Time-Resolved Temperature-Jump Infrared Spectroscopy at a High Repetition Rate

Gregory M Greetham; Ian P Clark; Benjamin Young; Robby Fritsch; Lucy Minnes; Neil T Hunt; Mike Towrie

doi:10.1177/0003702820913636

Time-Resolved Temperature-Jump Infrared Spectroscopy at a High Repetition Rate

Gregory M Greetham, Ian P Clark, Benjamin Young, Robby Fritsch, Lucy Minnes, Neil T Hunt, Mike Towrie

Chemistry

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

Abstract

Time-resolved temperature-jump infrared absorption spectroscopy at a 0.5 to 1 kHz repetition rate is presented. A 1 kHz neodymium-doped yttrium aluminum garnet (Nd:YAG) laser pumping an optical parametric oscillator provided >70 µJ, 3.75 µm pump pulses, which delivered a temperature jump via excitation of the O-D stretch of a D2O solution. A 10 kHz train of mid-infrared probe pulses was used to monitor spectral changes following the temperature jump. Calibration with trifluoroacetic acid solution showed that a temperature jump of 10 K lasting for tens of microseconds was achieved, sufficient to observe fast processes in functionally relevant biomolecular mechanisms. Modeling of heating profiles across ≤10 µm path length cells and subsequent cooling dynamics are used to describe the initial <100 ns cooling at the window surface and subsequent, >10 µs cooling dynamics of the bulk solution.

Original language	English
Journal	APPLIED SPECTROSCOPY
DOIs	https://doi.org/10.1177/0003702820913636
Publication status	E-pub ahead of print - 2 Mar 2020

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10.1177/0003702820913636

greetham T-jump paper appl spec 2.2Accepted author manuscript, 660 KB

Cite this

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title = "Time-Resolved Temperature-Jump Infrared Spectroscopy at a High Repetition Rate",

abstract = "Time-resolved temperature-jump infrared absorption spectroscopy at a 0.5 to 1 kHz repetition rate is presented. A 1 kHz neodymium-doped yttrium aluminum garnet (Nd:YAG) laser pumping an optical parametric oscillator provided >70 µJ, 3.75 µm pump pulses, which delivered a temperature jump via excitation of the O-D stretch of a D2O solution. A 10 kHz train of mid-infrared probe pulses was used to monitor spectral changes following the temperature jump. Calibration with trifluoroacetic acid solution showed that a temperature jump of 10 K lasting for tens of microseconds was achieved, sufficient to observe fast processes in functionally relevant biomolecular mechanisms. Modeling of heating profiles across ≤10 µm path length cells and subsequent cooling dynamics are used to describe the initial <100 ns cooling at the window surface and subsequent, >10 µs cooling dynamics of the bulk solution.",

author = "Greetham, {Gregory M} and Clark, {Ian P} and Benjamin Young and Robby Fritsch and Lucy Minnes and Hunt, {Neil T} and Mike Towrie",

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doi = "10.1177/0003702820913636",

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AU - Greetham, Gregory M

AU - Clark, Ian P

AU - Young, Benjamin

AU - Fritsch, Robby

AU - Minnes, Lucy

AU - Hunt, Neil T

AU - Towrie, Mike

PY - 2020/3/2

Y1 - 2020/3/2

N2 - Time-resolved temperature-jump infrared absorption spectroscopy at a 0.5 to 1 kHz repetition rate is presented. A 1 kHz neodymium-doped yttrium aluminum garnet (Nd:YAG) laser pumping an optical parametric oscillator provided >70 µJ, 3.75 µm pump pulses, which delivered a temperature jump via excitation of the O-D stretch of a D2O solution. A 10 kHz train of mid-infrared probe pulses was used to monitor spectral changes following the temperature jump. Calibration with trifluoroacetic acid solution showed that a temperature jump of 10 K lasting for tens of microseconds was achieved, sufficient to observe fast processes in functionally relevant biomolecular mechanisms. Modeling of heating profiles across ≤10 µm path length cells and subsequent cooling dynamics are used to describe the initial <100 ns cooling at the window surface and subsequent, >10 µs cooling dynamics of the bulk solution.

AB - Time-resolved temperature-jump infrared absorption spectroscopy at a 0.5 to 1 kHz repetition rate is presented. A 1 kHz neodymium-doped yttrium aluminum garnet (Nd:YAG) laser pumping an optical parametric oscillator provided >70 µJ, 3.75 µm pump pulses, which delivered a temperature jump via excitation of the O-D stretch of a D2O solution. A 10 kHz train of mid-infrared probe pulses was used to monitor spectral changes following the temperature jump. Calibration with trifluoroacetic acid solution showed that a temperature jump of 10 K lasting for tens of microseconds was achieved, sufficient to observe fast processes in functionally relevant biomolecular mechanisms. Modeling of heating profiles across ≤10 µm path length cells and subsequent cooling dynamics are used to describe the initial <100 ns cooling at the window surface and subsequent, >10 µs cooling dynamics of the bulk solution.

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