Mechanism of Charge Transfer in the Molecular DPQ Complex Studied by Time-Resolved Fluorescence Spectroscopy

Article abstract of DOI:10.1021/j100170a011

The pathways of charge separation in the dimethylaniline-mesoporphyrin II-naphthoquinone triad DPQ and its Zn complex were established.The rate constants of electron transfer from P and ZnP to Q were measured to be k = 1.5x10⁹ s^-1 and k > 5x10¹⁰ s^-1, respectively, from the results of picosecond fluorescence spectroscopy.The transformation of the DPQ and DZnPQ triads to the reduced form by NaBH4 treatment results in blocking of the electron-transfer channel from both P and ZnP to Q.The transformation of the DPQ and DZnPQ triads to the reduced forms by NaBH4 results in blocking of the electron-transfer channel from both P and ZnP to Q.The role of structural and conformational changes of triads in the electron-transfer process is discussed.