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Molybdenum Complexes Bearing (Bi)thienyl‐ or Arylthienyl‐Substituted π‐Conjugated Spacers: Synthesis, Electrochemical, Spectroscopic and Nonlinear Optical Properties
Author(s) -
Fonseca António M.,
Belsley Michael,
Gomes Etelvina Matos,
Castro M. Cidália R.,
Raposo M. Manuela M.
Publication year - 2010
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.201000218
Subject(s) - chemistry , conjugated system , electrochemistry , absorption spectroscopy , molybdenum , photochemistry , spectroscopy , absorption (acoustics) , visible spectrum , spectral line , inorganic chemistry , electrode , organic chemistry , optoelectronics , polymer , optics , physics , quantum mechanics , astronomy
A series of complexes trans ‐[FMo(N=NCHL)(dppe) 2 ][BF 4 ] {L = (bi)thienyl or arylthienyl}, were synthesized and fully characterized by 1 H, 13 C, 31 P NMR, IR and UV/Vis spectroscopy. The electronic spectra and electrochemical behavior of the complexes were investigated. The electronic absorption spectra of these complexes display a broad low‐energy band in the visible region attributable to metal‐to‐ligand charge‐transfer (MLCT) transitions. The electron‐conjugated effect with the heterocyclic nucleus led to a notable improvement of visible light absorption and marked changes in the electrochemical behavior. The hyperpolarizabilities β of the synthesized compounds were evaluated using the hyper‐Rayleigh scattering technique.