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Natural and artificial light-harvesting systems utilizing the functions of carotenoids
Journal of Photochemistry and Photobiology C: Photochemistry Reviews ( IF 13.6 ) Pub Date : 2015-08-05 , DOI: 10.1016/j.jphotochemrev.2015.07.004
Hideki Hashimoto , Yuko Sugai , Chiasa Uragami , Alastair T. Gardiner , Richard J. Cogdell

Carotenoids are essential pigments in natural photosynthesis. They absorb in the blue–green region of the solar spectrum and transfer the absorbed energy to (bacterio-)chlorophylls, and so expand the wavelength range of light that is able to drive photosynthesis. This process is an example of singlet–singlet energy transfer and so carotenoids serve to enhance the overall efficiency of photosynthetic light reactions. Carotenoids also act to protect photosynthetic organisms from the harmful effects of excess exposure to light. In this case, triplet–triplet energy transfer from (bacterio-)chlorophyll to carotenoid plays a key role in this photoprotective reaction. In the light-harvesting pigment–protein complexes from purple photosynthetic bacteria and chlorophytes, carotenoids have an additional role, namely the structural stabilization of those complexes. In this article we review what is currently known about how carotenoids discharge these functions. The molecular architecture of photosynthetic systems will be outlined to provide a basis from which to describe the photochemistry of carotenoids, which underlies most of their important functions in photosynthesis. Then, the possibility to utilize the functions of carotenoids in artificial photosynthetic light-harvesting systems will be discussed. Some examples of the model systems are introduced.



中文翻译:

利用类胡萝卜素功能的天然和人工采光系统

类胡萝卜素是自然光合作用中必不可少的色素。它们吸收太阳光谱的蓝绿色区域,并将吸收的能量转移到(细菌)叶绿素上,因此扩大了能够驱动光合作用的光的波长范围。这个过程是单重态-单态能量转移的一个例子,因此类胡萝卜素有助于提高光合光反应的整体效率。类胡萝卜素还起到保护光合作用生物免受过度暴露于光的有害影响的作用。在这种情况下,三重态-三重态能量从(细菌)叶绿素转移到类胡萝卜素在这种光保护反应中起关键作用。在紫色光合作用细菌和绿藻植物的光吸收色素-蛋白质复合物中,类胡萝卜素还有其他作用,即这些复合物的结构稳定。在本文中,我们回顾了关于类胡萝卜素如何发挥这些功能的已知知识。将概述光合作用系统的分子结构,以提供一个基础来描述类胡萝卜素的光化学,这是它们在光合作用中最重要的功能的基础。然后,将讨论在人造光合光收集系统中利用类胡萝卜素功能的可能性。介绍了模型系统的一些示例。这是它们在光合作用中最重要功能的基础。然后,将讨论在人造光合光收集系统中利用类胡萝卜素功能的可能性。介绍了模型系统的一些示例。这是它们在光合作用中最重要功能的基础。然后,将讨论在人造光合光收集系统中利用类胡萝卜素功能的可能性。介绍了模型系统的一些示例。

更新日期:2015-08-05
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