A1 Journal article (refereed)
Conformational-Dependent Photodissociation of Glycolic Acid in an Argon Matrix (2023)
Ahokas, J., Nikitin, T., Krupa, J., Kosendiak, I., Fausto, R., Wierzejewska, M., & Lundell, J. (2023). Conformational-Dependent Photodissociation of Glycolic Acid in an Argon Matrix. Photochem, 3(2), 197-208. https://doi.org/10.3390/photochem3020013
JYU authors or editors
Publication details
All authors or editors: Ahokas, Jussi; Nikitin, Timur; Krupa, Justyna; Kosendiak, Iwona; Fausto, Rui; Wierzejewska, Maria; Lundell, Jan
Journal or series: Photochem
eISSN: 2673-7256
Publication year: 2023
Publication date: 31/03/2023
Volume: 3
Issue number: 2
Pages range: 197-208
Publisher: MDPI AG
Publication country: Switzerland
Publication language: English
DOI: https://doi.org/10.3390/photochem3020013
Publication open access: Openly available
Publication channel open access: Open Access channel
Publication is parallel published (JYX): https://jyx.jyu.fi/handle/123456789/86299
Abstract
Ultraviolet-induced photodissociation and photo-isomerization of the three most stable conformers (SSC, GAC, and AAT) of glycolic acid are investigated in a low-temperature solid argon matrix using FTIR spectroscopy and employing laser radiation with wavelengths of 212 nm, 226 nm, and 230 nm. The present work broadens the wavelength range of photochemical studies of glycolic acid, thus extending the understanding of the overall photochemistry of the compound. The proposed kinetic model for the photodissociation of glycolic acid proceeds from the lowest energy conformer (SSC). The model suggests that ultraviolet light induces isomerization only between the SSC and GAC conformers and between the SSC and AAT conformers. The relative reaction rate coefficients are reported for all proposed reactions. These results suggest that the direct photodissociation of GAC and AAT conformer does not occur in an argon matrix. The main photodissociation channel via the SSC conformer produces formaldehyde–water complexes. The proposed photodissociation mechanism emphasizes that the conformers’ relative abundancies can significantly affect the photodissociation rate of the molecule. For example, in the case of high relative GAC and AAT concentrations, the ultraviolet photodissociation of glycolic acid requires the proceeding photo-isomerization of GAC and AAT to SSC.
Keywords: decomposition (chemistry); reaction mechanisms; photochemistry
Free keywords: glycolic acid; hydroxy acid; dissociation; isomerization; chemical kinetics; reaction mechanism; matrix isolation; vibrational spectroscopy; photochemistry
Contributing organizations
Related projects
- Vibrational excitation induced chemistry
- Lundell, Jan
- Research Council of Finland
- Light-induced controlled chemistry of atmospheric complexes
- Lundell, Jan
- Research Council of Finland
Ministry reporting: Yes
VIRTA submission year: 2023
JUFO rating: 1
- Physical Chemistry (Department of Chemistry CHEM) KEF
- Nanoscience Center (Department of Physics PHYS, JYFL) (Faculty of Mathematics and Science) (Department of Chemistry CHEM) (Department of Biological and Environmental Science BIOENV) NSC
- Chemistry (Department of Chemistry CHEM) KEM
- School of Resource Wisdom (University of Jyväskylä JYU) JYU.Wisdom
- Chemistry Education (Department of Chemistry CHEM)