Ag-DNA@ZIF-8 membrane: A proton conductive photoswitch
Ag-DNA@ZIF-8 membrane: A proton conductive photoswitch
复制标题
Ag-DNA@ZIF-8 膜：质子传导光电开关
DOI：
10.1016/j.apmt.2020.100761
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发表时间：
2020
影响因子：
8.3
通讯作者：
Xinsheng Peng
中科院分区：
文献类型：
--
作者：
Peipei Li;Zhouyi Li;Yi Guo;Zheng Deng;Xiaobin Wang;Xu Ma;Xinsheng Peng
质子传导金属有机框架（M0 F）和质子传导的进一步控制对于诸如传感器和智能设备的高级应用是期望的。在本文中，由银纳米颗粒和单链DNA（Ag-DNA@ZIF-8）共修饰的ZIF-8的膜被设计用于质子传导，其可通过光切换。在Ag-DNA@ZIF-8膜中，光照射可以使质子电导率降低5个数量级。这种减少归因于来自局部表面等离子体共振效应的热量，使水分子脱离DNA@ZIF-8中的原始氢键网络，从而切断质子运输途径。质子传导性是可逆的，因为当光关闭时，水分子可以再次与DNA重新结合。通过光实现高度可切换的质子传导MOFs的方法对于基于MOFs的智能器件的发展是有希望的。
Proton conductive metal-organic frameworks (MOFs) and further control of proton conduction are desired for advanced applications such as sensors and smart devices. Herein, the membrane of ZIF-8 co-modified by sliver nanoparticles and single-strand DNA (Ag-DNA@ZIF-8) is designed for proton conduction, which is switchable by light. In Ag-DNA@ZIF-8 membranes, light illumination can decrease the proton conductivity by 5 orders of magnitude. This decrement attributes to the heat from local surface plasma resonance effect that make water molecules break away from the pristine hydrogen-bonded network in DNA@ZIF-8, thus cutting off the proton transport pathway. The proton conductivity is reversible since when light turn off the water molecules can rebind with DNA again. The method of achieving highly switchable proton conductive MOFs by light is promising for the development of MOFs-based smart devices.