Photoinduced interaction of riboflavin dye with different reducing agents in aqueous and liposome media.
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.
Bhowmik
Benoy B
BB
Department of Chemistry, Centre for Surface Science, Jadavpur University, Kolkata 700 032, India. bhowmikbbju@yahoo.co.in
Sil
Arpita
A
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*
D004396:Coloring Agents; D005296:Ferrous Compounds; D006219:Halogens; D008081:Liposomes; D010713:Phosphatidylcholines; D019163:Reducing Agents; D014867:Water; D003300:Copper; D012256:Riboflavin