Spectral and luminescent properties of jet-cooled dinaphthofuran

摘要

The fluorescence and fluorescence excitation spectra of jet-cooled dinaphtho[2,1-b:1',2'-d]furan (dinaphthofuran) molecules, as well as their complexation with inert gases Ar, Kr, and Xe, are studied. The indicatrices of the degree of polarization of fluorescence of dinaphthofuran molecules upon excitation of the electronic transitions S-0-S-1, and S-0-S-2 are calculated as functions of the intramolecular orientation of the transition dipole moments. The fluorescence polarization spectrum is measured under excitation within the rotational contour of the line of the purely electronic transition nu(0)(0) = 29294 cm(-1). In contrast to complex planar molecules, the SO-S, fluorescence excitation spectrum of dinaphthofuran is found to be continuous, with the Q branch of the rotational contour being absent. The fluorescence excitation spectra of van der Waal s complexes of dinaphthofuran with inert gases exhibit multiplet lines, which is associated with the helical structure of the molecules studied. studied.