Highly efficient photoproduction of charge-separated states in donor-acceptor-linked bis(acetylide) platinum complexes.
We report a highly efficient charge separation system, D-Pt-A, where D (triphenylamine) and A (naphthalenediimide) are bonded to the Pt moiety through highly twisted phenylene ethynylene linkages. The quantum yields for the formation of the charge-separated state were determined to be nearly unity. The lifetimes of D(+)-Pt-A(-) were approximately 1 micros at room temperature and much longer at low temperature. The spin-correlated radical ion pair was directly observed by means of time-resolved EPR spectroscopy.
Suzuki
Shuichi
S
Department of Chemistry, Graduate School of Science, Osaka City University, Sugimoto, Sumiyoshi-ku, Osaka 558-8585, Japan.
Sugimura
Ryoji
R
Kozaki
Masatoshi
M
Keyaki
Kazutoshi
K
Nozaki
Koichi
K
Ikeda
Noriaki
N
Akiyama
Kimio
K
Okada
Keiji
K