Accession Number : ADA314789

Title :   Efficient Electronic Energy Transfer in Polymer Nanocomposite Assemblies.

Descriptive Note : Technical rept.,

Corporate Author : ROCHESTER UNIV NY DEPT OF CHEMICAL ENGINEERING

Personal Author(s) : Jenekhe, S. A. ; Yang, C. -J.

PDF Url : ADA314789

Report Date : 09 SEP 1996

Pagination or Media Count : 5

Abstract : Electronic energy transfer plays a critical role in biological photosynthesis, artificial photosynthesis, photovoltaic devices, photocatalysis, and other multichromophore systems and photoinduced processes. Our studies of electronic energy transfer in novel thin film light-harvesting nanocomposite polymer assemblies consisting of a rod-coil copolymer antenna and a conjugated polymer energy trap are presented. Total singlet electronic energy transfer efficiencies as high as 93% were observed at energy trap concentrations as low as 9 mol %. It will be shown that the efficiency of energy transfer can be regulated by the supramolecular structure of the rod-coil copolymer (antenna component). The nanoscale morphology of the nanocomposite polymer systems was characterized by the technique of nonradiative energy transfer, revealing interchromophore distances of 1.0-2.5 nm in the series of materials investigated.

Descriptors :   *COPOLYMERS, *MOLECULAR STRUCTURE, SOLUTIONS(MIXTURES), PHOTOCHEMICAL REACTIONS, CHROMOPHORES, PHOTOLUMINESCENCE, THIN FILMS, EMISSION SPECTRA, ENERGY TRANSFER, ELECTRON ENERGY, ELECTRONIC STATES, ELECTRON DONORS, CATALYSIS, ELECTRON ACCEPTORS, CONCENTRATION(CHEMISTRY), PHOSPHATES, MOLECULAR ENERGY LEVELS, PHOTOSYNTHESIS.

Subject Categories : Polymer Chemistry
      Atomic and Molecular Physics and Spectroscopy

Distribution Statement : APPROVED FOR PUBLIC RELEASE