Electronic Spectra and Photochemistry of Coordinated Astaxanthin

Horst Kunkely; Arnd Vogler

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Electronic Spectra and Photochemistry of Coordinated Astaxanthin

机译：虾青素的电子光谱和光化学

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Astaxanthin (AXT) is a natural carotenoid which provides colorations to numerous living species such as salmon. Owing to its chelate function deprotonated astaxanthin (axt?) should be easily attached to metal ions. The complex RhIII(phpy)_2(axt) with phpy? = deprotonated 2-phenylpyridine was prepared, and its electronic spectra and photochemistry were examined and compared to that of free AXT. Although different in detail, the spectra and photochemistry of AXT and Rh(phpy)_2(axt) show common features such as fluorescence and photoisomerization of the axt? ligand in ethanol as solvent. In CH_2Cl_2 free AXT as well as the complex undergo photooxidation owing to the reducing property of astaxanthin as an antioxidant.

机译：虾青素（AXT）是一种天然类胡萝卜素，可为鲑鱼等众多生物提供着色。由于其螯合功能，去质子化的虾青素（axt？）应易于与金属离子结合。带phpy的复杂RhIII（phpy）_2（axt）？制备了去质子化的2-苯基吡啶，并检查了其电子光谱和光化学，并与游离AXT进行了比较。尽管在细节上有所不同，但是AXT和Rh（phpy）_2（axt）的光谱和光化学表现出共同的特征，例如荧光和axt？的光异构化。乙醇中的配体作为溶剂。由于虾青素作为抗氧化剂的还原性能，在CH_2Cl_2中游离的AXT以及配合物都会发生光氧化作用。

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《Zeitschrift fur Naturforschung, B. A Journal of Chemical Sciences》 |2011年第8期|共5页
作者
Horst Kunkely; Arnd Vogler;
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正文语种 eng
中图分类化学;
关键词
Electronic Spectra; Luminescence; Photochemistr; Rhodium Complexes; Astaxanthin; Carotenoid;

机译：电子光谱;发光;光化学;铑配合物;虾青素;类胡萝卜素;

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Electronic Spectra and Photochemistry of Coordinated Astaxanthin

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