Supersonic jet studies of solvation effects on the spectroscopy and photophysics of 4-diethylaminopyridine

Izabela Szydłowska, Yevgeniy Nosenko, Bernhard Brutschy, P. Tarakeshwar, Jerzy Herbich

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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.

Original languageEnglish (US)
Pages (from-to)4981-4991
Number of pages11
JournalPhysical Chemistry Chemical Physics
Volume9
Issue number36
DOIs
StatePublished - Sep 18 2007
Externally publishedYes

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ASJC Scopus subject areas

  • Physics and Astronomy(all)
  • Physical and Theoretical Chemistry

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