Abstract
Abstract— The kinetic properties of O2(1Δg) have been examined in unilamellar vesicle dispersions composed of didodecyldimethylammonium bromide, di‐n‐octadecyl phosphate and egg lecithin. Light absorbing sensitizers 2‐acetonaphthone, methylene blue and a methylene blue derivative of enhanced water‐solubility were used. The rate parameters for singlet oxygen were monitored by observing the time profile of the bleaching of the reactive substrates diphenylisobenzofuran and anthracene dipropionate. The natural lifetime of O2(1Δg) in D2O‐based suspensions was shown to be 46/JS in good agreement with that found earlier for D2O alone and D2O‐based micelle systems. The bimolecular rate constants for reaction with diphenylisobenzofuran and dimethylindole (both lipid‐bound) and histidine (water‐bound) were also in close conformity with the values found earlier in micellar media. Kinetic spectrophotometry has been shown to be a useful technique for examining rate parameters in these heterogeneous media.
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
