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A Luminescent Rhenium(I) Metallacycle with Oxygen and Nitrogen Donor Atoms: Photophysical and Theoretical Studies
Author(s) -
Bhattacharya Dibyendu
Publication year - 2014
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.201400067
Subject(s) - chemistry , phosphorescence , metallacycle , rhenium , quantum yield , photochemistry , luminescence , nitrogen , afterglow , yield (engineering) , fluorescence , inorganic chemistry , organic chemistry , optoelectronics , x ray crystallography , physics , gamma ray burst , quantum mechanics , astronomy , diffraction , optics , materials science , metallurgy
A new N , O ‐bischelator‐bridged dirhenium(I) metallacycle, [Re 2 (CO) 6 (μ‐η 4 ‐mpdo)(μ‐4,4′‐tmdp)] ( 1 , H 2 mpdo = 2‐methylpyrimidine‐4,6‐diol, 4,4′‐tmdp = 4,4′‐trimethylenedipyridine) has been self‐assembled in a one‐pot reaction in p ‐xylene at 140 °C. Compound 1 displays unusual multiple phosphorescence emissions at room temperature; an emission quantum yield of 0.26 ± 0.03 and triexponential decay with an average radiative decay constant of 0.052 μs ( λ max = 342 nm) were determined. These results as well as those of DFT/TDDFT calculations confirmed the nature of the emitting states.