Multiphonon up-pumping and molecular hot spots in superheated polymers studied by ultrafast optical calorimetry

Xiaoning Wen; William A. Tolbert; Dana D. Dlott

doi:10.1016/0009-2614(92)85472-M

Multiphonon up-pumping and molecular hot spots in superheated polymers studied by ultrafast optical calorimetry

Xiaoning Wen, William A. Tolbert, Dana D. Dlott

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Abstract

Ultrafast temperature jump experiments (ΔT = 140°C, dT/dt = 10¹² deg/s) are performed on polymers doped with small concentrations of dyes which function as point sources of phonons (molecular heaters) and thermometers. Internal conversion, multiphonon up-pumping and vibrational cooling of dyes in the polymer, occurring on the 0.1 to 100 ps time scale, are investigated.

Original language	English (US)
Pages (from-to)	315-320
Number of pages	6
Journal	Chemical Physics Letters
Volume	192
Issue number	2-3
DOIs	https://doi.org/10.1016/0009-2614(92)85472-M
State	Published - May 1 1992

ASJC Scopus subject areas

General Physics and Astronomy
Physical and Theoretical Chemistry

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10.1016/0009-2614(92)85472-M

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title = "Multiphonon up-pumping and molecular hot spots in superheated polymers studied by ultrafast optical calorimetry",

abstract = "Ultrafast temperature jump experiments (ΔT = 140°C, dT/dt = 1012 deg/s) are performed on polymers doped with small concentrations of dyes which function as point sources of phonons (molecular heaters) and thermometers. Internal conversion, multiphonon up-pumping and vibrational cooling of dyes in the polymer, occurring on the 0.1 to 100 ps time scale, are investigated.",

author = "Xiaoning Wen and Tolbert, {William A.} and Dlott, {Dana D.}",

year = "1992",

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doi = "10.1016/0009-2614(92)85472-M",

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AU - Wen, Xiaoning

AU - Tolbert, William A.

AU - Dlott, Dana D.

PY - 1992/5/1

Y1 - 1992/5/1

N2 - Ultrafast temperature jump experiments (ΔT = 140°C, dT/dt = 1012 deg/s) are performed on polymers doped with small concentrations of dyes which function as point sources of phonons (molecular heaters) and thermometers. Internal conversion, multiphonon up-pumping and vibrational cooling of dyes in the polymer, occurring on the 0.1 to 100 ps time scale, are investigated.

AB - Ultrafast temperature jump experiments (ΔT = 140°C, dT/dt = 1012 deg/s) are performed on polymers doped with small concentrations of dyes which function as point sources of phonons (molecular heaters) and thermometers. Internal conversion, multiphonon up-pumping and vibrational cooling of dyes in the polymer, occurring on the 0.1 to 100 ps time scale, are investigated.

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Multiphonon up-pumping and molecular hot spots in superheated polymers studied by ultrafast optical calorimetry

Abstract

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