TY - JOUR
T1 - Photophysical properties of tricarbonyl(histidine)(diimine)rhenium(I) complexes in aqueous solution
AU - Lin, Ren Jay
AU - Lin, Keh Shiou
AU - Chang, I. Jy
N1 - Funding Information:
We thank Dr. Jay R. Winkler for laser time at the Beckman Institute Laser Resource Center. This research is supported by the National Science Council of the Republic of China.
PY - 1996/2/15
Y1 - 1996/2/15
N2 - Four tricarbonyl(histidine)(diimine)rhenium(I) complexes have been prepared, where diimine is 2,2′-bipyridine (bpy), 4,4′-dicarboxyl-2,2′-bipyridine (bpy(COO)2)2-, 1,10-phenanthroline (phen), and disulfonate 4,7-diphenyl-1,10-phenanthroline (phen-(phSO3)2)2-. All complexes exhibit metal-to-ligand charge-transfer (MLCT) absorption in the 350-380 nm range. Excitation into the MLCT absorption bands results in orange luminescence. The emission maxima for these complexes range from 580 to 625 nm in aqueous solution at room temperature. The excited-state energy, broad emission profiles, and long excited-state lifetimes indicate emission from a 3MLCT state. The complexes with phen-type diimine ligands have much longer lifetimes than those with bpy-type diimine ligands: Re(phen(phSO3)2)(CO)3(His)-, τ = 170 ns; Re(phen)(CO)3(His)+, τ = 100 ns.
AB - Four tricarbonyl(histidine)(diimine)rhenium(I) complexes have been prepared, where diimine is 2,2′-bipyridine (bpy), 4,4′-dicarboxyl-2,2′-bipyridine (bpy(COO)2)2-, 1,10-phenanthroline (phen), and disulfonate 4,7-diphenyl-1,10-phenanthroline (phen-(phSO3)2)2-. All complexes exhibit metal-to-ligand charge-transfer (MLCT) absorption in the 350-380 nm range. Excitation into the MLCT absorption bands results in orange luminescence. The emission maxima for these complexes range from 580 to 625 nm in aqueous solution at room temperature. The excited-state energy, broad emission profiles, and long excited-state lifetimes indicate emission from a 3MLCT state. The complexes with phen-type diimine ligands have much longer lifetimes than those with bpy-type diimine ligands: Re(phen(phSO3)2)(CO)3(His)-, τ = 170 ns; Re(phen)(CO)3(His)+, τ = 100 ns.
KW - Carbonyl complexes
KW - Diimine complexes
KW - Long-lived MLCT excited-state
KW - Rhenium complexes
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U2 - 10.1016/0020-1693(96)04864-5
DO - 10.1016/0020-1693(96)04864-5
M3 - Article
AN - SCOPUS:0039930812
SN - 0020-1693
VL - 242
SP - 179
EP - 183
JO - Inorganica Chimica Acta
JF - Inorganica Chimica Acta
IS - 1-2
ER -