Critical aggregation concentrations of organic gel-forming lipids in nonpolarorganicmedia such as benzene were found to be determined by measuring the first-order rate constants of merocyanine-to-spiropyran thermal isomerizations for spiropyrans added as probes.
Photochromic transformations of amphiphilic spiropyran in acetonitrile solutions and at the air/water interface
作者:D. A. Ivakhnenko、A. V. Shokurov、G. V. Lyubimova、N. L. Zaichenko、V. V. Arslanov、O. A. Raitman
DOI:10.1007/s11172-018-2368-0
日期:2018.12
The results of a study of the photochromic properties of 1´-hexadecyl-3´,3´-dimethyl-6-nitro-1´,3´-dihydrospiro[chromene-2,2´-indole] (SP) are presented. The kineticcharacteristics of photophysical processes occurring in acetonitrile solution of SP upon irradiation with UV light and during dark relaxation are determined. It is shown that spiropyran modified at the nitrogen atom by a long-chain hydrocarbon
Photochemical Switching of Electrochemical Process by Spiropyran LB Films
作者:Katsuhiko Nishiyama、Masamichi Fujihira
DOI:10.1246/cl.1987.1443
日期:1987.7.5
Photoelectrochemical control of the ion-blocking ability of the Langmuir–Blodgett (LB) film as an ion gate was demonstrated on a gold optically semi-transparent electrode (Au OTE) coated with multilayers containing photoresponsive amphiphilic compounds. When UV light was irradiated upon the modified Au OTE, this LB film became more compact to block permeation of ions into and out of the LB film and therefore inhibited electrochemical reactions of the redox active species in solution. On the other hand, when visible light was irradiated, this layer became more loose and redox species could penetrate the LB film.
High and rapid response in photo-induced potential changes across a poly(vinyl chloride)/spirobenzopyran membrane
作者:Jun-ichi Anzai、Akihiko Ueno、Tetsuo Osa
DOI:10.1039/c39840000688
日期:——
Photo-inducedpotentialchanges of more than 100mV were attained with rapid response time (about 20 s)across a poly(vinylChloride)/spirobenzopyran membrane.
Comparison of the photochromism of a spirobenzopyran derivative in unilamellar surfactant vesicles and solvent-cast surfactant films
作者:Calum J. Drummond、D. Neil Furlong、George Georgaklis
DOI:10.1039/ft9908603913
日期:——
been examined in a number of different aqueous unilamellarsurfactantvesicle solutions and solvent-castsurfactantfilm matrices. The thermal decolouration of SP-16 in solvent cast dihexadecylphosphate (DHP) films and unilamellar dimyristoyl phosphatidylcholine (DMPC) vesicles exhibits single first-order kinetics. In DHP vesicles and solvent-cast DMPC films the thermal decolouration deviates from single