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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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Chan CWT, Chan K, Yam VWW. Induced Self-Assembly and Disassembly of Alkynylplatinum(II) 2,6-Bis(benzimidazol-2'-yl)pyridine Complexes with Charge Reversal Properties: "Proof-of-Principle" Demonstration of Ratiometric Förster Resonance Energy Transfer Sensing of pH. ACS APPLIED MATERIALS & INTERFACES 2023; 15:25122-25133. [PMID: 35766435 DOI: 10.1021/acsami.2c05677] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/02/2023]
Abstract
A series of pH-responsive alkynylplatinum(II) 2,6-bis(benzimidazol-2'-yl)pyridine (bzimpy) complexes with charge-reversal properties was synthesized, and the supramolecular assemblies between conjugated polyelectrolyte, PFP-OSO3-, and [Pt{bzimpy(TEG)2}{C≡C-C6H3-(COOH)2-3,5}]Cl (1) have been studied using UV-vis absorption, emission, and resonance light scattering (RLS) spectroscopy. An efficient Förster resonance energy transfer (FRET) from PFP-OSO3- donor to the aggregated 1 as acceptor with the aid of Pt(II)···Pt(II) interactions has been presented, which leads to a growth of triplet metal-metal-to-ligand charge transfer (3MMLCT) emission in the low-energy red region. The two-component PFP-OSO3--1 ensemble was then exploited as a "proof-of-principle" concept strategy for pH sensing by tracking the ratiometric emission changes. With the aid of judicious molecular design on the pH-driven charge-reversal property, the polyelectrolyte-induced self-assembly and the FRET from PFP-OSO3- to the platinum(II) aggregates have been modulated. Together with its excellent reversibility and photostability, the extra stability provided by the Pt(II)···Pt(II) and π-π stacking interactions on top of the electrostatic and hydrophobic interactions existing in polyelectrolye-complex assemblies has led to a selective and sensitive pH sensing assay.
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Affiliation(s)
- Calford Wai-Ting Chan
- Institute of Molecular Functional Materials and Department of Chemistry, The University of Hong Kong, Pokfulam Road, Hong Kong, People's Republic of China
| | - Kevin Chan
- Institute of Molecular Functional Materials and Department of Chemistry, The University of Hong Kong, Pokfulam Road, Hong Kong, People's Republic of China
| | - Vivian Wing-Wah Yam
- Institute of Molecular Functional Materials and Department of Chemistry, The University of Hong Kong, Pokfulam Road, Hong Kong, People's Republic of China
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3
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Yeung JY, Kong FK, Hau FK, Chan MH, Ng M, Leung M, Yam VW. Solvent‐Dependent Supramolecular Host–Guest Assemblies of Platinum(II) Tweezers and a Guest System: From Discrete Molecules to High‐Ordered Oligomers. Angew Chem Int Ed Engl 2022; 61:e202207313. [DOI: 10.1002/anie.202207313] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/18/2022] [Indexed: 11/09/2022]
Affiliation(s)
- Jenny Yuk‐Wa Yeung
- Institute of Molecular Functional Materials Department of Chemistry The University of Hong Kong Pokfulam Road Hong Kong P. R. China
| | - Fred Ka‐Wai Kong
- Institute of Molecular Functional Materials Department of Chemistry The University of Hong Kong Pokfulam Road Hong Kong P. R. China
| | - Franky Ka‐Wah Hau
- Institute of Molecular Functional Materials Department of Chemistry The University of Hong Kong Pokfulam Road Hong Kong P. R. China
| | - Michael Ho‐Yeung Chan
- Institute of Molecular Functional Materials Department of Chemistry The University of Hong Kong Pokfulam Road Hong Kong P. R. China
| | - Maggie Ng
- Institute of Molecular Functional Materials Department of Chemistry The University of Hong Kong Pokfulam Road Hong Kong P. R. China
| | - Ming‐Yi Leung
- Institute of Molecular Functional Materials Department of Chemistry The University of Hong Kong Pokfulam Road Hong Kong P. R. China
| | - Vivian Wing‐Wah Yam
- Institute of Molecular Functional Materials Department of Chemistry The University of Hong Kong Pokfulam Road Hong Kong P. R. China
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Yeung JYW, Kong FKW, Hau FKW, Chan MHY, Ng M, Leung MY, Yam VWW. Solvent‐Dependent Supramolecular Host‐Guest Assemblies of Platinum(II) Tweezers and a Guest System: From Discrete Molecules to High‐Ordered Oligomers. Angew Chem Int Ed Engl 2022. [DOI: 10.1002/ange.202207313] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
| | | | | | | | - Maggie Ng
- The University of Hong Kong Chemistry CHINA
| | | | - Vivian W. W. Yam
- The University of Hong Kong Department of Chemistry Pokfulam RoadChong Yuet Ming Chemistry Building --- Hong Kong CHINA
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Zheng Q, Borsley S, Tu T, Cockroft SL. Reversible stimuli-responsive chromism of a cyclometallated platinum(II) complex. Chem Commun (Camb) 2020; 56:14705-14708. [PMID: 33170199 DOI: 10.1039/d0cc06775j] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Abstract
We report the reversible chromism and luminescence of a cyclometalated platinum(ii) complex that forms dimers, with close PtPt interactions that can be modulated by solvent and temperature. The precise reversible control may be exploited in future stimuli-responsive chemosensing or optoelectronic devices.
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Affiliation(s)
- Qingshu Zheng
- EaStCHEM School of Chemistry, University of Edinburgh, Joseph Black Building, David Brewster Road, Edinburgh EH9 3FJ, UK. and Shanghai Key Laboratory of Molecular Catalysis and Innovative Materials, Department of Chemistry, Fudan University, 2005 Songhu Road, Shanghai 200438, China
| | - Stefan Borsley
- EaStCHEM School of Chemistry, University of Edinburgh, Joseph Black Building, David Brewster Road, Edinburgh EH9 3FJ, UK.
| | - Tao Tu
- Shanghai Key Laboratory of Molecular Catalysis and Innovative Materials, Department of Chemistry, Fudan University, 2005 Songhu Road, Shanghai 200438, China
| | - Scott L Cockroft
- EaStCHEM School of Chemistry, University of Edinburgh, Joseph Black Building, David Brewster Road, Edinburgh EH9 3FJ, UK.
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Chen Z, Chan MHY, Yam VWW. Stimuli-Responsive Two-Dimensional Supramolecular Polymers Based on Trinuclear Platinum(II) Scaffolds: Reversible Modulation of Photoluminescence, Cavity Size, and Water Permeability. J Am Chem Soc 2020; 142:16471-16478. [PMID: 32909749 DOI: 10.1021/jacs.0c07969] [Citation(s) in RCA: 25] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Here we report the first two-dimensional (2D) supramolecular polymer, which has varying structure and function arising from the perturbation of noncovalent metal···metal interactions in response to acid-base stimuli. This 2D assembly possesses a positively charged, honeycomb-like nanostructure consisting of trinuclear alkynylplatinum(II) terpyridine complexes appended with acid-sensitive dimethylamino groups. Upon addition of acids and bases, reversible switching mediated by protonation and deprotonation of dimethylamino and dimethylammonium moieties intrinsically alters the positive charge density of the constituent cationic units, which causes interior cavities to adaptively adjust their size, accompanied by drastic photoluminescence changes. When water molecules pass through the membranes obtained from 2D supramolecular polymers, the permeating flux can also be tuned by the pH values of the buffer media. This work paves the way toward supramolecularly engineered 2D smart materials with stimuli-responsive properties.
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Affiliation(s)
- Zhen Chen
- Institute of Molecular Functional Materials and Department of Chemistry, The University of Hong Kong, Pokfulam Road, Hong Kong, People's Republic of China
| | - Michael Ho-Yeung Chan
- Institute of Molecular Functional Materials and Department of Chemistry, The University of Hong Kong, Pokfulam Road, Hong Kong, People's Republic of China
| | - Vivian Wing-Wah Yam
- Institute of Molecular Functional Materials and Department of Chemistry, The University of Hong Kong, Pokfulam Road, Hong Kong, People's Republic of China
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Han Y, Gao Z, Wang C, Zhong R, Wang F. Recent progress on supramolecular assembly of organoplatinum(II) complexes into long-range ordered nanostructures. Coord Chem Rev 2020. [DOI: 10.1016/j.ccr.2020.213300] [Citation(s) in RCA: 40] [Impact Index Per Article: 10.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
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Abstract
Manipulation of non-covalent metal–metal interactions allows the fabrication of functional metallosupramolecular structures with diverse supramolecular behaviors. The majority of reported studies are mostly designed and governed by thermodynamics, with very few examples of metallosupramolecular systems exhibiting intriguing kinetics. Here we report a serendipitous finding of platinum(ii) complexes serving as non-covalent crosslinkers for the fabrication of supramolecular DNA hydrogels. Upon mixing the alkynylplatinum(ii) terpyridine complex with double-stranded DNA in aqueous solution, the platinum(ii) complex molecules are found to first stack into columnar phases by metal–metal and π–π interactions, and then the columnar phases that carry multiple positive charges crosslink the negatively charged DNA strands to form supramolecular hydrogels with luminescence properties and excellent processability. Subsequent platinum(ii) intercalation into DNA competes with the metal–metal and π–π interactions at the crosslinking points, switching on the spontaneous gel-to-sol transition. In the case of a chloro (2,6-bis(benzimidazol-2′-yl)pyridine)platinum(ii) complex, with [Pt(bzimpy)Cl]+ serving as a non-covalent crosslinker where the metal–metal and π–π interactions outcompete platinum(ii) intercalation, the intercalation-driven gel-to-sol transition pathway is blocked since the gel state is energetically more favorable than the sol state. Interestingly, the ligand exchange reaction of the chloro ligand in [Pt(bzimpy)Cl]+ with glutathione (GSH) has endowed the complexes with enhanced hydrophilicity, decreasing the planarity of the complexes, and turning off the metal–metal and π–π interactions at the crosslinking points, leading to GSH-triggered hydrogel dissociation. We report a serendipitous finding of platinum(ii) complexes serving as non-covalent crosslinkers for the fabrication of supramolecular DNA hydrogels.![]()
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Affiliation(s)
- Kaka Zhang
- Institute of Molecular Functional Materials, Department of Chemistry, The University of Hong Kong Pokfulam Road Hong Kong PR China
| | - Vivian Wing-Wah Yam
- Institute of Molecular Functional Materials, Department of Chemistry, The University of Hong Kong Pokfulam Road Hong Kong PR China
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Zhang K, Yeung MCL, Leung SYL, Yam VWW. Platinum(II) Probes for Sensing Polyelectrolyte Lengths and Architectures. ACS APPLIED MATERIALS & INTERFACES 2020; 12:8503-8512. [PMID: 32027479 DOI: 10.1021/acsami.9b17611] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/10/2023]
Abstract
Platinum(II) polypyridine complexes of a square-planar geometry have been used as spectroscopic reporters for quantification of various charged species through non-covalent metal-metal interactions. The characterization of molecular weights and architectures of polyelectrolytes represents a challenging task in polymer science. Here, we report the utilization of platinum(II) complex probes and non-covalent metal-metal interactions for sensing polyelectrolyte lengths and architectures. It is found that the platinum(II) probes can bind to linear polyelectrolytes via electrostatic attractions and give rise to significant spectroscopic changes associated with the formation of metal-metal interactions, and the extent of the spectroscopic changes is found to increase with the lengths of the linear polyelectrolytes. Besides, the platinum(II) probes have been found to co-assemble with the linear polyelectrolytes to form well-defined nanofibers, and the lengths of the linear polyelectrolytes can be directly estimated from the diameter of the nanofibers under transmission electron microscopy observation. Interestingly, upon mixing with the platinum(II) probes, polyelectrolytes with bottlebrush architectures have been found to exhibit larger spectroscopic changes than linear polyelectrolytes with the same chemical composition. Combined with the reported theoretical studies on counterion condensation of polyelectrolytes, the platinum(II) complexes are found to function as spectroscopic probes for sensing the charge densities of the polyelectrolytes with different lengths and diverse architectures. Moreover, platinum(II) probes pre-organized in nanostructured aggregates have been found to intercalate into double-stranded DNA, which are naturally occurring biological polyelectrolytes with helical architectures and intercalation sites, to give significant enhancement of spectroscopic changes when compared to the intercalation of monomeric platinum(II) probes into double-stranded DNA.
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Affiliation(s)
- Kaka Zhang
- Institute of Molecular Functional Materials and Department of Chemistry , The University of Hong Kong , Pokfulam Road , Hong Kong , PR China
| | - Margaret Ching-Lam Yeung
- Institute of Molecular Functional Materials and Department of Chemistry , The University of Hong Kong , Pokfulam Road , Hong Kong , PR China
| | - Sammual Yu-Lut Leung
- Institute of Molecular Functional Materials and Department of Chemistry , The University of Hong Kong , Pokfulam Road , Hong Kong , PR China
| | - Vivian Wing-Wah Yam
- Institute of Molecular Functional Materials and Department of Chemistry , The University of Hong Kong , Pokfulam Road , Hong Kong , PR China
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11
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Chan MHY, Leung SYL, Yam VWW. Rational Design of Multi-Stimuli-Responsive Scaffolds: Synthesis of Luminescent Oligo(ethynylpyridine)-Containing Alkynylplatinum(II) Polypyridine Foldamers Stabilized by Pt···Pt Interactions. J Am Chem Soc 2019; 141:12312-12321. [DOI: 10.1021/jacs.9b04447] [Citation(s) in RCA: 35] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/05/2023]
Affiliation(s)
- Michael Ho-Yeung Chan
- Institute of Molecular Functional Materials (Areas of Excellence Scheme, University Grants Committee (Hong Kong)) and Department of Chemistry, The University of Hong Kong, Pokfulam Road, Hong Kong, People’s Republic of China
| | - Sammual Yu-Lut Leung
- Institute of Molecular Functional Materials (Areas of Excellence Scheme, University Grants Committee (Hong Kong)) and Department of Chemistry, The University of Hong Kong, Pokfulam Road, Hong Kong, People’s Republic of China
| | - Vivian Wing-Wah Yam
- Institute of Molecular Functional Materials (Areas of Excellence Scheme, University Grants Committee (Hong Kong)) and Department of Chemistry, The University of Hong Kong, Pokfulam Road, Hong Kong, People’s Republic of China
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12
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Zhang Q, Wang Q, Chen XX, Zhang P, Ding CF, Li Z, Jiang YB. Developing the spectral sensing scheme with in situ generated chromophores. Trends Analyt Chem 2018. [DOI: 10.1016/j.trac.2018.09.020] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
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13
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Fang S, Leung SYL, Li Y, Yam VWW. Directional Self-Assembly and Photoinduced Polymerization of Diacetylene-Containing Platinum(II) Terpyridine Complexes. Chemistry 2018; 24:15596-15602. [PMID: 30221406 DOI: 10.1002/chem.201802592] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/23/2018] [Revised: 07/23/2018] [Indexed: 11/07/2022]
Abstract
A series of newly designed and synthesized diacetylene-containing platinum(II) terpyridine complexes exhibited intriguing self-assembly properties. Facilitated by Pt⋅⋅⋅Pt, π-π stacking, hydrogen-bonding and hydrophobic-hydrophobic interactions, these complexes are preorganized to readily undergo topochemical polymerization reactions upon photoirradiation. The in situ polymerization of the diacetylene units to form polydiacetylene, indicated by the UV/Vis spectral changes, gel permeation chromatography and dynamic light scattering, was found to alter their assembly behaviours, as revealed by TEM images.
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Affiliation(s)
- Shishi Fang
- Institute of Molecular Functional Materials, Areas of Excellence Scheme, University Grant Committee (Hong Kong), and Department of Chemistry, The University of Hong Kong, Pokfulam Road, Hong Kong, P. R. China
| | - Sammual Yu-Lut Leung
- Institute of Molecular Functional Materials, Areas of Excellence Scheme, University Grant Committee (Hong Kong), and Department of Chemistry, The University of Hong Kong, Pokfulam Road, Hong Kong, P. R. China
| | - Yongguang Li
- Institute of Molecular Functional Materials, Areas of Excellence Scheme, University Grant Committee (Hong Kong), and Department of Chemistry, The University of Hong Kong, Pokfulam Road, Hong Kong, P. R. China.,Lehn Institute of Functional Materials, School of Chemistry, Sun Yat-Sen University, Guangzhou, 510275, P. R. China
| | - Vivian Wing-Wah Yam
- Institute of Molecular Functional Materials, Areas of Excellence Scheme, University Grant Committee (Hong Kong), and Department of Chemistry, The University of Hong Kong, Pokfulam Road, Hong Kong, P. R. China.,Lehn Institute of Functional Materials, School of Chemistry, Sun Yat-Sen University, Guangzhou, 510275, P. R. China
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Li X, Poon CT, Hong EYH, Wong HL, Chan AKW, Wu L, Yam VWW. Multi-modulation for self-assemblies of amphiphilic rigid-soft compounds through alteration of solution polarity and temperature. SOFT MATTER 2017; 13:8408-8418. [PMID: 29077127 DOI: 10.1039/c7sm01754e] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Abstract
A new class of small molecule-based amphiphilic carbazole-containing compounds has been designed and synthesized. Detailed analysis of the temperature- and solvent-dependent UV-vis absorption spectra has provided insights into the cooperative self-assembly mechanism of the carbazole-containing compounds. Interestingly, the prepared amphiphilic rigid-soft compounds were also found to display a lower critical solution temperature (LCST) behavior in aqueous solution, which is relatively less explored in small molecule-based materials, leading to promising candidates for the design of a new class of thermo-responsive materials.
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Affiliation(s)
- Xiaoying Li
- State Key Laboratory of Supramolecular Structure and Materials and College of Chemistry, Jilin University, Changchun 130012, P. R. China.
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15
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Siu SKL, Chung CYS, Yam VWW. Amphiphilic oligo(ethylene glycol)- and poly(ethyleneoxide)-block-poly(propylene oxide)-block-poly-(ethylene oxide)-containing cyclometalated alkynylgold(III) complexes: From basic photophysics to self-assembly and stimuli-responsive properties. J Organomet Chem 2017. [DOI: 10.1016/j.jorganchem.2017.04.035] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
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16
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Zhang K, Yeung MCL, Leung SYL, Yam VWW. Manipulation of Nanostructures in the Co-assembly of Platinum(II) Complexes and Block Copolymers. Chem 2017. [DOI: 10.1016/j.chempr.2017.04.017] [Citation(s) in RCA: 32] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/19/2023]
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17
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Cheng HK, Chung CYS, Zhang K, Yam VWW. Simple and Versatile Preparation of Luminescent Amphiphilic Platinum(II)-containing Polystyrene Complexes With Transformable Nanostructures Assisted by Pt⋅⋅⋅Pt and π-π Interactions. Chem Asian J 2017; 12:1509-1516. [DOI: 10.1002/asia.201700123] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/26/2017] [Revised: 02/28/2017] [Indexed: 11/07/2022]
Affiliation(s)
- Heung-Kiu Cheng
- Institute of Molecular Functional Materials (Areas of Excellence Scheme, University Grants Committee (Hong Kong)) and Department of Chemistry; The University of Hong Kong; Pokfulam Road Hong Kong
| | - Clive Yik-Sham Chung
- Institute of Molecular Functional Materials (Areas of Excellence Scheme, University Grants Committee (Hong Kong)) and Department of Chemistry; The University of Hong Kong; Pokfulam Road Hong Kong
| | - Kaka Zhang
- Institute of Molecular Functional Materials (Areas of Excellence Scheme, University Grants Committee (Hong Kong)) and Department of Chemistry; The University of Hong Kong; Pokfulam Road Hong Kong
| | - Vivian Wing-Wah Yam
- Institute of Molecular Functional Materials (Areas of Excellence Scheme, University Grants Committee (Hong Kong)) and Department of Chemistry; The University of Hong Kong; Pokfulam Road Hong Kong
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Gong ZL, Zhong YW. H2PO4–- and Solvent-Induced Polymorphism of an Amide-Functionalized [Pt(N^C^N)Cl] Complex. Inorg Chem 2016; 55:10143-10151. [DOI: 10.1021/acs.inorgchem.6b01059] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Affiliation(s)
- Zhong-Liang Gong
- Beijing National Laboratory for Molecular Sciences, CAS
Key Laboratory of Photochemistry, Institute of Chemistry, Chinese Academy of Science, 2 Bei Yi Jie, Zhong Guan Cun, Haidian District, Beijing 100190, China
| | - Yu-Wu Zhong
- Beijing National Laboratory for Molecular Sciences, CAS
Key Laboratory of Photochemistry, Institute of Chemistry, Chinese Academy of Science, 2 Bei Yi Jie, Zhong Guan Cun, Haidian District, Beijing 100190, China
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Zhou H, Liang F, Li J, Ding X, Ma A, Chen W, Luo C, Zhang G, Tian W, Cheng M, Liao B. RAFT polymerization and dually responsive behaviors of terpyridine-containing PNIPAAm copolymers in dilute solutions. REACT FUNCT POLYM 2016. [DOI: 10.1016/j.reactfunctpolym.2016.07.013] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/01/2022]
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20
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Fu TF, Ao L, Gao ZC, Zhang XL, Wang F. Advances on supramolecular assembly of cyclometalated platinum(II) complexes. CHINESE CHEM LETT 2016. [DOI: 10.1016/j.cclet.2016.06.054] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
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21
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Fu HLK, Po C, He H, Leung SYL, Wong KS, Yam VWW. Tuning of Supramolecular Architectures of l
-Valine-Containing Dicyanoplatinum(II) 2,2′-Bipyridine Complexes by Metal-Metal, π-π Stacking, and Hydrogen-Bonding Interactions. Chemistry 2016; 22:11826-36. [DOI: 10.1002/chem.201601983] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/28/2016] [Indexed: 01/31/2023]
Affiliation(s)
- Heidi Li-Ki Fu
- Institute of Molecular Functional Materials (Areas of Excellence Scheme; University Grants Committee (Hong Kong)) and Department of Chemistry; The University of Hong Kong; Pokfulam Road Hong Kong
| | - Charlotte Po
- Institute of Molecular Functional Materials (Areas of Excellence Scheme; University Grants Committee (Hong Kong)) and Department of Chemistry; The University of Hong Kong; Pokfulam Road Hong Kong
| | - Hexiang He
- Department of Physics; Hong Kong University of Science of Technology, Clear Water Bay; Kowloon Hong Kong
| | - Sammual Yu-Lut Leung
- Institute of Molecular Functional Materials (Areas of Excellence Scheme; University Grants Committee (Hong Kong)) and Department of Chemistry; The University of Hong Kong; Pokfulam Road Hong Kong
| | - Kam Sing Wong
- Department of Physics; Hong Kong University of Science of Technology, Clear Water Bay; Kowloon Hong Kong
| | - Vivian Wing-Wah Yam
- Institute of Molecular Functional Materials (Areas of Excellence Scheme; University Grants Committee (Hong Kong)) and Department of Chemistry; The University of Hong Kong; Pokfulam Road Hong Kong
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Gao Z, Han Y, Chen J, Wang X, Wang F. Trimethylammonium-Derived Molecular Tweezers and Their Host-Guest Complexation Behaviours in Polar Media. Chem Asian J 2016; 11:1775-9. [DOI: 10.1002/asia.201600364] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/19/2016] [Revised: 04/11/2016] [Indexed: 12/21/2022]
Affiliation(s)
- Zhao Gao
- CAS Key Laboratory of Soft Matter Chemistry; iChEM(Collaborative Innovation Center of Chemistry for Energy Materials); Department of Polymer Science and Engineering; University of Science and Technology of China; Hefei Anhui 230026 P. R. China
| | - Yifei Han
- CAS Key Laboratory of Soft Matter Chemistry; iChEM(Collaborative Innovation Center of Chemistry for Energy Materials); Department of Polymer Science and Engineering; University of Science and Technology of China; Hefei Anhui 230026 P. R. China
| | - Jiangjun Chen
- CAS Key Laboratory of Soft Matter Chemistry; iChEM(Collaborative Innovation Center of Chemistry for Energy Materials); Department of Polymer Science and Engineering; University of Science and Technology of China; Hefei Anhui 230026 P. R. China
| | - Xiao Wang
- CAS Key Laboratory of Soft Matter Chemistry; iChEM(Collaborative Innovation Center of Chemistry for Energy Materials); Department of Polymer Science and Engineering; University of Science and Technology of China; Hefei Anhui 230026 P. R. China
| | - Feng Wang
- CAS Key Laboratory of Soft Matter Chemistry; iChEM(Collaborative Innovation Center of Chemistry for Energy Materials); Department of Polymer Science and Engineering; University of Science and Technology of China; Hefei Anhui 230026 P. R. China
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23
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Chung CYS, Li SPY, Lo KKW, Yam VWW. Synthesis and Electrochemical, Photophysical, and Self-Assembly Studies on Water-Soluble pH-Responsive Alkynylplatinum(II) Terpyridine Complexes. Inorg Chem 2016; 55:4650-63. [DOI: 10.1021/acs.inorgchem.6b00513] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/24/2023]
Affiliation(s)
- Clive Yik-Sham Chung
- Institute of Molecular
Functional Materials [Areas of Excellence Scheme, University Grants
Committee (Hong Kong)] and Department of Chemistry, The University of Hong Kong, Pokfulam Road, Hong Kong, P. R. China
| | - Steve Po-Yam Li
- Department of Biology and Chemistry, City University of Hong Kong, Tat Chee Avenue, Kowloon,
Hong Kong, P. R. China
| | - Kenneth Kam-Wing Lo
- Department of Biology and Chemistry, City University of Hong Kong, Tat Chee Avenue, Kowloon,
Hong Kong, P. R. China
| | - Vivian Wing-Wah Yam
- Institute of Molecular
Functional Materials [Areas of Excellence Scheme, University Grants
Committee (Hong Kong)] and Department of Chemistry, The University of Hong Kong, Pokfulam Road, Hong Kong, P. R. China
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24
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Chan K, Yik-Sham Chung C, Wing-Wah Yam V. Parallel folding topology-selective label-free detection and monitoring of conformational and topological changes of different G-quadruplex DNAs by emission spectral changes via FRET of mPPE-Ala-Pt(ii) complex ensemble. Chem Sci 2016; 7:2842-2855. [PMID: 30090278 PMCID: PMC6055111 DOI: 10.1039/c5sc04563k] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/27/2015] [Accepted: 01/05/2016] [Indexed: 12/28/2022] Open
Abstract
The formation of supramolecular assemblies between [Pt(bzimpy-Et){C[triple bond, length as m-dash]CC6H4(CH2NMe3-4)}]Cl2 (1) and mPPE-Ala and the FRET properties of the ensemble have been revealed from the UV-vis absorption, steady-state emission and time-resolved emission decay studies. The two-component mPPE-Ala-1 ensemble has been employed in a "proof-of-principle" concept for label-free detection of G-quadruplex DNAs with the intramolecular propeller parallel folding topology, such as c-myc, in aqueous buffer solution. By the modulation of the aggregation/deaggregation of the polymer-metal complex aggregates and hence the FRET from the mPPE-Ala donor to the aggregated 1 as acceptor, the ensemble has been demonstrated for sensitive and selective label-free detection of c-myc via the monitoring of emission spectral changes of the ensemble. Ratiometric emission of the ensemble at 461 and 662 nm has been shown to distinguish the intramolecular propeller parallel G-quadruplex folding topology of c-myc from other G-quadruplex-forming sequences of different folding topologies, owing to the strong and specific interactions between c-myc and 1 as suggested by the UV-vis absorption and UV melting studies. In addition, the formation of high-order intermolecular multimeric G-quadruplexes from c-myc under molecular crowding conditions has been successfully probed by the ratiometric emission of the ensemble. The conformational and topological transition of human telomeric DNA from the mixed-hybrid form to the intramolecular propeller parallel form, as observed from the circular dichroism spectroscopy, has also been monitored by the ratiometric emission of the ensemble. The ability of the ensemble to detect these conformational and topological transitions of G-quadruplex DNAs has been rationalized by the excellent selectivity and sensitivity of the ensemble towards the intramolecular propeller parallel G-quadruplex DNAs and their high-order intermolecular multimers, which are due to the extra stabilization gained from Pt···Pt and π-π interactions in addition to the electrostatic and hydrophobic interactions found in the polymer-metal complex aggregates.
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Affiliation(s)
- Kevin Chan
- Institute of Molecular Functional Materials (Areas of Excellence Scheme, University Grants Committee (Hong Kong)) , Department of Chemistry , The University of Hong Kong , Pokfulam Road , Hong Kong , P. R. China .
| | - Clive Yik-Sham Chung
- Institute of Molecular Functional Materials (Areas of Excellence Scheme, University Grants Committee (Hong Kong)) , Department of Chemistry , The University of Hong Kong , Pokfulam Road , Hong Kong , P. R. China .
| | - Vivian Wing-Wah Yam
- Institute of Molecular Functional Materials (Areas of Excellence Scheme, University Grants Committee (Hong Kong)) , Department of Chemistry , The University of Hong Kong , Pokfulam Road , Hong Kong , P. R. China .
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25
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Chan K, Chung CY, Yam VW. Conjugated Polyelectrolyte‐Induced Self‐Assembly of Alkynylplatinum(II) 2,6‐Bis(benzimidazol‐2′‐yl)pyridine Complexes. Chemistry 2015; 21:16434-47. [DOI: 10.1002/chem.201501804] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/08/2015] [Indexed: 11/09/2022]
Affiliation(s)
- Kevin Chan
- Institute of Molecular Functional Materials (Areas of Excellence Scheme, University Grants Committee (Hong Kong)) and Department of Chemistry, The University of Hong Kong, Pokfulam Road, Hong Kong (P. R. China)
| | - Clive Yik‐Sham Chung
- Institute of Molecular Functional Materials (Areas of Excellence Scheme, University Grants Committee (Hong Kong)) and Department of Chemistry, The University of Hong Kong, Pokfulam Road, Hong Kong (P. R. China)
| | - Vivian Wing‐Wah Yam
- Institute of Molecular Functional Materials (Areas of Excellence Scheme, University Grants Committee (Hong Kong)) and Department of Chemistry, The University of Hong Kong, Pokfulam Road, Hong Kong (P. R. China)
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26
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Yam VWW, Au VKM, Leung SYL. Light-Emitting Self-Assembled Materials Based on d8 and d10 Transition Metal Complexes. Chem Rev 2015; 115:7589-728. [DOI: 10.1021/acs.chemrev.5b00074] [Citation(s) in RCA: 1065] [Impact Index Per Article: 118.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Vivian Wing-Wah Yam
- Institute of Molecular Functional
Materials (Areas of Excellence Scheme, University Grants Committee
(Hong Kong)) and Department of Chemistry, The University of Hong Kong, Pokfulam Road, Hong Kong, P. R. China
| | - Vonika Ka-Man Au
- Institute of Molecular Functional
Materials (Areas of Excellence Scheme, University Grants Committee
(Hong Kong)) and Department of Chemistry, The University of Hong Kong, Pokfulam Road, Hong Kong, P. R. China
| | - Sammual Yu-Lut Leung
- Institute of Molecular Functional
Materials (Areas of Excellence Scheme, University Grants Committee
(Hong Kong)) and Department of Chemistry, The University of Hong Kong, Pokfulam Road, Hong Kong, P. R. China
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27
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28
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Chung CYS, Tamaru SI, Shinkai S, Yam VWW. Supramolecular Assembly of Achiral Alkynylplatinum(II) Complexes and Carboxylic β-1,3-Glucan into Different Helical Handedness Stabilized by Pt⋅⋅⋅Pt and/or π-π Interactions. Chemistry 2015; 21:5447-58. [DOI: 10.1002/chem.201405035] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/28/2014] [Indexed: 12/19/2022]
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29
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Zhang Q, Vancoillie G, Mees MA, Hoogenboom R. Thermoresponsive polymeric temperature sensors with broad sensing regimes. Polym Chem 2015. [DOI: 10.1039/c4py01747a] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/20/2023]
Abstract
Polymeric temperature sensors with a broad sensing regime in aqueous solution have been developed.
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Affiliation(s)
- Qilu Zhang
- Supramolecular Chemistry Group
- Department of Organic and Macromolecular Chemistry
- Ghent University
- B-9000 Ghent
- Belgium
| | - Gertjan Vancoillie
- Supramolecular Chemistry Group
- Department of Organic and Macromolecular Chemistry
- Ghent University
- B-9000 Ghent
- Belgium
| | - Maarten A. Mees
- Supramolecular Chemistry Group
- Department of Organic and Macromolecular Chemistry
- Ghent University
- B-9000 Ghent
- Belgium
| | - Richard Hoogenboom
- Supramolecular Chemistry Group
- Department of Organic and Macromolecular Chemistry
- Ghent University
- B-9000 Ghent
- Belgium
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30
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Zhang ZH, Liu J, Wan LQ, Jiang FR, Lam CK, Ye BH, Qiao Z, Chao HY. Synthesis, characterization, photophysics, and anion binding properties of platinum(ii) acetylide complexes with urea group. Dalton Trans 2015; 44:7785-96. [DOI: 10.1039/c5dt00307e] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The relationship between the structure and anion-binding ability of platinum(ii) acetylide complexes with urea group has been studied.
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Affiliation(s)
- Zhi-Hui Zhang
- MOE Key Laboratory of Bioinorganic and Synthetic Chemistry
- School of Chemistry and Chemical Engineering
- Sun Yat-Sen University
- Guangzhou 510275
- China
| | - Jiewei Liu
- MOE Key Laboratory of Bioinorganic and Synthetic Chemistry
- School of Chemistry and Chemical Engineering
- Sun Yat-Sen University
- Guangzhou 510275
- China
| | - Li-Qi Wan
- MOE Key Laboratory of Bioinorganic and Synthetic Chemistry
- School of Chemistry and Chemical Engineering
- Sun Yat-Sen University
- Guangzhou 510275
- China
| | - Fang-Ru Jiang
- MOE Key Laboratory of Bioinorganic and Synthetic Chemistry
- School of Chemistry and Chemical Engineering
- Sun Yat-Sen University
- Guangzhou 510275
- China
| | - Chi-Keung Lam
- MOE Key Laboratory of Bioinorganic and Synthetic Chemistry
- School of Chemistry and Chemical Engineering
- Sun Yat-Sen University
- Guangzhou 510275
- China
| | - Bao-Hui Ye
- MOE Key Laboratory of Bioinorganic and Synthetic Chemistry
- School of Chemistry and Chemical Engineering
- Sun Yat-Sen University
- Guangzhou 510275
- China
| | - Zhengping Qiao
- MOE Key Laboratory of Bioinorganic and Synthetic Chemistry
- School of Chemistry and Chemical Engineering
- Sun Yat-Sen University
- Guangzhou 510275
- China
| | - Hsiu-Yi Chao
- MOE Key Laboratory of Bioinorganic and Synthetic Chemistry
- School of Chemistry and Chemical Engineering
- Sun Yat-Sen University
- Guangzhou 510275
- China
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31
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Aggregation-induced emission behavior of a pincer platinum(II) complex bearing a poly(ethylene oxide) chain in aqueous solution. J Organomet Chem 2014. [DOI: 10.1016/j.jorganchem.2014.08.030] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/06/2023]
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32
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Wong KMC, Chan MMY, Yam VWW. Supramolecular assembly of metal-ligand chromophores for sensing and phosphorescent OLED applications. ADVANCED MATERIALS (DEERFIELD BEACH, FLA.) 2014; 26:5558-68. [PMID: 24777887 DOI: 10.1002/adma.201306327] [Citation(s) in RCA: 84] [Impact Index Per Article: 8.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/31/2013] [Revised: 01/15/2014] [Indexed: 05/25/2023]
Abstract
The exploration of phosphorescent materials based on transition metal-ligand chromophoric complexes represents an important area of research in molecular materials. The knowledge and fundamental understanding of their photophysical properties offer a possible fine-tuning of their electronic absorption and luminescence properties. The strong propensity of d(8) transition metal compounds to form non-covalent metal···metal interactions facilitates supramolecular assembly and the formation of supramolecular nanostructures with interesting photophysical properties. The introduction of supramolecular assembly with hierarchical complexity involving non-covalent interactions could lead to research dimensions of unlimited possibilities and opportunities. This article briefly summarizes the latest progress on the use of d(8) metal-ligand chromophores as chemosensors, as exemplified by alkynylplatinum(II) complexes with emphasis on supramolecular assembly involving non-covalent interactions, and the recent advances in the utilization of d(8) metal-ligand phosphors, as exemplified by alkynylgold(III) system, for the exploration and development of phosphorescent OLEDs.
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Affiliation(s)
- Keith Man-Chung Wong
- Institute of Molecular Functional Materials (Areas of Excellence Scheme University Grants Committee) and Department of Chemistry, The University of Hong Kong, Pokfulam Road, Hong Kong, P. R. China
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33
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Amar A, Meghezzi H, Boixel J, Le Bozec H, Guerchais V, Jacquemin D, Boucekkine A. Aggregation Effect on the Luminescence Properties of Phenylbipyridine Pt(II) Acetylide Complexes. A Theoretical Prediction with Experimental Evidence. J Phys Chem A 2014; 118:6278-86. [DOI: 10.1021/jp505764k] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Affiliation(s)
- Anissa Amar
- UMR 6226 CNRS-Université de Rennes 1, Campus
de Beaulieu, Institut des Sciences Chimiques de Rennes, 35042 Rennes, France
- Laboratoire de Thermodynamique et Modélisation
Moléculaire, USTHB, BP 32 El Alia, 16111 Bab Ezzouar Alger, Algeria
| | - Hacène Meghezzi
- Laboratoire de Thermodynamique et Modélisation
Moléculaire, USTHB, BP 32 El Alia, 16111 Bab Ezzouar Alger, Algeria
| | - Julien Boixel
- UMR 6226 CNRS-Université de Rennes 1, Campus
de Beaulieu, Institut des Sciences Chimiques de Rennes, 35042 Rennes, France
| | - Hubert Le Bozec
- UMR 6226 CNRS-Université de Rennes 1, Campus
de Beaulieu, Institut des Sciences Chimiques de Rennes, 35042 Rennes, France
| | - Véronique Guerchais
- UMR 6226 CNRS-Université de Rennes 1, Campus
de Beaulieu, Institut des Sciences Chimiques de Rennes, 35042 Rennes, France
| | - Denis Jacquemin
- CEISAM, UMR CNRS 6230, Université de Nantes, 44322 Nantes cedex 3, France
- Institut Universitaire de France, IUF, 103, Bd St Michel, F-75005 Paris cedex 5, France
| | - Abdou Boucekkine
- UMR 6226 CNRS-Université de Rennes 1, Campus
de Beaulieu, Institut des Sciences Chimiques de Rennes, 35042 Rennes, France
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34
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Yim KC, Lam ESH, Wong KMC, Au VKM, Ko CC, Lam WH, Yam VWW. Synthesis, Characterization, Self-Assembly, Gelation, Morphology and Computational Studies of Alkynylgold(III) Complexes of 2,6-Bis(benzimidazol-2′-yl)pyridine Derivatives. Chemistry 2014; 20:9930-9. [DOI: 10.1002/chem.201402876] [Citation(s) in RCA: 29] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/31/2014] [Indexed: 12/16/2022]
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