Thermal isomerization rate of a long chain spiropyran in bilayer matrix. Dependence of aggregate dimension of bilayer formed by dioctadecyldimethylammonium …
The thermal isomerization rate from UV-induced merocyanine to spiropyran is observed in an ammonium bilayer membrane of varied aggregate dimension. In smaller bilayer aggregates, the reaction rate is retarded due to increase of polarity around the chromophore possibly as the result of larger penetration of water molecules into the bilayer matrix having the greater membrane curvature.
![Spiro[2H-1-benzopyran-2,2'-[2H]indole], 1',3'-dihydro-3',3'-dimethyl-6-nitro-1'-octadecyl- (en)结构式](https://image.chemsrc.com/caspic/440/70877-18-8.png)