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Fluorescence lifetimes of formaldehyde (H2CO) in the (A)over-tilde(1)A(2) -> (X)over-tilde(1)A(1) band system at elevated temperatures and pressures

Metz, Thomas LU ; Bai, Xiao LU ; Ossler, Frederik LU and Aldén, Marcus LU (2004) In Spectrochimica Acta Part A: Molecular and Biomolecular Spectroscopy 60(5). p.1043-1053
Abstract
Fluorescence lifetimes of formaldehyde excited by picosecond laser radiation with a wavelength of 355 nm were determined in nitrogen gas in a cell using time-resolved laser-induced fluorescence spectroscopy. The measurements were conducted at temperatures between 295 and 770 K and pressures up to 10 bar (1 MPa). Detection was broadband in most cases. Temperature and pressure were found to have a quenching effect on the fluorescence. At 295 K and pressures between 1 and 5 bar, decay rates between 0.03 and 0.04 ns(-1) were observed. At 770 K, the decay rates increased from 0.11 to 0.17 ns(-1) as the pressure was raised from 1 to 10 bar. The dependence on pressure was not linear at 1 bar. At 10 bar the linearity is unclear. The dependence on... (More)
Fluorescence lifetimes of formaldehyde excited by picosecond laser radiation with a wavelength of 355 nm were determined in nitrogen gas in a cell using time-resolved laser-induced fluorescence spectroscopy. The measurements were conducted at temperatures between 295 and 770 K and pressures up to 10 bar (1 MPa). Detection was broadband in most cases. Temperature and pressure were found to have a quenching effect on the fluorescence. At 295 K and pressures between 1 and 5 bar, decay rates between 0.03 and 0.04 ns(-1) were observed. At 770 K, the decay rates increased from 0.11 to 0.17 ns(-1) as the pressure was raised from 1 to 10 bar. The dependence on pressure was not linear at 1 bar. At 10 bar the linearity is unclear. The dependence on temperature appeared to be exponential. (C) 2003 Elsevier B.V. All rights reserved. (Less)
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author
organization
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type
Contribution to journal
publication status
published
subject
keywords
temperature, pressure, quenching, time-resolved, formaldehyde, laser-induced fluorescence
in
Spectrochimica Acta Part A: Molecular and Biomolecular Spectroscopy
volume
60
issue
5
pages
1043 - 1053
publisher
Elsevier
external identifiers
  • wos:000221206300006
  • pmid:15084321
  • scopus:1842853866
ISSN
1386-1425
DOI
10.1016/S1386-1425(03)00335-4
language
English
LU publication?
yes
id
04dc394c-450a-40e4-8666-410693a884e8 (old id 279648)
date added to LUP
2007-10-28 14:55:59
date last changed
2017-07-30 04:42:25
@article{04dc394c-450a-40e4-8666-410693a884e8,
  abstract     = {Fluorescence lifetimes of formaldehyde excited by picosecond laser radiation with a wavelength of 355 nm were determined in nitrogen gas in a cell using time-resolved laser-induced fluorescence spectroscopy. The measurements were conducted at temperatures between 295 and 770 K and pressures up to 10 bar (1 MPa). Detection was broadband in most cases. Temperature and pressure were found to have a quenching effect on the fluorescence. At 295 K and pressures between 1 and 5 bar, decay rates between 0.03 and 0.04 ns(-1) were observed. At 770 K, the decay rates increased from 0.11 to 0.17 ns(-1) as the pressure was raised from 1 to 10 bar. The dependence on pressure was not linear at 1 bar. At 10 bar the linearity is unclear. The dependence on temperature appeared to be exponential. (C) 2003 Elsevier B.V. All rights reserved.},
  author       = {Metz, Thomas and Bai, Xiao and Ossler, Frederik and Aldén, Marcus},
  issn         = {1386-1425},
  keyword      = {temperature,pressure,quenching,time-resolved,formaldehyde,laser-induced fluorescence},
  language     = {eng},
  number       = {5},
  pages        = {1043--1053},
  publisher    = {Elsevier},
  series       = {Spectrochimica Acta Part A: Molecular and Biomolecular Spectroscopy},
  title        = {Fluorescence lifetimes of formaldehyde (H2CO) in the (A)over-tilde(1)A(2) -> (X)over-tilde(1)A(1) band system at elevated temperatures and pressures},
  url          = {http://dx.doi.org/10.1016/S1386-1425(03)00335-4},
  volume       = {60},
  year         = {2004},
}