ic4028145_si_002.cif (139.74 kB)
Synthesis, Characterization, and Photophysical Study of Luminescent Rhenium(I) Diimine Complexes with Various Types of N‑Heterocyclic Carbene Ligands
dataset
posted on 2014-03-17, 00:00 authored by Chi-On Ng, Shek-Man Yiu, Chi-Chiu KoA series
of luminescent Re(I) diimine complexes with various types
of N-heterocyclic carbene (NHC) ligands has been synthesized through
the reaction between isocyano Re(I) diimine complexes with different
nucleophiles. These Re(I) NHC complexes were characterized by 1H and 13C NMR and IR spectroscopy, mass spectrometry,
and elemental analysis. One of the precursor complexes fac-{Re(CO)3[CN(H)C6H4-2-O]2Br} and five of the Re(I) diimine complexes
with different types of NHC ligands were also structurally characterized
by X-ray crystallography. In the preparation of these Re(I) NHC complexes,
it is found that the reactivity of the isocyanide ligands in the synthetic
complex precursors is significantly affected by the electronic nature
of the trans ligand. All these complexes displayed 3MLCT [dπ(Re) → π*(N–N)] phosphorescence
in degassed CH2Cl2 and CH3CN solutions
at room temperature. Through the study of the photophysical and electrochemical
properties of these Re(I) NHC complexes, the electronic properties
of different types of NHC ligands were investigated.
