1
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Chan MHY, Yam VWW. Toward the Design and Construction of Supramolecular Functional Molecular Materials Based on Metal–Metal Interactions. J Am Chem Soc 2022; 144:22805-22825. [DOI: 10.1021/jacs.2c08551] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Affiliation(s)
- Michael Ho-Yeung Chan
- Institute of Molecular Functional Materials, State Key Laboratory of Synthetic Chemistry 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, State Key Laboratory of Synthetic Chemistry and Department of Chemistry, The University of Hong Kong, Pokfulam Road, Hong Kong, People’s Republic of China
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2
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Li B, Wang Y, Chan MH, Pan M, Li Y, Yam VW. Supramolecular Assembly of Organoplatinum(II) Complexes for Subcellular Distribution and Cell Viability Monitoring with Differentiated Imaging. Angew Chem Int Ed Engl 2022; 61:e202210703. [DOI: 10.1002/anie.202210703] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/21/2022] [Indexed: 11/30/2022]
Affiliation(s)
- Baoning Li
- Lehn Institute of Functional Materials School of Chemistry Sun Yat-Sen University Guangzhou 510275 P. R. China
- State Key Laboratory of Synthetic Chemistry Institute of Molecular Functional Materials and Department of Chemistry The University of Hong Kong Pokfulam Road Hong Kong 999077 P. R. China
| | - Yaping Wang
- Lehn Institute of Functional Materials School of Chemistry Sun Yat-Sen University Guangzhou 510275 P. R. China
| | - Michael Ho‐Yeung Chan
- State Key Laboratory of Synthetic Chemistry Institute of Molecular Functional Materials and Department of Chemistry The University of Hong Kong Pokfulam Road Hong Kong 999077 P. R. China
| | - Mei Pan
- Lehn Institute of Functional Materials School of Chemistry Sun Yat-Sen University Guangzhou 510275 P. R. China
| | - Yonguang Li
- Lehn Institute of Functional Materials School of Chemistry Sun Yat-Sen University Guangzhou 510275 P. R. China
| | - Vivian Wing‐Wah Yam
- Lehn Institute of Functional Materials School of Chemistry Sun Yat-Sen University Guangzhou 510275 P. R. China
- State Key Laboratory of Synthetic Chemistry Institute of Molecular Functional Materials and Department of Chemistry The University of Hong Kong Pokfulam Road Hong Kong 999077 P. R. China
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Law ASY, Lee LCC, Lo KKW, Yam VWW. Aggregation and Supramolecular Self-Assembly of Low-Energy Red Luminescent Alkynylplatinum(II) Complexes for RNA Detection, Nucleolus Imaging, and RNA Synthesis Inhibitor Screening. J Am Chem Soc 2021; 143:5396-5405. [PMID: 33813827 DOI: 10.1021/jacs.0c13327] [Citation(s) in RCA: 47] [Impact Index Per Article: 15.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/04/2023]
Abstract
As an important nuclear substructure, the nucleolus has received increasing attention because of its significant functions in the transcription and processing of ribosomal RNA in eukaryotic cells. In this work, we introduce a proof-of-concept luminescence assay to detect RNA and to accomplish nucleolus imaging with the use of the supramolecular self-assembly of platinum(II) complexes. Noncovalent interactions between platinum(II) complexes and RNA can be induced by the introduction of a guanidinium group into the complexes, and accordingly, a high RNA affinity can be achieved. Interestingly, the aggregation affinities of platinum(II) complexes enable them to display remarkable luminescence turn-on upon RNA binding, which is a result of the strengthening of noncovalent Pt(II)···Pt(II) and π-π stacking interactions. The complexes exhibit not only intriguing spectroscopic changes and luminescence enhancement after RNA binding but also specific nucleolus imaging in cells. As compared to fluorescent dyes, the low-energy red luminescence and large Stokes shifts of platinum(II) complexes afford a high signal-to-background autofluorescence ratio in nucleolus imaging. Additional properties, including long phosphorescence lifetimes and low cytotoxicity, have endowed the platinum(II) complexes with the potential for biological applications. Also, platinum(II) complexes have been adopted to monitor the dynamics of the nucleolus induced by the addition of RNA synthesis inhibitors. This capability allows the screening of inhibitors and can be advantageous for the development of antineoplastic agents. This work provides a novel strategy for exploring the application of platinum(II) complex-based cell imaging agents based on the mechanism of supramolecular self-assembly. It is envisaged that platinum(II) complexes can be utilized as valuable probes because of the aforementioned appealing advantages.
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Affiliation(s)
- Angela Sin-Yee Law
- Institute of Molecular Functional Materials, State Key Laboratory of Synthetic Chemistry and Department of Chemistry, The University of Hong Kong, Pokfulam Road, Hong Kong, People's Republic of China
| | - Lawrence Cho-Cheung Lee
- Department of Chemistry, City University of Hong Kong, Tat Chee Avenue, Kowloon, Hong Kong, People's Republic of China
| | - Kenneth Kam-Wing Lo
- Department of Chemistry, City University of Hong Kong, Tat Chee Avenue, Kowloon, Hong Kong, People's Republic of China
| | - Vivian Wing-Wah Yam
- Institute of Molecular Functional Materials, State Key Laboratory of Synthetic Chemistry and Department of Chemistry, The University of Hong Kong, Pokfulam Road, Hong Kong, People's Republic of China
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4
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Wong YS, Ng M, Yeung MCL, Yam VWW. Platinum(II)-Based Host–Guest Coordination-Driven Supramolecular Co-Assembly Assisted by Pt···Pt and π–π Stacking Interactions: A Dual-Selective Luminescence Sensor for Cations and Anions. J Am Chem Soc 2021; 143:973-982. [DOI: 10.1021/jacs.0c11162] [Citation(s) in RCA: 23] [Impact Index Per Article: 7.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Affiliation(s)
- Yip-Sang Wong
- Institute of Molecular Functional Materials, State Key Laboratory of Synthetic Chemistry and Department of Chemistry, The University of Hong Kong, Pokfulam Road, Hong Kong, People’s Republic of China
| | - Maggie Ng
- Institute of Molecular Functional Materials, State Key Laboratory of Synthetic Chemistry and Department of Chemistry, The University of Hong Kong, Pokfulam Road, Hong Kong, People’s Republic of China
| | - Margaret Ching-Lam Yeung
- Institute of Molecular Functional Materials, State Key Laboratory of Synthetic Chemistry 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, State Key Laboratory of Synthetic Chemistry and Department of Chemistry, The University of Hong Kong, Pokfulam Road, Hong Kong, People’s Republic of China
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5
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Lochenie C, Insuasty A, Battisti T, Pesce L, Gardin A, Perego C, Dentinger M, Wang D, Pavan GM, Aliprandi A, De Cola L. Solvent-driven chirality for luminescent self-assembled structures: experiments and theory. NANOSCALE 2020; 12:21359-21367. [PMID: 33075118 PMCID: PMC8251519 DOI: 10.1039/d0nr04524a] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/14/2020] [Accepted: 10/12/2020] [Indexed: 05/03/2023]
Abstract
We describe, for a single platinum complex bearing a dipeptide moiety, a solvent-driven interconversion from twisted to straight micrometric assembled structures with different chirality. The photophysical and morphological properties of the aggregates have been investigated as well as the role of the media and concentration. A real-time visualization of the solvent-driven interconversion processes has been achieved by confocal microscopy. Finally, atomistic and coarse-grained simulations, providing results consistent with the experimental observations, allow to obtain a molecular-level insight into the interesting solvent-responsive behavior of this system.
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Affiliation(s)
- Charles Lochenie
- Laboratoire de Chimie et des Biomatériaux Supramoléculaires, Institut de Science et d'Ingénierie Supramoléculaires (UMR 7006), Université de Strasbourg & CNRS, 8, allée Gaspard Monge, 67000 Strasbourg, France.
| | - Alberto Insuasty
- Laboratoire de Chimie et des Biomatériaux Supramoléculaires, Institut de Science et d'Ingénierie Supramoléculaires (UMR 7006), Université de Strasbourg & CNRS, 8, allée Gaspard Monge, 67000 Strasbourg, France.
| | - Tommaso Battisti
- Laboratoire de Chimie et des Biomatériaux Supramoléculaires, Institut de Science et d'Ingénierie Supramoléculaires (UMR 7006), Université de Strasbourg & CNRS, 8, allée Gaspard Monge, 67000 Strasbourg, France.
| | - Luca Pesce
- Department of Innovative Technologies, University of Applied Sciences and Arts of Southern Switzerland, CH-6928 Manno, Switzerland
| | - Andrea Gardin
- Department of Applied Science and Technology, Politecnico di Torino, Corso Duca degli Abruzzi 24, 10129 Torino, Italy.
| | - Claudio Perego
- Department of Innovative Technologies, University of Applied Sciences and Arts of Southern Switzerland, CH-6928 Manno, Switzerland
| | - Mike Dentinger
- Laboratoire de Chimie et des Biomatériaux Supramoléculaires, Institut de Science et d'Ingénierie Supramoléculaires (UMR 7006), Université de Strasbourg & CNRS, 8, allée Gaspard Monge, 67000 Strasbourg, France.
| | - Di Wang
- Karlsruhe Nano Micro Facility (KNMF), Karlsruhe Institute of Technology (KIT), Hermann-von-Helmholtz-Platz 1, 76344 Eggenstein-Leopoldschaffen, Germany
| | - Giovanni M Pavan
- Department of Innovative Technologies, University of Applied Sciences and Arts of Southern Switzerland, CH-6928 Manno, Switzerland and Department of Applied Science and Technology, Politecnico di Torino, Corso Duca degli Abruzzi 24, 10129 Torino, Italy.
| | - Alessandro Aliprandi
- Laboratoire de Chimie et des Biomatériaux Supramoléculaires, Institut de Science et d'Ingénierie Supramoléculaires (UMR 7006), Université de Strasbourg & CNRS, 8, allée Gaspard Monge, 67000 Strasbourg, France.
| | - Luisa De Cola
- Laboratoire de Chimie et des Biomatériaux Supramoléculaires, Institut de Science et d'Ingénierie Supramoléculaires (UMR 7006), Université de Strasbourg & CNRS, 8, allée Gaspard Monge, 67000 Strasbourg, France. and Institut für Nanotechnologie (INT), Karlsruhe Institute of Technology (KIT), Hermann-von-Helmholtz-Platz 1, 76344 Eggenstein-Leopoldschaffen, Germany
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6
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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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Yam VWW, Law ASY. Luminescent d8 metal complexes of platinum(II) and gold(III): From photophysics to photofunctional materials and probes. Coord Chem Rev 2020. [DOI: 10.1016/j.ccr.2020.213298] [Citation(s) in RCA: 63] [Impact Index Per Article: 15.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
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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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Law ASY, Lee LCC, Yeung MCL, Lo KKW, Yam VWW. Amyloid Protein-Induced Supramolecular Self-Assembly of Water-Soluble Platinum(II) Complexes: A Luminescence Assay for Amyloid Fibrillation Detection and Inhibitor Screening. J Am Chem Soc 2019; 141:18570-18577. [PMID: 31709796 DOI: 10.1021/jacs.9b09515] [Citation(s) in RCA: 45] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Abstract
Amyloid fibrillation has been acknowledged as a hallmark of a number of neurodegenerative ailments such as Alzheimer's disease. Accordingly, efficient detection of amyloid fibrillation will allow for great advances in the field of biomedical applications as well as in achieving early medical diagnosis. In this work, a luminescence assay for the sensitive and specific detection of amyloid fibrillation was developed by using platinum(II) complexes as sensing platforms. Supramolecular self-assembly of platinum(II) complexes was induced upon addition of amyloid, leading to alterations in the spectroscopic and luminescence properties of the complexes. As compared to fluorescent dyes, luminescent platinum(II) complexes exhibit attractive large Stokes shifts, phosphorescence lifetimes in the microsecond to submicrosecond regime, and low-energy red emission after aggregation, which are advantageous to biological imaging. At the same time, the platinum(II) complex adopted herein was found to have high photostability, high selectivity and specificity, and low cytotoxicity. The proposed design is the very first approach to detect amyloid fibrillation through the supramolecular self-assembly of luminescent platinum(II) complexes.
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Affiliation(s)
- Angela Sin-Yee Law
- 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
| | - Lawrence Cho-Cheung Lee
- Department of Chemistry , City University of Hong Kong , Tat Chee Avenue , Kowloon , Hong Kong , People's Republic of China
| | - Margaret Ching-Lam Yeung
- 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
| | - Kenneth Kam-Wing Lo
- Department of Chemistry , City University of Hong Kong , Tat Chee Avenue , Kowloon , 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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11
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Chan CWT, Cheng HK, Hau FKW, Chan AKW, Yam VWW. Protamine-Induced Supramolecular Self-Assembly of Red-Emissive Alkynylplatinum(II) 2,6-Bis(benzimidazol-2'-yl)pyridine Complex for Selective Label-Free Sensing of Heparin and Real-Time Monitoring of Trypsin Activity. ACS APPLIED MATERIALS & INTERFACES 2019; 11:31585-31593. [PMID: 31436404 DOI: 10.1021/acsami.9b08653] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/10/2023]
Abstract
A label-free detection assay is developed based on the design and synthesis of a new anionic alkynylplatinum(II) 2,6-bis(benzimidazol-2'-yl)pyridine complex with water-soluble pendants. With the aid of electrostatic interaction and noncovalent metal-metal and π-π stacking interactions, protamine is shown to induce supramolecular self-assembly of platinum(II) complexes with drastic UV-vis absorption and red emission changes. On the basis of the strong binding affinity of protamine and heparin, the ensemble has been further employed to probe heparin by monitoring the spectroscopic changes. Other than heparin, this ensemble can also detect the activity of trypsin, which can hydrolyze protamine into fragments, leading to the deaggregation of platinum(II) complexes. By modulation of the self-assembly properties of platinum(II) complexes via real-time UV-vis absorption and emission studies, the reported assay has been demonstrated to be a sensitive and selective detection method for trypsin, as well as trypsin inhibitor screening, which is essential for drug discovery.
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Affiliation(s)
- Calford Wai-Ting 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
| | - 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 , People's Republic of China
| | - Franky Ka-Wah Hau
- Institute of Molecular Functional Materials (Areas of Excellence Scheme, University Grants Committee (Hong Kong)) and Department of Chemistry , The University of Hong Kong , Pokfulam Road , Hong Kong , People's Republic of China
| | - Alan Kwun-Wa 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
| | - 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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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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13
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Ai Y, Li Y, Fu HLK, Chan AKW, Yam VWW. Aggregation and Tunable Color Emission Behaviors of l-Glutamine-Derived Platinum(II) Bipyridine Complexes by Hydrogen-Bonding, π-π Stacking and Metal-Metal Interactions. Chemistry 2019; 25:5251-5258. [PMID: 30680815 DOI: 10.1002/chem.201805901] [Citation(s) in RCA: 24] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/26/2018] [Indexed: 12/13/2022]
Abstract
An l-glutamine-derived functional group was introduced to the bis(arylalkynyl)platinum(II) bipyridine complexes 1-4. The emission could be switched between the 3 MLCT excited state and the triplet excimeric state through solvent or temperature changes, which is attributed to the formation and disruption of hydrogen-bonding, π-π stacking, and metal-metal interactions. Different architectures with various morphologies, such as honeycomb nanostructures and nanospheres, were formed upon solvent variations, and these changes were accompanied by 1 H NMR and distinct emission changes. Additionally, yellow and red emissive metallogels were formed at room temperature due to the different aggregation behaviors introduced by the substituent groups on bipyridine. The thermoresponsive metallogel showed emission behavior with tunable colors by controlling the temperature. The negative Gibbs free-energy change (ΔG) and the large association constant for excimer formation have suggested that the molecules undergo aggregation through hydrogen-bonding, π-π, and metal-metal interactions, resulting in triplet excimeric emission.
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Affiliation(s)
- Yeye Ai
- Lehn Institute of Functional Materials, School of Chemistry, Sun Yat-Sen University, Guangzhou, 510275, P. R. China.,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
| | - Yongguang Li
- Lehn Institute of Functional Materials, School of Chemistry, Sun Yat-Sen University, Guangzhou, 510275, P. R. China
| | - 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
| | - Alan Kwun-Wa 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
| | - Vivian Wing-Wah Yam
- Lehn Institute of Functional Materials, School of Chemistry, Sun Yat-Sen University, Guangzhou, 510275, P. R. China.,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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Sin-Yee Law A, Yeung MCL, Yam VWW. A Luminescence Turn-On Assay for Acetylcholinesterase Activity and Inhibitor Screening Based on Supramolecular Self-Assembly of Alkynylplatinum(II) Complexes on Coordination Polymer. ACS APPLIED MATERIALS & INTERFACES 2019; 11:4799-4808. [PMID: 30694047 DOI: 10.1021/acsami.8b18739] [Citation(s) in RCA: 23] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/09/2023]
Abstract
A new approach toward acetylcholinesterase (AChE) detection has been demonstrated based on the electrostatic interactions between anionic alkynylplatinum(II) complex molecules and cationic coordination polymer, together with the spectroscopic and emission characteristics of alkynylplatinum(II) complexes upon supramolecular self-assembly. This process involves strengthening of distinct noncovalent Pt(II)···Pt(II) and π-π stacking interactions, which is evidenced by UV-vis absorption, emission, and resonance light scattering results. Such a method has been applied to AChE inhibitor screening, which is important as the demand for AChE inhibitor assays arises along with the drug development for Alzheimer's disease. It affords an emission turn-on response and operates in a continuous and label-free fashion. The low-energy red emission and large Stokes shift of alkynylplatinum(II) complexes are advantageous to biological applications.
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Affiliation(s)
- Angela Sin-Yee Law
- 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
| | - Margaret Ching-Lam Yeung
- 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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Chan AKW, Yam VWW. Precise Modulation of Molecular Building Blocks from Tweezers to Rectangles for Recognition and Stimuli-Responsive Processes. Acc Chem Res 2018; 51:3041-3051. [PMID: 30427166 DOI: 10.1021/acs.accounts.8b00339] [Citation(s) in RCA: 51] [Impact Index Per Article: 8.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
Abstract
Alkynylplatinum(II) terpyridine complexes have been increasingly explored since the previous decades, mainly arising from their intriguing photophysical properties and aggregation affinities associated with their extensive Pt(II)···Pt(II) and π-π stacking interactions. Through molecular engineering, one can modulate their fundamental properties and assembly behavior by introduction of various functional groups and structural features. They can therefore serve as ideal candidates to construct metal complex-based molecular architectures to provide an alternative to organic compounds. The metal-based framework can be simultaneously built from predetermined building blocks, giving rise to their well-defined, unique, and discrete natures for molecular recognition. The individual constituents can contribute to molecular architectures with their integrated properties, allowing the manipulation of the various noncovalent intermolecular forces and interactions for selective guest capture. In this Account, our recent progress in the development of these metallomolecular frameworks based on the alkynylplatinum(II) terpyridine system and their recognition properties toward different guest molecules will be presented. Phosphorescent molecular tweezers have been constructed from the alkynylplatinum(II) terpyridine moiety to demonstrate host-guest interactions with cationic, charge-neutral and anionic platinum(II), palladium(II), gold(I), and gold(III) complexes and their binding affinities were found to be perturbed by different metal···metal, π-π and electrostatic interactions. The host-guest assembly process has also resulted in dramatic color changes, together with the turning on of near-IR (NIR) emissions as a result of extensive Pt(II)···Pt(II) interactions. Further work has also been performed to demonstrate that the tweezers can selectively recognize π-surfaces of different planar π-conjugated organic guests. The framework of molecular tweezers has been extended to a double-decker tweezers structure, or a triple-decker structure, which can bind two equivalents of square-planar platinum(II) guests cooperatively to induce a significant color change in solution, representing rare examples of discrete Magnus' green-like salts. By the approaches of structural modifications, we have further modulated the host architecture from molecular tweezers to molecular rectangles. The rectangles have been found to show selective encapsulation of different transition metal complex guests based on the size and steric environment of the host cavity. The molecular rectangles also exhibit reversible host-guest association, in which guest capture and ejection processes can be manipulated by the pH environment, illustrating a potential approach for precise and smart delivery of therapeutic reagents to the slightly more acidic cancer cells.
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Affiliation(s)
- Alan Kwun-Wa 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
| | - 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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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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17
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Välimäki S, Beyeh NK, Linko V, Ras RHA, Kostiainen MA. A supramolecular host-guest complex for heparin binding and sensing. NANOSCALE 2018; 10:14022-14030. [PMID: 29995039 DOI: 10.1039/c8nr03132k] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/27/2023]
Abstract
Heparin is an anionic polysaccharide widely used in clinics as an anticoagulant. However, heparin usage requires an antidote and sensors for safe operation during and after surgeries. In this study, a host-guest complex capable of selective heparin binding and sensing is presented. Heparin binding affinity was studied in solution with a variety of polycationic macrocyclic hosts, a pillar[5]arene and multiple resorcin[4]arenes, by dynamic light scattering, dye displacement assay, isothermal titration calorimetry, and anti-Xa assay. The measurements reveal the significant importance of multivalency in electrostatic host-heparin binding in competitive, application-relevant media. Additionally, to monitor the heparin concentration, a host-guest indicator displacement assay was performed by following the free and bound state of the methyl orange dye in UV-Vis spectroscopic experiments. Furthermore, this colorimetric sensing based on the tertiary host-guest-heparin supramolecular assembly was utilized in the construction of a calibration curve in a range of blood plasma concentrations.
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Affiliation(s)
- Salla Välimäki
- Department of Bioproducts and Biosystems, Aalto University, P.O. Box 16100, FI-00076 Aalto, Espoo, Finland
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18
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Zhang K, Yeung MCL, Leung SYL, Yam VWW. Energy Landscape in Supramolecular Coassembly of Platinum(II) Complexes and Polymers: Morphological Diversity, Transformation, and Dilution Stability of Nanostructures. J Am Chem Soc 2018; 140:9594-9605. [PMID: 30040413 DOI: 10.1021/jacs.8b04779] [Citation(s) in RCA: 31] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
Establishment of energy landscape has emerged as an efficient pathway for improved understanding and manipulation of both thermodynamic and kinetic behaviors of complicated supramolecular systems. Herein, we report the establishment of energy landscapes of supramolecular coassembly of platinum(II) complexes and polymers, as well as the fabrication of nanostructures with enhanced complexity and intriguing properties from the coassembly systems. In the energy landscape, coassembly at room temperature has been found to only allow the longitudinal growth of platinum(II) complexes and block copolymers into core-shell nanofibers that are the kinetically trapped products. Thermal annealing can switch on the transverse growth of platinum(II) complexes and block copolymers to produce core-shell nanobelts that are the thermodynamically stable nanostructures. The extents of the transverse growth are found to increase with thermal annealing temperatures, leading to nanobelts with larger widths. Besides, rapid quenching of a hot coassembly mixture to room temperature can capture intermediate nanobelt- block-nanofiber nanostructures that are metastable and capable of converting to nanobelts upon further incubation at room temperature. Moreover, sonication treatment has been found to couple with the energy landscape of the coassembly system and open a unique energy-driven pathway to activate the kinetically forbidden nanofiber-to-nanobelt morphological transformation. Furthermore, based on the established energy landscapes, nanosphere- block-nanobelt nanostructures with distinct segmented architectures have been fabricated by thermal annealing of the ternary mixture of platinum(II) complexes, block copolymers, and polymer brushes in a one-pot and single-step procedure. Finally, the nanobelts and nanosphere- block-nanobelt nanostructures are found to possess intriguing morphological stability against acid and dilution, exhibiting characteristics that are important for promising biomedical applications.
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Affiliation(s)
- 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 , P. R. China
| | - Margaret Ching-Lam Yeung
- 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
| | - 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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19
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Law ASY, Yeung MCL, Yam VWW. Arginine-Rich Peptide-Induced Supramolecular Self-Assembly of Water-Soluble Anionic Alkynylplatinum(II) Complexes: A Continuous and Label-Free Luminescence Assay for Trypsin and Inhibitor Screening. ACS APPLIED MATERIALS & INTERFACES 2017; 9:41143-41150. [PMID: 29140068 DOI: 10.1021/acsami.7b12319] [Citation(s) in RCA: 23] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Abstract
A water-soluble anionic alkynylplatinum(II) 2,6-bis(benzimidazol-2'-yl)pyridine (bzimpy) complex has been strategically designed and synthesized to show supramolecular self-assembly with cationic arginine-rich peptides through unique noncovalent Pt(II)···Pt(II) and π-π stacking interactions. Upon introduction of trypsin, the arginine-rich peptides can be hydrolyzed into small fragments and deaggregation of the platinum(II) complex molecules is observed. The aggregation-deaggregation process has been probed by UV-vis absorption, emission, and resonance light scattering (RLS) studies. This platinum(II) complex has been employed for developing a new, continuous and label-free luminescence assay for trypsin as well as for inhibitor screening, and has been successfully applied to detect trypsin in diluted serum solutions.
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Affiliation(s)
- Angela Sin-Yee Law
- 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
| | - Margaret Ching-Lam Yeung
- 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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20
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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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21
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Zhang K, Yeung MCL, Leung SYL, Yam VWW. Living supramolecular polymerization achieved by collaborative assembly of platinum(II) complexes and block copolymers. Proc Natl Acad Sci U S A 2017; 114:11844-11849. [PMID: 29078381 PMCID: PMC5692582 DOI: 10.1073/pnas.1712827114] [Citation(s) in RCA: 65] [Impact Index Per Article: 9.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022] Open
Abstract
An important feature of biological systems to achieve complexity and precision is the involvement of multiple components where each component plays its own role and collaborates with other components. Mimicking this, we report living supramolecular polymerization achieved by collaborative assembly of two structurally dissimilar components, that is, platinum(II) complexes and poly(ethylene glycol)-b-poly(acrylic acid) (PEG-b-PAA). The PAA blocks neutralize the charges of the platinum(II) complexes, with the noncovalent metal-metal and π-π interactions directing the longitudinal growth of the platinum(II) complexes into 1D crystalline nanostructures, and the PEG blocks inhibiting the transverse growth of the platinum(II) complexes and providing the whole system with excellent solubility. The ends of the 1D crystalline nanostructures have been found to be active during the assembly and remain active after the assembly. One-dimensional segmented nanostructures with heterojunctions have been produced by sequential growth of two types of platinum(II) complexes. The PAA blocks act as adapters at the heterojunctions for lattice matching between chemically and crystallographically different platinum(II) complexes, achieving heterojunctions with a lattice mismatch as large as 21%.
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Affiliation(s)
- 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, Hong Kong, People's Republic of China
| | - Margaret Ching-Lam Yeung
- Institute of Molecular Functional Materials (Areas of Excellence Scheme, University Grants Committee, Hong Kong) and Department of Chemistry, The University of Hong Kong, 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, 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, Hong Kong, People's Republic of China
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22
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Zhang M, Xu H, Wang M, Saha ML, Zhou Z, Yan X, Wang H, Li X, Huang F, She N, Stang PJ. Platinum(II)-Based Convex Trigonal-Prismatic Cages via Coordination-Driven Self-Assembly and C 60 Encapsulation. Inorg Chem 2017; 56:12498-12504. [PMID: 28945436 DOI: 10.1021/acs.inorgchem.7b01967] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
The development of three-dimensional (3D) supramolecular coordination complexes is of great interest from both fundamental and application points of view because these materials are useful in molecular catalysis, separation and purification, sensing, etc. Herein, we describe the synthesis of two Klärner's molecular-clip-based tetrapyridyl donors, which possess a C-shaped structure as shown by X-ray analysis, and subsequently use them to prepare four convex trigonal-prismatic cages via coordination-driven self-assembly with two 180° diplatinum(II) acceptors. The cages are fully characterized by multinuclear NMR (31P and 1H) analysis, diffusion-ordered spectroscopy, electrospray ionization time-of-flight mass spectrometry, and UV/vis absorption spectroscopy. Moreover, the incorporation of molecular-clip-based ligands provides these cages with free cavities to encapsulate fullerene C60 via aromatic interactions, which may be useful for fullerene separation and purification. The studies described herein enlarge the scope of the platinum(II)-based directional bonding approach in the preparation of curved 3D metallacages and their host-guest chemistry.
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Affiliation(s)
- Mingming Zhang
- State Key Laboratory for Mechanical Behavior of Materials, Xi'an Jiaotong University , Xi'an 710049, P. R. China.,Department of Chemistry, University of Utah , 315 South 1400 East, Room 2020, Salt Lake City, Utah 84112, United States
| | - Hongchuang Xu
- Key Laboratory of Pesticide and Chemical Biology, Ministry of Education, College of Chemistry, Central China Normal University , Wuhan 430079, P. R. China
| | - Ming Wang
- State Key Laboratory of Supramolecular Structure and Materials, College of Chemistry, Jilin University , Changchun, Jilin 130012, P. R. China
| | - Manik Lal Saha
- Department of Chemistry, University of Utah , 315 South 1400 East, Room 2020, Salt Lake City, Utah 84112, United States
| | - Zhixuan Zhou
- Department of Chemistry, University of Utah , 315 South 1400 East, Room 2020, Salt Lake City, Utah 84112, United States
| | - Xuzhou Yan
- Department of Chemistry, University of Utah , 315 South 1400 East, Room 2020, Salt Lake City, Utah 84112, United States
| | - Heng Wang
- Department of Chemistry, University of South Florida , 4202 East Fowler Avenue, Tampa, Florida 33620, United States
| | - Xiaopeng Li
- Department of Chemistry, University of South Florida , 4202 East Fowler Avenue, Tampa, Florida 33620, United States
| | - Feihe Huang
- State Key Laboratory of Chemical Engineering, Center for Chemistry of High-Performance & Novel Materials, Department of Chemistry, Zhejiang University , Hangzhou 310027, P. R. China
| | - Nengfang She
- Key Laboratory of Pesticide and Chemical Biology, Ministry of Education, College of Chemistry, Central China Normal University , Wuhan 430079, P. R. China
| | - Peter J Stang
- Department of Chemistry, University of Utah , 315 South 1400 East, Room 2020, Salt Lake City, Utah 84112, United States
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23
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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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24
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Aliprandi A, Croisetu CM, Mauro M, Cola LD. Chiral Amplification by Self-Assembly of Neutral Luminescent Platinum(II) Complexes. Chemistry 2017; 23:5957-5961. [DOI: 10.1002/chem.201605103] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/01/2016] [Indexed: 12/24/2022]
Affiliation(s)
- Alessandro Aliprandi
- Laboratoire de Chimie et des Biomatériaux Supramoléculaires; Institut de Science et d'Ingénierie Supramoleculaire (I.S.I.S.); Université de Strasbourg & CNRS UMR 7006; 8 alleé Gaspard Monge 67083 Strasbourg France
| | - Christelle M. Croisetu
- Laboratoire de Chimie et des Biomatériaux Supramoléculaires; Institut de Science et d'Ingénierie Supramoleculaire (I.S.I.S.); Université de Strasbourg & CNRS UMR 7006; 8 alleé Gaspard Monge 67083 Strasbourg France
| | - Matteo Mauro
- Laboratoire de Chimie et des Biomatériaux Supramoléculaires; Institut de Science et d'Ingénierie Supramoleculaire (I.S.I.S.); Université de Strasbourg & CNRS UMR 7006; 8 alleé Gaspard Monge 67083 Strasbourg France
| | - Luisa De Cola
- Laboratoire de Chimie et des Biomatériaux Supramoléculaires; Institut de Science et d'Ingénierie Supramoleculaire (I.S.I.S.); Université de Strasbourg & CNRS UMR 7006; 8 alleé Gaspard Monge 67083 Strasbourg France
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25
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Hebenbrock M, Stegemann L, Kösters J, Doltsinis NL, Müller J, Strassert CA. Phosphorescent Pt(ii) complexes bearing a monoanionic C^N^N luminophore and tunable ancillary ligands. Dalton Trans 2017; 46:3160-3169. [DOI: 10.1039/c7dt00393e] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Abstract
A new monoanionic pincer luminophore is presented, yielding phosphorescent Pt(ii) complexes bearing a neutral 1,2,3-triazole ring introduced via click chemistry. The overall charge, intermolecular interactions and excited state properties can be manipulated and controlled.
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Affiliation(s)
- Marian Hebenbrock
- Institut für Anorganische und Analytische Chemie
- Westfälische Wilhelms-Universität Münster
- D-48149 Münster
- Germany
| | - Linda Stegemann
- Physikalisches Institut and Center for Nanotechnology
- Westfälische Wilhelms-Universität Münster
- D-48149 Münster
- Germany
| | - Jutta Kösters
- Institut für Anorganische und Analytische Chemie
- Westfälische Wilhelms-Universität Münster
- D-48149 Münster
- Germany
| | - Nikos L. Doltsinis
- Institut für Festkörpertheorie and Center for Multiscale Theory and Computation
- Westfälische Wilhelms-Universität Münster
- D-48149 Münster
- Germany
| | - Jens Müller
- Institut für Anorganische und Analytische Chemie
- Westfälische Wilhelms-Universität Münster
- D-48149 Münster
- Germany
| | - Cristian A. Strassert
- Physikalisches Institut and Center for Nanotechnology
- Westfälische Wilhelms-Universität Münster
- D-48149 Münster
- Germany
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26
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You JG, Liu YW, Lu CY, Tseng WL, Yu CJ. Colorimetric assay of heparin in plasma based on the inhibition of oxidase-like activity of citrate-capped platinum nanoparticles. Biosens Bioelectron 2016; 92:442-448. [PMID: 27836604 DOI: 10.1016/j.bios.2016.10.082] [Citation(s) in RCA: 51] [Impact Index Per Article: 6.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/11/2016] [Revised: 10/08/2016] [Accepted: 10/26/2016] [Indexed: 01/08/2023]
Abstract
We report citrate-capped platinum nanoparticles (Pt NPs) as oxidase mimetics for effectively catalyzing the oxidation of 3,3',5,5'-tetramethylbenzidine (TMB), 2,2'-azino-bis (3-ethylbenzthiazoline-6-sulfonic acid), dopamine, and methylene blue in the presence of O2. To confirm oxidase-like activity of citrate-capped Pt NPs, their activity toward oxygen reduction reaction was studied using cyclic voltammetry and rotating ring-disk electrode method. The results obtained showed that Pt NP NPs can catalyze the oxidation of organic substrates to the colored product and the reduction of oxygen to water through a four-electron exchange process. Because the aggregation of Pt NPs can inhibit their oxidase-like activity and protamine can recognize heparin, we prepared the protamine-modified Pt NPs through direct adsorption on the surface of citrate-capped Pt NPs. The electrostatic attraction between heparin and protamine-stabilized Pt NPs induced nanoparticle aggregation, inhibiting their catalytic activity. Therefore, the lowest detectable heparin concentrations through UV-vis absorption and by the naked eye were estimated to be 0.3 and 60nM, respectively. Moreover, the proposed system enabled the determination of the therapeutic heparin concentration in a single drop of blood.
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Affiliation(s)
- Jyun-Guo You
- Department of Chemistry, National Sun Yat-sen University, Taiwan
| | - Yao-Wen Liu
- Department of Applied Physics and Chemistry, University of Taipei, Taiwan
| | - Chi-Yu Lu
- Department of Biochemistry, College of Medicine, Kaohsiung Medical University, Kaohsiung, Taiwan
| | - Wei-Lung Tseng
- Department of Chemistry, National Sun Yat-sen University, Taiwan; School of Pharmacy, College of Pharmacy, Kaohsiung Medical University, Taiwan; Center for Nanoscience and Nanotechnology, National Sun Yat-sen University, Taiwan.
| | - Cheng-Ju Yu
- Department of Applied Physics and Chemistry, University of Taipei, Taiwan.
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27
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Affiliation(s)
- Ching W. Chan
- Department of Chemistry, University of York, York, UK
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28
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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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29
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Li Y, Wong KMC, Wong HL, Yam VWW. Helical Self-Assembly and Photopolymerization Properties of Achiral Amphiphilic Platinum(II) Diacetylene Complexes of Tridentate 2,6-Bis(1-alkylpyrazol-3-yl)pyridines. ACS APPLIED MATERIALS & INTERFACES 2016; 8:17445-17453. [PMID: 27348758 DOI: 10.1021/acsami.6b02840] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/06/2023]
Abstract
Amphiphilic platinum(II) diacetylene complexes of the 2,6-bis(1-butylpyrazol-3-yl)pyridine pincer ligand were designed and synthesized. Helical fibrous nanostructures were obtained through supramolecular assembly of the achiral platinum(II) diacetylene complexes via intermolecular hydrogen bonding, amphiphilic effects, Pt···Pt interactions, and π-π stacking interactions. In situ post-photopolymerization of the diacetylene unit was shown to occur in the preorganized helical fibers.
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Affiliation(s)
- Yongguang Li
- Lehn Institute of Functional Materials, School of Chemistry and Chemical Engineering, Sun Yat-Sen University , Guangzhou 510275, P.R. China
- 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, Pokfulam, Hong Kong
| | - Keith Man-Chung Wong
- 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, Pokfulam, Hong Kong
- Department of Chemistry, South University of Science and Technology of China , 1088 Xueyuan Blvd., Shenzhen 518055, P.R. China
| | - Hok-Lai Wong
- 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, Pokfulam, Hong Kong
| | - Vivian Wing-Wah Yam
- Lehn Institute of Functional Materials, School of Chemistry and Chemical Engineering, Sun Yat-Sen University , Guangzhou 510275, P.R. China
- 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, Pokfulam, Hong Kong
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30
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Synthesis, photophysical characterization and DFT studies on fluorine-free deep-blue emitting Pt(II) complexes. ZEITSCHRIFT FUR NATURFORSCHUNG SECTION B-A JOURNAL OF CHEMICAL SCIENCES 2016. [DOI: 10.1515/znb-2015-0229] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Abstract
Abstract
Herein we show that cyclometalated, square planar Pt(II) complexes can be tuned to achieve deep-blue phosphorescent emitters. For this purpose, the introduction of an electron-donating moiety on two different bidentate NˆN and NˆO fluorine-free luminophores, namely 2-(1H-tetrazol-5-yl)pyridine and picolinic acid, was carried out. The remaining two coordination sites of the Pt(II) metal center were filled by a sterically demanding cyclometallating unit, namely a tertiary phosphite CˆP ligand. This ancillary ligand avoids aggregation and provides high solubility in organic solvents. Based on this approach, we were able to blue-shift the emission of the complexes down to 411 nm, and to achieve a maximal photoluminescence quantum yield of 56% in the solid state.
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31
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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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32
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Noguchi T, Roy B, Yoshihara D, Sakamoto J, Yamamoto T, Shinkai S. Emergent Molecular Recognition through Self-Assembly: Unexpected Selectivity for Hyaluronic Acid among Glycosaminoglycans. Angew Chem Int Ed Engl 2016. [DOI: 10.1002/ange.201511564] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Affiliation(s)
- Takao Noguchi
- Institute for Advanced Study; Kyushu University; 744 Moto-oka, Nishi-ku Fukuoka 819-0395 Japan
- Nanotechnology Laboratory; Institute of Systems; Information Technologies and Nanotechnologies (ISIT); 4-1 Kyudai-Shinmachi, Nishi-ku Fukuoka 819-0388 Japan
| | - Bappaditya Roy
- Institute for Advanced Study; Kyushu University; 744 Moto-oka, Nishi-ku Fukuoka 819-0395 Japan
| | - Daisuke Yoshihara
- Nanotechnology Laboratory; Institute of Systems; Information Technologies and Nanotechnologies (ISIT); 4-1 Kyudai-Shinmachi, Nishi-ku Fukuoka 819-0388 Japan
| | - Junji Sakamoto
- Nanotechnology Laboratory; Institute of Systems; Information Technologies and Nanotechnologies (ISIT); 4-1 Kyudai-Shinmachi, Nishi-ku Fukuoka 819-0388 Japan
| | - Tatsuhiro Yamamoto
- Nanotechnology Laboratory; Institute of Systems; Information Technologies and Nanotechnologies (ISIT); 4-1 Kyudai-Shinmachi, Nishi-ku Fukuoka 819-0388 Japan
| | - Seiji Shinkai
- Institute for Advanced Study; Kyushu University; 744 Moto-oka, Nishi-ku Fukuoka 819-0395 Japan
- Nanotechnology Laboratory; Institute of Systems; Information Technologies and Nanotechnologies (ISIT); 4-1 Kyudai-Shinmachi, Nishi-ku Fukuoka 819-0388 Japan
- Department of Nanoscience; Faculty of Engineering; Sojo University; 4-22-1 Ikeda Kumamoto 860-0082 Japan
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33
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Noguchi T, Roy B, Yoshihara D, Sakamoto J, Yamamoto T, Shinkai S. Emergent Molecular Recognition through Self-Assembly: Unexpected Selectivity for Hyaluronic Acid among Glycosaminoglycans. Angew Chem Int Ed Engl 2016; 55:5708-12. [DOI: 10.1002/anie.201511564] [Citation(s) in RCA: 26] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/12/2015] [Revised: 02/17/2016] [Indexed: 12/16/2022]
Affiliation(s)
- Takao Noguchi
- Institute for Advanced Study; Kyushu University; 744 Moto-oka, Nishi-ku Fukuoka 819-0395 Japan
- Nanotechnology Laboratory; Institute of Systems; Information Technologies and Nanotechnologies (ISIT); 4-1 Kyudai-Shinmachi, Nishi-ku Fukuoka 819-0388 Japan
| | - Bappaditya Roy
- Institute for Advanced Study; Kyushu University; 744 Moto-oka, Nishi-ku Fukuoka 819-0395 Japan
| | - Daisuke Yoshihara
- Nanotechnology Laboratory; Institute of Systems; Information Technologies and Nanotechnologies (ISIT); 4-1 Kyudai-Shinmachi, Nishi-ku Fukuoka 819-0388 Japan
| | - Junji Sakamoto
- Nanotechnology Laboratory; Institute of Systems; Information Technologies and Nanotechnologies (ISIT); 4-1 Kyudai-Shinmachi, Nishi-ku Fukuoka 819-0388 Japan
| | - Tatsuhiro Yamamoto
- Nanotechnology Laboratory; Institute of Systems; Information Technologies and Nanotechnologies (ISIT); 4-1 Kyudai-Shinmachi, Nishi-ku Fukuoka 819-0388 Japan
| | - Seiji Shinkai
- Institute for Advanced Study; Kyushu University; 744 Moto-oka, Nishi-ku Fukuoka 819-0395 Japan
- Nanotechnology Laboratory; Institute of Systems; Information Technologies and Nanotechnologies (ISIT); 4-1 Kyudai-Shinmachi, Nishi-ku Fukuoka 819-0388 Japan
- Department of Nanoscience; Faculty of Engineering; Sojo University; 4-22-1 Ikeda Kumamoto 860-0082 Japan
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Leung FCM, Leung SYL, Chung CYS, Yam VWW. Metal–Metal and π–π Interactions Directed End-to-End Assembly of Gold Nanorods. J Am Chem Soc 2016; 138:2989-92. [DOI: 10.1021/jacs.6b01382] [Citation(s) in RCA: 60] [Impact Index Per Article: 7.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Frankie Chi-Ming 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 SAR, 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 SAR, 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 SAR, 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 SAR, P. R. China
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Dubarle-Offner J, Moussa J, Amouri H, Jouvelet B, Bouteiller L, Raynal M. Induced Circular Dichroism in Phosphine Gold(I) Aryl Acetylide Urea Complexes through Hydrogen-Bonded Chiral Co-Assemblies. Chemistry 2016; 22:3985-90. [DOI: 10.1002/chem.201504441] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/04/2015] [Revised: 12/07/2015] [Indexed: 11/10/2022]
Affiliation(s)
- Julien Dubarle-Offner
- Sorbonne Universités; UPMC Univ Paris 06; CNRS; Institut Parisien de Chimie Moléculaire; 4 Place Jussieu 75005 Paris France
| | - Jamal Moussa
- Sorbonne Universités; UPMC Univ Paris 06; CNRS; Institut Parisien de Chimie Moléculaire; 4 Place Jussieu 75005 Paris France
| | - Hani Amouri
- Sorbonne Universités; UPMC Univ Paris 06; CNRS; Institut Parisien de Chimie Moléculaire; 4 Place Jussieu 75005 Paris France
| | - Benjamin Jouvelet
- Sorbonne Universités; UPMC Univ Paris 06; CNRS; Institut Parisien de Chimie Moléculaire; 4 Place Jussieu 75005 Paris France
| | - Laurent Bouteiller
- Sorbonne Universités; UPMC Univ Paris 06; CNRS; Institut Parisien de Chimie Moléculaire; 4 Place Jussieu 75005 Paris France
| | - Matthieu Raynal
- Sorbonne Universités; UPMC Univ Paris 06; CNRS; Institut Parisien de Chimie Moléculaire; 4 Place Jussieu 75005 Paris France
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Hau FKW, Lo HS, Yam VWW. Synthesis and Photophysical Studies of Calixarene-Based Alkynylplatinum(II) Terpyridine Complexes with Various Receptor Sites for Colorimetric and Luminescence Sensing of Anions. Chemistry 2016; 22:3738-49. [DOI: 10.1002/chem.201503401] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/27/2015] [Indexed: 11/10/2022]
Affiliation(s)
- Franky Ka-Wah Hau
- Institute of Molecular Functional Materials (Areas of Excellence Scheme, University Grants Committee, Hong Kong) and; Department of Chemistry; The University of Hong Kong; Pokfulam Road Hong Kong P. R. China), Fax
| | - Hiu-Suet Lo
- 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), Fax
| | - 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), Fax
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37
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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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38
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Chan CW, Smith DK. Pyrene-based heparin sensors in competitive aqueous media – the role of self-assembled multivalency (SAMul). Chem Commun (Camb) 2016; 52:3785-8. [DOI: 10.1039/c6cc00163g] [Citation(s) in RCA: 32] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
Abstract
Simple functionalised pyrene derivatives can achieve ratiometric sensing of heparin with the precise sensing mechanism depending on whether the sensor self-assembles into a multivalent ligand display.
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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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40
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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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41
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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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42
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Sanning J, Ewen PR, Stegemann L, Schmidt J, Daniliuc CG, Koch T, Doltsinis NL, Wegner D, Strassert CA. Rastertunnelspektroskopisch gesteuertes Design maßgeschneiderter tiefblauer Triplettemitter. Angew Chem Int Ed Engl 2015. [DOI: 10.1002/ange.201407439] [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]
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43
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Köstereli Z, Severin K. Selective detection of Al3+and citric acid with a fluorescent amphiphile. Org Biomol Chem 2015; 13:252-7. [DOI: 10.1039/c4ob02095b] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The assembly and disassembly of a fluorescent amphiphile by Al3+and citrate, respectively, can be used to sense these analytes by fluorescence spectroscopy.
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Affiliation(s)
- Ziya Köstereli
- Institut des Sciences et Ingénierie Chimiques
- Ecole Polytechnique Fédérale de Lausanne (EPFL)
- 1015 Lausanne
- Switzerland
| | - Kay Severin
- Institut des Sciences et Ingénierie Chimiques
- Ecole Polytechnique Fédérale de Lausanne (EPFL)
- 1015 Lausanne
- Switzerland
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44
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Liang J, Huang H, He L, Liu N, Chen Y, Bu W. Tuning the luminescence behaviors of a chloroplatinum(ii) complex by component exchanges of dynamic acylhydrazone bonds. Dalton Trans 2015; 44:66-70. [DOI: 10.1039/c4dt02912g] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
Abstract
The exchange reactions of dynamic acylhydrazone bonds with acylhydrazine or aldehyde lead to controllable emissions of a cationic chloroplatinum(ii) complex in water.
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Affiliation(s)
- Jianjun Liang
- Key Laboratory of Nonferrous Metals Chemistry and Resources Utilization of Gansu Province
- State Key Laboratory of Applied Organic Chemistry
- College of Chemistry and Chemical Engineering
- Lanzhou University
- Lanzhou City
| | - Huanting Huang
- Key Laboratory of Nonferrous Metals Chemistry and Resources Utilization of Gansu Province
- State Key Laboratory of Applied Organic Chemistry
- College of Chemistry and Chemical Engineering
- Lanzhou University
- Lanzhou City
| | - Lipeng He
- Key Laboratory of Nonferrous Metals Chemistry and Resources Utilization of Gansu Province
- State Key Laboratory of Applied Organic Chemistry
- College of Chemistry and Chemical Engineering
- Lanzhou University
- Lanzhou City
| | - Nijuan Liu
- Key Laboratory of Nonferrous Metals Chemistry and Resources Utilization of Gansu Province
- State Key Laboratory of Applied Organic Chemistry
- College of Chemistry and Chemical Engineering
- Lanzhou University
- Lanzhou City
| | - Yanhuan Chen
- Key Laboratory of Nonferrous Metals Chemistry and Resources Utilization of Gansu Province
- State Key Laboratory of Applied Organic Chemistry
- College of Chemistry and Chemical Engineering
- Lanzhou University
- Lanzhou City
| | - Weifeng Bu
- Key Laboratory of Nonferrous Metals Chemistry and Resources Utilization of Gansu Province
- State Key Laboratory of Applied Organic Chemistry
- College of Chemistry and Chemical Engineering
- Lanzhou University
- Lanzhou City
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45
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Sanning J, Ewen PR, Stegemann L, Schmidt J, Daniliuc CG, Koch T, Doltsinis NL, Wegner D, Strassert CA. Scanning-Tunneling-Spectroscopy-Directed Design of Tailored Deep-Blue Emitters. Angew Chem Int Ed Engl 2014; 54:786-91. [DOI: 10.1002/anie.201407439] [Citation(s) in RCA: 31] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/21/2014] [Indexed: 01/16/2023]
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46
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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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47
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Induced Self-Assembly of Platinum(II) Alkynyl Complexes through Specific Interactions between Citrate and Guanidinium for Proof-of-Principle Detection of Citrate and an Assay of Citrate Lyase. Chemistry 2014; 20:13016-27. [DOI: 10.1002/chem.201402137] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/12/2014] [Indexed: 01/26/2023]
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48
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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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49
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Wang L, Li Y, Sun J, Lu Y, Sun Y, Cheng D, Li C. Conjugated poly(pyridinium salt)s as fluorescence light-up probes for heparin sensing. J Appl Polym Sci 2014. [DOI: 10.1002/app.40933] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Affiliation(s)
- Lei Wang
- Key Laboratory of Display Materials & Photoelectric Devices; Ministry of Education; School of Materials Science & Engineering; Tianjin University of Technology; Tianjin 300384 China
| | - Yandong Li
- Key Laboratory of Functional Polymer Materials; Ministry of Education; Institute of Polymer Chemistry; Nankai University; Tianjin 300191 China
| | - Jingfen Sun
- Key Laboratory of Display Materials & Photoelectric Devices; Ministry of Education; School of Materials Science & Engineering; Tianjin University of Technology; Tianjin 300384 China
| | - Yan Lu
- Key Laboratory of Display Materials & Photoelectric Devices; Ministry of Education; School of Materials Science & Engineering; Tianjin University of Technology; Tianjin 300384 China
| | - Yujiao Sun
- Key Laboratory of Display Materials & Photoelectric Devices; Ministry of Education; School of Materials Science & Engineering; Tianjin University of Technology; Tianjin 300384 China
| | - Dandan Cheng
- Key Laboratory of Display Materials & Photoelectric Devices; Ministry of Education; School of Materials Science & Engineering; Tianjin University of Technology; Tianjin 300384 China
| | - Chenxi Li
- Key Laboratory of Functional Polymer Materials; Ministry of Education; Institute of Polymer Chemistry; Nankai University; Tianjin 300191 China
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50
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Stengel I, Strassert CA, De Cola L, Bäuerle P. Tracking Intramolecular Interactions in Flexibly Linked Binuclear Platinum(II) Complexes. Organometallics 2014. [DOI: 10.1021/om4004237] [Citation(s) in RCA: 32] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
Affiliation(s)
- Ilona Stengel
- Institute of Organic Chemistry II and Advanced
Materials, University of Ulm, Albert-Einstein-Allee 11, 89081 Ulm, Germany
- Dutch Polymer Institute (DPI), P.O. Box 902, 5600 AX Eindhoven, The Netherlands
| | - Cristian A. Strassert
- Dutch Polymer Institute (DPI), P.O. Box 902, 5600 AX Eindhoven, The Netherlands
- Center for Nanotechnology and Physikalisches
Institut, Westfälische Wilhelms-Universität Münster, Heisenbergstrasse
11, 48149 Münster, Germany
| | - Luisa De Cola
- Dutch Polymer Institute (DPI), P.O. Box 902, 5600 AX Eindhoven, The Netherlands
- Center for Nanotechnology and Physikalisches
Institut, Westfälische Wilhelms-Universität Münster, Heisenbergstrasse
11, 48149 Münster, Germany
| | - Peter Bäuerle
- Institute of Organic Chemistry II and Advanced
Materials, University of Ulm, Albert-Einstein-Allee 11, 89081 Ulm, Germany
- Dutch Polymer Institute (DPI), P.O. Box 902, 5600 AX Eindhoven, The Netherlands
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