水溶液中 Cl(-)盐的最低能量电子跃迁：Cl(-) → (H2O)6 电荷转移跃迁。
Lowest energy electronic transition in aqueous Cl(-) salts: Cl(-) → (H2O)6 charge transfer transition.
机构信息
Department of Chemistry, University of Pittsburgh, Pittsburgh, Pennsylvania 15260, USA.
出版信息
J Phys Chem A. 2011 Sep 1;115(34):9345-8. doi: 10.1021/jp1085729. Epub 2010 Nov 24.
Abstract
We use UV resonance Raman spectroscopy to probe the lowest energy allowed electronic transitions of aqueous solutions containing Cl(-) salts. We show that the waters hydrating the Cl(-) are involved in charge transfer transitions that transfer electron density from Cl(-) to the water molecules. These charge transfer transitions cause significant change in the H-O-H bond angle in the excited state, which results in a strong enhancement of the preresonance Raman intensity of the water bending modes. Our work gives the first insight into the lowest allowed electronic transition of hydrated Cl(-).
摘要
我们使用紫外共振拉曼光谱来探测含有 Cl(-)盐的水溶液中最低能量允许的电子跃迁。我们表明，水合 Cl(-)的水分子参与了电荷转移跃迁，将电子密度从 Cl(-)转移到水分子上。这些电荷转移跃迁导致激发态中 H-O-H 键角发生显著变化，从而导致水弯曲模式的预共振拉曼强度强烈增强。我们的工作首次深入了解了水合 Cl(-)的最低允许电子跃迁。
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