ELECTRONIC-SPECTRA OF JET-COOLED INDOLES - EVIDENCE FOR THE 1LA STATE
ELECTRONIC-SPECTRA OF JET-COOLED INDOLES - EVIDENCE FOR THE 1LA STATE
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DOI：
10.1021/j100290a021
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发表时间：
1987-03-12
影响因子：
--
通讯作者：
WALLACE, SC
中科院分区：
文献类型：
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作者：
HAGER, JW;DEMMER, DR;WALLACE, SC
电子激发态的吲哚和取代吲哚最近吸引了相当大的兴趣，在理解光谱和激发态动力学性质的蛋白质内的α-羟基侧链的背景下。1使用荧光偏振技术的凝聚相研究2表明存在两个重叠的rr。rr* 电子态，指定为 * Lb和 * La。这两种状态的存在的进一步证据已来自溶剂扰动的吸收和发射带位置的研究。3这些研究表明，* La电子态对溶剂极性更为敏感，在极性介质中表现出较大的稳定能。然而，到目前为止，在室温吲哚蒸气的高分辨率吸收光谱4或荧光激发中还没有明确的 * La状态的识别
The electronically excitedstates of indole and substituted indoles have recently attracted considerable interest in the context of understanding the spectral and excited-state dynamical properties of tryptophanyl side chains within proteins. 1 Condensed-phase studies2 using fluorescence polarization techniques have shown the presence of two overlapping rr. rr* electronic states, designated* Lb and'La. Further evidence for the existence of these two states has been derived from studies of solvent perturbations of the absorption and emission band positions. 3 These investigations imply that the* La electronic state is much more sensitive to solvent polarity, exhibiting large stabilization energies in polar media. To date, however, there has been no unambiguous identification of the* La state in either the high-resolution absorption spectrum of room temperature indole vapor4 or fluorescence excitation