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Non‐Luminescent 1,2‐Diiminetricarbonylrhenium(I) Chloride Complexes – Synthesis, Electrochemical and Spectroscopic Properties of Re(DIAN)(CO) 3 Cl with DIAN = p ‐Substituted Bis(arylimino)acenaphthene
Author(s) -
Knör Günther,
Leirer Markus,
Keyes Tia E.,
Vos Johannes G.
Publication year - 2000
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/(sici)1099-0682(200004)2000:4<749::aid-ejic749>3.0.co;2-b
Subject(s) - diimine , chemistry , acenaphthene , solvatochromism , luminescence , electrochemistry , chloride , photochemistry , rhenium , osmium , solvent , ligand (biochemistry) , metal , inorganic chemistry , ruthenium , organic chemistry , biochemistry , physics , receptor , optoelectronics , electrode , anthracene , catalysis
Re(1,2‐diimine)(CO) 3 Cl compounds containing the p ‐substituted bis(arylimino)acenaphthene derivatives DIAN‐R with R = H, Me, OMe, Br, and Cl were prepared and characterized. The diimine ligands of this series provide unoccupied orbitals at rather low energies and display a pronounced π‐accepting strength. This feature determines the electrochemical and spectroscopic properties of the Re(DIAN‐R)(CO) 3 Cl complexes. All compounds show rhenium(I) to π*(diimine) metal‐to‐ligand charge transfer (MLCT) absorptions in the visible spectral region. The maxima of these CT bands systematically shift upon modification of the substituents R and are sensitive to variations of the solvent polarity (negative solvatochromism). Re(DIAN‐R)(CO) 3 Cl complexes are non‐luminescent both in fluid solution at 298K and in solvent glass at 77K.