title: Photoinduced interaction of riboflavin dye with different reducing agents in aqueous and liposome media.
abstract: The photoelectrochemical and spectral studies of riboflavin have been carried out in aqueous and phosphatidylcholine (PC) liposome media in presence of different reducing agents such as I-, Br-, Cl-, Fe2+, Fe(CN)6(4-) and Cu+. The results from both the studies support the photoinduced electron transfer from the reducing agent to the excited riboflavin dye. Moreover, a good correlation between photovoltages/Stern-Volmer quenching constants versus reduction potentials of the reducing agents also confirms the above electron transfer in the photoexcited state. An alternative method has been developed to determine the Stern-Volmer quenching constant.
authors.affiliation: Department of Chemistry, Centre for Surface Science, Jadavpur University, Kolkata 700 032, India. bhowmikbbju@yahoo.co.in
authors.forename: Benoy B
authors.initials: BB
authors.lastname: Bhowmik
authors.forename: Arpita
authors.initials: A
authors.lastname: Sil
mesh_terms: D004396:Coloring Agents / Q000737:chemistry; D003300:Copper / Q000737:chemistry; D004563:Electrochemistry; D004579:Electron Transport; D005296:Ferrous Compounds / Q000737:chemistry; D006219:Halogens / Q000737:chemistry; D008081:Liposomes / Q000737:chemistry*; D010713:Phosphatidylcholines / Q000737:chemistry; D010777:Photochemistry; D019163:Reducing Agents / Q000737:chemistry*; D012256:Riboflavin / Q000737:chemistry*; D013050:Spectrometry, Fluorescence; D014867:Water / Q000737:chemistry*
chemical_list: D004396:Coloring Agents; D005296:Ferrous Compounds; D006219:Halogens; D008081:Liposomes; D010713:Phosphatidylcholines; D019163:Reducing Agents; D014867:Water; D003300:Copper; D012256:Riboflavin