Temperature-driven oxygenation rate control by polymeric photosensitizer.
A polymeric photosensitizer, poly(NIPAM-co-BP), consisting of N-isopropylacrylamide (NIPAM) and benzophenone (BP) units, demonstrates a temperature-controlled oxygenation activity in water. The system promotes a heat-induced oxygenation enhancement at <17 degrees C and suppression at >22 degrees C. This unprecedented photo-oxygenation activity is triggered by a heat-induced phase transition of the polymer from coil to micelle, and then to globule state, cleverly controlling the stability and diffusion of singlet oxygen and the location of substrate.
Koizumi
Hisao
H
Research Center for Solar Energy Chemistry and Division of Chemical Engineering, Graduate School of Engineering Science, Osaka University, Toyonaka, Osaka 560-8531, Japan.
Shiraishi
Yasuhiro
Y
Tojo
Sachiko
S
Fujitsuka
Mamoru
M
Majima
Tetsuro
T
Hirai
Takayuki
T
D000178:Acrylamides / Q000737:chemistry*; D001577:Benzophenones / Q000737:chemistry*; D010100:Oxygen / Q000737:chemistry*; D017319:Photosensitizing Agents / Q000737:chemistry*; D011108:Polymers / Q000737:chemistry*; D013696:Temperature
D000178:Acrylamides; D001577:Benzophenones; D017319:Photosensitizing Agents; D011108:Polymers; C522546:poly(N-isopropylacrylamide-co-benzophenone); D010100:Oxygen