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Determine vibrational energy transfer rates and deactivation mechanisms in gaseous deuterium fluoride across temperatures ranging from 198 to 296 K.

August 15, 1976The Journal of Chemical Physics

Low-temperature vibrational relaxation in gaseous deuterium fluoride: Monomer and polymer deactivation effects

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Determine vibrational energy transfer rates and deactivation mechanisms in gaseous deuterium fluoride across temperatures ranging from 198 to 296 K.
Measured vibrational deactivation using laser-excited vibrational fluorescence across temperatures of 198, 209, 232, 264, and 296 K.
Quantified rate constants for HF–DF energy transfer, DF self-quenching, DF–argon collisions, and pure undiluted DF as a function of gas pressure.
Relaxation rates scaled exponentially with DF pressure at 198, 209, and 232 K according to τ⁻¹ = C exp(D P_DF), indicating that higher-order oligomers (n = 4 and 6) dominate collisional quenching.
Room-temperature self-quenching proceeded more slowly in undiluted DF than in DF–argon mixtures, indicating that vibrational and rotational relaxation occur on comparable timescales in pure DF.

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Implication

Experimental study demonstrates polymer-dominated vibrational quenching in low-temperature deuterium fluoride gas, indicating higher-order oligomers drive rapid energy relaxation.

Cite This Study

Hancock et al. (1976) studied this question.

synapsesocial.com/papers/6a8a731e754a5a619a723f04 https://doi.org/10.1063/1.433237

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Implication

Experimental study demonstrates polymer-dominated vibrational quenching in low-temperature deuterium fluoride gas, indicating higher-order oligomers drive rapid energy relaxation.

Low-temperature vibrational relaxation in gaseous deuterium fluoride: Monomer and polymer deactivation effects

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Discussion

Implication

Cite This Study

Low-temperature vibrational relaxation in gaseous deuterium fluoride: Monomer and polymer deactivation effects

Key Points

Discussion

Implication

Cite This Study

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