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Zhang H, Chan MHY, Lam J, Chen Z, Leung MY, Wong EKH, Wu L, Yam VWW. Supramolecular assembly of amphiphilic platinum(ii) Schiff base complexes: diverse spectroscopic changes and nanostructures through rational molecular design and solvent control. Chem Sci 2024; 15:8545-8556. [PMID: 38846386 PMCID: PMC11151868 DOI: 10.1039/d3sc06094b] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/14/2023] [Accepted: 04/15/2024] [Indexed: 06/09/2024] Open
Abstract
A new class of amphiphilic tetradentate platinum(ii) Schiff base complexes has been designed and synthesized. The self-assembly properties by exploiting the potential Pt⋯Pt interactions of amphiphilic platinum(ii) Schiff base complexes in the solution state have been systematically investigated. The presence of Pt⋯Pt interactions has further been supported by computational studies and non-covalent interaction (NCI) analysis of the dimer of the complex. The extent of the non-covalent Pt⋯Pt and π-π interactions could be regulated by a variation of the solvent compositions and the hydrophobicity of the complexes, which is accompanied by attractive spectroscopic and luminescence changes and leads to diverse morphological transformations. The present work represents a rare example of demonstration of directed cooperative assembly of amphiphilic platinum(ii) Schiff base complexes by intermolecular Pt⋯Pt interactions in solution with an in-depth mechanistic investigation, providing guiding principles for the construction of supramolecular structures with desirable properties using platinum(ii) Schiff base building blocks.
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Affiliation(s)
- Huilan Zhang
- State Key Laboratory of Supramolecular Structure and Materials, College of Chemistry, Jilin University Changchun 130012 P. R. China
- Institute of Molecular Functional Materials, Department of Chemistry, The University of Hong Kong Pokfulam Road Hong Kong SAR P. R. China
| | - Michael Ho-Yeung Chan
- Institute of Molecular Functional Materials, Department of Chemistry, The University of Hong Kong Pokfulam Road Hong Kong SAR P. R. China
| | - Jonathan Lam
- Institute of Molecular Functional Materials, Department of Chemistry, The University of Hong Kong Pokfulam Road Hong Kong SAR P. R. China
| | - Ziyong Chen
- Institute of Molecular Functional Materials, Department of Chemistry, The University of Hong Kong Pokfulam Road Hong Kong SAR P. R. China
| | - Ming-Yi Leung
- Institute of Molecular Functional Materials, Department of Chemistry, The University of Hong Kong Pokfulam Road Hong Kong SAR P. R. China
| | - Eric Ka-Ho Wong
- Institute of Molecular Functional Materials, Department of Chemistry, The University of Hong Kong Pokfulam Road Hong Kong SAR P. R. China
| | - Lixin Wu
- State Key Laboratory of Supramolecular Structure and Materials, College of Chemistry, Jilin University Changchun 130012 P. R. China
| | - Vivian Wing-Wah Yam
- State Key Laboratory of Supramolecular Structure and Materials, College of Chemistry, Jilin University Changchun 130012 P. R. China
- Institute of Molecular Functional Materials, Department of Chemistry, The University of Hong Kong Pokfulam Road Hong Kong SAR P. R. China
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2
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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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3
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Excited state dynamics of Zn-salophen complexes. Photochem Photobiol Sci 2022; 21:923-934. [PMID: 35088368 DOI: 10.1007/s43630-021-00165-0] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/04/2021] [Accepted: 12/27/2021] [Indexed: 10/19/2022]
Abstract
Zn-salophen complexes are a promising class of fluorescent chemosensors for nucleotides and nucleic acids. We have investigated, by means of steady state UV-Vis, ultrafast transient absorption, fluorescence emission and time dependent density functional theory (TD-DFT) the behavior of the excited states of a salicylidene tetradentate Schiff base (Sal), its Zn(II) coordination compound (Zn-Sal) and the effect of the interaction between Zn-Sal and adenosine diphosphate (ADP). TD-DFT shows that the deactivation of the excited state of Sal occurs through torsional motion, due to its rotatable bonds and twistable angles. Complexation with Zn(II) causes rigidity so that the geometry changes in the excited states with respect to the ground state structure are minimal. By addition of ADP to a freshly prepared Zn-Sal ethanol solution, a longer relaxation constant, in comparison to Zn-Sal, was measured, indicative of the interaction between Zn-Sal and ADP. After a few days, the Zn-Sal-ADP solution displayed the same static and dynamic behavior of a solution containing only the Sal ligand, demonstrating that the coordination of the ADP anion to Zn(II)leads to the demetallation of the Sal ligand. Fluorescence measurements also revealed an enhanced fluorescence at 375 nm following the addition of ADP to the solution, caused by the presence of 2,3-diamino naphthalene that is formed by demetallation and partial decomposition of the Sal ligand. The efficient fluorescence of this species at 375 nm could be selectively detected and used as a probe for the detection of ADP in solution.
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Ullmann S, Börner M, Kahnt A, Abel B, Kersting B. Green‐Emissive Zn
2+
Complex Supported by a Macrocyclic Schiff‐Base/Calix[4]arene‐Ligand: Crystallographic and Spectroscopic Characterization. Eur J Inorg Chem 2021. [DOI: 10.1002/ejic.202100442] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Affiliation(s)
- Steve Ullmann
- Institut für Anorganische Chemie Universität Leipzig Johannisallee 29 04103 Leipzig Germany
- Institut für Nichtklassische Chemie e.V. Permoserstraße. 15 04318 Leipzig
| | - Martin Börner
- Institut für Anorganische Chemie Universität Leipzig Johannisallee 29 04103 Leipzig Germany
- Leibniz Institute of Surface Engineering (IOM) Department of Functional Surfaces Permoserstr. 15 04318 Leipzig Germany
| | - Axel Kahnt
- Leibniz Institute of Surface Engineering (IOM) Department of Functional Surfaces Permoserstr. 15 04318 Leipzig Germany
| | - Bernd Abel
- Leibniz Institute of Surface Engineering (IOM) Department of Functional Surfaces Permoserstr. 15 04318 Leipzig Germany
- Wilhelm-Ostwald-Institut für Physikalische und Theoretische Chemie Universität Leipzig Linnéstraße 2 04103 Leipzig Germany
| | - Berthold Kersting
- Institut für Anorganische Chemie Universität Leipzig Johannisallee 29 04103 Leipzig Germany
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5
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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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6
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Realista S, Oliveira B, Aldeias J, Fernández-Moreira V, Concepción Gimeno M, Viana AS, Calhorda MJ, Martinho PN. Structural and electronic properties in asymmetric binuclear Zn(II) amphiphilic compounds. J COORD CHEM 2020. [DOI: 10.1080/00958972.2020.1737325] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
Affiliation(s)
- Sara Realista
- Biosystems and Integrative Sciences Institute (BioISI), Faculdade de Ciências, Universidade de Lisboa, Lisboa, Portugal
| | - Bárbara Oliveira
- Biosystems and Integrative Sciences Institute (BioISI), Faculdade de Ciências, Universidade de Lisboa, Lisboa, Portugal
| | - Joana Aldeias
- Biosystems and Integrative Sciences Institute (BioISI), Faculdade de Ciências, Universidade de Lisboa, Lisboa, Portugal
| | - Vanesa Fernández-Moreira
- Departamento de Química Inorgánica, Instituto de Síntesis Química y Catálisis Homogénea (ISQCH, CSIC-Universidad de Zaragoza), Zaragoza, Spain
| | - M. Concepción Gimeno
- Departamento de Química Inorgánica, Instituto de Síntesis Química y Catálisis Homogénea (ISQCH, CSIC-Universidad de Zaragoza), Zaragoza, Spain
| | - Ana S. Viana
- Centro de Química Estrutural, Faculdade de Ciências, Universidade de Lisboa, Lisboa, Portugal
| | - Maria José Calhorda
- Biosystems and Integrative Sciences Institute (BioISI), Faculdade de Ciências, Universidade de Lisboa, Lisboa, Portugal
| | - Paulo N. Martinho
- Biosystems and Integrative Sciences Institute (BioISI), Faculdade de Ciências, Universidade de Lisboa, Lisboa, Portugal
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7
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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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8
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Zelada-Guillén GA, Cuéllar-Sánchez AB, Romero-Ávila M, Escárcega-Bobadilla MV. Synthesis of a Novel Zn-Salphen Building Block and Its Acrylic Terpolymer Counterparts as Tunable Supramolecular Recognition Systems. MOLECULES (BASEL, SWITZERLAND) 2019; 24:molecules24122245. [PMID: 31208097 PMCID: PMC6631749 DOI: 10.3390/molecules24122245] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 05/09/2019] [Revised: 05/25/2019] [Accepted: 05/30/2019] [Indexed: 02/06/2023]
Abstract
In this work, we present the synthesis of a novel Zn-Salphen complex containing an allyl group, which was used as building block in the further preparation of a new family of functional terpolymers. These polymers were obtained through radical co-polymerization with methyl metacrylate (MMA) and n-butyl acrylate (nBuA) in different ratios. The supramolecular recognition behavior of each polymer was evaluated via potentiometric measurements against selected anions in aqueous media. Interestingly, this proof of concept study shows that these systems were selective against only fluoride (F−) or both, fluoride and acetate (OAc−), by tailoring the relative content of Zn-Salphen monomer, thus making them a promising starting point for modular design of chemical sensors through straightforward synthetic approaches.
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Affiliation(s)
- Gustavo A Zelada-Guillén
- School of Chemistry, National Autonomous University of Mexico (UNAM), Circuito Escolar s/n, Ciudad Universitaria, Mexico City 04510, Mexico.
| | - Ana B Cuéllar-Sánchez
- School of Chemistry, National Autonomous University of Mexico (UNAM), Circuito Escolar s/n, Ciudad Universitaria, Mexico City 04510, Mexico.
| | - Margarita Romero-Ávila
- School of Chemistry, National Autonomous University of Mexico (UNAM), Circuito Escolar s/n, Ciudad Universitaria, Mexico City 04510, Mexico.
| | - Martha V Escárcega-Bobadilla
- School of Chemistry, National Autonomous University of Mexico (UNAM), Circuito Escolar s/n, Ciudad Universitaria, Mexico City 04510, Mexico.
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9
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Yan X, Song X, Mu X, Wang Y. Mechanochromic luminescence based on a phthalonitrile-bridging salophen zinc(ii) complex. NEW J CHEM 2019. [DOI: 10.1039/c9nj03704g] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/22/2023]
Abstract
Here, we showcase the impressive stimuli-responsive properties of a luminescent zinc(ii)–salophen complex CN-Zn, highlighting a reversible mechanochromic property.
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Affiliation(s)
- Xianju Yan
- State Key Laboratory of Supramolecular Structure and Materials
- College of Chemistry
- Jilin University
- Changchun 130012
- P. R. China
| | - Xiaoxian Song
- State Key Laboratory of Supramolecular Structure and Materials
- College of Chemistry
- Jilin University
- Changchun 130012
- P. R. China
| | - Xiaoyue Mu
- State Key Laboratory of Supramolecular Structure and Materials
- College of Chemistry
- Jilin University
- Changchun 130012
- P. R. China
| | - Yue Wang
- State Key Laboratory of Supramolecular Structure and Materials
- College of Chemistry
- Jilin University
- Changchun 130012
- P. R. China
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10
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Pyrlin SV, Hine NDM, Kleij AW, Ramos MMD. Self-assembly of bis-salphen compounds: from semiflexible chains to webs of nanorings. SOFT MATTER 2018; 14:1181-1194. [PMID: 29349462 DOI: 10.1039/c7sm02371e] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Abstract
The recently-observed self-assembly of certain salphen-based compounds into neuron-like networks of microrings interconnected with nano-thin strings may suggest a new highly-potent tool for nanoscale patterning. However, the mechanism behind such phenomena needs to be clarified before they can be applied in materials design. Here we show that, in contrast with what was initially presumed, the emergence of a "rings-and-rods" pattern is unlikely to be explained by merging, collapse and piercing of vesicles as in previously reported cases of nanorings self-assembly via non-bonding interactions. We propose an alternative explanation: the compounds under study form a 1D coordination polymer, the fibres of which are elastic enough to fold into toroidal globules upon solvent evaporation, while being able to link separate chains into extended networks. This becomes possible because the structure of the compound's scaffold is found to adopt a very different conformation from that inferred in the original work. Based on ab initio and molecular dynamics calculations we propose a step-by-step description of self-assembly process of a supramolecular structure which explains all the observed phenomena in a simple and clear way. The individual roles of the compound' s scaffold structure, coordination centres, functional groups and solvent effects are also explained, opening a route to control the morphology of self-assembled networks and to synthesize new compounds exhibiting similar behaviour.
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Affiliation(s)
- Sergey V Pyrlin
- Department of Physics and Center of Physics, University of Minho, Campus de Gualtar, Braga 4710-057, Portugal.
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11
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Supramolecular Aggregation of a New Substituted Bis(salicylaldiminato)zinc(II) Schiff-Base Complex Derived from trans-1,2-Diaminocyclohexane. INORGANICS 2018. [DOI: 10.3390/inorganics6010008] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/25/2023] Open
Abstract
In this contribution is reported the synthesis, characterization, and aggregation properties in solution of a novel Zn(II) complex, (R)-2, derived from the enantiopure chiral trans-1,2-diaminocyclohexane and a substituted salicylaldehyde. Detailed 1H NMR, DOSY NMR, optical absorption, and circular dichroism spectroscopic studies and chemical evidence allowed to investigate the nature of aggregate species in solution. The high solubility of (R)-2 in solution of the non-coordinating chloroform solvent leads to formation of various aggregates, some of them consisting of large oligomers estimated to contain up to 27 monomeric units. The chiral trans-stereochemistry of the bridging diamine favors a different aggregation mode in these complexes, both in the oligomers and dimers, involving a tetrahedral coordination geometry around the metal center. Overall data suggest the formation of helical oligomers, (ZnL)n, in freshly prepared chloroform solutions which, by standing or heating, evolve towards a more thermodynamically stable, dinuclear double-helicate Zn2L2 dimer.
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12
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Oliveri IP, Malandrino G, Mirabella S, Di Bella S. Vapochromic and chemiresistive characteristics of a nanostructured molecular material composed of a zinc(ii)-salophen complex. Dalton Trans 2018; 47:15977-15982. [PMID: 30378618 DOI: 10.1039/c8dt03904f] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A ZnII Schiff-base complex shows vapochromic and chemiresistive behaviour when exposed to vapours of a Lewis base.
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Affiliation(s)
| | | | - Salvo Mirabella
- Dipartimento di Fisica ed Astronomia
- Università di Catania
- I-95123 Catania
- Italy
| | - Santo Di Bella
- Dipartimento di Scienze Chimiche
- Università di Catania
- I-95125 Catania
- Italy
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13
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Oliveri IP, Forte G, Consiglio G, Failla S, Di Bella S. Aggregates of Defined Stereochemical Scaffolds: A Study in Solution of a Zinc(II) Schiff Base Complex Derived from the Enantiopure trans-1,2-Cyclopentanediamine. Inorg Chem 2017; 56:14206-14213. [DOI: 10.1021/acs.inorgchem.7b02341] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Ivan Pietro Oliveri
- Dipartimento di Scienze Chimiche and ‡Dipartimento di Scienze del Farmaco, Università di Catania, I-95125 Catania, Italy
| | - Giuseppe Forte
- Dipartimento di Scienze Chimiche and ‡Dipartimento di Scienze del Farmaco, Università di Catania, I-95125 Catania, Italy
| | - Giuseppe Consiglio
- Dipartimento di Scienze Chimiche and ‡Dipartimento di Scienze del Farmaco, Università di Catania, I-95125 Catania, Italy
| | - Salvatore Failla
- Dipartimento di Scienze Chimiche and ‡Dipartimento di Scienze del Farmaco, Università di Catania, I-95125 Catania, Italy
| | - Santo Di Bella
- Dipartimento di Scienze Chimiche and ‡Dipartimento di Scienze del Farmaco, Università di Catania, I-95125 Catania, Italy
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14
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Chakraborty S, Mondal P, Krishna Prasad S, Shankar Rao D, Bhattacharjee CR. Zinc(II)-salphen complexes bearing long alkoxy side arms: Synthesis, solvent dependent aggregation, and spacer group substituent effect on mesomorphism and photophysical property. J Mol Liq 2017. [DOI: 10.1016/j.molliq.2017.09.078] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
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15
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Kai S, Sakuma Y, Mashiko T, Kojima T, Tachikawa M, Hiraoka S. The Effect of Solvent and Coordination Environment of Metal Source on the Self-Assembly Pathway of a Pd(II)-Mediated Coordination Capsule. Inorg Chem 2017; 56:12652-12663. [PMID: 28945075 DOI: 10.1021/acs.inorgchem.7b02152] [Citation(s) in RCA: 28] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
Abstract
The effect of reaction environment on the self-assembly process of an octahedron-shaped Pd6L8 capsule was investigated. Quantitative analysis of self-assembly process with 1H NMR spectroscopy revealed that the self-assembly pathway of the capsule was altered by solvent and a leaving ligand coordinating to the metal source, which are not the components of the final self-assembly. Solvents definitively determine the pathway of the self-assembly at a very early stage of the self-assembly. Contrary to the expectation that the weaker the coordination ability of the leaving ligand is, the faster the formation of the final assembly becomes, a leaving ligand with weak coordination ability tends to generate a kinetically trapped species to prevent the capsule formation under mild conditions.
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Affiliation(s)
- Shumpei Kai
- Department of Basic Science, Graduate School of Arts and Sciences, The University of Tokyo 3-8-1 Komaba , Meguro-ku, Tokyo 153-8902, Japan
| | - Yui Sakuma
- Quantum Chemistry Division, Graduate School of Science, Yokohama City University 22-2 Seto , Kanazawa-ku, Yokohama, Kanagawa 236-0027, Japan
| | - Takako Mashiko
- Quantum Chemistry Division, Graduate School of Science, Yokohama City University 22-2 Seto , Kanazawa-ku, Yokohama, Kanagawa 236-0027, Japan
| | - Tatsuo Kojima
- Department of Basic Science, Graduate School of Arts and Sciences, The University of Tokyo 3-8-1 Komaba , Meguro-ku, Tokyo 153-8902, Japan
| | - Masanori Tachikawa
- Quantum Chemistry Division, Graduate School of Science, Yokohama City University 22-2 Seto , Kanazawa-ku, Yokohama, Kanagawa 236-0027, Japan
| | - Shuichi Hiraoka
- Department of Basic Science, Graduate School of Arts and Sciences, The University of Tokyo 3-8-1 Komaba , Meguro-ku, Tokyo 153-8902, Japan
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16
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Oliveri IP, Di Bella S. Lewis basicity of relevant monoanions in a non-protogenic organic solvent using a zinc(ii) Schiff-base complex as a reference Lewis acid. Dalton Trans 2017; 46:11608-11614. [PMID: 28825067 DOI: 10.1039/c7dt02821k] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
Abstract
The Lewis basicity of relevant anions is reported for the first time and compared with that of neutral bases.
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Affiliation(s)
| | - Santo Di Bella
- Dipartimento di Scienze Chimiche
- Università di Catania
- I-95125 Catania
- Italy
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17
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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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18
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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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19
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Piccinno M, Angulo-Pachón CA, Ballester P, Escuder B, Cort AD. Rational design of a supramolecular gel based on a Zn(ii)–salophen bis-dipeptide derivative. RSC Adv 2016. [DOI: 10.1039/c6ra12731b] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023] Open
Abstract
We report the rational design and synthesis of a supramolecular gelator based on a Zn(ii)–salophen derivative functionalized with l-valine residues.
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Affiliation(s)
- Martina Piccinno
- Dipartimento di Chimica and IMC-CNR
- Universitá“La Sapienza”
- 00185 Rome
- Italy
- Institute of Chemical Research of Catalonia (ICIQ)
| | | | - Pablo Ballester
- Institute of Chemical Research of Catalonia (ICIQ)
- The Barcelona Institute of Science and Technology
- 43007 Tarragona
- Spain
- Catalan Institution of Research and Advanced Studies (ICREA)
| | - Beatriu Escuder
- Departament de Química Inorgànica i Orgànica
- Universitat Jaume I
- 12071 Castelló
- Spain
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20
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Liu X, Novoa N, Manzur C, Carrillo D, Hamon JR. New organometallic Schiff-base copper complexes as efficient “click” reaction precatalysts. NEW J CHEM 2016. [DOI: 10.1039/c5nj02681d] [Citation(s) in RCA: 30] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023]
Abstract
In the presence of sodium ascorbate, recyclable CuAAC precatalysts displayed high activity allowing the synthesis of a wide variety of 1,4-disubstituted 1,2,3-triazoles in high isolated yields.
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Affiliation(s)
- Xiang Liu
- UMR 6226
- Institut des Sciences Chimiques de Rennes
- CNRS-Université de Rennes 1
- 35042 Rennes Cedex
- France
| | - Néstor Novoa
- Laboratorio de Química Inorgánica
- Instituto de Química
- Pontificia Universidad Católica de Valparaíso
- Valparaíso
- Chile
| | - Carolina Manzur
- Laboratorio de Química Inorgánica
- Instituto de Química
- Pontificia Universidad Católica de Valparaíso
- Valparaíso
- Chile
| | - David Carrillo
- Laboratorio de Química Inorgánica
- Instituto de Química
- Pontificia Universidad Católica de Valparaíso
- Valparaíso
- Chile
| | - Jean-René Hamon
- UMR 6226
- Institut des Sciences Chimiques de Rennes
- CNRS-Université de Rennes 1
- 35042 Rennes Cedex
- France
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21
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Feng XZ, Han GC, Qin J, Yin SM, Chen Z. Determination of Residual Solvents in Linezolid by Static Headspace GC. J Chromatogr Sci 2015; 54:487-91. [PMID: 26657409 DOI: 10.1093/chromsci/bmv175] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/25/2015] [Indexed: 11/14/2022]
Abstract
A headspace gas chromatographic method was developed for the determination of residual solvents in linezolid active substances. The solvents include petroleum ether (60-90°C), acetone, tetrahydrofuran, ethyl acetate, methanol, dichloromethane (DCM) and pyridine. The method showed the possibility to detect the tested solvents with a linear determination correlation coefficient (r) greater than 0.9995 except for petroleum ether (0.9980). The limits of detection ranged between 0.12 μg/mL (petroleum ether) and 3.56 μg/mL (DCM), and the limits of quantity ranged between 0.41 μg/mL (petroleum ether) and 11.86 μg/mL (DCM). The method achieved good accuracy (recoveries ranging from 92.8 to 102.5%) and precision for both run-to-run and day-to-day assay (relative standard deviation ranging from 0.4 to 1.3%) for all seven solvents concerned, which were applied in the quality control of three batches of linezolid successfully.
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Affiliation(s)
- Xiao-Zhen Feng
- School of Life and Environmental Sciences, Guilin University of Electronic Technology, Jinji Road No.1, Guilin 541004, P. R. China
| | - Guo-Cheng Han
- School of Life and Environmental Sciences, Guilin University of Electronic Technology, Jinji Road No.1, Guilin 541004, P. R. China
| | - Jianhe Qin
- Guilin Pharmaceutical Company Limited, Guilin 541004, P. R. China
| | - Shi-Min Yin
- School of Life and Environmental Sciences, Guilin University of Electronic Technology, Jinji Road No.1, Guilin 541004, P. R. China
| | - Zhencheng Chen
- School of Life and Environmental Sciences, Guilin University of Electronic Technology, Jinji Road No.1, Guilin 541004, P. R. China
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22
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Synthesis, spectral, electrochemical, crystal structures and nonlinear optical properties of unsymmetrical Ni(II) and Cu(II) Schiff base complexes. Inorganica Chim Acta 2015. [DOI: 10.1016/j.ica.2015.02.030] [Citation(s) in RCA: 44] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
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23
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Tang J, Cai YB, Jing J, Zhang JL. Unravelling the correlation between metal induced aggregation and cellular uptake/subcellular localization of Znsalen: an overlooked rule for design of luminescent metal probes. Chem Sci 2015; 6:2389-2397. [PMID: 28706655 PMCID: PMC5488197 DOI: 10.1039/c4sc03824j] [Citation(s) in RCA: 50] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/10/2014] [Accepted: 01/21/2015] [Indexed: 01/08/2023] Open
Abstract
Unravelling the unique effects of metal coordination on biological behaviours is of importance to design metal based therapeutic and diagnostic agents. In this work, we chose luminescent Znsalen (ZnL1 ) as a case study to demonstrate that metal induced aggregation arising from the intermolecular Zn···O interaction influences its cellular uptake and subcellular localization. Comparative studies with the free bases (L1 and L2 ) show that ZnL1 undergoes cellular uptake through caveolae-mediated endocytosis and internalizes in endosomal/lysosomal compartments, in contrast to the localization of L1 and L2 in the mitochondria. Further studies of photophysical properties, TEM imaging and DLS analysis suggest that ZnL1 tends to form large sized fibrous structures in aqueous media. To investigate the relationship between ZnL1 aggregation and the biological behaviour, we used pyridine to tune the "aggregation-to-deaggregation" transition and found that, in the presence of pyridine, ZnL1 could localize in the mitochondria and internalize into cells through the passive diffusion pathway. Such distinctive biological behaviours resulting from the different Znsalen species clearly point out the importance of metal induced aggregation or metal speciation analysis in designing metal complexes as biological probes.
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Affiliation(s)
- Juan Tang
- Beijing National Laboratory for Molecular Sciences , State Key Laboratory of Rare Earth Materials Chemistry and Applications , College of Chemistry and Molecular Engineering , Peking University , Beijing 100871 , P. R. China .
| | - Yuan-Bo Cai
- Beijing National Laboratory for Molecular Sciences , State Key Laboratory of Rare Earth Materials Chemistry and Applications , College of Chemistry and Molecular Engineering , Peking University , Beijing 100871 , P. R. China .
| | - Jing Jing
- School of Chemistry , Beijing Institute of Technology , Beijing 100081 , P. R. China
| | - Jun-Long Zhang
- Beijing National Laboratory for Molecular Sciences , State Key Laboratory of Rare Earth Materials Chemistry and Applications , College of Chemistry and Molecular Engineering , Peking University , Beijing 100871 , P. R. China .
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24
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Consiglio G, Oliveri IP, Punzo F, Thompson AL, Di Bella S, Failla S. Structure and aggregation properties of a Schiff-base zinc(ii) complex derived from cis-1,2-diaminocyclohexane. Dalton Trans 2015; 44:13040-8. [PMID: 26103462 DOI: 10.1039/c5dt01148e] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/03/2023]
Abstract
The effect of the bridging diamine upon the aggregation properties of a ZnII Schiff-base complex is reported. The X-ray crystal structure indicates the presence of an asymmetric dimer which is preserved even in solution.
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Affiliation(s)
- Giuseppe Consiglio
- Dipartimento di Ingegneria Industriale
- Università di Catania
- I-95125 Catania
- Italy
| | | | - Francesco Punzo
- Dipartimento di Scienze del Farmaco
- Sezione Chimica
- Università di Catania
- I-95125 Catania
- Italy
| | - Amber L. Thompson
- Chemical Crystallography
- Department of Chemistry
- University of Oxford
- Oxford OX1 3TA
- UK
| | - Santo Di Bella
- Dipartimento di Scienze Chimiche
- Università di Catania
- I-95125 Catania
- Italy
| | - Salvatore Failla
- Dipartimento di Ingegneria Industriale
- Università di Catania
- I-95125 Catania
- Italy
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25
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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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