title: Supersonic jet studies of solvation effects on the spectroscopy and photophysics of 4-diethylaminopyridine.
abstract: We present the results of spectroscopic and photophysical investigations of 4-diethylaminopyridine (DEAP) and its 1 : 1 complexes with a number of protic solvents such as water and various alcohols of different acidity isolated under supersonic jet conditions. While a double resonance vibrational spectroscopic method was employed to investigate the size and geometrical structure of jet-cooled clusters, laser-induced fluorescence spectroscopy was used to examine the changes of photophysics induced by complexation of DEAP with solvent molecule(s). The results obtained from ab initio calculations enable the assignment of geometries and of the vibrational spectra of the clusters in the OH-stretch region. The comparison of the experimental and calculated vibrational spectra indicates that the solvent molecule is hydrogen-bonded to the pyridine nitrogen atom. Dual luminescence is observed only for the complexes with alcohols of relatively strong acidity.
authors.affiliation: Institute of Physical Chemistry, Polish Academy of Sciences, Kasprzaka 44/52, 01-224, Warsaw, Poland.
authors.forename: Izabela
authors.initials: I
authors.lastname: Szydłowska
authors.forename: Yevgeniy
authors.initials: Y
authors.lastname: Nosenko
authors.forename: Bernhard
authors.initials: B
authors.lastname: Brutschy
authors.forename: P
authors.initials: P
authors.lastname: Tarakeshwar
authors.forename: Jerzy
authors.initials: J
authors.lastname: Herbich