Observation of a catalytic proton/hydrogen atom relay in microsolvated 7-azaindole-methanol cluster enhanced by a cooperative motion of the hydrogen-bonded network

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• 作者：Kenji Sakota ; Yusuke Komoto ; Masayuki Nakagaki ; Wataru Ishikawa ; Hiroshi Sekiya
• 刊名：Chemical Physics Letters
• 出版年：2007
• 出版时间：12 February 2007
• 年：2007
• 卷：435
• 期：1-3
• 页码：1-4
• 全文大小：535 K

文摘

A catalytic multiple-proton/hydrogen atom relay in the 7-azaindole-methanol cluster (7AI(MeOH)_n, n = 1–3) has been investigated in the gas phase by measuring the mass-resolved vibronic spectra and the dispersed fluorescence spectra of 7AI(MeOH)_n (n = 1–3). It has been found that the observation of the visible fluorescence due to the multiple-proton/hydrogen atom relay is cluster-size selective; 7AI(MeOH)₂ undergoes an efficient triple-proton/hydrogen atom relay on a ππ^* and/or πσ^* surface. The triple-proton/hydrogen atom relay in this cluster also exhibits prominent vibrational-mode selectivity. The excitation of an intermolecular stretch mode (σ₁) with the in-phase cooperative motion of the whole hydrogen-bond network accelerates the proton/hydrogen atom relay.