Electronic-to-vibrational energy-transfer studies of singlet molecular oxygen. 1. O2(a1Δg)

J. P. Singh; J. Bachar; D. W. Setser; S. Rosenwaks

doi:10.1021/j100271a008

Electronic-to-vibrational energy-transfer studies of singlet molecular oxygen. 1. O₂(a¹Δ_g)

J. P. Singh
, J. Bachar
, D. W. Setser
, S. Rosenwaks

Department of Physics

Research output: Contribution to journal › Article › peer-review

37 Scopus citations

Abstract

A gas flow reactor was used to measure the total quenching rate constants of O₂(a¹Δ_g) with 26 small molecules at room temperature. With the exception of CF₃NO, which probably quenches by an excitation-transfer mechanism, the electronic-to-vibrational (E-V) energy-transfer rate constants are rather small and fall in the 10^-16-10^-18 cm³ molecule^-1 s^-1 range. Attempts were made to observe the infrared emission from products of the E-V transfer, but conclusive assignment was only possible for the quenching of O₂(a¹Δ_g) by HF. Both HF(v=2) and HF(v=1) seem to be primary products from the HF + O₂(a) reaction.

Original language	English
Pages (from-to)	5347-5353
Number of pages	7
Journal	Journal of Physical Chemistry
Volume	89
Issue number	25
DOIs	https://doi.org/10.1021/j100271a008
State	Published - 1 Jan 1985

ASJC Scopus subject areas

General Engineering
Physical and Theoretical Chemistry

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title = "Electronic-to-vibrational energy-transfer studies of singlet molecular oxygen. 1. O2(a1Δg)",

abstract = "A gas flow reactor was used to measure the total quenching rate constants of O2(a1Δg) with 26 small molecules at room temperature. With the exception of CF3NO, which probably quenches by an excitation-transfer mechanism, the electronic-to-vibrational (E-V) energy-transfer rate constants are rather small and fall in the 10-16-10-18 cm3 molecule-1 s-1 range. Attempts were made to observe the infrared emission from products of the E-V transfer, but conclusive assignment was only possible for the quenching of O2(a1Δg) by HF. Both HF(v=2) and HF(v=1) seem to be primary products from the HF + O2(a) reaction.",

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AU - Singh, J. P.

AU - Bachar, J.

AU - Setser, D. W.

AU - Rosenwaks, S.

PY - 1985/1/1

Y1 - 1985/1/1

N2 - A gas flow reactor was used to measure the total quenching rate constants of O2(a1Δg) with 26 small molecules at room temperature. With the exception of CF3NO, which probably quenches by an excitation-transfer mechanism, the electronic-to-vibrational (E-V) energy-transfer rate constants are rather small and fall in the 10-16-10-18 cm3 molecule-1 s-1 range. Attempts were made to observe the infrared emission from products of the E-V transfer, but conclusive assignment was only possible for the quenching of O2(a1Δg) by HF. Both HF(v=2) and HF(v=1) seem to be primary products from the HF + O2(a) reaction.

AB - A gas flow reactor was used to measure the total quenching rate constants of O2(a1Δg) with 26 small molecules at room temperature. With the exception of CF3NO, which probably quenches by an excitation-transfer mechanism, the electronic-to-vibrational (E-V) energy-transfer rate constants are rather small and fall in the 10-16-10-18 cm3 molecule-1 s-1 range. Attempts were made to observe the infrared emission from products of the E-V transfer, but conclusive assignment was only possible for the quenching of O2(a1Δg) by HF. Both HF(v=2) and HF(v=1) seem to be primary products from the HF + O2(a) reaction.

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JF - Journal of Physical Chemistry

IS - 25

ER -

Electronic-to-vibrational energy-transfer studies of singlet molecular oxygen. 1. O₂(a¹Δ_g)

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