1
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Abuhafez N, Gramage-Doria R. Boosting the activity of Mizoroki-Heck cross-coupling reactions with a supramolecular palladium catalyst favouring remote Zn⋯pyridine interactions. Faraday Discuss 2023; 244:186-198. [PMID: 37083293 DOI: 10.1039/d2fd00165a] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/10/2023]
Abstract
Transition metal catalysis benefitting from supramolecular interactions in the secondary coordination sphere in order to pre-organize substrates around the active site and reach a specific selectivity typically occurs under long reaction times and mild reaction temperatures with the aim to maximize such subtle effects. Herein, we demonstrate that the kinetically labile Zn⋯N interaction between a pyridine substrate and a zinc-porphyrin site serving for substrate binding is a unique type of weak interaction that enables identification of supramolecular effects in transition metal catalysis after one hour at a high reaction temperature of 130 °C. Under carefully selected reaction conditions, supramolecularly-regulated palladium-catalyzed Mizoroki-Heck reactions between 3-bromopyridine and terminal olefins (acrylates or styrenes) proceeded in a more efficient manner compared to the non-supramolecular version. The supramolecular catalysis developed here also displayed interesting substrate-selectivity patterns.
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Affiliation(s)
- Naba Abuhafez
- Univ Rennes, CNRS, ISCR-UMR6226, F-35000 Rennes, France.
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2
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Strianese M, D'Auria GJ, Lamberti M, Landi A, Peluso A, Varriale A, D'Auria S, Pellecchia C. Salen, salan and salalen zinc(II) complexes in the interaction with HS -: time-resolved fluorescence applications. Dalton Trans 2023; 52:1357-1365. [PMID: 36632781 DOI: 10.1039/d2dt03730k] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/05/2023]
Abstract
In the current work we investigate the route of interaction of a newly synthesized family of zinc complexes with HS- by a plethora of different spectroscopic techniques. A computational analysis on the time dependent density functional theory (TD-DFT) level explored the overall fluorescence properties of the title complexes and their different fluorescence responses to HS-. Time-resolved fluorescence experiments were also performed and highlight the great potential of the current systems to be implemented as HS- fluorescent sensors.
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Affiliation(s)
- Maria Strianese
- Dipartimento di Chimica e Biologia "Adolfo Zambelli", Università degli Studi di Salerno, Via Giovanni Paolo II, 132, 84084, Fisciano (SA), Italy.
| | - Gerard Joseph D'Auria
- Dipartimento di Chimica e Biologia "Adolfo Zambelli", Università degli Studi di Salerno, Via Giovanni Paolo II, 132, 84084, Fisciano (SA), Italy.
| | - Marina Lamberti
- Dipartimento di Chimica e Biologia "Adolfo Zambelli", Università degli Studi di Salerno, Via Giovanni Paolo II, 132, 84084, Fisciano (SA), Italy.
| | - Alessandro Landi
- Dipartimento di Chimica e Biologia "Adolfo Zambelli", Università degli Studi di Salerno, Via Giovanni Paolo II, 132, 84084, Fisciano (SA), Italy.
| | - Andrea Peluso
- Dipartimento di Chimica e Biologia "Adolfo Zambelli", Università degli Studi di Salerno, Via Giovanni Paolo II, 132, 84084, Fisciano (SA), Italy.
| | - Antonio Varriale
- Institute of Food Science, CNR Italy, 83100 Avellino, Italy.,URT-ISA, CNR at Department of Biology, University of Naples Federico II, 80126 Napoli, Italy
| | - Sabato D'Auria
- Department of Biology, Agriculture, and Food Sciences, National Research Council of Italy (CNR-DISBA), Piazzale Aldo Moro 7, 00185 Rome, Italy
| | - Claudio Pellecchia
- Dipartimento di Chimica e Biologia "Adolfo Zambelli", Università degli Studi di Salerno, Via Giovanni Paolo II, 132, 84084, Fisciano (SA), Italy.
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3
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Lewis Acidic Zinc(II) Complexes of Tetradentate Ligands as Building Blocks for Responsive Assembled Supramolecular Structures. CHEMISTRY 2023. [DOI: 10.3390/chemistry5010010] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/15/2023] Open
Abstract
This review presents representative examples illustrating how the Lewis acidic character of the Zn(II) metal center in Zn(salen)-type complexes, as well as in complexes of other tetradentate ligands, and the nature of the medium govern their supramolecular aggregation, leading to the formation of a variety of supramolecular structures, either in solution or in the solid state. Stabilization of these Lewis acidic complexes is almost always reached through an axial coordination of a Lewis base, leading to a penta-coordinated square-pyramidal geometry around the metal center. The coverage is not exhaustive, mainly focused on their crystallographic structures, but also on their aggregation and sensing properties in solution, and on their self-assembled and responsive nanostructures, summarizing their salient aspects. The axial ligands can easily be displaced, either in solution or in the solid state, with suitable Lewis bases, thus being responsive supramolecular structures useful for sensing. This contribution represents the first attempt to relate some common features of the chemistry of different families of Zn(II) complexes of tetradentate ligands to their intrinsic Lewis acidic character.
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4
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Trouvé J, Zardi P, Al-Shehimy S, Roisnel T, Gramage-Doria R. Enzyme-like Supramolecular Iridium Catalysis Enabling C-H Bond Borylation of Pyridines with meta-Selectivity. Angew Chem Int Ed Engl 2021; 60:18006-18013. [PMID: 33704892 DOI: 10.1002/anie.202101997] [Citation(s) in RCA: 40] [Impact Index Per Article: 13.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/08/2021] [Indexed: 01/14/2023]
Abstract
The use of secondary interactions between substrates and catalysts is a promising strategy to discover selective transition metal catalysts for atom-economy C-H bond functionalization. The most powerful catalysts are found via trial-and-error screening due to the low association constants between the substrate and the catalyst in which small stereo-electronic modifications within them can lead to very different reactivities. To circumvent these limitations and to increase the level of reactivity prediction in these important reactions, we report herein a supramolecular catalyst harnessing Zn⋅⋅⋅N interactions that binds to pyridine-like substrates as tight as it can be found in some enzymes. The distance and spatial geometry between the active site and the substrate binding site is ideal to target unprecedented meta-selective iridium-catalyzed C-H bond borylations with enzymatic Michaelis-Menten kinetics, besides unique substrate selectivity and dormant reactivity patterns.
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Affiliation(s)
| | - Paolo Zardi
- Univ Rennes, CNRS, ISCR-UMR6226, 35000, Rennes, France
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5
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Tsai M, Su Y, Wu J. Anion Effect on the Formation of Zinc‐Salicyaldimine Compounds in Neutral and Anionic Complex Forms: Synthesis, Characterization,
1
H NMR Studies, and Photophysical Properties. Eur J Inorg Chem 2021. [DOI: 10.1002/ejic.202100377] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Affiliation(s)
- Meng‐Jung Tsai
- Department of Applied Chemistry National Chi Nan University Nantou 545 Taiwan
| | - Yo‐Ting Su
- Department of Applied Chemistry National Chi Nan University Nantou 545 Taiwan
| | - Jing‐Yun Wu
- Department of Applied Chemistry National Chi Nan University Nantou 545 Taiwan
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6
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Di Bella S. Lewis acidic zinc(II) salen-type Schiff-base complexes: sensing properties and responsive nanostructures. Dalton Trans 2021; 50:6050-6063. [PMID: 33876173 DOI: 10.1039/d1dt00949d] [Citation(s) in RCA: 19] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/05/2023]
Abstract
In this frontier article some peculiar characteristics of Zn(salen)-type Schiff-base complexes are reviewed. The paper is mainly focused on the most recent and relevant achievements on responsive supramolecular nanostructures and sensing properties, both of them related to the Lewis acidic character of the ZnII centre in these molecular species, providing an interpretation of these features. The sensing properties of Zn(salen)-type complexes mainly originate from optical spectroscopic changes associated with the formation of the adducts upon addition of a Lewis base (analyte), either by deaggregation of dimeric species or displacement of the solvent coordinated to the metal centre. In both cases the direct sensing is related either to the Lewis acidic character of the complex as well as to the Lewis basicity of the analyte. The formation of responsive nanostructures with fluorescent, and/or vapochromic, mechanochromic, and thermochromic characteristics is driven by non-mutual intermolecular ZnO interactions, further stabilized by π-π stacking interactions and/or interdigitation of the alkyl side groups. The Lewis acidic character is not a prerogative of Zn(salen)-type complexes of tetradentate Schiff-bases. Many other classes of ZnII complexes can possess this property. A correct interpretation of their chemistry is certainly useful for further development of these classical coordination compounds as new molecular materials.
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Affiliation(s)
- Santo Di Bella
- Dipartimento di Scienze Chimiche, Università di Catania, I-95125 Catania, Italy.
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7
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Trouvé J, Zardi P, Al‐Shehimy S, Roisnel T, Gramage‐Doria R. Enzyme‐like Supramolecular Iridium Catalysis Enabling C−H Bond Borylation of Pyridines with
meta
‐Selectivity. Angew Chem Int Ed Engl 2021. [DOI: 10.1002/ange.202101997] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Affiliation(s)
| | - Paolo Zardi
- Univ Rennes CNRS, ISCR-UMR6226 35000 Rennes France
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8
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Fish H, Hart S, Lamb KJ, North M, Quek SCZ, Whitwood AC, Woods B, Wu X. Structural analysis of five-coordinate aluminium(salen) complexes and its relationship to their catalytic activity. Dalton Trans 2021; 50:587-598. [PMID: 33367409 DOI: 10.1039/d0dt03598j] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The crystal structure of [Al(tBu-salen)]2O·HCl shows major changes compared to that of [Al(tBu-salen)]2O. The additional proton is localized on the bridging oxygen atom, making the aluminium atoms more electron deficient. As a result, a water molecule coordinates to one of the aluminium atoms, which becomes six-coordinate. This pushes the salen ligand associated with the six-coordinate aluminium ion closer to the other salen ligand and results in the geometry around the five-coordinate aluminium atom becoming more trigonal bipyramidal. These results experimentally mirror the predications of DFT calculations on the interaction of [Al(tBu-salen)]2O and related complexes with carbon dioxide. Variable temperature NMR studies of protonated [Al(tBu-salen)]2O complexes revealed that the structures were dynamic and could be explained on the basis of an intramolecular rearrangement in which the non-salen substituent of a five-coordinate aluminium(tBu-salen) unit migrates from one face of a square based pyramidal structure to the other via the formation of structures with trigonal bipyramidal geometries. Protonated [Al(tBu-salen)]2O complexes were shown to have enhanced Lewis acidity relative to [Al(tBu-salen)]2O, coordinating to water, dioxane and 1,2-epoxyhexane. Coordinated epoxyhexane was activated towards ring-opening, to give various species which remained coordinated to the aluminium centers. The protonated [Al(tBu-salen)]2O complexes catalysed the synthesis of cyclic carbonates from epoxides and carbon dioxide both in the presence and absence of tetrabutylammonium bromide as a nucleophilic cocatalyst. The catalytic activity was principally determined by the nature of the nucleophilic species within the catalyst structure rather than by changes to the Lewis acidity of the metal centers.
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Affiliation(s)
- Heather Fish
- Department of Chemistry, University of York, Heslington, York YO10 5DD, UK.
| | - Sam Hart
- Department of Chemistry, University of York, Heslington, York YO10 5DD, UK.
| | - Katie J Lamb
- Department of Chemistry, University of York, Heslington, York YO10 5DD, UK.
| | - Michael North
- Department of Chemistry, University of York, Heslington, York YO10 5DD, UK.
| | - Sophie C Z Quek
- Department of Chemistry, University of York, Heslington, York YO10 5DD, UK.
| | - Adrian C Whitwood
- Department of Chemistry, University of York, Heslington, York YO10 5DD, UK.
| | - Barnaby Woods
- Department of Chemistry, University of York, Heslington, York YO10 5DD, UK.
| | - Xiao Wu
- Department of Chemistry, University of York, Heslington, York YO10 5DD, UK.
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9
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Diana R, Panunzi B. The Role of Zinc(II) Ion in Fluorescence Tuning of Tridentate Pincers: A Review. Molecules 2020; 25:molecules25214984. [PMID: 33126503 PMCID: PMC7662684 DOI: 10.3390/molecules25214984] [Citation(s) in RCA: 39] [Impact Index Per Article: 9.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/06/2020] [Revised: 10/20/2020] [Accepted: 10/25/2020] [Indexed: 12/17/2022] Open
Abstract
Tridentate ligands are simple low-cost pincers, easy to synthetize, and able to guarantee stability to the derived complexes. On the other hand, due to its unique mix of structural and optical properties, zinc(II) ion is an excellent candidate to modulate the emission pattern as desired. The present work is an overview of selected articles about zinc(II) complexes showing a tuned fluorescence response with respect to their tridentate ligands. A classification of the tridentate pincers was carried out according to the binding donor atom groups, specifically nitrogen, oxygen, and sulfur donor atoms, and depending on the structure obtained upon coordination. Fluorescence properties of the ligands and the related complexes were compared and discussed both in solution and in the solid state, keeping an eye on possible applications.
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10
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Janeta M, Lis T, Szafert S. Zinc Imine Polyhedral Oligomeric Silsesquioxane as a Quattro-Site Catalyst for the Synthesis of Cyclic Carbonates from Epoxides and Low-Pressure CO 2. Chemistry 2020; 26:13686-13697. [PMID: 33463802 DOI: 10.1002/chem.202002996] [Citation(s) in RCA: 16] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/22/2020] [Revised: 07/22/2020] [Indexed: 01/13/2023]
Abstract
In the present research, the synthesis, spectroscopic characterization, and structural investigations of a unique ZnII complex of imine-functionalized polyhedral oligomeric silsesquioxane (POSS) is designed, and hereby described, as a catalyst for the synthesis of cyclic carbonates from epoxides and CO2. The uncommon features of the designed catalytic system is the elimination of the need for a high pressure of CO2 and the significant shortening of reaction times commonly associated with such difficult transformations like that of styrene oxide to styrene carbonate. Our studies have shown that imine-POSS is able to chelate metal ions like ZnII to form a unique coordination complex. The silsesquioxane core and the hindrance of the side arms (their steric effect) influence the construction process of the homoleptic Zn4@POSS-1 complex. The compound was characterized in solution by NMR (1H, 13C, 29Si), ESI-MS, UV/Vis spectroscopy and in the solid state by thermogravimetric/differential thermal analysis (TG-DTA), elemental analysis, diffuse reflectance infrared Fourier transform spectroscopy (DRIFTS), cross-polarization magic angle spinning (CP MAS) NMR (13C, 29Si) spectroscopy, and X-ray crystallography.
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Affiliation(s)
- Mateusz Janeta
- Faculty of Chemistry, University of Wrocław, F. Joliot-Curie 14, 50-383, Wrocław, Poland
| | - Tadeusz Lis
- Faculty of Chemistry, University of Wrocław, F. Joliot-Curie 14, 50-383, Wrocław, Poland
| | - Sławomir Szafert
- Faculty of Chemistry, University of Wrocław, F. Joliot-Curie 14, 50-383, Wrocław, Poland
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11
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Hylland KT, Øien‐Ødegaard S, Heyn RH, Tilset M. Zinc Schiff Base Complexes Derived from 2,2'‐Diaminobiphenyls: Solution Behavior and Reactivity towards Nitrogen Bases. Eur J Inorg Chem 2020. [DOI: 10.1002/ejic.202000589] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/04/2023]
Affiliation(s)
| | - Sigurd Øien‐Ødegaard
- Department of Chemistry University of Oslo P. O. Box 1033 Blindern 0315 Oslo Norway
| | | | - Mats Tilset
- Department of Chemistry University of Oslo P. O. Box 1033 Blindern 0315 Oslo Norway
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12
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Easy coordinate geometry indexes, τ4 and τ5 and HSA study for unsymmetrical Pd(II), Fe(II), Zn(II), Mn(II), Cu(II) and VO(IV) complexes of a tetradentate ligand: Synthesis, characterization, properties, and antioxidant activities. Inorganica Chim Acta 2020. [DOI: 10.1016/j.ica.2020.119434] [Citation(s) in RCA: 13] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/07/2023]
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13
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Cho K, Lee SM, Kim HJ, Ko Y, Kang EJ, Son SU. Iron Coordination to Hollow Microporous Metal‐Free Disalphen Networks: Heterogeneous Iron Catalysts for CO
2
Fixation to Cyclic Carbonates. Chemistry 2019; 26:788-794. [DOI: 10.1002/chem.201904344] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/21/2019] [Revised: 10/19/2019] [Indexed: 11/10/2022]
Affiliation(s)
- Kyoungil Cho
- Department of chemistry Sungkyunkwan University Suwon 16419 Korea
| | | | - Hae Jin Kim
- Korea Basic Science Institute Daejeon 34133 Korea
| | - Yoon‐Joo Ko
- Laboratory of Nuclear Magnetic Resonance National Center for Inter-University Research Facilities (NCIRF) Seoul National University Seoul 08826 Korea
| | - Eun Joo Kang
- Department of Applied Chemistry Kyung Hee University Yongin 17104 Korea
| | - Seung Uk Son
- Department of chemistry Sungkyunkwan University Suwon 16419 Korea
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14
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Jebastin Andrews S, Benita Jeba Silviya S, Bhuvanesh NS, Janet Sylvia Jaba Rose J, Winfred Jebaraj J, Balakrishnan C. Crystal structure and evaluating C H⋯π (aryl/chelate) interactions in bis(2-{[(2-hydroxyethyl)imino]-methyl}-4,6-diiodophenolato)-palladium(II) Schiff base complex derived from (E)-2-(((2-hydroxyethyl)imino)methyl)-4,6-diiodophenol. Inorganica Chim Acta 2019. [DOI: 10.1016/j.ica.2019.119118] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
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15
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Consiglio G, Oliveri IP, Failla S, Di Bella S. On the Aggregation and Sensing Properties of Zinc(II) Schiff-Base Complexes of Salen-Type Ligands. Molecules 2019; 24:E2514. [PMID: 31324053 PMCID: PMC6651702 DOI: 10.3390/molecules24132514] [Citation(s) in RCA: 22] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/27/2019] [Revised: 07/08/2019] [Accepted: 07/09/2019] [Indexed: 12/18/2022] Open
Abstract
The zinc(II) ion forms stable complexes with a wide variety of ligands, but those related to Schiff-bases are among the most largely investigated. This review deals with the peculiar aggregation characteristics of Zn(II) Schiff-base complexes from tetradentate N2O2 salen-type ligands, L, derivatives from salicylaldehydes and 1,2-diamines, and is mostly focused on their spectroscopic properties in solution. Thanks to their Lewis acidic character, ZnL complexes show interesting structural, nanostructural, and aggregation/deaggregation properties in relation to the absence/presence of a Lewis base. Deaggregation of these complexes is accompanied by relevant changes of their spectroscopic properties that can appropriately be exploited for sensing Lewis bases. Thus, ZnL complexes have been investigated as chromogenic and fluorogenic chemosensors of charged and neutral Lewis bases, including cell imaging, and have shown to be selective and sensitive to the Lewis basicity of the involved species. From these studies emerges that these popular, Lewis acidic bis(salicylaldiminato)Zn(II) Schiff-base complexes represent classical coordination compounds for modern applications.
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Affiliation(s)
- Giuseppe Consiglio
- Dipartimento di Scienze Chimiche, Università di Catania, I-95125 Catania, Italy
| | - Ivan Pietro Oliveri
- Dipartimento di Scienze Chimiche, Università di Catania, I-95125 Catania, Italy
| | - Salvatore Failla
- Dipartimento di Scienze Chimiche, Università di Catania, I-95125 Catania, Italy.
| | - Santo Di Bella
- Dipartimento di Scienze Chimiche, Università di Catania, I-95125 Catania, Italy.
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16
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Herasymchuk K, Miller JJ, MacNeil GA, Sergeenko AS, McKearney D, Goeb S, Sallé M, Leznoff DB, Storr T. Coordination-driven assembly of a supramolecular square and oxidation to a tetra-ligand radical species. Chem Commun (Camb) 2019; 55:6082-6085. [PMID: 31066383 DOI: 10.1039/c9cc02320h] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The design and synthesis of a supramolecular square was achieved by coordination-driven assembly of redox-active nickel(ii) salen linkers and (ethylenediamine)palladium(ii) nodes. The tetrameric geometry of the supramolecular structure was confirmed via MS, NMR, and electrochemical experiments. While oxidation of the monomeric metalloligand Schiff-base affords a Ni(iii) species, oxidation of the coordination-driven assembly results in ligand radical formation.
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Affiliation(s)
| | - Jessica J Miller
- Department of Chemistry, Simon Fraser University, Burnaby, Canada.
| | | | - Ania S Sergeenko
- Department of Chemistry, Simon Fraser University, Burnaby, Canada.
| | - Declan McKearney
- Department of Chemistry, Simon Fraser University, Burnaby, Canada.
| | - Sébastien Goeb
- Laboratoire MOLTECH-Anjou, UMR CNRS 6200, UNIV Angers, SFR MATRIX, 2 Bd Lavoisier, 49045 Angers Cedex, France
| | - Marc Sallé
- Laboratoire MOLTECH-Anjou, UMR CNRS 6200, UNIV Angers, SFR MATRIX, 2 Bd Lavoisier, 49045 Angers Cedex, France
| | - Daniel B Leznoff
- Department of Chemistry, Simon Fraser University, Burnaby, Canada.
| | - Tim Storr
- Department of Chemistry, Simon Fraser University, Burnaby, Canada.
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17
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Salen-Manganese Complexes and their Application in the Ring-Opening Polymerization of Lactide and ϵ-Caprolactone. ASIAN J ORG CHEM 2019. [DOI: 10.1002/ajoc.201800695] [Citation(s) in RCA: 16] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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18
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Xu R, Hua L, Li X, Yao Y, Leng X, Chen Y. Rare-earth/zinc heterometallic complexes containing both alkoxy-amino-bis(phenolato) and chiral salen ligands: synthesis and catalytic application for copolymerization of CO2 with cyclohexene oxide. Dalton Trans 2019; 48:10565-10573. [DOI: 10.1039/c9dt00064j] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
Abstract
Ten rare-earth/zinc heterometallic complexes were synthesized and their catalytic application for copolymerization of CO2 with cyclohexene oxide was explored.
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Affiliation(s)
- Ruoyu Xu
- State Key Laboratory of Organometallic Chemistry
- Shanghai Institute of Organic Chemistry
- Chinese Academy of Sciences
- Shanghai 200032
- P. R. China
| | - Linyan Hua
- Key Laboratory of Organic Synthesis of Jiangsu Province and State and Local Joint Engineering Laboratory for Novel Functional Polymeric Materials
- College of Chemistry
- Chemical Engineering and Materials Science
- Dushu Lake Campus
- Soochow University
| | - Xiang Li
- State Key Laboratory of Organometallic Chemistry
- Shanghai Institute of Organic Chemistry
- Chinese Academy of Sciences
- Shanghai 200032
- P. R. China
| | - Yingming Yao
- Key Laboratory of Organic Synthesis of Jiangsu Province and State and Local Joint Engineering Laboratory for Novel Functional Polymeric Materials
- College of Chemistry
- Chemical Engineering and Materials Science
- Dushu Lake Campus
- Soochow University
| | - Xuebing Leng
- State Key Laboratory of Organometallic Chemistry
- Shanghai Institute of Organic Chemistry
- Chinese Academy of Sciences
- Shanghai 200032
- P. R. China
| | - Yaofeng Chen
- State Key Laboratory of Organometallic Chemistry
- Shanghai Institute of Organic Chemistry
- Chinese Academy of Sciences
- Shanghai 200032
- P. R. China
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19
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Tcyrulnikov S, Curto JM, Gilmartin PH, Kozlowski MC. Lewis Acid-Promoted Enantioselective Dearomative Spirocyclizations of Allenes. J Org Chem 2018; 83:12207-12212. [PMID: 30141933 DOI: 10.1021/acs.joc.8b01565] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
A chiral oxazaborolidine combined with SnCl4 has been found to promote the dearomative spirocyclization of electron-rich benzyl allenyl ketones. The reaction outcome is sensitive to the nature of activating acid, which was rationalized using hard-soft acid-base (HSAB) theory. The spirocyclic product was obtained with up to 72% ee, which is the best result reported to date for these substrates. The formation of cross-conjugated or conjugated products is readily controlled by changing the oxygen-protecting groups.
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Affiliation(s)
- Sergei Tcyrulnikov
- Department of Chemistry , University of Pennsylvania , Philadelphia , Pennsylvania 19104 , United States
| | - John M Curto
- Department of Chemistry , University of Pennsylvania , Philadelphia , Pennsylvania 19104 , United States
| | - Philip H Gilmartin
- Department of Chemistry , University of Pennsylvania , Philadelphia , Pennsylvania 19104 , United States
| | - Marisa C Kozlowski
- Department of Chemistry , University of Pennsylvania , Philadelphia , Pennsylvania 19104 , United States
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20
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Zhao J, Dang F, Liu B, Wu Y, Yang X, Zhou G, Wu Z, Wong WY. Bis-Zn II salphen complexes bearing pyridyl functionalized ligands for efficient organic light-emitting diodes (OLEDs). Dalton Trans 2018; 46:6098-6110. [PMID: 28436501 DOI: 10.1039/c7dt00905d] [Citation(s) in RCA: 26] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2022]
Abstract
Inspired by the emissive features of ZnII complexes based on bis-Schiff base ligands, bis-ZnII salphen complexes bearing pyridyl functionalized ligands have been successfully synthesized. Their photophysical features, electrochemical behavior and electroluminescent (EL) properties have been investigated in detail. The functionalized bis-ZnII salphen complexes can exhibit high thermal stability up to 417 °C, and their photoluminescence (PL) spectra show a maximal emission wavelength peak at ca. 565 nm both in solution and PMMA doped films. The PL investigation of the neat films for these functionalized bis-ZnII salphen complexes indicated that the pyridyl functionalized ligands can effectively reduce the degree of molecular aggregation to enhance their emission intensity. Taking advantage of the charge carrier injection/transporting ability of the pyridyl functionalized ligands and their dendritic design, the optimized EL devices fabricated by a simple solution-processing method can achieve a peak luminance (Lmax) of 3589 cd m-2, a maximal external quantum efficiency (ηext) of 1.46%, a maximal current efficiency (ηL) of 4.1 cd A-1 and a maximal power efficiency (ηp) of 3.8 lm W-1. These results should afford important instructions for exploiting high performance fluorescent emitters based on dinuclear ZnII complexes.
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Affiliation(s)
- Jiang Zhao
- MOE Key Laboratory for Nonequilibrium Synthesis and Modulation of Condensed Matter, Institute of Chemistry for New Energy Material, Department of Chemistry, School of Science, State Key Laboratory for Mechanical Behavior of Materials, Xi'an Jiaotong University, Xi'an 710049, P. R. China.
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21
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Facile access to polymer supported zinc–salen complex: highly efficient heterogeneous catalyst for synthesizing hydantoins, thiohydantoins and Schiff bases in aqueous medium. RESEARCH ON CHEMICAL INTERMEDIATES 2017. [DOI: 10.1007/s11164-017-3215-x] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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22
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Duan R, Hu C, Li X, Pang X, Sun Z, Chen X, Wang X. Air-Stable Salen–Iron Complexes: Stereoselective Catalysts for Lactide and ε-Caprolactone Polymerization through in Situ Initiation. Macromolecules 2017. [DOI: 10.1021/acs.macromol.7b01766] [Citation(s) in RCA: 49] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Affiliation(s)
- Ranlong Duan
- Key Laboratory of
Polymer Ecomaterials, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, 5625 Renmin Street, Changchun 130022, P. R. China
| | - Chenyang Hu
- Key Laboratory of
Polymer Ecomaterials, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, 5625 Renmin Street, Changchun 130022, P. R. China
- University of Chinese Academy of Sciences, Beijing 100049, P. R. China
| | - Xiang Li
- Key Laboratory of
Polymer Ecomaterials, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, 5625 Renmin Street, Changchun 130022, P. R. China
| | - Xuan Pang
- Key Laboratory of
Polymer Ecomaterials, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, 5625 Renmin Street, Changchun 130022, P. R. China
| | - Zhiqiang Sun
- Key Laboratory of
Polymer Ecomaterials, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, 5625 Renmin Street, Changchun 130022, P. R. China
| | - Xuesi Chen
- Key Laboratory of
Polymer Ecomaterials, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, 5625 Renmin Street, Changchun 130022, P. R. China
| | - Xianhong Wang
- Key Laboratory of
Polymer Ecomaterials, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, 5625 Renmin Street, Changchun 130022, P. R. China
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23
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Thakurta S, Butcher RJ, Frontera A, Mitra S. Theoretical investigation on molecular structure of a new mononuclear copper(II) thiocyanato complex with tridentate Schiff base ligand. J COORD CHEM 2017. [DOI: 10.1080/00958972.2017.1394460] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
Affiliation(s)
| | - Ray J. Butcher
- Department of Chemistry, Howard University, Washington, DC, USA
| | - Antonio Frontera
- Departament de Química, Universitat de les Illes Balears, Baleares, Spain
| | - Samiran Mitra
- Department of Chemistry, Jadavpur University, Kolkata, India
- Department of Chemistry, Heritage Institute of Technology, Kolkata, India
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24
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A New Trinuclear Zn(II) Complex {[Zn(μ-ONN)(μ2-O)(μ-OO)]2Zn}: Synthesis, Characterization, Thermal Decomposition and Antibacterial Activity. J CLUST SCI 2017. [DOI: 10.1007/s10876-017-1290-1] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
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25
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Hoffmann RC, Sanctis S, Schneider JJ. Molecular Precursors for ZnO Nanoparticles: Field-Assisted Synthesis, Electrophoretic Deposition, and Field-Effect Transistor Device Performance. Inorg Chem 2017; 56:7550-7557. [DOI: 10.1021/acs.inorgchem.7b01088] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Rudolf C. Hoffmann
- Fachbereich Chemie, Eduard-Zintl-Institut,
Fachgebiet Anorganische Chemie, Technische Universität Darmstadt, Alarich-Weiss-Straße 12, 64287 Darmstadt, Germany
| | - Shawn Sanctis
- Fachbereich Chemie, Eduard-Zintl-Institut,
Fachgebiet Anorganische Chemie, Technische Universität Darmstadt, Alarich-Weiss-Straße 12, 64287 Darmstadt, Germany
| | - Jörg J. Schneider
- Fachbereich Chemie, Eduard-Zintl-Institut,
Fachgebiet Anorganische Chemie, Technische Universität Darmstadt, Alarich-Weiss-Straße 12, 64287 Darmstadt, Germany
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26
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Saha S, Choudhury CR, Pilet G, Frontera A, Mitra S. Design of end-on cyanato bridged trinuclear Cu(II) Schiff base complex with salen type Schiff base ligand: synthesis, structural investigation and DFT study. J COORD CHEM 2017. [DOI: 10.1080/00958972.2017.1287354] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
Affiliation(s)
- Sandeepta Saha
- Department of Chemistry, Jadavpur University, Kolkata, India
| | | | - Guillaume Pilet
- Groupe de Crystallographieet Ingénierie Moléculaire, Laboratoire des Multimatériaux et Interfaces, UMR 5615 CNRS-Université Claude Bernard Lyon 1, Villeurbanne Cedex, France
| | - Antonio Frontera
- Departamen de Química, Universitat de les Illes Balears, Palma de Mallorca, Spain
| | - Samiran Mitra
- Department of Chemistry, Jadavpur University, Kolkata, India
- Department of Chemistry, Heritage Institute of Technology, Kolkata, India
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27
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Dong J, Tan C, Zhang K, Liu Y, Low PJ, Jiang J, Cui Y. Chiral NH-Controlled Supramolecular Metallacycles. J Am Chem Soc 2017; 139:1554-1564. [PMID: 28059502 DOI: 10.1021/jacs.6b11422] [Citation(s) in RCA: 107] [Impact Index Per Article: 15.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Abstract
Chiral NH functionalities-based discrimination is a key feature of Nature's chemical armory, yet selective binding of biologically active molecules in synthetic systems with high enantioselectivity poses significant challenges. Here we report the assembly of three chiral fluorescent Zn6L6 metallacycles from pyridyl-functionalized Zn(salalen) or Zn(salen) complexes. Each of these metallacycles has a nanoscale hydrophobic cavity decorated with six, three, or zero chiral NH functionalities and packs into a three-dimensional supramolecular porous framework. The binding affinity and enantioselectivity of the metallacycles toward α-hydroxycarboxylic acids, amino acids, small molecule pharamaceuticals (l-dopa, d-penicillamine), and chiral amines increase with the number of chiral NH moieties in the cyclic structure. From single-crystal X-ray diffraction, molecular simulations, and quantum chemical calculations, the chiral recognition and discrimination are attributed to the specific binding of enantiomers in the chiral pockets of the metallacycles. The parent metallacycles are fluorescent with the intensity of emission being linearly related to the enantiomeric composition of the chiral biorelevant guests, which allow them to be utilized in chiral sensing. The fact that manipulation of chiral NH functionalities in metallacycles can control the enantiorecognition of biomolecular complexes would facilitate the design of more effective supramolecular assemblies for enantioselective processes.
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Affiliation(s)
- Jinqiao Dong
- School of Chemistry and Chemical Technology and State Key Laboratory of Metal Matrix Composites, Shanghai Jiao Tong University , Shanghai 200240, China
| | - Chunxia Tan
- School of Chemistry and Chemical Technology and State Key Laboratory of Metal Matrix Composites, Shanghai Jiao Tong University , Shanghai 200240, China
| | - Kang Zhang
- Department of Chemical and Biomolecular Engineering, National University of Singapore , 4 Engineering Drive 4, 117576 Singapore
| | - Yan Liu
- School of Chemistry and Chemical Technology and State Key Laboratory of Metal Matrix Composites, Shanghai Jiao Tong University , Shanghai 200240, China
| | - Paul J Low
- School of Chemistry and Biochemistry, University of Western Australia , 35 Stirling Highway, Crawley, WA 6009, Australia
| | - Jianwen Jiang
- Department of Chemical and Biomolecular Engineering, National University of Singapore , 4 Engineering Drive 4, 117576 Singapore
| | - Yong Cui
- School of Chemistry and Chemical Technology and State Key Laboratory of Metal Matrix Composites, Shanghai Jiao Tong University , Shanghai 200240, China.,Collaborative Innovation Center of Chemical Science and Engineering , Tianjin 300072, China
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28
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More M, Pawal S, Lolage S, Chavan S. Syntheses, structural characterization, luminescence and optical studies of Ni(II) and Zn(II) complexes containing salophen ligand. J Mol Struct 2017. [DOI: 10.1016/j.molstruc.2016.08.083] [Citation(s) in RCA: 25] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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29
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Peng J, Yang HJ, Geng Y, Wei Z, Wang L, Guo CY. Novel, recyclable supramolecular metal complexes for the synthesis of cyclic carbonates from epoxides and CO 2 under solvent-free conditions. J CO2 UTIL 2017. [DOI: 10.1016/j.jcou.2016.10.013] [Citation(s) in RCA: 38] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/22/2023]
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30
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Forte G, Oliveri IP, Consiglio G, Failla S, Di Bella S. On the Lewis acidic character of bis(salicylaldiminato)zinc(ii) Schiff-base complexes: a computational and experimental investigation on a series of compounds varying the bridging diimine. Dalton Trans 2017; 46:4571-4581. [DOI: 10.1039/c7dt00574a] [Citation(s) in RCA: 29] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
Abstract
The electronic effects induced by the geometry of the 1,2-diimine bridge control the Lewis acidic character in a series of ZnII Shiff-base complexes.
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Affiliation(s)
- Giuseppe Forte
- Dipartimento di Scienze del Farmaco
- Università di Catania
- I-95125 Catania
- Italy
| | | | - Giuseppe Consiglio
- Dipartimento di Scienze Chimiche
- Università di Catania
- I-95125 Catania
- Italy
| | - Salvatore Failla
- Dipartimento di Scienze Chimiche
- Università di Catania
- I-95125 Catania
- Italy
| | - Santo Di Bella
- Dipartimento di Scienze Chimiche
- Università di Catania
- I-95125 Catania
- Italy
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31
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Han Y, Feng Q, Zhang Y, Zhang Y, Yao W. Ring-opening polymerization of rac-lactide by mononuclear zinc complexes that contain chiral tetra-azane ligands. Polyhedron 2017. [DOI: 10.1016/j.poly.2016.10.010] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
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32
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Khan T, Vaidya S, Mhatre DS, Datta A. The Prospect of Salophen in Fluorescence Lifetime Sensing of Al3+. J Phys Chem B 2016; 120:10319-10326. [DOI: 10.1021/acs.jpcb.6b05854] [Citation(s) in RCA: 32] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/02/2023]
Affiliation(s)
- Tuhin Khan
- Department
of Chemistry, Indian Institute of Technology Bombay, Powai, Mumbai-400076, India
| | - Shefali Vaidya
- Department
of Chemistry, Indian Institute of Technology Bombay, Powai, Mumbai-400076, India
| | - Darshan S. Mhatre
- Department
of Chemistry, Indian Institute of Technology Bombay, Powai, Mumbai-400076, India
| | - Anindya Datta
- Department
of Chemistry, Indian Institute of Technology Bombay, Powai, Mumbai-400076, India
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33
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Consiglio G, Oliveri IP, Failla S, Di Bella S. Supramolecular Aggregates of Defined Stereochemical Scaffolds: Aggregation/Deaggregation in Schiff-Base Zinc(II) Complexes Derived from Enantiopure trans-1,2-Diaminocyclohexane. Inorg Chem 2016; 55:10320-10328. [DOI: 10.1021/acs.inorgchem.6b01580] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
Affiliation(s)
- Giuseppe Consiglio
- Dipartimento di Scienze Chimiche, Università di Catania, I-95125 Catania, Italy
| | - Ivan Pietro Oliveri
- Dipartimento di Scienze Chimiche, Università di Catania, I-95125 Catania, Italy
| | - Salvatore Failla
- Dipartimento di Scienze Chimiche, Università di Catania, I-95125 Catania, Italy
| | - Santo Di Bella
- Dipartimento di Scienze Chimiche, Università di Catania, I-95125 Catania, Italy
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34
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Shit S, Nandy M, Saha D, Zhang L, Schmitt W, Rizzoli C, Row TNG. Synthesis, crystal structure and fluorescence properties of two dinuclear zinc(II) complexes incorporating tridentate (NNO) Schiff bases. J COORD CHEM 2016. [DOI: 10.1080/00958972.2016.1197390] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
Affiliation(s)
- Shyamapada Shit
- Department of Chemistry, Jalpaiguri Government Engineering College, Jalpaiguri, India
| | | | - Dipankar Saha
- Department of Chemistry and iNANO, Center for Materials Crystallography, Aarhus University, Aarhus C, Denmark
| | - Lei Zhang
- School of Chemistry, Trinity College Dublin, University of Dublin, Dublin, Ireland
| | - Wolfgang Schmitt
- School of Chemistry, Trinity College Dublin, University of Dublin, Dublin, Ireland
| | - Corrado Rizzoli
- Dipartimento di Chimica, Università, degli Studi di Parma, Parma, Italy
| | - Tayur N. Guru Row
- Solid State and Structural Chemistry Unit, Indian Institute of Science, Bangalore, India
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35
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Naeimi H, Nazifi ZS. Convenient and Mild Template Synthesis and Characterization of Some New Schiff Base Complexes of Uranyl (II). NATIONAL ACADEMY SCIENCE LETTERS 2016. [DOI: 10.1007/s40009-016-0447-z] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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36
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Hardy EE, Eddy MA, Maynard BA, Gorden AEV. Solid state π–π stacking and higher order dimensional crystal packing, reactivity, and electrochemical behaviour of salphenazine actinide and transition metal complexes. Dalton Trans 2016; 45:14243-51. [DOI: 10.1039/c6dt02389d] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
Abstract
Here, we describe and compare the synthesis, solution characterization, and solid-state behaviour of the salphenazine ligand and metal complexes.
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Affiliation(s)
- E. E. Hardy
- Department of Chemistry and Biochemistry
- Auburn University
- Auburn
- USA
| | - M. A. Eddy
- Department of Chemistry and Biochemistry
- Auburn University
- Auburn
- USA
| | - B. A. Maynard
- Department of Chemistry and Biochemistry
- Auburn University
- Auburn
- USA
| | - A. E. V. Gorden
- Department of Chemistry and Biochemistry
- Auburn University
- Auburn
- USA
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37
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Grivani G, Eigner V, Dušek M, Sadeghi B, Khalaji AD. New μ-OAC bridged dinuclear copper(II) complex with tridentate Schiff base ligand: Synthesis, characterization, crystal structure, and CuO nano-particles formation. RUSS J COORD CHEM+ 2015. [DOI: 10.1134/s1070328415070027] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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38
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Roy N, Pramanik HAR, Paul PC, Singh TS. A highly sensitive and selective fluorescent chemosensor for detection of Zn2+ based on a Schiff base. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2015; 140:150-155. [PMID: 25590829 DOI: 10.1016/j.saa.2014.12.106] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/12/2014] [Revised: 11/24/2014] [Accepted: 12/28/2014] [Indexed: 06/04/2023]
Abstract
A Schiff-base fluorescent probe - 2-((E)-(quinolin-8-ylimino)methyl)quinolin-8-ol (H7L) was synthesized and evaluated as a chemoselective Zn2+ sensor. Upon treatment with Zn2+, the complexation of H7L with Zn2+ resulted in a red shift with a pronounced enhancement in the fluorescence emission intensity in ethanol solution. Moreover, other common alkali, alkaline earth and transition metal ions failed to induce response or minimal spectral changes. Notably, this chemosensor could distinguish clearly Zn2+ from Cd2+. Fluorescence studies on H7L and H7L-Zn2+ complex reveal that the quantum yield strongly increases upon coordination. The stoichiometric ratio and association constant were evaluated using Benesi-Hildebrand relation giving 1:1 stoichiometry. This further corroborated 1:1 complex formation based on Job's plot analyses. This chemosensor exhibits a very good fluorescence sensing ability to Zn2+ over a wide range of pH.
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Affiliation(s)
- Nayan Roy
- Department of Chemistry, Assam University, Silchar, Assam 788 011, India
| | - Harun A R Pramanik
- Department of Chemistry, Assam University, Silchar, Assam 788 011, India
| | - Pradip C Paul
- Department of Chemistry, Assam University, Silchar, Assam 788 011, India
| | - T Sanjoy Singh
- Department of Chemistry, Assam University, Silchar, Assam 788 011, India.
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39
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Das K, Datta A, Nandi S, Mane SB, Mondal S, Massera C, Sinha C, Hung CH, Askun T, Celikboyun P, Cantürk Z, Garribba E, Akitsu T. A Ni(ii) dinuclear complex bridged by end-on azide-N and phenolate-O atoms: spectral interpretation, magnetism and biological study. Inorg Chem Front 2015. [DOI: 10.1039/c5qi00060b] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A new dinuclear complex, [Ni(L)(μ1,1-N3)Ni(L)(OH2)2]·ClO4(1), has been synthesized. It shows the presence of ferromagnetic interactions and is endowed with both anti-mycobacterial and anticancer properties.
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Affiliation(s)
- Kuheli Das
- Department of Chemistry
- Jadavpur University
- Kolkata 700032
- India
| | | | | | | | - Sudipa Mondal
- Department of Chemistry
- Jadavpur University
- Kolkata 700032
- India
| | - Chiara Massera
- Dipartimento di Chimica
- Università degli Studi di Parma
- Parma
- Italy
| | | | | | - Tulin Askun
- Department of Biology
- Faculty of Sciences and Arts
- University of Balikesir
- Cagis Campus
- Balikesir
| | - Pinar Celikboyun
- Department of Biology
- Faculty of Sciences and Arts
- University of Balikesir
- Cagis Campus
- Balikesir
| | - Zerrin Cantürk
- Department of Pharmaceutical Microbiology
- Pharmacy Faculty
- Anadolu University
- Yunusemre Campus
- Eskisehir
| | - Eugenio Garribba
- Dipartimento di Chimica e Farmacia
- and Centro Interdisciplinare per lo Sviluppo della Ricerca Biotecnologica e per lo Studio della Biodiversità della Sardegna
- Università di Sassari
- I-07100 Sassari
- Italy
| | - Takashiro Akitsu
- Department of Chemistry
- Faculty of Science
- Tokyo University of Science
- Tokyo 162-8601
- Japan
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40
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Mahalakshmi N, Rajavel R. Synthesis, spectroscopic, DNA cleavage and antibacterial activity of binuclear schiff base complexes. ARAB J CHEM 2014. [DOI: 10.1016/j.arabjc.2010.11.010] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022] Open
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41
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Oliveri IP, Malandrino G, Di Bella S. Phase Transition and Vapochromism in Molecular Assemblies of a Polymorphic Zinc(II) Schiff-Base Complex. Inorg Chem 2014; 53:9771-7. [DOI: 10.1021/ic5013632] [Citation(s) in RCA: 39] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
Affiliation(s)
- Ivan Pietro Oliveri
- Dipartimento
di Scienze Chimiche, Università di Catania, I-95125 Catania, Italy
| | | | - Santo Di Bella
- Dipartimento
di Scienze Chimiche, Università di Catania, I-95125 Catania, Italy
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42
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Oliveri IP, Malandrino G, Di Bella S. Self-assembled nanostructures of amphiphilic zinc(II) salophen complexes: role of the solvent on their structure and morphology. Dalton Trans 2014; 43:10208-14. [PMID: 24875135 DOI: 10.1039/c4dt00973h] [Citation(s) in RCA: 27] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/03/2023]
Abstract
This contribution explores the effect of several solvent properties, such as volatility, polarity, and Lewis basicity on the formation of molecular self-assembled nanostructures in the solid state, obtained either by casting of related solutions or by complete solvent evaporation, using seven solvents representative of common classes of coordinating organic solvents, of an amphiphilic Zn(II) Schiff-base complex. In all cases, the existence of well-defined X-ray diffraction patterns, for both the cast and powder samples, indicates a strong tendency towards the molecular self-assembly of such complexes. While nanostructures formed in acetone, THF, pyridine, and DMF have a lamellar organization, those formed in ACN, ethanol, and DMSO exhibit a 2D columnar square structure. Field emission scanning electron microscopy analysis indicates that nanostructures formed in volatile acetone, THF, ACN, and ethanol solvents show a fibrous morphology, while those formed in less volatile pyridine, DMF, and DMSO have a ribbon appearance. Overall, the results indicate that while the formation of such nanostructures is independent of the Lewis basicity of the solvent, the solvent polarity affects their structure - more polar solvents favour higher symmetry structures - and the solvent volatility influences their morphology and ordering in the cast films - lower volatility of the solvent parallels the formation of much more ordered structures. Therefore, the appropriate choice of solvent allows control of the structure, morphology, and ordering of these molecular assemblies.
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Affiliation(s)
- Ivan Pietro Oliveri
- Dipartimento di Scienze Chimiche, Università di Catania, I-95125 Catania, Italy.
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43
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Słomińska B, Chaładaj W, Danikiewicz W. Assessment of the various ionization methods in the analysis of metal salen complexes by mass spectrometry. JOURNAL OF MASS SPECTROMETRY : JMS 2014; 49:392-399. [PMID: 24809900 DOI: 10.1002/jms.3353] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/18/2013] [Revised: 02/08/2014] [Accepted: 02/21/2014] [Indexed: 06/03/2023]
Abstract
Metal salen complexes are one of the most frequently used catalysts in enantioselective organic synthesis. In the present work, we compare a series of ionization methods that can be used for the mass spectral analysis of two types of metalosalens: ionic complexes (abbreviated as Com(+)X(-)) and neutral complexes (NCom). These methods include electron ionization and field desorption (FD) which can be applied to pure samples and atmospheric pressure ionization techniques: electrospray ionization (ESI), atmospheric pressure chemical ionization (APCI) and atmospheric pressure photoionization (APPI) which are suitable for solutions. We found that FD is a method of choice for recording molecular ions of the complexes containing even loosely bonded ligands. The results obtained using atmospheric pressure ionization methods show that the results depend mainly on the structure of metal salen complex and the ionization method. In ESI spectra, Com(+) ions were observed, while in APCI and APPI spectra both Com(+) and [Com + H](+) ions are observed in the ratio depending on the structure of the metal salen complex and the solvent used in the analysis. For complexes with tetrafluoroborate counterion, an elimination of BF3 took place, and ions corresponding to complexes with fluoride counterion were observed. Experiments comparing the relative sensitivity of ESI, APCI and APPI (with and without a dopant) methods showed that for the majority of the studied complexes ESI is the most sensitive one; however, the sensitivity of APCI is usually less than two times lower and for some compounds is even higher than the sensitivity of ESI. Both methods show very high linearity of the calibration curve in a range of about 3 orders of magnitude of the sample concentration.
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Affiliation(s)
- Beata Słomińska
- Institute of Organic Chemistry, Polish Academy of Sciences, Kasprzaka 44/52, 01-224, Warsaw, Poland; University of Warsaw, Faculty of Biology, Miecznikowa 1, 02-096, Warsaw, Poland
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A Sensitive Schiff-Base Fluorescent Chemosensor for the Selective Detection of Zn2+. J Fluoresc 2014; 24:1099-106. [DOI: 10.1007/s10895-014-1390-3] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/29/2014] [Accepted: 04/07/2014] [Indexed: 01/29/2023]
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A new linear double phenoxide-bridged trinuclear Cu(II) Schiff base complex: Synthesis, crystallographic elucidation, magneto-structural correlation and DFT Study. Polyhedron 2014. [DOI: 10.1016/j.poly.2013.12.006] [Citation(s) in RCA: 45] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
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46
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Zhang XM, Li JQ, Liu SJ, Luo MB, Xu WY, Luo F. Modulation of experimental conditions towards generation of a heterometallic Na2Co4 cluster or a homometallic Co4 cluster and ligand formed in situ. CrystEngComm 2014. [DOI: 10.1039/c3ce42466a] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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Oliveri IP, Failla S, Colombo A, Dragonetti C, Righetto S, Di Bella S. Synthesis, characterization, optical absorption/fluorescence spectroscopy, and second-order nonlinear optical properties of aggregate molecular architectures of unsymmetrical Schiff-base zinc(ii) complexes. Dalton Trans 2014; 43:2168-75. [DOI: 10.1039/c3dt53072h] [Citation(s) in RCA: 55] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/13/2023]
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Singh TS, Paul PC, Pramanik HAR. Fluorescent chemosensor based on sensitive Schiff base for selective detection of Zn2+. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2013; 121:520-526. [PMID: 24291428 DOI: 10.1016/j.saa.2013.11.002] [Citation(s) in RCA: 28] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/16/2013] [Revised: 10/09/2013] [Accepted: 11/03/2013] [Indexed: 06/02/2023]
Abstract
A Schiff-base fluorescent compound - N, N'-bis(salicylidene)-1,2 - phenylenediamine (LH2) was synthesized and evaluated as a chemoselective Zn(2+) sensor. Addition of Zn(2+) to ethanol solution of LH2 resulted in a red shift with a pronounced enhancement in the fluorescence intensity. Moreover, other common alkali, alkaline earth and transition metal ions failed to induce response or minimal spectral changes. Notably, this chemosensor could distinguish clearly Zn(2+) from Cd(2+). Fluorescence studies on free Schiff base ligand LH2 and LH2 - Zn(2+) complex reveal that the quantum yield strongly increases upon coordination. The stoichiometric ratio and association constant were evaluated using Benesi - Hildebrand relation giving 1:1 stoichiometry. This further corroborated 1:1 complex formation based on Job's plot analyses.
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Affiliation(s)
- T Sanjoy Singh
- Department of Chemistry, Assam University, Silchar, Assam 788 011, India.
| | - Pradip C Paul
- Department of Chemistry, Assam University, Silchar, Assam 788 011, India
| | - Harun A R Pramanik
- Department of Chemistry, Assam University, Silchar, Assam 788 011, India
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Reid EF, Cook VC, Wilson DJD, Hogan CF. Facile Tuning of Luminescent Platinum(II) Schiff Base Complexes from Yellow to Near-Infrared: Photophysics, Electrochemistry, Electrochemiluminescence and Theoretical Calculations. Chemistry 2013; 19:15907-17. [DOI: 10.1002/chem.201302339] [Citation(s) in RCA: 28] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/19/2013] [Indexed: 02/02/2023]
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Ren Y, Cheng X, Yang S, Qi C, Jiang H, Mao Q. A chiral mixed metal-organic framework based on a Ni(saldpen) metalloligand: synthesis, characterization and catalytic performances. Dalton Trans 2013; 42:9930-7. [PMID: 23695202 DOI: 10.1039/c3dt50664a] [Citation(s) in RCA: 89] [Impact Index Per Article: 8.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A three-dimensional (3D) chiral mixed metal-organic framework [Cd4Cl(Ni-L)3(Ni-HL)(H2O)6(DMF)]·4DMF (CMOF 1) based on a new enantiopure dicarboxyl-functionalized Ni(saldpen) metalloligand Ni-H2L and a novel tetranuclear cadmium cluster [Cd4Cl(CO2)7(CO2H)] has been synthesized and characterized by elemental analyses, IR and UV-vis spectra, thermogravimetric analysis, nitrogen and carbon dioxide adsorption, powder and single-crystal X-ray diffractions. Each tetranuclear-cadmium cluster in 1 is linked by eight Ni-L ligands, and each Ni-L ligand is linked by two tetranuclear-cadmium clusters to generate a 3D framework with 1D open channels (∼1.1 × 0.9 nm(2)) along the b-axis. Based on its good stability, permanent porosity, Lewis acid sites and moderate uptake for CO2, 1 can be used as a self-supported heterogeneous catalyst for the synthesis of optically active propylene carbonate by asymmetric cycloaddition of CO2 with racemic propylene oxide under relatively mild conditions.
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Affiliation(s)
- Yanwei Ren
- School of Chemistry and Chemical Engineering, South China University of Technology, Guangzhou 510640, China
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