β Scribed by Thomas A. Moore; Pill-soon Song
No coin nor oath required. For personal study only.
The polarization of fluorescence excitation and emission bands of all-nuns retinol in ether at 77Β°K has been measured at relatively high resolution. 7?le main escitation band as well as the fluorescence band showed a degree of polnrization approaching that of the theoretical maximum of 0.5 for a linear oscillator under photoselective conditions.
These results are consistent with the assignment 'that the main absorption and fluorescence bands originate from the long--axis polarized 'B + 'A transition, as expected from free electron theory. Dipheny: octatetraene was also studied, yielding results similar to the retinot system.
π SIMILAR VOLUMES
PoIarized two-photon fluorescence excitation spectra of indole in hexane, benzimidazole in isopropanoi, and benzimidazole cation in methanol-HaSO.,, all at 0.2 M and 25Β°C are reported for the excitation range 470-600 nm, the region of their L, and L, bands. Relative two-photon absorptivities are ded