A cationic chloroplatinum(II) complex was found to show remarkable luminescence enhancement upon self-assembly with tripodal dynamic acylhydrazone-bridged sulfonates in water. The successive exchange reactions with acylhydrazine or aldehyde resulted in a controllable decrease in the luminescence intensities.
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http://dx.doi.org/10.1039/c4dt02912g | DOI Listing |
Cyclometalated 1,3-bis(8-quinolyl) phenyl chloroplatinum(II) (Pt1) shows selective luminescence transduction of G-quadruplex binding over duplex DNA. The effect is enhanced on association with parallel and hybrid G-quadruplex structures over other topologies. The kinetics of binding are studied for c-myc and the response is found to be partially reversible in a displacement assay.
View Article and Find Full Text PDFChem Asian J
July 2017
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.
Platinum(II)-containing polystyrene (PS) complexes have been synthesized by dehydrohalogenation of α-alkyne-PS and chloroplatinum(II) precursors with different functionalities on the terpyridine ligands. Through modulation of the hydrophilicity/hydrophobicity of the terpyridine ligands and hence the overall amphiphilicity of the complexes, the complexes can undergo self-assembly into various superstructures with remarkable luminescence properties in different solution mixtures, as revealed by electron microscopy, UV/Vis absorption and emission spectroscopy. Pt⋅⋅⋅Pt and/or π-π interactions among the platinum(II) terpyridine moieties are found to play substantial roles in the stabilization of the superstructures and the turn-on/off of the triplet metal-metal-to-ligand charge transfer ( MMLCT) emission of the complexes.
View Article and Find Full Text PDFInorg Chem
June 2016
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.
Several photochromic cyclometalated alkynylplatinum(II) complexes with tridentate 1,3-bis(N-alkylbenzimidazol-2'-yl)benzene (bzimb) ligands have been synthesized by the reaction of the corresponding chloroplatinum(II) bzimb precursor complexes with the photochromic ligand TMS-C≡C-Th-DTE in the presence of sodium hydroxide. They have been characterized by (1)H NMR spectroscopy and positive-ion FAB or ESI mass spectrometry and confirmed by elemental analysis. One of the complexes has also been characterized by X-ray crystallography.
View Article and Find Full Text PDFAnticancer Res
May 2015
Discipline of Biomedical Science, Sydney Medical School, The University of Sydney, Lidcombe, Australia
With the idea that platinum compounds that bind with DNA differently than cisplatin may be better-able to overcome platinum resistance in ovarian tumor, the monofunctional platinum complex tris(imidazo(1,2-α)pyridine) chloroplatinum(II) chloride (coded as LH6) has been synthesized and investigated for its activity, alone and in combination with the phytochemicals curcumin and quercetin, against human ovarian A2780, A2780(cisR) and A2780(ZD0473R) cancer cell lines. LH6 is found to be more active than cisplatin against the resistant cell lines and its bolus combinations with curcumin and quercetin are found to produce more pronounced cell kill. Whereas platinum accumulation from cisplatin is found to increase almost linearly with time, that from LH6 reaches a maximum at 4 h and is somewhat lowered at 24 h.
View Article and Find Full Text PDFDalton Trans
January 2015
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, Gansu Province, China.
A cationic chloroplatinum(II) complex was found to show remarkable luminescence enhancement upon self-assembly with tripodal dynamic acylhydrazone-bridged sulfonates in water. The successive exchange reactions with acylhydrazine or aldehyde resulted in a controllable decrease in the luminescence intensities.
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