Tunneling in photochemical solid-state H-transfer.: Temperature dependence of the H-abstraction rate in phenazine-doped fluorene single crystals期刊界 All Journals 搜尽天下杂志传播学术成果专业期刊搜索期刊信息化学术搜索

Tunneling in photochemical solid-state H-transfer.: Temperature dependence of the H-abstraction rate in phenazine-doped fluorene single crystals

Affiliation:	1. University College of Textile Engineering, B Z U, 60800, Multan, Punjab, Pakistan;2. Department of Textile Engineering, University of Engineering & Technology (Faisalabad Campus), Lahore, Punjab, Pakistan;3. Textile Materials Technology Research Group, School of Design, University of Leeds, Leeds, UK;4. Department of Textile Processing, National Textile University Faisalabad, Punjab, Pakistan;1. Department of Chemistry, Kalasalingam University, Krishnankoil, 626 126, Tamilnadu, India;2. Department of Chemical Engineering, National Taiwan University, Taipei, 10617, Taiwan

Abstract:	The reaction rate has been measured in the temperature range 50 <T < 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 temperature-dependent rate and a substantial deuterium effect are demonstrated. Under specific conditions the nuclear motion promoting the reaction can be assigned as a vibrational oscillator with the fundamental energy of 146 cm⁻¹. Problems and possible ways towards final specification of the reaction-promoting nuclear motion are discussed.

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