute of Chemical Biology and Nanomedicine, State Key Laboratory of Chemo/Bio-sensing and Chemometrics, College of Chemistry and Chemical Engineering, Hunan University, Changsha 410082, P. R. China
| | - Selin Manoj kumar
- Department of Chemistry, School of Advanced Sciences, Vellore Institute of Technology, Vellore-632014, India
| | - Saravanan Enbanathan
- Department of Chemistry, School of Advanced Sciences, Vellore Institute of Technology, Vellore-632014, India
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68
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Belen’kii LI, Gazieva GA, Evdokimenkova YB, Soboleva NO. The literature of heterocyclic chemistry, Part XX, 2020. ADVANCES IN HETEROCYCLIC CHEMISTRY 2022. [DOI: 10.1016/bs.aihch.2022.10.005] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/05/2022]
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69
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Binding and transport properties of a benzo[b]thiophene‐based mono‐(thio)urea library. European J Org Chem 2021. [DOI: 10.1002/ejoc.202101484] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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70
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Li Y, Dong J, Gong W, Tang X, Liu Y, Cui Y, Liu Y. Artificial Biomolecular Channels: Enantioselective Transmembrane Transport of Amino Acids Mediated by Homochiral Zirconium Metal-Organic Cages. J Am Chem Soc 2021; 143:20939-20951. [PMID: 34851640 DOI: 10.1021/jacs.1c09992] [Citation(s) in RCA: 24] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
Natural transport channels (or carriers), such as aquaporins, are a distinct type of biomacromolecule capable of highly effective transmembrane transport of water or ions. Such behavior is routine for biology but has proved difficult to achieve in synthetic systems. Perhaps most significantly, the enantioselective transmembrane transport of biomolecules is an especially challenging problem both for chemists and for natural systems. Herein, a group of homochiral zirconium metal-organic cages with four triangular opening windows have been proposed as artificial biomolecular channels for enantioselective transmembrane transport of natural amino acids. These structurally well-defined coordination cages are assembled from six synthetically accessible BINOL-derived chiral ligands as spacers and four n-Bu3-Cp3Zr3 clusters as vertices, forming tetrahedral-shaped architectures that feature an intrinsically chiral cavity decorated with an array of specifically positioned binding sites mediated from phenol to phenyl ether to crown ether groups. Fascinatingly, the transformation of single-molecule chirality to global supramolecular chirality within the space-restricted chiral microenvironments accompanies unprecedented chiral amplification, leading to the enantiospecific recognition of amino acids. By virtue of the highly structural stability and excellent biocompatibility, the orientation-independent cages can be molecularly embedded into lipid membranes, biomimetically serving as single-molecular chiral channels for polar-residue amino acids, with the properties that cage-1 featuring hydroxyl groups preferentially transports the l-asparagine, whereas cage-2 attaching crown ether groups spontaneously favor transporting d-arginine. We therefore develop a new type of self-assembled system that can potentially mimic the functions of transmembrane proteins in nature, which is a realistic candidate for further biomedical applications.
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Affiliation(s)
- Yingguo Li
- School of Chemistry and Chemical Engineering, Frontiers Science Center for Transformative Molecules and State Key Laboratory of Metal Matrix Composites, Shanghai Jiao Tong University, Shanghai 200240, China
| | - Jinqiao Dong
- School of Chemistry and Chemical Engineering, Frontiers Science Center for Transformative Molecules and State Key Laboratory of Metal Matrix Composites, Shanghai Jiao Tong University, Shanghai 200240, China
| | - Wei Gong
- School of Chemistry and Chemical Engineering, Frontiers Science Center for Transformative Molecules and State Key Laboratory of Metal Matrix Composites, Shanghai Jiao Tong University, Shanghai 200240, China
| | - Xianhui Tang
- School of Chemistry and Chemical Engineering, Frontiers Science Center for Transformative Molecules and State Key Laboratory of Metal Matrix Composites, Shanghai Jiao Tong University, Shanghai 200240, China
| | - Yuhao Liu
- School of Chemistry and Chemical Engineering, Frontiers Science Center for Transformative Molecules and State Key Laboratory of Metal Matrix Composites, Shanghai Jiao Tong University, Shanghai 200240, China
| | - Yong Cui
- School of Chemistry and Chemical Engineering, Frontiers Science Center for Transformative Molecules and State Key Laboratory of Metal Matrix Composites, Shanghai Jiao Tong University, Shanghai 200240, China
| | - Yan Liu
- School of Chemistry and Chemical Engineering, Frontiers Science Center for Transformative Molecules and State Key Laboratory of Metal Matrix Composites, Shanghai Jiao Tong University, Shanghai 200240, China
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71
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Salam R, Chowdhury SM, Marshall SR, Gneid H, Busschaert N. Increasing membrane permeability of carboxylic acid-containing drugs using synthetic transmembrane anion transporters. Chem Commun (Camb) 2021; 57:13122-13125. [PMID: 34783329 DOI: 10.1039/d1cc02327f] [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
In this manuscript, we show that small-molecule-based anion transporters can significantly increase the permeability of carboxylic acid containing drugs across lipid bilayers of model vesicles. Due to the drug-like characteristics of the transporters, this finding could not only have implications for drug delivery, but also hints towards potential drug-drug and drug-food interactions.
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Affiliation(s)
- Rayhanus Salam
- Department of Chemistry, Tulane University, New Orleans, Louisiana 70118, USA.
| | | | - Sarah R Marshall
- Department of Chemistry, Tulane University, New Orleans, Louisiana 70118, USA.
| | - Hassan Gneid
- Department of Chemistry, Tulane University, New Orleans, Louisiana 70118, USA.
| | - Nathalie Busschaert
- Department of Chemistry, Tulane University, New Orleans, Louisiana 70118, USA.
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72
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Yang J, Yu G, Sessler JL, Shin I, Gale PA, Huang F. Artificial transmembrane ion transporters as potential therapeutics. Chem 2021. [DOI: 10.1016/j.chempr.2021.10.028] [Citation(s) in RCA: 16] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
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73
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McNaughton DA, To TYT, Hawkins BA, Hibbs DE, Gale PA. Delivering anion transporters to lipid bilayers in water. Org Biomol Chem 2021; 19:9624-9628. [PMID: 34709282 DOI: 10.1039/d1ob02041b] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/03/2023]
Abstract
Cyclodextrins have been employed as delivery agents for lipophilic anion transporters, which allow their incorporation into lipid bilayers without using an organic solvent or pre-incorporation.
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Affiliation(s)
| | - Tsz Ying Teresa To
- School of Chemistry (F11), The University of Sydney, NSW 2006, Australia. .,Chemistry, University of Southampton, Southampton, SO17 1BJ, UK
| | - Bryson A Hawkins
- School of Pharmacy, The University of Sydney, NSW 2006, Australia
| | - David E Hibbs
- School of Pharmacy, The University of Sydney, NSW 2006, Australia
| | - Philip A Gale
- School of Chemistry (F11), The University of Sydney, NSW 2006, Australia. .,The University of Sydney Nano Institute (Sydney Nano), The University of Sydney, NSW 2006, Australia
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74
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McNaughton DA, Macreadie LK, Gale PA. Acridinone-based anion transporters. Org Biomol Chem 2021; 19:9659-9674. [PMID: 34515286 DOI: 10.1039/d1ob01545a] [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
The arrangement of hydrogen bond donors around a central lipophilic scaffold has proven to be a successful strategy in the development of potent chloride transporters. In this work, we revisit an acridinone 1,9-bis(thio)urea motif which had previously shown promise as an anion sensor and expand the series of compounds by appending a variety of electron-withdrawing groups to the peripheral phenyl moieties. High levels of activity were achieved by the most effective compounds in the series, which facilitated strictly electroneutral transport.
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Affiliation(s)
| | - Lauren K Macreadie
- School of Chemistry (F11), The University of Sydney, NSW 2006, Australia.
| | - Philip A Gale
- School of Chemistry (F11), The University of Sydney, NSW 2006, Australia. .,The University of Sydney Nano Institute (SydneyNano), The University of Sydney, NSW 2006, Australia
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75
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Gilchrist AM, Wang P, Carreira-Barral I, Alonso-Carrillo D, Wu X, Quesada R, Gale PA. Supramolecular methods: the 8-hydroxypyrene-1,3,6-trisulfonic acid (HPTS) transport assay. Supramol Chem 2021. [DOI: 10.1080/10610278.2021.1999956] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
Affiliation(s)
| | - Patrick Wang
- School of Chemistry, The University of Sydney, Sydney, NSW 2006, Australia
| | | | | | - Xin Wu
- School of Chemistry, The University of Sydney, Sydney, NSW 2006, Australia
| | - Roberto Quesada
- Departmento De Química, Universidad De Burgos, Burgos, Spain
| | - Philip A. Gale
- School of Chemistry, The University of Sydney, Sydney, NSW 2006, Australia
- The University of Sydney Nano Institute (Sydney Nano), The University of Sydney, Sydney, NSW 2006, Australia
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76
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Kerckhoffs A, Bo Z, Penty SE, Duarte F, Langton MJ. Red-shifted tetra- ortho-halo-azobenzenes for photo-regulated transmembrane anion transport. Org Biomol Chem 2021; 19:9058-9067. [PMID: 34617944 DOI: 10.1039/d1ob01457a] [Citation(s) in RCA: 22] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
Abstract
Photo-responsive synthetic ion transporters are of interest as tools for studying transmembrane transport processes and have potential applications as targeted therapeutics, due to the possibility of spatiotemporal control and wavelength-dependent function. Here we report the synthesis of novel symmetric and non-symmetric red-shifted tetra-ortho-chloro- and tetra-ortho-fluoro azobenzenes, bearing pendant amine functionality. Functionalisation of the photo-switchable scaffolds with squaramide hydrogen bond donors enabled the preparation of a family of anion receptors, which act as photo-regulated transmembrane chloride transporters in response to green or red light. The subtle effects of chlorine/fluorine substitution, meta/para positioning of the anion receptors, and the use of more flexible linkers are explored. NMR titration experiments on the structurally diverse photo-switchable receptors reveal cooperative binding of chloride in the Z, but not E isomer, by the two squaramide binding sites. These results are supported by molecular dynamics simulations in explicit solvent and model membranes. We show that this intramolecular anion recognition leads to effective switching of transport activity in lipid bilayer membranes, in which optimal Z isomer activity is achieved using a combination of fluorine substitution and para-methylene spacer units.
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Affiliation(s)
- Aidan Kerckhoffs
- Department of Chemistry, University of Oxford, Chemistry Research Laboratory, 12 Mansfield Road, Oxford, OX1 3TA, UK.
| | - Zonghua Bo
- Department of Chemistry, University of Oxford, Chemistry Research Laboratory, 12 Mansfield Road, Oxford, OX1 3TA, UK.
| | - Samuel E Penty
- Department of Chemistry, University of Oxford, Chemistry Research Laboratory, 12 Mansfield Road, Oxford, OX1 3TA, UK.
| | - Fernanda Duarte
- Department of Chemistry, University of Oxford, Chemistry Research Laboratory, 12 Mansfield Road, Oxford, OX1 3TA, UK.
| | - Matthew J Langton
- Department of Chemistry, University of Oxford, Chemistry Research Laboratory, 12 Mansfield Road, Oxford, OX1 3TA, UK.
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77
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Humeniuk H, Gini A, Hao X, Coelho F, Sakai N, Matile S. Pnictogen-Bonding Catalysis and Transport Combined: Polyether Transporters Made In Situ. JACS AU 2021; 1:1588-1593. [PMID: 34723261 PMCID: PMC8549043 DOI: 10.1021/jacsau.1c00345] [Citation(s) in RCA: 27] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/10/2021] [Indexed: 05/16/2023]
Abstract
The combination of catalysis and transport across lipid bilayer membranes promises directional access to a solvent-free and structured nanospace that could accelerate, modulate, and, at best, enable new chemical reactions. To elaborate on these expectations, anion transport and catalysis with pnictogen and tetrel bonds are combined with polyether cascade cyclizations into bioinspired cation transporters. Characterized separately, synergistic anion and cation transporters of very high activity are identified. Combined for catalysis in membranes, cascade cyclizations are found to occur with a formal rate enhancement beyond one million compared to bulk solution and product formation is detected in situ as an increase in transport activity. With this operational system in place, intriguing perspectives open up to exploit all aspects of this unique nanospace for important chemical transformations.
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78
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Lohrman J, Pramanik S, Kaur S, Telikepalli H, Day VW, Bowman-James K. Hydrophilic and hydrophobic carboxamide pincers as anion hosts. Org Biomol Chem 2021; 19:8516-8520. [PMID: 34553743 DOI: 10.1039/d1ob01605a] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
Abstract
Hydrophobic and hydrophilic, monotopic and ditopic carboxamide pincer hosts containing ethyl, hexyl, 2-hydroxyethyl and 2-hydroxyethyl ethyl ether pendant arms were synthesized. Solubility trends indicated that solubilities in water or hydrocarbon solvents varied depending on the nature of the pendant arms. Binding constants for hydrophilic pincers were larger in general than their hydrophobic analogs. Significant synergistic binding effects for the ditopic hosts were not observed.
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Affiliation(s)
- Jessica Lohrman
- Department of Chemistry, University of Kansas, 1567 Irving Hill Road, Lawrence, Kansas 66045, USA.
| | - Subhamay Pramanik
- Department of Chemistry, University of Kansas, 1567 Irving Hill Road, Lawrence, Kansas 66045, USA.
| | - Sandeep Kaur
- Department of Chemistry, University of Kansas, 1567 Irving Hill Road, Lawrence, Kansas 66045, USA.
| | - Hanumaiah Telikepalli
- Department of Chemistry, University of Kansas, 1567 Irving Hill Road, Lawrence, Kansas 66045, USA.
| | - Victor W Day
- Department of Chemistry, University of Kansas, 1567 Irving Hill Road, Lawrence, Kansas 66045, USA.
| | - Kristin Bowman-James
- Department of Chemistry, University of Kansas, 1567 Irving Hill Road, Lawrence, Kansas 66045, USA.
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79
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Martínez-Crespo L, Halgreen L, Soares M, Marques I, Félix V, Valkenier H. Hydrazones in anion transporters: the detrimental effect of a second binding site. Org Biomol Chem 2021; 19:8324-8337. [PMID: 34523662 DOI: 10.1039/d1ob01279g] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/03/2023]
Abstract
Synthetic anion transporters can be developed using anion receptors that are able to bind the anion and stabilize it in the lipophilic interior of a bilayer membrane, and they usually contain functional groups with acidic NHs, such as ureas, thioureas and squaramides. To assess the suitability of acylhydrazones as a new functional group for the preparation of anion transporters, we have studied a family of thioureas functionalized with these and related functional groups. 1H NMR titrations and DFT calculations indicate that the thioureas bearing acylhydrazone groups behave as chloride receptors with two separate binding sites, of which the acylhydrazone binds weaker than the thiourea. Chloride transport studies show that the additional binding site has a detrimental effect on thiourea-based transporters, and this phenomenon is also observed for bis(thio)ureas with two separate binding sites. We propose that the presence of a second anion binding unit hinders the transport activity of the thiourea due to additional interactions with the phospholipids of the membrane. In agreement with this hypothesis, extensive molecular dynamics simulations suggest that the molecules will tend to be positioned in the water/lipid interface, driven by the interaction of the NHs of the thiourea and of the acylhydrazone groups with the POPC polar head groups and water molecules. Moreover, the interaction energies show that the poorest transporters have indeed the strongest interactions with the membrane phospholipids, inhibiting chloride transport. This detrimental effect of additional functional groups on transport activity should be considered when designing new ion transporters, unless these groups cooperatively promote anion recognition and transmembrane transport.
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Affiliation(s)
- Luis Martínez-Crespo
- Université Libre de Bruxelles (ULB), Engineering of Molecular NanoSystems, Ecole Polytechnique de Bruxelles, Avenue F.D. Roosevelt 50, CP165/64, B-1050 Brussels, Belgium.
| | - Lau Halgreen
- Université Libre de Bruxelles (ULB), Engineering of Molecular NanoSystems, Ecole Polytechnique de Bruxelles, Avenue F.D. Roosevelt 50, CP165/64, B-1050 Brussels, Belgium.
| | - Márcio Soares
- CICECO - Aveiro Institute of Materials, Department of Chemistry, University of Aveiro, 3810-193, Aveiro, Portugal.
| | - Igor Marques
- CICECO - Aveiro Institute of Materials, Department of Chemistry, University of Aveiro, 3810-193, Aveiro, Portugal.
| | - Vítor Félix
- CICECO - Aveiro Institute of Materials, Department of Chemistry, University of Aveiro, 3810-193, Aveiro, Portugal.
| | - Hennie Valkenier
- Université Libre de Bruxelles (ULB), Engineering of Molecular NanoSystems, Ecole Polytechnique de Bruxelles, Avenue F.D. Roosevelt 50, CP165/64, B-1050 Brussels, Belgium.
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80
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Utilizing an Amino Acid Scaffold to Construct Heteroditopic Receptors Capable of Interacting with Salts under Interfacial Conditions. Int J Mol Sci 2021; 22:ijms221910754. [PMID: 34639095 PMCID: PMC8509731 DOI: 10.3390/ijms221910754] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/29/2021] [Revised: 09/28/2021] [Accepted: 09/29/2021] [Indexed: 11/17/2022] Open
Abstract
A 4-nitro-L-phenylalanine scaffold was used to construct effective ion pair receptors capable of binding anions in an enhanced manner with the assistance of alkali metal cations. A benzocrown ether was linked to a receptor platform via the amide function so as to support the squaramide function in anion binding and to allow all three NHs to act simultaneously. The binding properties of the receptors were determined using UV-vis, 1H NMR, 2D NMR, and DOSY spectroscopy in MeCN and in the solid state by X-ray measurements. Ion pair receptor 2 was found to interact with the most strongly with salts, and the removal of its key structural elements was shown to hinder the receptor action. The amide proton was recognized to switch from having involvement in an intramolecular hydrogen bond to interacting with anions upon complexation. Apart from carboxylates, which promote deprotonation, and other monovalent salts creating 1:1 complexes with the receptor, more complex equilibria were established upon the complexation of 2 with sulfates. Receptor 2 was shown to be capable of the extraction of ion pairs from the aqueous to organic phase and of the cation-enhanced transport chloride and sulfate anions across a bulk chloroform membrane. These features may open the door for its use in regulating ion concertation under interfacial conditions and acting as a potential drug to treat channelopathies.
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81
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Ahmad M, Chattopadhayay S, Mondal D, Vijayakanth T, Talukdar P. Stimuli-Responsive Anion Transport through Acylhydrazone-Based Synthetic Anionophores. Org Lett 2021; 23:7319-7324. [PMID: 34519509 DOI: 10.1021/acs.orglett.1c02249] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Photoswitchable acylhydrazone-based synthetic anionophores are reported. Single-crystal X-ray structure and 1H NMR titration studies confirmed the chloride binding in solid and solution states. The ion transport activity of 1a was greatly attenuated through a phototriggered E to Z photoisomerization process, and the photoisomerized deactivated state showed high kinetic stability due to an intramolecular hydrogen bond. Switchable "OFF-ON" transport activity was achieved by the application of light and acid-catalyzed reactivation process.
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Affiliation(s)
- Manzoor Ahmad
- Department of Chemistry, Indian Institute of Science Education and Research Pune, Dr. Homi Bhabha Road, Pashan, Pune 411008, Maharashtra, India
| | - Sandip Chattopadhayay
- Department of Chemistry, Indian Institute of Science Education and Research Pune, Dr. Homi Bhabha Road, Pashan, Pune 411008, Maharashtra, India
| | - Debashis Mondal
- Department of Chemistry, Indian Institute of Science Education and Research Pune, Dr. Homi Bhabha Road, Pashan, Pune 411008, Maharashtra, India
| | - Thangavel Vijayakanth
- The Shmunis School of Biomedicine and Cancer Research, George S. Wise Faculty of Life Sciences, Tel Aviv University, Tel Aviv 6997801, Israel
| | - Pinaki Talukdar
- Department of Chemistry, Indian Institute of Science Education and Research Pune, Dr. Homi Bhabha Road, Pashan, Pune 411008, Maharashtra, India
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82
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Heravi T, Shen J, Johnson S, Asplund MC, Dearden DV. Halide Size-Selective Binding by Cucurbit[5]uril-Alkali Cation Complexes in the Gas Phase. J Phys Chem A 2021; 125:7803-7812. [PMID: 34492182 DOI: 10.1021/acs.jpca.1c05060] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Abstract
We report data that suggest complexes with alkali cations capping the portals of cucurbit[5]uril (CB[5]) bind halide anions size-selectively as observed in the gas phase: Cl- binds inside the CB[5] cavity, Br- is observed both inside and outside, and I- binds weakly outside. This is reflected in sustained off-resonance irradiation collision-induced dissociation (SORI-CID) experiments: all detected Cl- complexes dissociate at higher energies, and Br- complexes exhibit unusual bimodal dissociation behavior, with part of the ion population dissociating at very low energies and the remainder dissociating at significantly higher energies comparable to those observed for Cl-. Decoherence cross sections measured in SF6 using cross-sectional areas by Fourier transform ion cyclotron resonance techniques for [CB[5] + M2X]+ (M = Na, X = Cl or Br) are comparable to or less than that of [CB[5] + Na]+ over a wide energy range, suggesting that Cl- or Br- in these complexes are bound inside the CB[5] cavity. In contrast, [CB[5] + K2Br]+ has a cross section measured about 20% larger than that of [CB[5] + Na]+, suggesting external binding that may correspond with the weakly bound component seen in SORI. While I- complexes with alkali cation caps were not observed, alkaline earth iodides with CB[5] yielded complexes with cross sections 5-10% larger than that of [CB[5] + Na]+, suggesting externally bound iodide. Geometry optimization at the M06-2X/6-31+G* level of ab initio theory suggests that internal anion binding is energetically favored by approximately 50-200 kJ mol-1 over external binding; thus, the externally bound complexes observed experimentally must be due to large energetic barriers hindering the passing of large anions through the CB[5] portal, preventing access to the interior. Calculation of the barriers to anion egress using MMFF//M06-2X/6-31+G* theory supports this idea and suggests that the size-selective binding we observe is due to anion size-dependent differences in the barriers.
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Affiliation(s)
- Tina Heravi
- Department of Chemistry and Biochemistry, Brigham Young University, Provo, Utah 84602, United States
| | - Jiewen Shen
- Department of Chemistry and Biochemistry, Brigham Young University, Provo, Utah 84602, United States
| | - Spencer Johnson
- Department of Chemistry and Biochemistry, Brigham Young University, Provo, Utah 84602, United States
| | - Matthew C Asplund
- Department of Chemistry and Biochemistry, Brigham Young University, Provo, Utah 84602, United States
| | - David V Dearden
- Department of Chemistry and Biochemistry, Brigham Young University, Provo, Utah 84602, United States
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83
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Montis R, Aragoni MC, Arca M, Coles SJ, Lippolis V, Milia J, Orton JB, Pala L, Picci G, Pivetta T, Caltagirone C. Coordination Chemistry and Sensing Properties Towards Anions and Metal Ions of a Simple Fluorescent Urea. Eur J Inorg Chem 2021. [DOI: 10.1002/ejic.202100580] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
Affiliation(s)
- Riccardo Montis
- Università degli Studi di Urbino Carlo Bo Dipartimento di Scienze Pure e Applicate Laboratorio di Chimica Supramolecolare Via della Stazione 4 61029 Urbino Italy
| | - M. Carla Aragoni
- Università degli Studi di Cagliari Dipartimento di Scienze Chimiche e Geologiche Bivio per Sestu S. S. 554 09042 Monserrato CA Italy
| | - Massimiliano Arca
- Università degli Studi di Cagliari Dipartimento di Scienze Chimiche e Geologiche Bivio per Sestu S. S. 554 09042 Monserrato CA Italy
| | - Simon J. Coles
- Chemistry University of Southampton Highfield Southampton SO17 1BJ UK
| | - Vito Lippolis
- Università degli Studi di Cagliari Dipartimento di Scienze Chimiche e Geologiche Bivio per Sestu S. S. 554 09042 Monserrato CA Italy
| | - Jessica Milia
- Università degli Studi di Cagliari Dipartimento di Scienze Chimiche e Geologiche Bivio per Sestu S. S. 554 09042 Monserrato CA Italy
| | - James B. Orton
- Chemistry University of Southampton Highfield Southampton SO17 1BJ UK
| | - Laura Pala
- Università degli Studi di Cagliari Dipartimento di Scienze Chimiche e Geologiche Bivio per Sestu S. S. 554 09042 Monserrato CA Italy
| | - Giacomo Picci
- Università degli Studi di Cagliari Dipartimento di Scienze Chimiche e Geologiche Bivio per Sestu S. S. 554 09042 Monserrato CA Italy
| | - Tiziana Pivetta
- Università degli Studi di Cagliari Dipartimento di Scienze Chimiche e Geologiche Bivio per Sestu S. S. 554 09042 Monserrato CA Italy
| | - Claudia Caltagirone
- Università degli Studi di Cagliari Dipartimento di Scienze Chimiche e Geologiche Bivio per Sestu S. S. 554 09042 Monserrato CA Italy
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84
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Bickerton LE, Johnson TG, Kerckhoffs A, Langton MJ. Supramolecular chemistry in lipid bilayer membranes. Chem Sci 2021; 12:11252-11274. [PMID: 34567493 PMCID: PMC8409493 DOI: 10.1039/d1sc03545b] [Citation(s) in RCA: 39] [Impact Index Per Article: 13.0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/29/2021] [Accepted: 07/26/2021] [Indexed: 01/03/2023] Open
Abstract
Lipid bilayer membranes form compartments requisite for life. Interfacing supramolecular systems, including receptors, catalysts, signal transducers and ion transporters, enables the function of the membrane to be controlled in artificial and living cellular compartments. In this perspective, we take stock of the current state of the art of this rapidly expanding field, and discuss prospects for the future in both fundamental science and applications in biology and medicine.
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Affiliation(s)
- Laura E Bickerton
- Department of Chemistry, University of Oxford Chemistry Research Laboratory 12 Mansfield Road Oxford OX1 3TA UK
| | - Toby G Johnson
- Department of Chemistry, University of Oxford Chemistry Research Laboratory 12 Mansfield Road Oxford OX1 3TA UK
| | - Aidan Kerckhoffs
- Department of Chemistry, University of Oxford Chemistry Research Laboratory 12 Mansfield Road Oxford OX1 3TA UK
| | - Matthew J Langton
- Department of Chemistry, University of Oxford Chemistry Research Laboratory 12 Mansfield Road Oxford OX1 3TA UK
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85
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Parman E, Lõkov M, Järviste R, Tshepelevitsh S, Semenov NA, Chulanova EA, Salnikov GE, Prima DO, Slizhov YG, Leito I, Zibarev AV. Acid-Base and Anion Binding Properties of Tetrafluorinated 1,3-Benzodiazole, 1,2,3-Benzotriazole and 2,1,3-Benzoselenadiazole. Chemphyschem 2021; 22:2329-2335. [PMID: 34397136 DOI: 10.1002/cphc.202100475] [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: 06/21/2021] [Revised: 07/30/2021] [Indexed: 11/06/2022]
Abstract
The influence of fluorination on the acid-base properties and the capacity of structurally related 6-5 bicyclic compounds - 1,3-benzodiazole 1, 1,2,3-benzotriazole 2 and 2,1,3-benzoselenadiazole 3 to σ-hole interactions, i. e. hydrogen (1 and 2) and chalcogen (3) bondings, is studied experimentally and computationally. The tetrafluorination increases the Brønsted acidity of the diazole and triazole scaffolds and the Lewis acidity of selenadiazole scaffold decreases the basicity. Increased Brønsted acidity facilitates anion binding via the formation of hydrogen bonds; particularly, tetrafluorinated derivative of 1 (compound 4) binds Cl- . Increased Lewis acidity of tetrafluorinated derivative of 3 (compound 10), however, is not enough for binding with Cl- and F- via chalcogen bonds in contrast to previously studied Te analog of 10. It is suggested that the maximum positive values of molecular electrostatic potential at the σ-holes, VS,max , can be a reasonable metric for design and synthesis of new anion receptors with selenadiazole-diazole/triazole hybrids as a special target. Related chlorinated compounds are also discussed.
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Affiliation(s)
- Elisabeth Parman
- Institute of Chemistry, University of Tartu, Ravila 14a, 50411, Tartu, Estonia
| | - Märt Lõkov
- Institute of Chemistry, University of Tartu, Ravila 14a, 50411, Tartu, Estonia
| | - Robert Järviste
- Institute of Chemistry, University of Tartu, Ravila 14a, 50411, Tartu, Estonia
| | - Sofja Tshepelevitsh
- Institute of Chemistry, University of Tartu, Ravila 14a, 50411, Tartu, Estonia
| | - Nikolay A Semenov
- Institute of Organic Chemistry, Siberian Branch, Russian Academy of Sciences, 9 Lavrentiev Avenue, 630090, Novosibirsk, Russia
| | - Elena A Chulanova
- Institute of Organic Chemistry, Siberian Branch, Russian Academy of Sciences, 9 Lavrentiev Avenue, 630090, Novosibirsk, Russia
| | - Georgy E Salnikov
- Institute of Organic Chemistry, Siberian Branch, Russian Academy of Sciences, 9 Lavrentiev Avenue, 630090, Novosibirsk, Russia
| | - Darya O Prima
- Institute of Organic Chemistry, Siberian Branch, Russian Academy of Sciences, 9 Lavrentiev Avenue, 630090, Novosibirsk, Russia.,Present address: Institute of Organic Chemistry, Russian Academy of Sciences, 47 Leninsky Avenue, 119991, Moscow, Russia
| | - Yuri G Slizhov
- Department of Chemistry, National Research University - Tomsk State University, 36 Lenin Avenue, 634050, Tomsk, Russia
| | - Ivo Leito
- Institute of Chemistry, University of Tartu, Ravila 14a, 50411, Tartu, Estonia
| | - Andrey V Zibarev
- Institute of Organic Chemistry, Siberian Branch, Russian Academy of Sciences, 9 Lavrentiev Avenue, 630090, Novosibirsk, Russia
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86
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Bickerton LE, Docker A, Sterling AJ, Kuhn H, Duarte F, Beer PD, Langton MJ. Highly Active Halogen Bonding and Chalcogen Bonding Chloride Transporters with Non-Protonophoric Activity. Chemistry 2021; 27:11738-11745. [PMID: 34014001 PMCID: PMC8453555 DOI: 10.1002/chem.202101681] [Citation(s) in RCA: 37] [Impact Index Per Article: 12.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/12/2021] [Indexed: 12/14/2022]
Abstract
Synthetic anion transporters show much promise as potential anti-cancer agents and therapeutics for diseases associated with mis-regulation of protein anion channels. In such applications high activity and anion selectivity are crucial to overcome competing proton or hydroxide transport which dissipates cellular pH gradients. Here, highly active bidentate halogen bonding and chalcogen bonding anion carriers based on electron deficient iodo- and telluromethyl-triazole derivatives are reported. Anion transport experiments in lipid bilayer vesicles reveal record nanomolar chloride transport activity for the bidentate halogen bonding anion carrier, and remarkably high chloride over proton/hydroxide selectivity for the chalcogen bonding anionophore. Computational studies provide further insight into the role of sigma-hole mediated anion recognition and desolvation at the membrane interface. Comparison with hydrogen bonding analogues demonstrates the importance of employing sigma-hole donor motifs in synthetic anionophores for achieving both high transport activity and selectivity.
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Affiliation(s)
- Laura E. Bickerton
- Department of Chemistry Chemistry Research LaboratoryUniversity of OxfordMansfield RoadOxfordOX1 3TAUK
| | - Andrew Docker
- Department of Chemistry Chemistry Research LaboratoryUniversity of OxfordMansfield RoadOxfordOX1 3TAUK
| | - Alistair J. Sterling
- Department of Chemistry Chemistry Research LaboratoryUniversity of OxfordMansfield RoadOxfordOX1 3TAUK
| | - Heike Kuhn
- Department of Chemistry Chemistry Research LaboratoryUniversity of OxfordMansfield RoadOxfordOX1 3TAUK
| | - Fernanda Duarte
- Department of Chemistry Chemistry Research LaboratoryUniversity of OxfordMansfield RoadOxfordOX1 3TAUK
| | - Paul D. Beer
- Department of Chemistry Chemistry Research LaboratoryUniversity of OxfordMansfield RoadOxfordOX1 3TAUK
| | - Matthew J. Langton
- Department of Chemistry Chemistry Research LaboratoryUniversity of OxfordMansfield RoadOxfordOX1 3TAUK
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87
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Lv S, Li X, Yang L, Ren H, Jiang J. Computational design of photoswitchable anion receptors: Red-shifted and bistable di-ortho-fluoro di-ortho-chloro azobenzene derivatives. Chem Phys 2021. [DOI: 10.1016/j.chemphys.2021.111246] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
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88
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Chen D, Xu Q, Wang W, Shao J, Huang W, Dong X. Type I Photosensitizers Revitalizing Photodynamic Oncotherapy. SMALL (WEINHEIM AN DER BERGSTRASSE, GERMANY) 2021; 17:e2006742. [PMID: 34038611 DOI: 10.1002/smll.202006742] [Citation(s) in RCA: 141] [Impact Index Per Article: 47.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/28/2020] [Revised: 11/19/2020] [Indexed: 05/11/2023]
Abstract
Photodynamic therapy (PDT) has shown great potential for tumor treatment with merits of non-invasiveness, high selectivity, and minimal side effects. However, conventional type II PDT relying on 1 O2 presents poor therapeutic efficacy for hypoxic tumors due to the oxygen-dependent manner. Alternatively, emerging researches have demonstrated that type I PDT exhibits superiority over type II PDT in tumor treatment owing to its diminished oxygen-dependence. In this review, state-of-the-art studies concerning recent progress in type I photosensitizers are scrutinized, emphasizing the strategies to construct highly effective type I photosensitizers. As the foundation, basic principles of type I PDT are presented, and up-to-date type I photosensitizers are summarized and classified based on their attributes. Then, a literature review of representative type I photosensitizers (including nanomaterials and small molecules) is presented with impetus to delineate their novel designs, action mechanisms, as well as anticancer PDT applications. Finally, the remaining challenges and development directions of type I photosensitizers are outlined, highlighting key scientific issues toward clinical translations.
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Affiliation(s)
- Dapeng Chen
- Nanjing Tech University (NanjingTech), Nanjing, 210009, China
| | - Qian Xu
- Nanjing Tech University (NanjingTech), Nanjing, 210009, China
| | - Wenjun Wang
- Liaocheng University, Liaocheng, 252059, China
| | - Jinjun Shao
- Nanjing Tech University (NanjingTech), Nanjing, 210009, China
| | - Wei Huang
- Northwestern Polytechnical University (NPU), Xi'an, 710072, China
| | - Xiaochen Dong
- Nanjing Tech University (NanjingTech), Nanjing, 210009, China
- Nanjing University of Information Science and Technology, Nanjing, 210044, China
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89
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Mondal A, Malla JA, Paithankar H, Sharma S, Chugh J, Talukdar P. A Pyridyl-Linked Benzimidazolyl Tautomer Facilitates Prodigious H +/Cl - Symport through a Cooperative Protonation and Chloride Ion Recognition. Org Lett 2021; 23:6131-6136. [PMID: 34319120 DOI: 10.1021/acs.orglett.1c02235] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
We report two pyridyl-linked benzimidazolyl hydrazones as HCl cotransporters that are 5 and 2 times superior to prodigiosin, a natural product whose transport efficiency has never been routed by synthetic molecules. These hydrazones provide a suitable HCl binding site through a cooperative protonation and chloride ion recognition. HCl transport by the most active compound induces lysosome deacidification. Viability assays confirmed that the compounds induce cytotoxicity toward human breast cancer MCF-7 cells but are relatively nontoxic toward noncancerous HEK293T cells.
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Affiliation(s)
- Abhishek Mondal
- Department of Chemistry, Indian Institute of Science Education and Research Pune, Dr. Homi Bhabha Road, Pashan, Pune, 411008 Maharashtra, India
| | - Javid Ahmad Malla
- Department of Chemistry, Indian Institute of Science Education and Research Pune, Dr. Homi Bhabha Road, Pashan, Pune, 411008 Maharashtra, India
| | - Harshad Paithankar
- Department of Chemistry, Indian Institute of Science Education and Research Pune, Dr. Homi Bhabha Road, Pashan, Pune, 411008 Maharashtra, India
| | - Shilpy Sharma
- Department of Biotechnology, Savitribai Phule Pune University, Pune, 411007 Maharashtra, India
| | - Jeetender Chugh
- Department of Chemistry, Indian Institute of Science Education and Research Pune, Dr. Homi Bhabha Road, Pashan, Pune, 411008 Maharashtra, India.,Department of Biology, Indian Institute of Science Education and Research Pune, Dr. Homi Bhabha Road, Pashan, Pune, 411008 Maharashtra, India
| | - Pinaki Talukdar
- Department of Chemistry, Indian Institute of Science Education and Research Pune, Dr. Homi Bhabha Road, Pashan, Pune, 411008 Maharashtra, India
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90
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Affiliation(s)
- Patrick Wang
- School of Chemistry, The University of Sydney, NSW, Australia
| | - Xin Wu
- School of Chemistry, The University of Sydney, NSW, Australia
| | - Philip A. Gale
- School of Chemistry, The University of Sydney, NSW, Australia
- The University of Sydney Nano Institute (SydneyNano), The University of Sydney, NSW, Australia
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91
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Ustrnul L, Burankova T, Öeren M, Juhhimenko K, Ilmarinen J, Siilak K, Mishra KA, Aav R. Binding Between Cyclohexanohemicucurbit[ n]urils and Polar Organic Guests. Front Chem 2021; 9:701028. [PMID: 34262895 PMCID: PMC8273652 DOI: 10.3389/fchem.2021.701028] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/27/2021] [Accepted: 06/07/2021] [Indexed: 11/13/2022] Open
Abstract
Inherently chiral, barrel-shaped, macrocyclic hosts such as cyclohexanohemicucurbit[n]urils (cycHC[n]) bind zinc porphyrins and trifluoroacetic acid externally in halogenated solvents. In the current study, we tested a set of eighteen organic guests with various functional groups and polarity, namely, thiophenols, phenols, and carboxylic and sulfonic acids, to identify a preference toward hydrogen bond–donating molecules for homologous cycHC[6] and cycHC[8]. Guests were characterized by Hirshfeld partial charges on acidic hydrogens and their binding by 1H and 19F NMR titrations. Evaluation of association constants revealed the complexity of the system and indirectly proved an external binding with stoichiometry over 2:1 for both homologs. It was found that overall binding strength is influenced by the stoichiometry of the formed complexes, the partial atomic charge on the hydrogen atom of the hydrogen bond donor, and the bulkiness of the guest. Additionally, a study on the formation of complexes with halogen anions (Cl− and Br−) in methanol and chloroform, analyzed by 1H NMR, did not confirm complexation. The current study widens the scope of potential applications for host molecules by demonstrating the formation of hydrogen-bonded complexes with multisite hydrogen bond acceptors such as cycHC[6] and cycHC[8].
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Affiliation(s)
- Lukas Ustrnul
- Department of Chemistry and Biotechnology, School of Science, Tallinn University of Technology, Tallinn, Estonia
| | | | - Mario Öeren
- Optibrium Limited, Cambridge, United Kingdom
| | - Kristina Juhhimenko
- Department of Chemistry and Biotechnology, School of Science, Tallinn University of Technology, Tallinn, Estonia
| | - Jenni Ilmarinen
- Department of Chemistry and Biotechnology, School of Science, Tallinn University of Technology, Tallinn, Estonia
| | - Kristjan Siilak
- Department of Chemistry and Biotechnology, School of Science, Tallinn University of Technology, Tallinn, Estonia
| | - Kamini A Mishra
- Department of Chemistry and Biotechnology, School of Science, Tallinn University of Technology, Tallinn, Estonia
| | - Riina Aav
- Department of Chemistry and Biotechnology, School of Science, Tallinn University of Technology, Tallinn, Estonia
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92
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Wu X, Deng J, Guo G, Zheng Y, Xiong Q, Zheng T, Zhao X, Yu Z. Spatiotemporal Resolved Live Cell Membrane Tracking through Photo-click Reactions Enriched in Lipid Phase. Chemistry 2021; 27:11957-11965. [PMID: 34057766 DOI: 10.1002/chem.202101653] [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: 05/10/2021] [Indexed: 01/04/2023]
Abstract
A set of photo-switchable monopeptides derived from cis-β-dibenzodiazocine-l-alanine (cis-DBDAA) have been designed and synthesized, which are capable of photo-click reacting with diaryltetrazoles or diarylsydnones in a hydrophobic phospholipid bilayer environment. The DBDAA monopeptides include both a hydrophobic tail on C-terminal, providing high affinity toward lipid membrane, and a modularized functional moiety on N-terminal, enabling rapid optimization of the self-assembly strength to form multifunctional supramolecules. With the cis-DBDAA monopeptides photo-switched into trans-configuration, we were able to disrupt the supramolecular assembly through an efficient photo-click reaction across the lipid bilayer of liposomes. We reveal that the performance of the photo-click reactions between the monopeptides and photo-generated nitrile imine intermediates is significantly enhanced by enrichment of both reactants in the hydrophobic membrane lamel of liposomes. Enrichment of the DBDAA monopeptide in lipid phase serves as a convenient method to introduce bioorthogonal chemical handles on live cell membranes, which enables fluorescence labelling of single cell's membrane with high spatiotemporal resolution to facilitate the studies on cell membrane dynamics.
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Affiliation(s)
- Xueting Wu
- Key Laboratory of Green Chemistry and Technology of Ministry of Education, College of Chemistry, Sichuan University, 29 Wangjiang Road, Chengdu, 610064, P. R. China
| | - Jiajie Deng
- Key Laboratory of Green Chemistry and Technology of Ministry of Education, College of Chemistry, Sichuan University, 29 Wangjiang Road, Chengdu, 610064, P. R. China
| | - Guiling Guo
- Key Laboratory of Green Chemistry and Technology of Ministry of Education, College of Chemistry, Sichuan University, 29 Wangjiang Road, Chengdu, 610064, P. R. China
| | - Yuanqin Zheng
- Key Laboratory of Green Chemistry and Technology of Ministry of Education, College of Chemistry, Sichuan University, 29 Wangjiang Road, Chengdu, 610064, P. R. China
| | - Qin Xiong
- Key Laboratory of Green Chemistry and Technology of Ministry of Education, College of Chemistry, Sichuan University, 29 Wangjiang Road, Chengdu, 610064, P. R. China
| | - Tingting Zheng
- Key Laboratory of Green Chemistry and Technology of Ministry of Education, College of Chemistry, Sichuan University, 29 Wangjiang Road, Chengdu, 610064, P. R. China
| | - Xiaohu Zhao
- Key Laboratory of Green Chemistry and Technology of Ministry of Education, College of Chemistry, Sichuan University, 29 Wangjiang Road, Chengdu, 610064, P. R. China
| | - Zhipeng Yu
- Key Laboratory of Green Chemistry and Technology of Ministry of Education, College of Chemistry, Sichuan University, 29 Wangjiang Road, Chengdu, 610064, P. R. China
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93
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Maslowska-Jarzyna K, Korczak ML, Chmielewski MJ. Boosting Anion Transport Activity of Diamidocarbazoles by Electron Withdrawing Substituents. Front Chem 2021; 9:690035. [PMID: 34095089 PMCID: PMC8172623 DOI: 10.3389/fchem.2021.690035] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/01/2021] [Accepted: 04/26/2021] [Indexed: 12/17/2022] Open
Abstract
Artificial chloride transporters have been intensely investigated in view of their potential medicinal applications. Recently, we have established 1,8-diamidocarbazoles as a versatile platform for the development of active chloride carriers. In the present contribution, we investigate the influence of various electron-withdrawing substituents in positions 3 and 6 of the carbazole core on the chloride transport activity of these anionophores. Using lucigenin assay and large unilamellar vesicles as models, the 3,6-dicyano- and 3,6-dinitro- substituted receptors were found to be highly active and perfectly deliverable chloride transporters, with EC50,270s value as low as 22 nM for the Cl-/NO3 - exchange. Mechanistic studies revealed that diamidocarbazoles form 1:1 complexes with chloride in lipid bilayers and facilitate chloride/nitrate exchange by carrier mechanism. Furthermore, owing to its increased acidity, the 3,6-dinitro- substituted receptor acts as a pH-switchable transporter, with physiologically relevant apparent pKa of 6.4.
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Affiliation(s)
| | | | - Michał J. Chmielewski
- Faculty of Chemistry, Biological and Chemical Research Centre, University of Warsaw, Warsaw, Poland
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94
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95
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Phenylethynylbenzyl-modified biguanides inhibit pancreatic cancer tumor growth. Sci Rep 2021; 11:9854. [PMID: 33972583 PMCID: PMC8110578 DOI: 10.1038/s41598-021-87993-3] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/02/2019] [Accepted: 04/05/2021] [Indexed: 11/08/2022] Open
Abstract
We present the design and synthesis of a small library of substituted biguanidium salts and their capacity to inhibit the growth of pancreatic cancer cells. We first present their in vitro and membrane activity, before we address their mechanism of action in living cells and in vivo activity. We show that phenylethynyl biguanidium salts possess higher ability to cross hydrophobic barriers, improve mitochondrial accumulation and anticancer activity. Mechanistically, the most active compound, 1b, like metformin, activated AMPK, decreased the NAD+/NADH ratio and mitochondrial respiration, but at 800-fold lower concentration. In vivo studies show that compound 1b significantly inhibits the growth of pancreatic cancer xenografts in mice, while biguanides currently in clinical trials had little activity.
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96
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Jagleniec D, Wilczek M, Romański J. Tripodal, Squaramide-Based Ion Pair Receptor for Effective Extraction of Sulfate Salt. Molecules 2021; 26:2751. [PMID: 34067071 PMCID: PMC8125518 DOI: 10.3390/molecules26092751] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/20/2021] [Revised: 05/01/2021] [Accepted: 05/05/2021] [Indexed: 11/20/2022] Open
Abstract
Combining three features-the high affinity of squaramides toward anions, cooperation in ion pair binding and preorganization of the binding domains in the tripodal platform-led to the effective receptor 2. The lack of at least one of these key elements in the structures of reference receptors 3 and 4 caused a lower affinity towards ion pairs. Receptor 2 was found to form an intramolecular network in wet chloroform, which changed into inorganic-organic associates after contact with ions and allowed salts to be extracted from an aqueous to an organic phase. The disparity in the binding mode of 2 with sulfates and with other monovalent anions led to the selective extraction of extremely hydrated sulfate anions in the presence of more lipophilic salts, thus overcoming the Hofmeister series.
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Affiliation(s)
| | | | - Jan Romański
- Faculty of Chemistry, University of Warsaw, Pasteura 1, 02-093 Warsaw, Poland; (D.J.); (M.W.)
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97
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Martínez‐Crespo L, Hewitt SH, De Simone NA, Šindelář V, Davis AP, Butler S, Valkenier H. Transmembrane Transport of Bicarbonate Unravelled*. Chemistry 2021; 27:7367-7375. [PMID: 33932059 PMCID: PMC8251953 DOI: 10.1002/chem.202100491] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/08/2021] [Indexed: 02/06/2023]
Abstract
Anion receptors can be used to transport ions across lipid bilayers, which has potential for therapeutic applications. Synthetic bicarbonate transporters are of particular interest, as defects in transmembrane transport of bicarbonate are associated with various diseases. However, no convenient method exists to directly observe bicarbonate transport and study the mechanisms involved. Here, an assay is presented that allows the kinetics of bicarbonate transport into liposomes to be monitored directly and with great sensitivity. The assay utilises an encapsulated europium(III) complex, which exhibits a large increase in emission intensity upon binding bicarbonate. Mechanisms involving CO2 diffusion and the dissipation of a pH gradient are shown to be able to lead to an increase in bicarbonate concentration within liposomes, without transport of the anion occurring at all. By distinguishing these alternative mechanisms from actual bicarbonate transport, this assay will inform the future development of bicarbonate transporters.
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Affiliation(s)
- Luis Martínez‐Crespo
- Université Libre de Bruxelles (ULB)Engineering of Molecular NanoSystems, Ecole polytechnique de BruxellesAvenue F.D. Roosevelt 50, CP165/641050BrusselsBelgium
| | - Sarah H. Hewitt
- Loughborough UniversityDepartment of ChemistryEpinal WayLoughboroughLE11 3TUUK
| | | | - Vladimír Šindelář
- Masaryk UniversityDepartment of Chemistry and RECETOX, Faculty of ScienceKamenice 5625 00BrnoCzech Republic
| | - Anthony P. Davis
- University of BristolSchool of ChemistryCantock's CloseBristolBS8 1TSUK
| | - Stephen Butler
- Loughborough UniversityDepartment of ChemistryEpinal WayLoughboroughLE11 3TUUK
| | - Hennie Valkenier
- Université Libre de Bruxelles (ULB)Engineering of Molecular NanoSystems, Ecole polytechnique de BruxellesAvenue F.D. Roosevelt 50, CP165/641050BrusselsBelgium
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98
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Krishnaveni K, Gurusamy S, Sathish V, Thanasekaran P, Mathavan A. Selective anions mediated fluorescence "turn-on", aggregation induced emission (AIE) and lysozyme targeting properties of pyrene-naphthalene sulphonyl conjugate. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2021; 252:119537. [PMID: 33611147 DOI: 10.1016/j.saa.2021.119537] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/19/2020] [Revised: 01/08/2021] [Accepted: 01/24/2021] [Indexed: 06/12/2023]
Abstract
We have designed and synthesized a novel pyrene-naphthalene sulphonyl conjugate, 1-((1Z)-(4-((Z)-4-(pyrene-1-yl)methyleneamino)phenylsulfonyl)phenylimino)methyl)naphthalene-2-ol (PSN) through a facile two-step reactions. It was characterized by various spectral techniques. Fluorescence spectral studies showed that compound PSN featured fluorescence enhancement upon increasing the water content in THF. This can be attributed to the phenomena of aggregated induced emission (AIE), which is confirmed by SEM and AFM studies, due to the restriction of CHN isomerization of PSN. The anion sensing of PSN was examined with various anions. Among these anions, H2PO4- and F- ions were selectively sensing with a low detection limit of 3.52 × 10-7 M and 7.23 × 10-7 M, respectively, and an obvious color change from yellow to orange was observed by the naked eye. The mechanism of sensing involved the formation of hydrogen bonding interaction between O-H group of PSN and H2PO4-/ F- ions. The binding of PSN with LYZ was also examined by docking studies, which shows that H-bonding and hydrophobic interactions play crucial roles for the interaction of LYZ toward PSN.
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Affiliation(s)
- Kumar Krishnaveni
- PG and Research Department of Chemistry, V. O. Chidambaram College, Tuticorin - 628 008, Tamil Nadu, India; Reg. NO:17212232032004, PG and Research Department of Chemistry, V. O. Chidambaram College, Tuticorin - 628 008, Tamil Nadu, India. Affiliated by Manonmaniam Sundaranar University, Abishekapatti, Tirunelveli - 627 012, Tamil Nadu, India
| | - Shunmugasundaram Gurusamy
- PG and Research Department of Chemistry, V. O. Chidambaram College, Tuticorin - 628 008, Tamil Nadu, India; Reg. NO:17212232031003, PG and Research Department of Chemistry, V. O. Chidambaram College, Tuticorin - 628 008, Tamil Nadu, India. Affiliated by Manonmaniam Sundaranar University, Abishekapatti, Tirunelveli - 627 012, Tamil Nadu, India
| | - Veerasamy Sathish
- Department of Chemistry, Bannari Amman Institute of Technology, Sathyamangalam - 638 401, India.
| | - Pounraj Thanasekaran
- Department of Chemistry, Fu Jen Catholic University, New Taipei City 242, Taiwan.
| | - Alagarsamy Mathavan
- PG and Research Department of Chemistry, V. O. Chidambaram College, Tuticorin - 628 008, Tamil Nadu, India.
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Chen H, Liu Y, Cheng X, Fang S, Sun Y, Yang Z, Zheng W, Ji X, Wu Z. Self‐Assembly of Size‐Controlled
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‐Pyridine–Urea Oligomers and Their Biomimetic Chloride Ion Channels. Angew Chem Int Ed Engl 2021. [DOI: 10.1002/ange.202102174] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Affiliation(s)
- Hualong Chen
- Beijing Institute of Brain Disorders Laboratory of Brain Disorders Ministry of Science and Technology Collaborative Innovation Center for Brain Disorders Beijing Advanced Innovation Center for Big Data-based Precision Medicine Capital Medical University Beijing 100069 China
| | - Yajing Liu
- School of Pharmaceutical Science Capital Medical University Beijing 100069 China
| | - Xuebo Cheng
- Beijing Institute of Brain Disorders Laboratory of Brain Disorders Ministry of Science and Technology Collaborative Innovation Center for Brain Disorders Beijing Advanced Innovation Center for Big Data-based Precision Medicine Capital Medical University Beijing 100069 China
| | - Senbiao Fang
- School of Computer Science and Engineering Central South University Changsha 410012 China
| | - Yuli Sun
- Beijing Institute of Brain Disorders Laboratory of Brain Disorders Ministry of Science and Technology Collaborative Innovation Center for Brain Disorders Beijing Advanced Innovation Center for Big Data-based Precision Medicine Capital Medical University Beijing 100069 China
| | - Zequn Yang
- Beijing Institute of Brain Disorders Laboratory of Brain Disorders Ministry of Science and Technology Collaborative Innovation Center for Brain Disorders Beijing Advanced Innovation Center for Big Data-based Precision Medicine Capital Medical University Beijing 100069 China
| | - Wei Zheng
- Beijing Institute of Brain Disorders Laboratory of Brain Disorders Ministry of Science and Technology Collaborative Innovation Center for Brain Disorders Beijing Advanced Innovation Center for Big Data-based Precision Medicine Capital Medical University Beijing 100069 China
| | - Xunming Ji
- Beijing Institute of Brain Disorders Laboratory of Brain Disorders Ministry of Science and Technology Collaborative Innovation Center for Brain Disorders Beijing Advanced Innovation Center for Big Data-based Precision Medicine Capital Medical University Beijing 100069 China
- Institute of Hypoxia Medicine Xuanwu Hospital Capital Medical University Beijing 100053 China
| | - Zehui Wu
- Beijing Institute of Brain Disorders Laboratory of Brain Disorders Ministry of Science and Technology Collaborative Innovation Center for Brain Disorders Beijing Advanced Innovation Center for Big Data-based Precision Medicine Capital Medical University Beijing 100069 China
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Hong XQ, Xing YY, Wang ZK, Mao QC, Chen WH. Curvature-regulated transmembrane anion transport by a trifluoromethylated bisbenzimidazole. CHINESE CHEM LETT 2021. [DOI: 10.1016/j.cclet.2021.01.005] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
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