University of Illinois Urbana-Champaign

LIF study for the vibronic structure of para-fluorophenol...ammonia binary complex

Biswas, Souvick

Content Files
1383223.pptx
3769.pdf

Permalink

https://hdl.handle.net/2142/104238

Description

Title
LIF study for the vibronic structure of para-fluorophenol...ammonia binary complex
Author(s)
Biswas, Souvick
Contributor(s)
Chakraborty, Tapas
Issue Date
2019-06-19
Keyword(s)
Non-covalent interactions
Date of Ingest
  • 2019-07-15T22:16:27Z
  • 2020-01-25T19:29:45Z
Abstract
Laser-induced fluorescence excitation (LIFE) and dispersed fluorescence spectra of a binary complex between p-fluorophenol (pFP) and ammonia (\chem{NH_3}) have been measured in a supersonic jet expansion. The measured spectra reveal that para fluorine substitution, which is remote from the binding phenolic site, has a very pronounced effect on the intermolecular vibrational features that appear in the LIFE spectrum. These features also differ significantly compared to those of the 1:1 pFP-\chem{H_2O} complex [1]. The most intense low-frequency feature is the fundamental of the intermolecular stretching mode ($\sigma$), which displays a long progression in the DF spectrum implying occurrence of significant distortion of geometry upon electronic excitation of the complex. In addition, the DF spectra display features of very low threshold for vibrational mixing in the excited state [2]. However, no direct evidence for proton/hydrogen transfer is revealed for vibronic excitation of the complex up to 1$^{1}$ level (822 \wn) of the p-FP moiety. [1] D.P. Mukhopadhyay, S. Biswas, T. Chakraborty, J. Phys. Chem. A 120 (2016) 9159. [2] D.P. Mukhopadhyay, S. Biswas, T. Chakraborty, Chem. Phys. Lett. 674 (2017) 71.
Publisher
International Symposium on Molecular Spectroscopy
Type of Resource
text
Genre of Resource
Conference Paper / Presentation
Language
eng
Permalink
http://hdl.handle.net/2142/104238
DOI
https://doi.org/10.15278/isms.2019.WB08
Copyright and License Information
Copyright 2019 Souvick Biswas

Owning Collections

Abstracts & Presentations - 2019 International Symposium on Molecular Spectroscopy PRIMARY