Photoelectrochemical Communication between Thylakoid Membranes and Gold Electrodes through Different Quinone Derivatives
Photoelectrochemical Communication between Thylakoid Membranes and Gold Electrodes through Different Quinone Derivatives
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DOI：
10.1002/celc.201300148
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发表时间：
2014-01-03
期刊：
影响因子：
4
通讯作者：
Gorton, Lo
中科院分区：
文献类型：
--
作者：
Hasan, Kamrul;Dilgin, Yusuf;Gorton, Lo
光合作用是将光能转化为化学能的可持续过程。能量转换光合膜中的类囊体由于其独特的结构和组成而在生物膜中是独特的。类囊体膜的量子捕获效率在光生物电化学研究中具有重要意义。在这项研究中，从菠菜中提取的类囊体膜被证明是通过一系列醌衍生物与金纳米粒子修饰的固体金电极（AuNP-Au）通信。其中，对苯醌（PBQ）被认为是最好的可溶性电子转移介体，产生最高的光电流约130 μ Acm（-2）从水的氧化在光照下。此外，研究了光电流密度随外加电位、光强、醌浓度和类囊体膜量的变化。最后，通过使用3-（3，4-二氯苯基）-1，1-二甲基脲（其商品名为敌草隆（Diuron））（光系统II的抑制剂）来确认光电流的来源，其使总光电流降低50%。
Photosynthesis is a sustainable process for the conversion of light energy into chemical energy. Thylakoids in energy-transducing photosynthetic membranes are unique in biological membranes because of their distinguished structure and composition. The quantum trapping efficiency of thylakoid membranes is appealing in photobioelectrochemical research. In this study, thylakoid membranes extracted from spinach are shown to communicate with a gold-nanoparticle-modified solid gold electrode (AuNP-Au) through a series of quinone derivatives. Among these, para-benzoquinone (PBQ) is found to be the best soluble electron-transfer mediator, generating the highest photocurrent of approximately 130 mu Acm(-2) from water oxidation under illumination. In addition, the photocurrent density is investigated as a function of applied potential, the effect of light intensity, quinone concentration, and amount of thylakoid membrane. Finally, the source of photocurrent is confirmed by using 3-(3,4-dichlorophenyl)-1,1-dimethylurea (known by its trade name, Diuron), an inhibitor of photosystem II, which decreases the total photocurrent by 50%.