Observations on the synthesis and spectroscopic characteristics of purpurins
Observations on the synthesis and spectroscopic characteristics of purpurins
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红紫素的合成及光谱特征观察
DOI：
10.1021/jo00358a035
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发表时间：
1986
影响因子：
3.6
通讯作者：
N. C. Tertel
中科院分区：
文献类型：
--
作者：
A. Morgan;N. C. Tertel
可见光谱是卟啉化学中检测大环生色团变化的有力工具，例如，引入能够扩展共轭体系的外围基团（如羰基、乙烯基）。这种变化的结果之一是使卟啉可见光谱中的吸收带I向更高的波长移动。这可以通过观察次卟啉IX二甲酯（1，λ max 621 nm）在引入酰基得到2（4）-单乙酰次卟啉IX二甲酯（2，λ max 634 nm）时的谱带I的红移来说明。2类似地，当由狄尔斯-阿尔德形成的二氢卟酚3
Visible spectroscopy can be a powerful tool in porphyrin chemistry for detecting changes in the chromophore of the macrocycle, brought about, for example, by theintroduc-tion of peripheral groups (eg, carbonyl, vinyl) capable of extending the conjugated system. One of the results of such a change is a shift to higher wavelength of the ab-sorption of band I in the porphyrin visible spectrum. 1 This can be illustrated by observing the bathochromic shift of band I of deuteroporphyrin IX dimethyl ester (1, Xmax 621 nm) on introduction of an acyl group to give 2 (4)-monoacetyldeuteroporphyrin IX dimethyl ester (2, X^ 634 nm). 2 Similarly, when the chlorin 3 formed by Diels-Alder