Unique solvatochromism of a membrane composed of a cationic porphyrin-clay complex.
A novel optically transparent membrane composed of porphyrin-clay mineral complexes was developed. Reversible solvatochromism behavior of the membrane was successfully observed, due to an orientation change of porphyrin in the clay interlayer space. The lambda(max) value of porphyrin was 423 nm in acetone, while it was 464 nm in hexane. The color of the membrane changed from pink to green through to brown, when Sn porphyrin was used. The mechanism for solvatochromism in the present system is very unique compared to those for conventionally reported materials.
Department of Applied Chemistry, Graduate Course of Urban Environmental Sciences, Tokyo Metropolitan University, Minami-ohsawa 1-1, Hachiohji, Tokyo 192-0397, Japan. takagi-shinsuke@tmu.ac.jp
Shinsuke
S
Takagi
Tetsuya
T
Shimada
Dai
D
Masui
Hiroshi
H
Tachibana
Yohei
Y
Ishida
Donald A
DA
Tryk
Haruo
H
Inoue