Direct Observation of Node-to-Node Communication in Zeolitic Imidazolate Frameworks.
Direct Observation of Node-to-Node Communication in Zeolitic Imidazolate Frameworks.
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DOI：
10.1021/jacs.8b06727
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发表时间：
2018-09
影响因子：
15
通讯作者：
B. Pattengale;Daniel J. SantaLucia;Sizhuo Yang;Wenhui Hu;Cunming Liu;Xiaoyi Zhang;J. Berry;Jier Huang
中科院分区：
文献类型：
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作者：
B. Pattengale;Daniel J. SantaLucia;Sizhuo Yang;Wenhui Hu;Cunming Liu;Xiaoyi Zhang;J. Berry;Jier Huang
具有开壳过渡金属节点的沸石咪唑酯框架（ZIF）代表了一类用于光能应用的有前途的高度有序的光收集天线。然而，它们在框架内的电荷传输特性（实现高效光能转换的关键标准）尚未得到探索。在此，我们结合顺磁化率测量和时间分辨光学和 X 射线吸收光谱，报告了基态和激发态 ZIF 中通过节点到节点通信的电荷传输路径的第一个直接证据。这些发现为 ZIF 框架的光活性和电荷传输性质提供了前所未有的新见解，为其在各种光能转换设备中作为光捕获阵列的新应用铺平了道路。
Zeolitic imidazolate frameworks (ZIFs) with open-shell transition metal nodes represent a promising class of highly ordered light harvesting antennas for photoenergy applications. However, their charge transport properties within the framework, the key criterion to achieve efficient photoenergy conversion, are not yet explored. Herein, we report the first direct evidence of a charge transport pathway through node-to-node communication in both ground state and excited state ZIFs using the combination of paramagnetic susceptibility measurements and time-resolved optical and X-ray absorption spectroscopy. These findings provide unprecedented new insights into the photoactivity and charge transport nature of ZIF frameworks, paving the way for their novel application as light harvesting arrays in diverse photoenergy conversion devices.