Bulletin of the Chemical Society of Japan p. 1632 - 1640 (1991)
Update date:2022-08-03
Topics:
Furue, Masaoki
Yoshidzumi, Toshiyuki
Kinoshita, Shuichi
Kushida, Takashi
Nozakura, Shun-ichi
Kamachi, Mikiharu
A novel series of polymethylene-linked heterobinuclear complexes of polypyridine ruthenium(II)/osmium(II) complex Ru(II)(bpy)2Mebpy-(CH2)n-MebpyOs(II)(bpy)2(bpy=2,2'-bipyridine and N=2, 3, 5, and 7), 1, was prepared.The photophysical behavior was examined in various solvents.The emission spectra of 1 (excitation wavelength: 455 nm) showed a nearly complete quenching of Ru(II) -> ?*(bpy) metal-to-ligand charge transfer (MLCT) emission and the enhancement of Os(II) -> ?*(bpy) MLCT emission.The luminescence lifetime measurements by a time-correlated single photon-counting method provided evidence that intramolecular energy transfer is a significant pathway for the observed emission quenching.The rate constants of the intramolecular energy transfer in ethanol are 5.3 * 108, 3.3 * 108, 1.3 * 108, and 1.0 * 108 s-1 for 1 (n=2, 3, 5, and 7), respectively.They were found to be proportional to the inverse sixth power on the center-to-center distance of the two complexes.The mechanisms is discussed in terms of the Foerster (a dipole-dipole interaction) mechanism.
View MoreSuzhou Lixin Pharmaceutical Co., Ltd.
Contact:86-512-88169812
Address:21 Tangxi Road, Suzhou New District, Suzhou 215151
Tianjin Emulsion Science&Technology Development Co.,Ltd
Contact:13901380442
Address:Vake Garden New Town New Yi Bai Road Beichen District Tianjin,China
Contact:0086-357-6662688
Address:Zhaocheng town, Hongtong County, Linfen City, Shanxi Province
Changzhou Welton Chemical Co., Ltd,
Contact:0086-519-85910828,85920537,85912897
Address:No.8 Jinlong Road, Binjiang Park, Changzhou, Jiangsu, China.
WEIFANG DERUN CHEMICAL CO.,LTD
Contact:86-536-8956886
Address:weifang
Doi:10.1016/S0040-4020(01)89841-0
(1988)Doi:10.1016/j.tet.2008.05.122
(2008)Doi:10.1016/S0040-4039(00)84197-0
(1986)Doi:10.1016/j.tetlet.2008.05.062
(2008)Doi:10.1021/jm00384a024
(1987)Doi:10.1016/S0040-4039(00)95109-8
(1985)