Photochemical reactions in micelles of biological importance

✍ Scribed by M. Chen; M. Grätzel; J.K. Thomas

• Publisher: Elsevier Science
• Year: 1974
• Tongue: English
• Weight: 342 KB
• Volume: 24
• Category: Article
• ISSN: 0009-2614
• DOI: 10.1016/0009-2614(74)80214-9

✦ Synopsis

The fluorcsccncc decay OF pyrene solubilized in aqueous micellar solution of sodium taurocholatc.

n-dodecyl betain and mixed micelles of both with sodium lauryl sulphate (NaLS) has been invcstigatcd by nanosecond laser-photolysis technique to explore the Permeability of these micclles with respect to nonionic and ionic quenchers. hlicrotiscosities of the micellar interior were obtained from fluorescence polarization messurcmenls using 2.methylanthraccnc as a fluoresccnt probe. Bile salt micellcs were found to have a more rigid mterior and wider :Facing of the anionic head groups than NnLS rmcclles. In PI-dodecyl betain micelIes. singet excited pyrene reacts with the quaternnry ammonium head groups to form an escimcr. Neutralization of the ammonium goups suppresses this quenching reaction.