The reaction rate has been measured in the temperature range 50 < 7'~ 300 K for photochemical H-abstraction by phenazine in its excited triplet state doped in fluorene single crystals. Typical features for a tunneling process like the approach to a constant low-temperature rate, a non-Arrhenius temp
Pressure dependence of the low-temperature tunneling rate for the hydrogen transfer in acridine-doped fluorene crystals
โ Scribed by I.Y. Chan; Chung M. Wong; D. Stehlik
- Publisher
- Elsevier Science
- Year
- 1994
- Tongue
- English
- Weight
- 783 KB
- Volume
- 219
- Category
- Article
- ISSN
- 0009-2614
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โฆ Synopsis
Pressure dependence of the tunneling rate for the hydrogen transfer photoreaction in acridine: fluorene was investigated at 1.4 K. Above 10 kbar, the rate rises exponentially with increasing pressure. These data constitute a measurement of tunneling rate from the vibrational ground state. Its physical implications are discussed.
๐ SIMILAR VOLUMES
Rate constants for the tunneling reaction, HD + D ~ H + D 2, in solid HD have been determined by using ESR in the very low temperature range of 2.6-6.5 K. The rate constants increase steeply with increasing temperature above 5 K, while they are almost independent of temperature below 5 K. The result