PICOSECOND SPECTROSCOPIC STUDIES OF ENERGY TRANSFER IN PHYCOBILIPROTEINS AND MODEL DYE SYSTEMS.

摘要

nergy transfer was investigated in the ;The fluorescence decay kinetics of triphenylmethane dyes were studied as a function of viscosity. This dye system provided a calibration of the microchannel plate time resolution, and allowed us to study the effect of molecular conformation on the competition between non-radiative relaxation and fluorescence decay rates. Contrary to previous literature results, we found no regime in which the log of the fluorescence decay lifetimes of TPM dyes has a linear dependence on the log of the viscosity. Decay kinetics in various solvents did not indicate any solvent effect; nor was there any dependence on excitation and emission wavelength. (Abstract shortened with permission of author.).;A microchannel plate detector was developed for use in the single-photon timing system and a time resolution of 10-14 ps was achieved. The decay kinetics of the