An electron-transfer photochromic metal–organic framework (MOF) compound with a long-lived charge-separated state and high-contrast photoswitchable luminescence
An electron-transfer photochromic metal–organic framework (MOF) compound with a long-lived charge-separated state and high-contrast photoswitchable luminescence
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一种电子转移光致变色金属有机骨架 (MOF) 化合物，具有长寿命的电荷分离态和高对比度光开关发光
DOI：
10.1039/c5ra25707g
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发表时间：
2016-03
期刊：
影响因子：
--
通讯作者：
Guo-Cong Guo
中科院分区：
文献类型：
--
作者：
Xiu-Shuang Xing;Zi-Wei Chen;Li-Zhen Cai;Cai Sun;Lin-Rong Cai;Ming-Sheng Wang;Guo-Cong Guo
长寿命的电荷分离态和可光开关的光致发光对于许多光化学和光物理应用具有重要意义。最近的研究已经证明了MOF在实现长寿命电荷分离态方面的有效性；然而，由于光响应性MOF的数量有限，相关的研究仍然相当少见。在这项工作中，一种新的电子转移光致变色MOF化合物，包裹了光活性紫精阳离子，表现出电荷分离状态，寿命值超过2个月，超过了报道的类似物的值。此外，光致变色过程可以在两个稳定状态之间提供高达10倍的发光对比度，这比大多数已知的吡啶类光致变色化合物的对比度都要高。
Long-lived charge-separated states and photoswitchable photoluminescence are important for many photochemical and photophysical applications. Recent studies have demonstrated the effectiveness of MOFs to achieve long-lived charge-separated states; however, the related studies are still rather rare owing to the limited numbers of photoresponsive MOFs. In this work, a new electron-transfer photochromic MOF compound, encapsulating photoactive viologen cations, was found to exhibit a charge-separated state with a lifetime value of more than 2 months, exceeding the reported values of the analogues. In addition, the photochromic process can afford a luminescence contrast up to 10 times between two stable states, which is higher than those of most known pyridine derivative-based photochromic compounds.
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