structure, vibrations, and theoretical calculations of 2-fluoro- and 3-fluoropyridine in their electronic excited states Ultraviolet absorption spectra

The ultraviolet absorption spectra of 2-fluoropyridine (2FPy) and 3-fluoropyridine (3FPy) vapors have been collected and assigned. For 2FPy about 150 bands were observed for the transitions to the vibronic levels of the S(, ) state at 38 030.4 cm-1. Both single quantum jump transitions to A states and double quantum jumps transitions involving A modes were observed allowing most of the vibrational frequencies in the excited state to be identified. For 3FPy more than a hundred absorption bands associated with the S(n) state at 35 051.7 cm-1 and about 40 broad bands associated with the S(, ) state at 37 339 cm-1 were observed. The experimental work was complemented by ab initio calculations. 2011 Elsevier B.V. All rights reserved.

Ultraviolet absorption spectra, structure, vibrations, and theoretical calculations of 2-fluoro- and 3-fluoropyridine in their electronic excited states Academic Article