Thermal energy assisted heavy atom effect: Fluorescence quenching of 9-cyanoanthracene in the supercritical fluid of Xe

Makoto Maeda, Urs Graf, Hiromichi Niikura, Masami Okamoto, Satoshi Hirayama

Research output: Contribution to journalArticle

11 Citations (Scopus)

Abstract

The fluorescence lifetime, Tf, of 9-cyanoanthracene (9CNA) in the supercritical fluid (SF) of Xe (6.8 MPa at 293 K) is found to be 2.39 ± 0.13 ns, which is much shorter than the 17.78 ± 0.43 ns measured in SF of CO2. This large decrease in Tf is interpreted in terms of the vibronic-level-dependent heavy atom effect which is revealed by a comparison of the absorption and fluorescence excitation spectra measured for the 1:1 van der Waals complex of 9CNA with Xe generated in a supersonic jet. The effect of the temperature on Tf observed in Xe is concordant with the vibronic-level-dependent heavy atom effect.

Original languageEnglish
Pages (from-to)175-180
Number of pages6
JournalChemical Physics Letters
Volume257
Issue number1-2
Publication statusPublished - 1996 Jul 19
Externally publishedYes

Fingerprint

Supercritical fluids
supercritical fluids
Thermal energy
thermal energy
Quenching
Fluorescence
quenching
Atoms
fluorescence
atoms
life (durability)
Temperature
excitation
9-cyanoanthracene
temperature

ASJC Scopus subject areas

  • Physical and Theoretical Chemistry
  • Spectroscopy
  • Atomic and Molecular Physics, and Optics

Cite this

Thermal energy assisted heavy atom effect : Fluorescence quenching of 9-cyanoanthracene in the supercritical fluid of Xe. / Maeda, Makoto; Graf, Urs; Niikura, Hiromichi; Okamoto, Masami; Hirayama, Satoshi.

In: Chemical Physics Letters, Vol. 257, No. 1-2, 19.07.1996, p. 175-180.

Research output: Contribution to journalArticle

Maeda, Makoto ; Graf, Urs ; Niikura, Hiromichi ; Okamoto, Masami ; Hirayama, Satoshi. / Thermal energy assisted heavy atom effect : Fluorescence quenching of 9-cyanoanthracene in the supercritical fluid of Xe. In: Chemical Physics Letters. 1996 ; Vol. 257, No. 1-2. pp. 175-180.
@article{ffd8f662bf86401c93c8967f77937935,
title = "Thermal energy assisted heavy atom effect: Fluorescence quenching of 9-cyanoanthracene in the supercritical fluid of Xe",
abstract = "The fluorescence lifetime, Tf, of 9-cyanoanthracene (9CNA) in the supercritical fluid (SF) of Xe (6.8 MPa at 293 K) is found to be 2.39 ± 0.13 ns, which is much shorter than the 17.78 ± 0.43 ns measured in SF of CO2. This large decrease in Tf is interpreted in terms of the vibronic-level-dependent heavy atom effect which is revealed by a comparison of the absorption and fluorescence excitation spectra measured for the 1:1 van der Waals complex of 9CNA with Xe generated in a supersonic jet. The effect of the temperature on Tf observed in Xe is concordant with the vibronic-level-dependent heavy atom effect.",
author = "Makoto Maeda and Urs Graf and Hiromichi Niikura and Masami Okamoto and Satoshi Hirayama",
year = "1996",
month = "7",
day = "19",
language = "English",
volume = "257",
pages = "175--180",
journal = "Chemical Physics Letters",
issn = "0009-2614",
publisher = "Elsevier",
number = "1-2",

}

TY - JOUR

T1 - Thermal energy assisted heavy atom effect

T2 - Fluorescence quenching of 9-cyanoanthracene in the supercritical fluid of Xe

AU - Maeda, Makoto

AU - Graf, Urs

AU - Niikura, Hiromichi

AU - Okamoto, Masami

AU - Hirayama, Satoshi

PY - 1996/7/19

Y1 - 1996/7/19

N2 - The fluorescence lifetime, Tf, of 9-cyanoanthracene (9CNA) in the supercritical fluid (SF) of Xe (6.8 MPa at 293 K) is found to be 2.39 ± 0.13 ns, which is much shorter than the 17.78 ± 0.43 ns measured in SF of CO2. This large decrease in Tf is interpreted in terms of the vibronic-level-dependent heavy atom effect which is revealed by a comparison of the absorption and fluorescence excitation spectra measured for the 1:1 van der Waals complex of 9CNA with Xe generated in a supersonic jet. The effect of the temperature on Tf observed in Xe is concordant with the vibronic-level-dependent heavy atom effect.

AB - The fluorescence lifetime, Tf, of 9-cyanoanthracene (9CNA) in the supercritical fluid (SF) of Xe (6.8 MPa at 293 K) is found to be 2.39 ± 0.13 ns, which is much shorter than the 17.78 ± 0.43 ns measured in SF of CO2. This large decrease in Tf is interpreted in terms of the vibronic-level-dependent heavy atom effect which is revealed by a comparison of the absorption and fluorescence excitation spectra measured for the 1:1 van der Waals complex of 9CNA with Xe generated in a supersonic jet. The effect of the temperature on Tf observed in Xe is concordant with the vibronic-level-dependent heavy atom effect.

UR - http://www.scopus.com/inward/record.url?scp=0030593403&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=0030593403&partnerID=8YFLogxK

M3 - Article

AN - SCOPUS:0030593403

VL - 257

SP - 175

EP - 180

JO - Chemical Physics Letters

JF - Chemical Physics Letters

SN - 0009-2614

IS - 1-2

ER -