PHOTOINDUCED ENERGY AND ELECTRON TRANSFER PROCESSES IN SELF-ASSEMBLING COMPLEXES OF CdSe/ZnS WATER-SOLUBLE NANOCRYSTALS AND CATIONIC PORPHYRINS

摘要

The theoretical analysis of the electronic excitation energy transfer in the complexes between water soluble CdSe/ZnS quantum dot (QD) and 5,10,15,20-tetrakis(4-N-methylpyridyl)porphyrin Zn complex (ZnTMPyrP~(4+)) has been performed. Quantum chemical methods have been applied to check a possibility of electron transfer processes in this system. The quantum yield and the lifetime of the QDs luminescence in this system are shown to be determined not only by excitation energy transfer but additionally by photoinduced electron transfer from QD to porphyrin and from passivating moieties of mercaptocarboxylic acids S~-(CH_2)_nCOO~- to QD.