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Vibrational spectra and theoretical calculations of p-chlorophenol in the electronically excited S1 and ionic ground D0 states

Paper ID Volume ID Publish Year Pages File Format Full-Text
27782 44042 2008 9 PDF Available
Title
Vibrational spectra and theoretical calculations of p-chlorophenol in the electronically excited S1 and ionic ground D0 states
Abstract

With the good mass resolution (m/Δm) of about 650, the 35Cl and 37Cl isotopomers of p-chlorophenol have been separated successfully in our home made time of flight mass spectrometer (TOF-MS). One-color (1C), two-color (2C), resonant two-photon ionization (R2PI), and mass analyzed threshold ionization (MATI) spectra of the both isotopomers have been further recorded. Within the detection limit of our experiment, the band origins of the S1 ← S0 transition and the adiabatic ionization energies (IE) of 35Cl and 37Cl p-chlorophenol are measured to be the same. The band origins of the two isotopic species are determined to be 34813 ± 2 cm−1 by the 1C-R2PI experiment, and the adiabatic IE values are given to be 68094 ± 15 and 68104 ± 5 cm−1 by the 2C-R2PI and MATI methods for the two isotopomers of 35Cl and 37Cl p-chlorophenol. Analysis on the S1 ← S0 transition energy of para substituted phenols suggests that the band origins are all red shifted from phenol regardless of the nature of the substituent, while the inductive effect plays an important role for the D0 ← S1 transition process. The spectral properties of the two isotopomers in the electronically excited S1 and ionic ground D0 states are similar, whereas the vibrational frequencies of some modes are slightly different by a few wavenumbers, displaying the isotope effect.

Keywords
1C-R2PI; 2C-R2PI; MATI; Band origin; IE; Isotope effect
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Vibrational spectra and theoretical calculations of p-chlorophenol in the electronically excited S1 and ionic ground D0 states
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Publisher
Database: Elsevier - ScienceDirect
Journal: Journal of Photochemistry and Photobiology A: Chemistry - Volume 193, Issues 2–3, 25 January 2008, Pages 245–253
Authors
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Subjects
Physical Sciences and Engineering Chemical Engineering Bioengineering
Get Full-Text Now
Don't Miss Today's Special Offer
Price was $35.95
You save - $31
Price after discount Only $4.95
100% Money Back Guarantee
Full-text PDF Download
Online Support
Any Questions? feel free to contact us