Fluorescence spectra of some retinyl polyenes.
Fluorescence spectra of some retinyl polyenes.
复制标题
一些视黄基多烯的荧光光谱。
DOI：
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发表时间：
1969
影响因子：
4.4
通讯作者：
A. Thomson
中科院分区：
文献类型：
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作者：
A. Thomson
测定了两个系列的视黄基多烯的荧光光谱和吸收光谱。一个系列由具有不同端基的视黄基碳部分组成，这些端基是醇、乙酸酯、酸、肟和甲胺。第二组包括视黄醇（维生素A）的反式、11-顺式、13-顺式和9-顺式立体异构体。第一系列的光谱已在室温和77°K下在烃和甲醇溶剂中测量。乙酸盐和酸也被研究为晶体。在简单的势能图中讨论了吸收光谱和荧光光谱的相对形状和重叠程度。它示出的频带是严重的Franck-Condon禁止两个计数;第一，凭借在基态的键交替，导致一个总的变化的几何结构的核框架上的激发，第二，从位阻发生在不同的点在视黄基碳框架。这里报告的光谱显示了...
The fluorescence and absorption spectra of two series of retinyl1 polyenes have been measured. One series consists of the retinyl–carbon moiety with different end groups, these being the alcohol, acetate, acid, oxime, and methyl‐amine. The second group comprises the trans, 11‐cis, 13‐cis, and 9‐cis stereoisomers of retinol (vitamin A). The spectra of the first series have been measured at room temperature and 77°K in both hydrocarbon and methanol solvents. The acetate and acid have also been studied as crystals. The relative shapes and the degree of overlap of the absorption and fluorescence spectra are discussed in terms of simple potential‐energy diagrams. It is shown that the bands are severely Franck–Condon forbidden on two counts; first, by virtue of the bond alternation in the ground state that leads to a gross change in geometry of the nuclear framework on excitation, and second, from steric hindrance that occurs at various points in the retinyl–carbon framework. The spectra reported here show how ...