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Synthesis and Luminescence Properties of Cycloplatinated Complexes with a Chelating N ∧ C Pyridine‐Derived N‐Heterocyclic Carbene – Influence of 2,4,6‐Triphenylphosphinine versus Triphenylphosphine
Author(s) -
Moussa Jamal,
Freeman Gemma R.,
Williams J. A. Gareth,
Chamoreau LiseMarie,
Herson Patrick,
Amouri Hani
Publication year - 2016
Publication title -
european journal of inorganic chemistry
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.667
H-Index - 136
eISSN - 1099-0682
pISSN - 1434-1948
DOI - 10.1002/ejic.201500879
Subject(s) - chemistry , triphenylphosphine , phosphorescence , denticity , pyridine , carbene , ligand (biochemistry) , chelation , luminescence , photochemistry , photoluminescence , crystal structure , crystallography , medicinal chemistry , inorganic chemistry , fluorescence , organic chemistry , biochemistry , physics , receptor , optoelectronics , quantum mechanics , optics , catalysis
Two cycloplatinated complexes of the form [Pt(NC)CH 3 ( P )] + incorporating a rare, bidentate NC‐chelating pyridylpyridylidene ligand are reported. The phosphorus‐based ligand P is either 2,4,6‐triphenylphosphinine or triphenylphosphine. These mononuclear complexes have been fully characterised in solution and by single‐crystal X‐ray diffraction analysis. UV/Vis absorption and photoluminescence spectroscopy studies reveal strong phosphorescence from the phosphinine compound at 77 K but no emission from its triphenylphosphine analogue. This contrasting behaviour can be traced to the π‐acceptor ability of the phosphabenzene ring, as corroborated by electrochemical and time‐dependent DFT (TD‐DFT) calculations.