1
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Zhang W, Zhao C, Zhu W, He X, Zhao Y. Conformational Locking as a Strategy to Reverse Ion Recognition Selectivity. J Org Chem 2024; 89:4037-4041. [PMID: 38389323 DOI: 10.1021/acs.joc.3c02902] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/24/2024]
Abstract
This study delves into the ion recognition capabilities of a novel host molecule, emphasizing the role of conformational locking in dictating ion selectivity. By employing the Buchwald-Hartwig cross-coupling reaction, we have notably shifted the ion receptor's selectivity from K+ to Na+. The findings are supported by computational simulations that reveal differences in binding energies and molecular strain impacting ion recognition. This innovative structural modification broadens the scope for alterations at the calix[4]arene's lower rim, paving the way for new methods and strategies in modulating ion recognition selectivity.
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Affiliation(s)
- Wei Zhang
- College of Chemistry and Materials Science, Sichuan Normal University, Chengdu 610068, China
- Key Laboratory of Organofluorine Chemistry, Shanghai Institute of Organic Chemistry, University of Chinese Academy of Sciences, Chinese Academy of Sciences, Shanghai 200032, China
| | - Chong Zhao
- Shanghai Engineering Research Center of Molecular Therapeutics and New Drug Development, Shanghai Frontiers Science Center of Molecule Intelligent Syntheses, School of Chemistry and Molecular Engineering, East China Normal University, Shanghai 200062, China
| | - Wenjie Zhu
- Key Laboratory of Organofluorine Chemistry, Shanghai Institute of Organic Chemistry, University of Chinese Academy of Sciences, Chinese Academy of Sciences, Shanghai 200032, China
| | - Xiao He
- Shanghai Engineering Research Center of Molecular Therapeutics and New Drug Development, Shanghai Frontiers Science Center of Molecule Intelligent Syntheses, School of Chemistry and Molecular Engineering, East China Normal University, Shanghai 200062, China
| | - Yanchuan Zhao
- College of Chemistry and Materials Science, Sichuan Normal University, Chengdu 610068, China
- Key Laboratory of Organofluorine Chemistry, Shanghai Institute of Organic Chemistry, University of Chinese Academy of Sciences, Chinese Academy of Sciences, Shanghai 200032, China
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2
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Hirata K, Sato E, Lisy JM, Ishiuchi SI, Fujii M. Cation-responsive cavity expansion of valinomycin revealed by cryogenic ion trap infrared spectroscopy. Phys Chem Chem Phys 2023; 25:1075-1080. [PMID: 36519454 DOI: 10.1039/d2cp04570b] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
Valinomycin (VM) is a natural K+-selective ionophore that transports K+ through the cell membrane. VM captures K+ in its central cavity with a C3-symmetric β-turn-like backbone. Although the binding affinity is drastically decreased for the VM-sodium (Na+VM) complex with respect to K+VM, VM holds relatively high affinity to Rb+ and Cs+. The high affinity for larger ions irrespective of ionic size seems to conflict with the expected optimal size matching model and raises questions on what factors determine ion selectivity. A combination of infrared spectroscopy with supporting computational calculations reveals that VM can accommodate larger Rb+ and Cs+ by flexibly changing its cavity size with the elongation of its folded β-turn-like backbone. The high affinity to Rb+ and Cs+ can be ascribed to a size-dependent cavity expansion. These findings provide a new perspective on molecular recognition and selectivity beyond the conventional size matching model.
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Affiliation(s)
- Keisuke Hirata
- Laboratory for Chemistry and Life Science, Institute of Innovative Research, Tokyo Institute of Technology, 4259 Nagatsuta-cho, Midori-ku, Yokohama, 226-8503, Japan. .,Department of Chemistry, School of Science, Tokyo Institute of Technology, 2-12-1 Ookayama, Meguro-ku, Tokyo, 152-8550, Japan
| | - Eiko Sato
- Laboratory for Chemistry and Life Science, Institute of Innovative Research, Tokyo Institute of Technology, 4259 Nagatsuta-cho, Midori-ku, Yokohama, 226-8503, Japan. .,School of Life Science and Technology, Tokyo Institute of Technology, 4259 Nagatsuta-cho, Midori-ku, Yokohama, Kanagawa, 226-8503, Japan
| | - James M Lisy
- International Research Frontiers Initiative (IRFI), Institute of Innovative Research, Tokyo Institute of Technology, 4259, Nagatsuta-cho, Midori-ku, Yokohama, 226-8503, Japan.,Department of Chemistry, University of Illinois at Urbana-Champaign, Urbana, IL, 61801, USA.
| | - Shun-Ichi Ishiuchi
- Laboratory for Chemistry and Life Science, Institute of Innovative Research, Tokyo Institute of Technology, 4259 Nagatsuta-cho, Midori-ku, Yokohama, 226-8503, Japan. .,Department of Chemistry, School of Science, Tokyo Institute of Technology, 2-12-1 Ookayama, Meguro-ku, Tokyo, 152-8550, Japan
| | - Masaaki Fujii
- Laboratory for Chemistry and Life Science, Institute of Innovative Research, Tokyo Institute of Technology, 4259 Nagatsuta-cho, Midori-ku, Yokohama, 226-8503, Japan. .,Department of Chemistry, School of Science, Tokyo Institute of Technology, 2-12-1 Ookayama, Meguro-ku, Tokyo, 152-8550, Japan.,International Research Frontiers Initiative (IRFI), Institute of Innovative Research, Tokyo Institute of Technology, 4259, Nagatsuta-cho, Midori-ku, Yokohama, 226-8503, Japan
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3
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Switching Ion Binding Selectivity of Thiacalix[4]arene Monocrowns at Liquid-Liquid and 2D-Confined Interfaces. Int J Mol Sci 2021; 22:ijms22073535. [PMID: 33805474 PMCID: PMC8038083 DOI: 10.3390/ijms22073535] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/11/2021] [Revised: 03/23/2021] [Accepted: 03/25/2021] [Indexed: 11/23/2022] Open
Abstract
Understanding the interaction of ions with organic receptors in confined space is of fundamental importance and could advance nanoelectronics and sensor design. In this work, metal ion complexation of conformationally varied thiacalix[4]monocrowns bearing lower-rim hydroxy (type I), dodecyloxy (type II), or methoxy (type III) fragments was evaluated. At the liquid–liquid interface, alkylated thiacalixcrowns-5(6) selectively extract alkali metal ions according to the induced-fit concept, whereas crown-4 receptors were ineffective due to distortion of the crown-ether cavity, as predicted by quantum-chemical calculations. In type-I ligands, alkali-metal ion extraction by the solvent-accessible crown-ether cavity was prevented, which resulted in competitive Ag+ extraction by sulfide bridges. Surprisingly, amphiphilic type-I/II conjugates moderately extracted other metal ions, which was attributed to calixarene aggregation in salt aqueous phase and supported by dynamic light scattering measurements. Cation–monolayer interactions at the air–water interface were monitored by surface pressure/potential measurements and UV/visible reflection–absorption spectroscopy. Topology-varied selectivity was evidenced, towards Sr2+ (crown-4), K+ (crown-5), and Ag+ (crown-6) in type-I receptors and Na+ (crown-4), Ca2+ (crown-5), and Cs+ (crown-6) in type-II receptors. Nuclear magnetic resonance and electronic absorption spectroscopy revealed exocyclic coordination in type-I ligands and cation–π interactions in type-II ligands.
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4
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Guo Y, Jiang L, Seitsonen AP, Zhang B, Reichert J, Papageorgiou AC, Barth JV. Interaction of cyclosporin A molecules with alkali and transition metal atoms on Cu(111). Chem Commun (Camb) 2021; 57:2923-2926. [PMID: 33620361 DOI: 10.1039/d1cc00125f] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The structure of a cyclic peptide with important biological functionalities, cyclosporin A (CsA), is investigated at the single molecule level. Its adsorption on Cu(111) under ultra-high vacuum is characterised with scanning tunnelling microscopy (STM) and density functional theory. With STM investigations, we demonstrate element specific on-surface coordination schemes of CsA with coadsorbed K, Co and Fe atoms. Thus, clear insights emerge in the behaviour of cyclic peptides at interfaces and their interactions with different metal atoms, providing control of the adsorption structure and assembly and paving the way for the integration of cyclic peptides in functional metal-organic nanostructures on surfaces.
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Affiliation(s)
- Yuanyuan Guo
- Physics Department E20, Technical University of Munich, Garching D-85748, Germany.
| | - Li Jiang
- Physics Department E20, Technical University of Munich, Garching D-85748, Germany.
| | - Ari Paavo Seitsonen
- Département de Chimie, Ecole Normale Supérieure, Paris F-75005, France and Université de recherche Paris-Sciences-et-Lettres, Sorbonne Université, Centre National de la Recherche Scientifique, Paris F-75005, France
| | - Bodong Zhang
- Physics Department E20, Technical University of Munich, Garching D-85748, Germany.
| | - Joachim Reichert
- Physics Department E20, Technical University of Munich, Garching D-85748, Germany.
| | | | - Johannes V Barth
- Physics Department E20, Technical University of Munich, Garching D-85748, Germany.
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5
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Xu Z, Fang N, Zhao Y. Calix[4]trap: A Bioinspired Host Equipped with Dual Selection Mechanisms. J Am Chem Soc 2021; 143:3162-3168. [PMID: 33606533 DOI: 10.1021/jacs.0c12223] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/20/2023]
Abstract
Regulation of recognition events evolving in time and space is vital for living organisms. During evolution, organisms have developed distinct and orthogonal mechanisms to achieve selective recognition, avoiding mutual interference. Although the merging of multiple selection mechanisms into a single artificial host may lead to a more adaptable recognition system with unparalleled selectivity, successful implementation of this strategy is rare. Inspired by the intriguing structures and recognition properties of two well-known biological ion binders-valinomycin and K+ channels-we herein report a series of hosts equipped with dual guest selection mechanisms. These hosts simultaneously possess a preorganized binding cavity and a confined ion translocation tunnel, which are crucial to the record-setting K+/Na+ selectivity and versatile capabilities to discriminate against a wide range of ion pairs, such as K+/Rb+, K+/Ba2+, and Rb+/Cs+. Mechanistic studies verify that the host's portal is capable of discriminating cations by their size, enabling varied ion uptake rates. The confined tunnel bearing consecutive binding sites promotes complete desolvation of ions during their inclusion into the buried cavity, mimicking the ion translocation within ion channels. Our results demonstrate that the capability to manipulate guest recognition both in equilibrium and out-of-equilibrium states allows the host to effectively discriminate diverse guests via distinct mechanisms. The strategy to merge orthogonal selection mechanisms paves a new avenue to creating more robust hosts that may function in complex biological environments where many recognition events occur concurrently.
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Affiliation(s)
- Zhenchuang Xu
- Key Laboratory of Organofluorine Chemistry, Center for Excellence in Molecular Synthesis, Shanghai Institute of Organic Chemistry, University of Chinese Academy of Sciences, Chinese Academy of Sciences, 345 Ling-Ling Road, Shanghai 200032, China
| | - Nie Fang
- Key Laboratory of Organofluorine Chemistry, Center for Excellence in Molecular Synthesis, Shanghai Institute of Organic Chemistry, University of Chinese Academy of Sciences, Chinese Academy of Sciences, 345 Ling-Ling Road, Shanghai 200032, China
| | - Yanchuan Zhao
- Key Laboratory of Organofluorine Chemistry, Center for Excellence in Molecular Synthesis, Shanghai Institute of Organic Chemistry, University of Chinese Academy of Sciences, Chinese Academy of Sciences, 345 Ling-Ling Road, Shanghai 200032, China.,Key Laboratory of Energy Regulation Materials, Shanghai Institute of Organic Chemistry, Chinese Academy of Sciences, 345 Ling-Ling Road, Shanghai 200032, China
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6
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Baldini L, Casnati A, Sansone F. Multivalent and Multifunctional Calixarenes in Bionanotechnology. European J Org Chem 2020. [DOI: 10.1002/ejoc.202000255] [Citation(s) in RCA: 14] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Affiliation(s)
- Laura Baldini
- Department of Chemistry Life Sciences and Environmental Sustainability University of Parma Parco Area delle Scienze, 17/a 43124 Parma Italy
| | - Alessandro Casnati
- Department of Chemistry Life Sciences and Environmental Sustainability University of Parma Parco Area delle Scienze, 17/a 43124 Parma Italy
| | - Francesco Sansone
- Department of Chemistry Life Sciences and Environmental Sustainability University of Parma Parco Area delle Scienze, 17/a 43124 Parma Italy
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7
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Zainudin AA, Fen YW, Yusof NA, Al-Rekabi SH, Mahdi MA, Omar NAS. Incorporation of surface plasmon resonance with novel valinomycin doped chitosan-graphene oxide thin film for sensing potassium ion. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2018; 191:111-115. [PMID: 29024848 DOI: 10.1016/j.saa.2017.10.013] [Citation(s) in RCA: 23] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/26/2017] [Revised: 09/22/2017] [Accepted: 10/03/2017] [Indexed: 06/07/2023]
Abstract
In this study, the combination of novel valinomycin doped chitosan-graphene oxide (C-GO-V) thin film and surface plasmon resonance (SPR) system for potassium ion (K+) detection has been developed. The novel C-GO-V thin film was deposited on the gold surface using spin coating technique. The system was used to monitor SPR signal for K+ in solution with and without C-GO-V thin film. The K+ can be detected by measuring the SPR signal when C-GO-V thin film is exposed to K+ in solution. The sensor produces a linear response for K+ ion up to 100ppm with sensitivity and detection limit of 0.00948°ppm-1 and 0.001ppm, respectively. These results indicate that the C-GO-V film is high potential as a sensor element for K+ that has been proved by the SPR measurement.
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Affiliation(s)
- Afiq Azri Zainudin
- Department of Physics, Faculty of Science, Universiti Putra Malaysia, 43400 UPM Serdang, Selangor, Malaysia
| | - Yap Wing Fen
- Department of Physics, Faculty of Science, Universiti Putra Malaysia, 43400 UPM Serdang, Selangor, Malaysia; Functional Devices Laboratory, Institute of Advanced Technology, Universiti Putra Malaysia, 43400 UPM Serdang, Selangor, Malaysia.
| | - Nor Azah Yusof
- Functional Devices Laboratory, Institute of Advanced Technology, Universiti Putra Malaysia, 43400 UPM Serdang, Selangor, Malaysia; Department of Chemistry, Faculty of Science, Universiti Putra Malaysia, 43400 UPM Serdang, Selangor, Malaysia
| | - Sura Hmoud Al-Rekabi
- Department of Computer and Communication Systems Engineering, Faculty of Engineering, Universiti Putra Malaysia, 43400 UPM Serdang, Selangor, Malaysia
| | - Mohd Adzir Mahdi
- Department of Computer and Communication Systems Engineering, Faculty of Engineering, Universiti Putra Malaysia, 43400 UPM Serdang, Selangor, Malaysia
| | - Nur Alia Sheh Omar
- Functional Devices Laboratory, Institute of Advanced Technology, Universiti Putra Malaysia, 43400 UPM Serdang, Selangor, Malaysia
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8
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Chu A, Hau FKW, Yam VWW. AuI
⋅⋅⋅AuI
Interaction Assisted Host-Guest Interactions and Stimuli-Responsive Self-Assembly in Tetranuclear Alkynylgold(I) Calix[4]arene-Based Isocyanide Complexes. Chemistry 2017; 23:11076-11084. [DOI: 10.1002/chem.201701631] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/11/2017] [Indexed: 11/10/2022]
Affiliation(s)
- Anlea Chu
- Institute of Molecular Functional Materials (Areas of Excellence Scheme, University Grants Committee (Hong Kong)) and; Department of Chemistry; The University of Hong Kong; Pokfulam Road Hong Kong
| | - Franky Ka-Wah Hau
- Institute of Molecular Functional Materials (Areas of Excellence Scheme, University Grants Committee (Hong Kong)) and; Department of Chemistry; The University of Hong Kong; Pokfulam Road Hong Kong
| | - Vivian Wing-Wah Yam
- Institute of Molecular Functional Materials (Areas of Excellence Scheme, University Grants Committee (Hong Kong)) and; Department of Chemistry; The University of Hong Kong; Pokfulam Road Hong Kong
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9
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Kim SK, Lynch VM, Hay BP, Kim JS, Sessler JL. Ion pair-induced conformational motion in calix[4]arene-strapped calix[4]pyrroles. Chem Sci 2015; 6:1404-1413. [PMID: 29560229 PMCID: PMC5811093 DOI: 10.1039/c4sc03272a] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/24/2014] [Accepted: 12/01/2014] [Indexed: 12/28/2022] Open
Abstract
In order to understand the still-poorly understood interplay between calix[4]arene conformations and cation and anion recognition in multicomponent systems, the ion pair receptors 1 and 2 were synthesized. In solution and in the solid state, the calix[4]arene subunit of receptor 1 adopts a cone conformation, while that of 2 interconverts between the cone and the partial cone conformation. These geometric features differ from previous systems where the calix[4]arene moiety was locked in the 1,3-alternate conformation. A combination of 1H NMR spectroscopic analyses and single crystal X-ray diffraction studies reveal that receptor 1 binds the fluoride and the chloride anion via significantly different binding modes, displaying, for instance, 1 : 1 and 2 : 3 binding stoichiometries with CsF and CsCl, respectively. In the case of 2, the conformation of the calix[4]arene constituent of 2 is highly dependent on the size and quantity of anions present. For example, upon treatment of 2 with the fluoride anion (as both the TBA+ and Cs+ salts), the calix[4]arene unit coexists as cone and partial cone conformers that are inter-convertible. In the presence of excess CsF, the aromatic rings of the calix[4]arene subunit becomes locked in the pinched cone conformation with the result that an ion pair-mediated coordination polymer is formed. In the presence of excess CsCl, the calix[4]arene unit of 2 adopts only the partial cone conformation stabilized by aryl CH-anion hydrogen bonding interactions. The present systems constitute a rare set of related receptors wherein the effects of conformational changes are so tightly coupled with ion recognition.
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Affiliation(s)
- Sung Kuk Kim
- Department of Chemistry , The University of Texas at Austin , 105 E. 24th, Street-Stop A5300 , Austin , Texas 78712-1224 , USA
| | - Vincent M Lynch
- Department of Chemistry , The University of Texas at Austin , 105 E. 24th, Street-Stop A5300 , Austin , Texas 78712-1224 , USA
| | - Benjamin P Hay
- Supramolecular Design Institute , Oak Ridge , TN 37830-7185 , USA
| | - Jong Seung Kim
- Department of Chemistry , Korea University , Seoul 136-701 , Korea
| | - Jonathan L Sessler
- Department of Chemistry , The University of Texas at Austin , 105 E. 24th, Street-Stop A5300 , Austin , Texas 78712-1224 , USA
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10
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Ikeda M, Matsumoto M, Kuwahara S, Habata Y. Tetra-Armed Cyclen Bearing Two Benzo-15-Crown-5 Ethers in the Side Arms. Inorg Chem 2014; 53:10514-9. [DOI: 10.1021/ic501590a] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Mari Ikeda
- Education Center,
Faculty of Engineering, Chiba Institute of Technology, Shibazono
2-1-1, Narashino, Chiba 275-0023, Japan
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11
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Rodríguez-Rodríguez A, Carreira-Barral I, Esteban-Gómez D, Platas-Iglesias C, de Blas A, Rodríguez-Blas T. “Cinderella” elements: Strategies to increase the stability of group 1 complexes by tailoring crown macrocycles. Inorganica Chim Acta 2014. [DOI: 10.1016/j.ica.2013.11.022] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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12
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Schneider HJ, Agrawal P, Yatsimirsky AK. Supramolecular complexations of natural products. Chem Soc Rev 2014; 42:6777-800. [PMID: 23703643 DOI: 10.1039/c3cs60069f] [Citation(s) in RCA: 47] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Abstract
Complexations of natural products with synthetic receptors as well as the use of natural products as host compounds are reviewed, with an emphasis on possible practical uses or on biomedical significance. Applications such as separation, sensing, enzyme monitoring, and protection of natural drugs are first outlined. We then discuss examples of complexes with all important classes of natural compounds, such as amino acids, peptides, nucleosides/nucleotides, carbohydrates, catecholamines, flavonoids, terpenoids/steroids, alkaloids, antibiotics and toxins.
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Affiliation(s)
- Hans-Jörg Schneider
- FR Organische Chemie, Universität des Saarlandes, D 66041 Saarbrücken, Germany.
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13
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Chinta JP, Rao CP. Triazole linked lower rim glycosyl appended 1,3-calix[4]arene conjugates: Synthesis, characterization, and their interaction with jacalin. Carbohydr Res 2013; 369:58-62. [DOI: 10.1016/j.carres.2012.09.010] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/18/2012] [Revised: 09/09/2012] [Accepted: 09/11/2012] [Indexed: 11/29/2022]
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14
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Casnati A. Calixarenes and cations: a time-lapse photography of the big-bang. Chem Commun (Camb) 2013; 49:6827-30. [DOI: 10.1039/c3cc43165g] [Citation(s) in RCA: 27] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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15
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Xia Y, Wang X, Zhang Y, Luo B. Computational investigations into new fluorescence quenching process induced by complexation of alkali metal ion. J PHYS ORG CHEM 2012. [DOI: 10.1002/poc.2917] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
- Yong Xia
- Key Laboratory of Environmentally Friendly Chemistry and Applications of Ministry of Education, College of Chemistry; Xiangtan University; Xiangtan Hunan 411105 P. R. China
| | - Xueye Wang
- Key Laboratory of Environmentally Friendly Chemistry and Applications of Ministry of Education, College of Chemistry; Xiangtan University; Xiangtan Hunan 411105 P. R. China
| | - Yu Zhang
- Key Laboratory of Environmentally Friendly Chemistry and Applications of Ministry of Education, College of Chemistry; Xiangtan University; Xiangtan Hunan 411105 P. R. China
| | - Benhua Luo
- Key Laboratory of Environmentally Friendly Chemistry and Applications of Ministry of Education, College of Chemistry; Xiangtan University; Xiangtan Hunan 411105 P. R. China
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16
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17
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Solid state and solution structures of alkaline-earth complexes with lariat ethers containing aniline and benzimidazole pendants. Polyhedron 2012. [DOI: 10.1016/j.poly.2011.09.027] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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18
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Carreira-Barral I, Rodríguez-Rodríguez A, Regueiro-Figueroa M, Esteban-Gómez D, Platas-Iglesias C, Blas AD, Rodríguez-Blas T. A merged experimental and theoretical conformational study on alkaline-earth complexes with lariat ethers derived from 4,13-diaza-18-crown-6. Inorganica Chim Acta 2011. [DOI: 10.1016/j.ica.2011.01.070] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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19
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He X, Yam VWW. A Highly Selective Bifunctional Luminescence Probe for Potassium and Fluoride Ions. Org Lett 2011; 13:2172-5. [DOI: 10.1021/ol200277n] [Citation(s) in RCA: 77] [Impact Index Per Article: 5.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Xiaoming He
- Institute of Molecular Functional Materials and Department of Chemistry, The University of Hong Kong, Pokfulam Road, Hong Kong, P. R. China
| | - Vivian Wing-Wah Yam
- Institute of Molecular Functional Materials and Department of Chemistry, The University of Hong Kong, Pokfulam Road, Hong Kong, P. R. China
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20
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Marcos PM, Ascenso JR. Synthesis, structural characterisation and metal ion-binding properties of a new p-tert-butyldihomooxacalix[4]crown-6. Supramol Chem 2010. [DOI: 10.1080/10610270802516609] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
Affiliation(s)
- Paula M. Marcos
- a Faculdade de Ciências da Universidade de Lisboa , Centro de Ciências Moleculares e Materiais , Lisboa, Portugal
- b Faculdade de Farmácia da Universidade de Lisboa , Lisboa, Portugal
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21
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Wang Y, Niu L, Li Y, Mao X, Yang Y, Wang C. Single molecule studies of cyclic peptides using molecular matrix at liquid/solid interface by scanning tunneling microscopy. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2010; 26:16305-16311. [PMID: 20593799 DOI: 10.1021/la101467s] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/29/2023]
Abstract
We report in this work the single molecule studies of cyclic peptide, cyclosporine A (CsA), using a molecular network formed by star-shaped oligofluorene (StOF-COOH(3)) at the liquid/solid interface by scanning tunneling microscopy (STM). Individual cyclosporine A can be identified and resolved in the molecular network, and the high-resolution STM images of CsA show polygon-like characteristics with a diameter of approximately 1.7 nm. Furthermore, the complex of CsA and Mg(2+) has also been observed to adsorb inside of the molecular matrix. The STM results reveal two adsorption characteristics for the CsA-Mg(2+) complex, which is suggestive of asymmetrical configurations of the complex. The difference in binding energy between the two observed adsorption configurations is estimated to be 1.88 kJ·mol(-1). These results help set the stage for studying the fine structures and functions of various cyclic peptides at the liquid/solid interface.
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Affiliation(s)
- Yibing Wang
- National Center for Nanoscience and Technology, Beijing 100190, PR China
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22
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Kubo Y, Obara S, Tokita S. Metal Ionically-controlled Optical Signaling Based on a Chromoionophore-derived Calix[4]crown. Supramol Chem 2010. [DOI: 10.1080/10610270212490] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
Affiliation(s)
- Yuji Kubo
- a Department of Applied Chemistry, Faculty of Engineering , Saitama University , Shimo-ohkubo, Saitama, 338-8570, Japan
| | - Satoru Obara
- a Department of Applied Chemistry, Faculty of Engineering , Saitama University , Shimo-ohkubo, Saitama, 338-8570, Japan
| | - Sumio Tokita
- a Department of Applied Chemistry, Faculty of Engineering , Saitama University , Shimo-ohkubo, Saitama, 338-8570, Japan
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23
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Kubo Y, Obara S, Tokita S. Metal Ionically-controlled Optical Signaling Based on a Chromoionophore-derived Calix[4]crown. Supramol Chem 2010. [DOI: 10.1080/10610270290026077] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
Affiliation(s)
- Yuji Kubo
- a Department of Applied Chemistry, Faculty of Engineering , Saitama University , Shimo-ohkubo, Saitama , 338-8570 , Japan
| | - Satoru Obara
- a Department of Applied Chemistry, Faculty of Engineering , Saitama University , Shimo-ohkubo, Saitama , 338-8570 , Japan
| | - Sumio Tokita
- a Department of Applied Chemistry, Faculty of Engineering , Saitama University , Shimo-ohkubo, Saitama , 338-8570 , Japan
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Qi-Yu Z, Chuan-Feng C, Zhi-Tang H. Synthesis and nitration of calix[4] (aza) crowns. CHINESE J CHEM 2010. [DOI: 10.1002/cjoc.20000180118] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
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25
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Yang JL, Yu QZ, An LN, Chen CF, Lin HZ, Bai FL, Huang ZT. Study of the Complexation Behavior of Calixarene with Transition Metal Cations by UV-vis and Fluorescent Spectra. CHINESE J CHEM 2010. [DOI: 10.1002/cjoc.20020200923] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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26
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Yang F, Wang Y, Guo H, Xie J, Liu Z. Novel lariat calix[4]-1,3-aza-crowns with two branched chains — The excellent phase transfer catalysts for nucleophilic substitution reaction. CAN J CHEM 2010. [DOI: 10.1139/v10-061] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
By reacting calix[4]-1,3-diethoxylaminoethyl derivative (2) with phenyl isothiocyanate, novel dendritic calix[4]arene derivative (3) with two different branched chains was synthesized in a yield of 78%. By reacting compound 2 with 1,6-diisocyanatohexane or N,N′-bis(2-chloracetamide)ethylene in a “1 + 1” intermolecular addition mode, novel lariat calix[4]-1,3-aza-crowns (4 and 5, respectively) with two branched ethoxyl chains were prepared in reasonable yields. The composition, structures, and conformations of all new compounds were confirmed by elemental analyses, IR, ESI-MS, 1H NMR, and so forth. The liquid–liquid extraction experiments showed that all new hosts possessed good extraction abilities towards soft and hard metal cations. The liquid membrane transport experiments suggested that they had good transport abilities for K+ and Ag+. The experiments of phase transfer catalysis indicated that they possessed excellent catalytic properties of aromatic nucleophilic substitution reaction and benzyl nucleophilic substitution. The optimum yields of products in catalytic reaction were as high as approximately 100%.
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Affiliation(s)
- Fafu Yang
- College of Chemistry and Materials, Fujian Normal University, Fuzhou 350007, P.R. China
- Fujian Key Laboratory of Polymer Materials, Fuzhou 350007, P.R. China
| | - Yanhua Wang
- College of Chemistry and Materials, Fujian Normal University, Fuzhou 350007, P.R. China
- Fujian Key Laboratory of Polymer Materials, Fuzhou 350007, P.R. China
| | - Hongyu Guo
- College of Chemistry and Materials, Fujian Normal University, Fuzhou 350007, P.R. China
- Fujian Key Laboratory of Polymer Materials, Fuzhou 350007, P.R. China
| | - Jianwei Xie
- College of Chemistry and Materials, Fujian Normal University, Fuzhou 350007, P.R. China
- Fujian Key Laboratory of Polymer Materials, Fuzhou 350007, P.R. China
| | - Zhiqiang Liu
- College of Chemistry and Materials, Fujian Normal University, Fuzhou 350007, P.R. China
- Fujian Key Laboratory of Polymer Materials, Fuzhou 350007, P.R. China
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27
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Kumar A, Sharma P, Kalal BL, Chandel LK. Synthesis and metal extraction behavior of pyridine and 1,2,4-triazole substituted calix[4]arenes. J INCL PHENOM MACRO 2010. [DOI: 10.1007/s10847-010-9796-2] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
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28
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McConnell AJ, Serpell CJ, Thompson AL, Allan DR, Beer PD. Calix[4]arene-based rotaxane host systems for anion recognition. Chemistry 2010; 16:1256-64. [PMID: 19950342 DOI: 10.1002/chem.200902659] [Citation(s) in RCA: 53] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Abstract
The synthesis, structure and anion binding properties of the first calix[4]arene-based [2]rotaxane anion host systems are described. Rotaxanes 9.Cl and 12.Cl, consisting of a calix[4]arene functionalised macrocycle wheel and different pyridinium axle components, are prepared via adaption of an anion templated synthetic strategy to investigate the effect of preorganisation of the interlocked host's binding cavity on anion binding. Rotaxane 12.Cl contains a conformationally flexible pyridinium axle, whereas rotaxane 9.Cl incorporates a more preorganised pyridinium axle component. The X-ray crystal structure of 9.Cl and solution phase (1)H NMR spectroscopy demonstrate the successful interlocking of the calix[4]arene macrocycle and pyridinium axle components in the rotaxane structures. Following removal of the chloride anion template, anion binding studies on the resulting rotaxanes 9.PF(6) and 12.PF(6) reveal the importance of preorganisation of the host binding cavity on anion binding. The more preorganised rotaxane 9.PF(6) is the superior anion host system. The interlocked host cavity is selective for chloride in 1:1 CDCl(3)/CD(3)OD and remains selective for chloride and bromide in 10 % aqueous media over the more basic oxoanions. Rotaxane 12.PF(6) with a relatively conformationally flexible binding cavity is a less effective and discriminating anion host system although the rotaxane still binds halide anions in preference to oxoanions.
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Affiliation(s)
- Anna J McConnell
- Inorganic Chemistry Laboratory, Department of Chemistry, University of Oxford, South Parks Road, Oxford, OX1 3QR, UK
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29
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Saggiomo V, Goeschen C, Herges R, Quesada R, Lüning U. Ion Transport Across Membranes Facilitated by a Dynamic Combinatorial Library. European J Org Chem 2010. [DOI: 10.1002/ejoc.201000038] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
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30
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de Silva AP, Uchiyama S. Molecular Logic Gates and Luminescent Sensors Based on Photoinduced Electron Transfer. LUMINESCENCE APPLIED IN SENSOR SCIENCE 2010; 300:1-28. [DOI: 10.1007/128_2010_96] [Citation(s) in RCA: 30] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
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31
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OHTO K. Review of the Extraction Behavior of Metal Cations with Calixarene Derivatives. SOLVENT EXTRACTION RESEARCH AND DEVELOPMENT-JAPAN 2010. [DOI: 10.15261/serdj.17.1] [Citation(s) in RCA: 46] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
Affiliation(s)
- Keisuke OHTO
- Department of Chemistry and Applied Chemistry, Faculty of Science and Engineering, Saga University
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32
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Lu Y, Li Y, He S, Lu Y, Liu C, Zeng X, Chen L. Synthesis and properties of calix[4]arene telluropodant ethers as Ag+ selective sensors and Ag+, Hg2+ extractants. Beilstein J Org Chem 2009; 5:59. [PMID: 20383258 PMCID: PMC2839533 DOI: 10.3762/bjoc.5.59] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/04/2009] [Accepted: 09/09/2009] [Indexed: 12/04/2022] Open
Abstract
Three novel phenyltelluroalkoxyl functionalized tweezer-like calix[4]arenes 6-8 and two monophenyltelluropropoxyl functionalized calix[4]arenes 10 (cone conformer) and 12 (partial cone conformer) were synthesized and characterized. They are good Ag(+)-selective ionophores in ion-selective electrodes evaluated by electromotive force measurements of polymer membrane electrodes. The tweezer-like ionophores 6-8 showed excellent extraction ability towards Ag(+) and Hg(2+).
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Affiliation(s)
- Yang Lu
- Key Laboratory of Display Materials and Photoelectric Devices (Tianjin University of Technology), Ministry of Education, Tianjin 300384, P.R. China
| | - Yuanyuan Li
- Key Laboratory of Display Materials and Photoelectric Devices (Tianjin University of Technology), Ministry of Education, Tianjin 300384, P.R. China
| | - Song He
- Key Laboratory of Display Materials and Photoelectric Devices (Tianjin University of Technology), Ministry of Education, Tianjin 300384, P.R. China
| | - Yan Lu
- Key Laboratory of Display Materials and Photoelectric Devices (Tianjin University of Technology), Ministry of Education, Tianjin 300384, P.R. China
| | - Changying Liu
- State Key Laboratory of Elemento-Organic Chemistry, Nankai University, Tianjin 300071, P.R. China
| | - Xianshun Zeng
- Key Laboratory of Display Materials and Photoelectric Devices (Tianjin University of Technology), Ministry of Education, Tianjin 300384, P.R. China
- State Key Laboratory of Elemento-Organic Chemistry, Nankai University, Tianjin 300071, P.R. China
| | - Langxing Chen
- State Key Laboratory of Elemento-Organic Chemistry, Nankai University, Tianjin 300071, P.R. China
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33
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Grubert L, Hennig H, Grummt UW, Abraham W. Photoswitchable ionophores based on 1,3-alternate calix[4]arenes bearing acridane units at the wide rim and bridged at the narrow rim by glycol chains. Tetrahedron 2009. [DOI: 10.1016/j.tet.2009.07.096] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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34
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Ding CW, Zhang MJ, Ma N. Clean synthesis of calix[4]crown-5-sulfonyl cyclothiourea derivatives at room temperature in aqueous solution. CHINESE CHEM LETT 2009. [DOI: 10.1016/j.cclet.2009.04.031] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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35
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Bou Maroun E, Hagège A, Basset C, Quéméneur E, Vidaud C, Asfari Z. Synthesis of phosphorylated calix[4]arene derivatives for the design of solid phases immobilising uranyl cations. Supramol Chem 2009. [DOI: 10.1080/10610270802588301] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
Affiliation(s)
- Elias Bou Maroun
- a Laboratoire de Chimie Analytique et Minérale , UMR 7178 ULP/CNRS/IN2P3 (LC4), ECPM , Strasbourg Cedex, France
| | - Agnès Hagège
- a Laboratoire de Chimie Analytique et Minérale , UMR 7178 ULP/CNRS/IN2P3 (LC4), ECPM , Strasbourg Cedex, France
| | - Christian Basset
- b CEA IBEB, SBTN, Marcoule Research Center , Bagnols-sur-Cèze, France
| | - Eric Quéméneur
- b CEA IBEB, SBTN, Marcoule Research Center , Bagnols-sur-Cèze, France
| | - Claude Vidaud
- b CEA IBEB, SBTN, Marcoule Research Center , Bagnols-sur-Cèze, France
| | - Zouhair Asfari
- a Laboratoire de Chimie Analytique et Minérale , UMR 7178 ULP/CNRS/IN2P3 (LC4), ECPM , Strasbourg Cedex, France
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36
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Mono-ionizable calix[4]arene-benzocrown-6 ligands in 1,3-alternate conformations: synthesis, structure and silver(I) extraction. Tetrahedron 2009. [DOI: 10.1016/j.tet.2009.07.006] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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37
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Grubert L, Hennig H, Abraham W. Photo, proton and metal ion responsive wide-rim acridane substituted calix[4]arenes. Tetrahedron 2009. [DOI: 10.1016/j.tet.2009.05.082] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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38
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Makarasen A, Yoza K, Isobe M. Higher structure of cereulide, an emetic toxin from Bacillus cereus, and special comparison with valinomycin, an antibiotic from Streptomyces fulvissimus. Chem Asian J 2009; 4:688-98. [PMID: 19347893 DOI: 10.1002/asia.200900011] [Citation(s) in RCA: 26] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Abstract
Cereulide and valinomycin are both 36-membered cyclic depsipeptides with 12 stereogenic centers that have a very similar sequence of cyclo [-D-O-Leu-D-Ala-L-O-Val-L-Val-]3 and cyclo [-D-O-Val-D-Val-L-O-Ala-L-Val-]3, respectively. Cereulide is an emetic toxin produced by Bacillus cereus through an unusual non-ribosomal peptide synthesis (NRPS), whereas valinomycin, produced by Streptomyces fulvissimus, is a known antibiotic drug. Both compounds are known as K+-ion-selective ionophores and cause a potassium-dependent drop in the transmembrane potential of mitochondria, arising from the uptake of a K+-ion-charged ionophore complex. Such compounds may affect mitochondrial function. In the three-dimensional structure of cereulide and valinomycin, cereulide has a vertical and horizontal mirror-image-like structure as is the case in valinomycin. The only difference is the side chains which are linked to a similar framework. Through the current 1H NMR spectroscopy and metal-complexation studies, we found that cereulide had a higher complexation ability to metal ions compared to valinomycin. Cereulide exhibited the K+-ion-selective ionophore property at a lower concentration than valinomycin. X-ray crystallographic analyses of the cereulide and valinomycin H+ form were compared, and revealed that the higher structures of both compounds also showed similarity in the crystal structures. The structure of cereulide-H+ form was found to be in agreement with the structure obtained by a combination of NMR spectroscopy and molecular-mechanics calculations, which afforded reasonable dihedral angles at the local-minimum-energy conformation of the cereulide-K+-ion complex.
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Affiliation(s)
- Arthit Makarasen
- Laboratory of Organic Chemistry, Graduate School of Bioagricultural Sciences, Nagoya University, Chikusa, Nagoya, 466-8601, Japan
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39
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Abstract
Supramolecular chemistry has expanded dramatically in recent years both in terms of potential applications and in its relevance to analogous biological systems. The formation and function of supramolecular complexes occur through a multiplicity of often difficult to differentiate noncovalent forces. The aim of this Review is to describe the crucial interaction mechanisms in context, and thus classify the entire subject. In most cases, organic host-guest complexes have been selected as examples, but biologically relevant problems are also considered. An understanding and quantification of intermolecular interactions is of importance both for the rational planning of new supramolecular systems, including intelligent materials, as well as for developing new biologically active agents.
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Affiliation(s)
- Hans-Jörg Schneider
- Organische Chemie, Universität des Saarlandes, 66041 Saarbrücken, Deutschland.
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40
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41
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Kim TH, Kim JS, Kim H. Voltammetric studies for cation recognition with thiacalix[4]crown-6s. J Electroanal Chem (Lausanne) 2008. [DOI: 10.1016/j.jelechem.2007.11.034] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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42
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43
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Dixit SS, Shashidhar MS. Inositol derived crown ethers: effect of auxiliary protecting groups and the relative orientation of crown ether oxygen atoms on their metal ion binding ability. Tetrahedron 2008. [DOI: 10.1016/j.tet.2007.12.034] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
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44
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45
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Bitter I, Grün A, Balázs B, Tóth G, Horváth G, Töke L. Studies on Calix(aza)crqwns, III. Synthesis of 1,3-Alternate Calix[4]arenes Capped by Diamide Bridges. SYNTHETIC COMMUN 2007. [DOI: 10.1080/00397919908085912] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
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46
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Efficient divalent metal cation extractions with di-ionizable calix[4]arene-1,2-crown-4 compounds. Tetrahedron 2007. [DOI: 10.1016/j.tet.2007.02.105] [Citation(s) in RCA: 32] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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47
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van Leeuwen FWB, Beijleveld H, Miermans CJH, Huskens J, Verboom W, Reinhoudt DN. Ionizable (Thia)calix[4]crowns as highly selective 226Ra2+ ionophores. Anal Chem 2007; 77:4611-7. [PMID: 16013880 DOI: 10.1021/ac050524n] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
The 226Ra2+ selectivity of the ionizable (thia)calix[4]crowns 1-4 was determined in the presence of a large excess of the most common alkali and alkaline earth cations. Selective 226Ra2+ (2.9 x 10(-)(8) M) extraction occurs even at extremely high M(n+)/226Ra2+ ratios of 3.5 x 10(7) [M(n+) = Na+, K+, Rb+, Cs+, Mg2+, Ca2+, and Sr2+ (1M)] and an ionophore concentration of 10(-4) M. The selectivity coefficients log(K(Ra)(ex)/K(M)(ex)) are approximately 3.5 for Mg2+, Ca2+, and Sr2+. In the presence of Ba2+, which has very similar chemical properties, only the thiacalix[4]crown-6 derivative 4 showed a selectivity for 226Ra2+. In addition to the remarkable 226Ra2+ selectivities, the effective pH range (pH 8-13) of the thiacalix[4]crown dicarboxylic acids (3 and 4) allows for full regeneration of the ionophores at lower pH values (pH <6).
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Affiliation(s)
- Fijs W B van Leeuwen
- Laboratory of Supramolecular Chemistry and Technology, MESA Institute for Nanotechnology, University of Twente, P.O. Box 217, 7500 AE Enschede, The Netherlands
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48
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Synthesis and characterization of a novel series of pyrimidinylthiaalkoxycalix[4]arenes. CHINESE CHEM LETT 2007. [DOI: 10.1016/j.cclet.2007.02.007] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
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49
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Duta M, Asfari Z, Hagege A, Thuery P, Leroy M. Synthesis and Complexation Studies of Various Precursors Based on Calix[4]arene-crown-5 and -6 for the Immunoanalysis of Potassium and Caesium Ions. Supramol Chem 2007. [DOI: 10.1080/10610270310001647001] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
Affiliation(s)
- Mariana Duta
- a Laboratoire de Chimie Analytique et Minérale , UMRULP/CNRS, ECPM , 25 rue Becquerel, 67087, Strasbourg Cedex, France
| | - Zouhair Asfari
- a Laboratoire de Chimie Analytique et Minérale , UMRULP/CNRS, ECPM , 25 rue Becquerel, 67087, Strasbourg Cedex, France
| | - Agnes Hagege
- a Laboratoire de Chimie Analytique et Minérale , UMRULP/CNRS, ECPM , 25 rue Becquerel, 67087, Strasbourg Cedex, France
| | - Pierre Thuery
- b CEA/Saclay, DSM/DRECAM/SCM (CNRS URA 331) , Bât. 125, 91191, Gif-sur-Yvette, France
| | - Maurice Leroy
- a Laboratoire de Chimie Analytique et Minérale , UMRULP/CNRS, ECPM , 25 rue Becquerel, 67087, Strasbourg Cedex, France
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50
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Zhou H, Liu D, Gega J, Surowiec K, Purkiss DW, Bartsch RA. Effect of para-substituents on alkaline earth metal ion extraction by proton di-ionizable calix[4]arene-crown-6 ligands in cone, partial-cone and 1,3-alternate conformations. Org Biomol Chem 2007; 5:324-32. [PMID: 17205177 DOI: 10.1039/b611570e] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Two carboxylic acid or N-(X)sulfonyl carboxamide groups were incorporated into calix[4]arene-crown-6 compounds to afford di-ionizable ligands for use in divalent metal ion separations. Acidities of the N-(X)sulfonyl carboxamide groups were tuned by variation of the electron-withdrawing properties of X. Cone, partial-cone and 1,3-alternate conformations were obtained by different synthetic strategies and their structures verified by NMR spectroscopy. Competitive solvent extractions of alkaline earth metal cations from aqueous solutions into chloroform were performed and the results compared with those reported previously for di-ionizable p-tert-butylcalix[4]arene-crown-6 analogues to probe the influence of the para-substituent on the calix[4]arene scaffold on extraction selectivity and efficiency.
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Affiliation(s)
- Hui Zhou
- Department of Chemistry and Biochemistry, Texas Tech University, Lubbock, Texas 79409-1061, USA
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