Dynamics of transfer of electron excitation in a donor-acceptor system with a carbon chain and ways of its relaxation

Abstract

The optical properties and dynamics of transport of electron excitation and the ways of its relaxation in the supramolecular D–π–A complex on the basis of merocyanines have been investigated. There have been found two components in the transfer of charge: fast and slow, which correspond to different conformational states of the carbon chain in merocyanines. It was found that the main photoluminescence of the studied molecular solutions of merocyanines by its nature is similar to the exciplex luminescence, as a manifestation of resonant and charge transfer interaction in an excited state. The lifetime in this state is about 2000 ps.

Keywords

• merocyanines
• photoluminescence
• time-resolved emission spectra
• charge transfer
• donor-acceptor system
• carbon chain