二维有机金属晶体中局域激子的振动指纹

2019/03/06   下载量: 0

方案摘要

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应用领域 石油/化工
检测样本 其他
检测项目 理化分析
参考标准 暂无

该应用2018年在自然杂志上作为研究通信被报道过。采用时间分辨泵浦探针光谱学和Ekspla公司的振动和频光谱测量系统,对二维有机金属晶体中局域激子的振动指纹进行了实验研究。

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Long-lived excitons formed upon visible light absorption play an essential role in photovoltaics,photocatalysis, and even in high-density information storage. Here, we describe a self-assembled two-dimensional metal-organic crystal, composed of graphene-supported
macrocycles, each hosting a single FeN4 center, where a single carbon monoxide molecule
can adsorb. In this heme-like biomimetic model system, excitons are generated by visible
laser light upon a spin transition associated with the layer 2D crystallinity, and are simultaneously detected via the carbon monoxide ligand stretching mode at room temperature and near-ambient pressure. The proposed mechanism is supported by the results of infrared and time-resolved pump-probe spectroscopies, and by ab initio theoretical methods, opening a path towards the handling of exciton dynamics on 2D biomimetic crystals.

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