Photoinduced electron transfer reaction in polymer-surfactant aggregates: Photoinduced electron transfer between N,N-dimethylaniline and 7-amino coumarin dyes.
Photoinduced electron transfer between coumarin dyes and N,N-dimethylaniline has been investigated by using steady state and picosecond time resolved fluorescence spectroscopy in sodium dodecyl sulphate (SDS) micelles and PVP-polyvinyl pyrrolidone (SDS) polymer-surfactant aggregates. A slower rate of electron transfer is observed in PVP-SDS aggregates than in polymer-free SDS micelles. A Marcus type inversion is observed in the correlation of free energy change in comparison with the electron transfer rate. The careful investigation reveals that C-151 deviates from the normal Marcus inverted region compared to its analogs C-152 and C-481 due to slower rotational relaxation and smaller translational diffusion coefficient.
Department of Chemistry, Indian Institute of Technology, Kharagpur 721 302, West Bengal, India.
Anjan
A
Chakraborty
Debabrata
D
Seth
Palash
P
Setua
Nilmoni
N
Sarkar
D000042:Absorption; D000814:Aniline Compounds / Q000737:chemistry*; D004396:Coloring Agents / Q000737:chemistry*; D003374:Coumarins / Q000737:chemistry*; D004579:Electron Transport; D005454:Fluorescence Polarization; D010777:Photochemistry; D011205:Povidone / Q000737:chemistry*; D012967:Sodium Dodecyl Sulfate / Q000737:chemistry*; D013501:Surface-Active Agents / Q000737:chemistry*; D013816:Thermodynamics; D013997:Time Factors
D000814:Aniline Compounds; D004396:Coloring Agents; D003374:Coumarins; D013501:Surface-Active Agents; D012967:Sodium Dodecyl Sulfate; C015157:N,N-dimethylaniline; D011205:Povidone; C080488:7-aminocoumarin