Time-resolved fluorescence of ferrocene/flavin/viologen/TCNQ hetero LB film

Time-reserved fluorescence was measured with hetero Langmuir-Blodgett (LB) films consisting of ferrocene/flavin/viologen/TCNQ on quartz substrate. Fer rocene, flavin, viologen and TCNQ were used as a electron donor (D), sensit izer (S), relay (R) and acceptor (A) units, respectively. Power dependence on charge separation rate was investigated to examine the local heating pro blem or the excited state annihilation. Based on the decay of fluorescence, charge separation from excited S to R (or A) was calculated. Result showed that long-range electron transfer from S to A occurred in the D/S/R/A hete ro LB film in addition to the electron transfer from S to R.