Enhanced and Optically Switchable Proton Conductivity in a Melting Coordination Polymer Crystal
Enhanced and Optically Switchable Proton Conductivity in a Melting Coordination Polymer Crystal
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DOI：
10.1002/anie.201700962
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发表时间：
2017-04-24
影响因子：
16.6
通讯作者：
Kitagawa, Susumu
中科院分区：
文献类型：
--
作者：
Nagarkar, Sanjog S.;Horike, Satoshi;Kitagawa, Susumu
利用配位聚合物(CP)晶体的熔融行为，在固态下实现了增强的和光学可切换的质子电导。在熔融状态下，将强酸分子(三氟酸)掺杂到一维CP[Zn(HPO4)(HPO4)(H2PO4)(2)](imH(2))(2)(imH(2)=单质子化的咪唑)中，得到了质子电导率的整体增强。质子导电性的增强归因于酸掺杂增加了可移动质子的数量和缺陷。通过将光酸分子吡喃掺杂到熔融的CP中，实现了对CP中质子导电性的光学控制。吡喃在Cp的玻璃态中可逆地产生可移动的酸性质子和局域缺陷，从而导致在光照射下的体相可切换电导。液态CP晶体的利用为引入功能分子和缺陷提供了一种新的途径，并为控制CP材料的整体性质提供了工具。
The melting behavior of a coordination polymer (CP) crystal was utilized to achieve enhanced and optically switchable proton conductivity in the solid state. The strong acid molecules (triflic acid) were doped in one-dimensional (1D) CP, [Zn(HPO4)(H2PO4)(2)](ImH(2))(2) (ImH(2) = monoprotonated imidazole) in the melt state, and overall enhancement in the proton conductivity was obtained. The enhanced proton conductivity is assigned to increased number of mobile protons and defects created by acid doping. Optical control over proton conductivity in the CP is achieved by doping of the photo acid molecule pyranine into the melted CP. The pyranine reversibly generates the mobile acidic protons and local defects in the glassy state of CP resulting in the bulk switchable conductivity mediated by light irradiation. Utilization of CP crystal in liquid state enables to be a novel route to incorporate functional molecules and defects, and it provides a tool to control the bulk properties of the CP material.