A1 Journal article (refereed)
High vibrational overtone excitation-induced conformational isomerization of glycolic acid in solid argon matrix (2018)

Ahokas, J., Kosendiak, I., Krupa, J., Wierzejewska, M., & Lundell, J. (2018). High vibrational overtone excitation-induced conformational isomerization of glycolic acid in solid argon matrix. Journal of Raman Spectroscopy, 49(12), 2036-2045. https://doi.org/10.1002/jrs.5474

JYU authors or editors

Publication details

All authors or editors: Ahokas, Jussi; Kosendiak, Iwona; Krupa, Justyna; Wierzejewska, Maria; Lundell, Jan

Journal or series: Journal of Raman Spectroscopy

ISSN: 0377-0486

eISSN: 1097-4555

Publication year: 2018

Volume: 49

Issue number: 12

Pages range: 2036-2045

Publisher: John Wiley & Sons Ltd.

Publication country: United Kingdom

Publication language: English

DOI: https://doi.org/10.1002/jrs.5474

Publication open access: Not open

Publication channel open access:

Abstract

The high overtone‐induced isomerization of glycolic acid in a low‐temperature argon matrix was investigated using Raman spectroscopy. The Raman spectrum of glycolic acid is presented, and the spectral assignment is supported by vibrational anharmonic calculations. The high overtone excitation of the lowest energy conformer (SSC) at 532 nm induced direct conformational isomerization to higher energy conformers (GAC and AAT). Furthermore, upon excitation at 532 nm GAC and AAT isomerized back to SSC and photo‐induced equilibrium was observed between the conformers. Kinetic model was used to describe the observed isomerization and isomerization rate constants were obtained. No experimental evidence of isomerization between GAC and AAT nor other higher energy conformers were observed.

Keywords: organic compounds; acids; isomerism; photochemistry

Free keywords: isomerization; kinetics; matrix isolation; photo‐induced; Raman

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Ministry reporting: Yes

Reporting Year: 2018

JUFO rating: 1