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Spectroscopic and Computational Study on New Blue Emitting ReL(CO) 3 Cl Complexes Containing Pyridylimidazo[1,5‐ a ]pyridine Ligands
Author(s) -
Garino Claudio,
Ruiu Tiziana,
Salassa Luca,
Albertino Andrea,
Volpi Giorgio,
Nervi Carlo,
Gobetto Roberto,
Hardcastle Kenneth I.
Publication year - 2008
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.200800348
Subject(s) - chemistry , pyridine , ligand (biochemistry) , acetonitrile , singlet state , trifluoromethyl , crystallography , fluorescence , spectroscopy , triplet state , photochemistry , stereochemistry , molecule , medicinal chemistry , excited state , organic chemistry , receptor , biochemistry , physics , alkyl , quantum mechanics , nuclear physics
The structural and photophysical properties of three new ReL(CO) 3 Cl complexes (Re L1 –Re L3 ) and their 1‐(2‐pyridyl)imidazo[1,5‐ a ]pyridine ligands, namely 3‐methyl‐1‐(2‐pyridyl)imidazo[1,5‐ a ]pyridine ( L1 ), 1‐(2‐pyridyl)‐3‐[4‐(trifluoromethyl)phenyl]imidazo[1,5‐ a ]pyridine ( L2 ), and 3‐(4‐nitrophenyl)‐1‐(2‐pyridyl)imidazo[1,5‐ a ]pyridine ( L3 ), were studied by spectroscopy, X‐ray diffraction, and computational methods. Re L1 –Re L3 have high‐energy singlet emissions arising from a π → π* ligand‐centered state. In oxygen‐free acetonitrile solutions, the complexes display dual fluorescence due to intense ligand‐centered triplet emission.(© Wiley‐VCH Verlag GmbH & Co. KGaA, 69451 Weinheim, Germany, 2008)
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