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光化学电荷积累在异体质铜中,通过与质子合的电子转移通过i) - antraquinone 分子二极管
Zhu-Lin Xie1, Nikita Gupta1,2, Jens Niklas1
1Division of Chemical Sciences and Engineering, Argonne National Laboratory USA mulfort@anl.gov.
Chemical science
|September 29, 2023
概括
这项研究引入了一种新的铜复合体,Cu-AnQ,它模仿自然光合作用来储存太阳能. 它使用质子合电子转移 (PCET) 通过吸光来积累两个电子.
科学领域:
- 光催化和太阳能能量转化
- 生物有机化学和光合作用模仿
- 材料科学用于储能储能.
背景情况:
- 高效的多电子氧化还原反应是太阳能转换的关键.
- 模仿自然光合作用,特别是质子合电子转移 (PCET),是光化学电荷积累的一个有前途的策略.
- 开发强大高效的光催化剂对于推进太阳能技术至关重要.
研究的目的:
- 设计和表征一种新的异体感铜 (I) 复合体,Cu-AnQ,用于高效的光化学电荷积累.
- 使用质子合电子转移 (PCET) 调查电子积累的机制.
- 评估Cu-AnQ作为太阳能存储光吸收器的潜力.
主要方法:
- 合成和表征的异构体Cu(I) bis(phenanthroline) 复合体 (Cu-AnQ) 与一个合的phenazine-anthraquinone部分.
- 谱学和电化学分析以确定减少的物种和电子积累.
- 使用牺牲电子捐赠者的连续光解实验和X射线结晶学以确认光产品结构.
- 密度函数理论 (DFT) 计算以检查热力学特性和反应途径.
主要成果:
- 通过PCET,Cu-AnQ通过光化学方法在 antraquinone 单元中积累了两个电子.
- 在氨酸-氨酸系统中,最多可以通过电化学方法积累三个电子.
- 连续光解产生了双重减少的单质子光产物,证实了PCET和两电子积累.
- DFT分析绘制了反应路径和太阳能储能容量.
结论:
- -AnQ作为一种高效的吸光器和电子积累器,证明了PCET用于太阳能储能.
- 该系统利用地球上丰富的过渡金属复合物进行电子存储.
- 电子受体的质子化程度允许调整太阳能储能.
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