Supramolecular triplet photosensitizer. Effects of the cation binding mode on E-Z isomerization of 1,2-dichloroethylene.
[reaction: see text] Effects of metal cation recognition on photosensitized E-Z isomerization of 1,2-dichloroethylene have been investigated with two types of m,p- and o,o'-podand (oligo-oxyethylene unit) benzophenones 2 and 3. With increasing cation size, the %Z ratio at the photostationary state was changed from 67 to 91% for 2 but remained almost unchanged (86-88%) for 3. These results were interpreted in terms of the variation of excited triplet energy, E(T), associated with the cation complexation of these photosensitizers 2 and 3.
Kokubo
Ken
K
Division of Applied Chemistry, Graduate School of Engineering, Osaka University, Suita, Osaka 565-0871, Japan. kokubo@chem.eng.osaka-u.ac.jp
Kitasaka
Kouji
K
Oshima
Takumi
T