Xu Chang, Zhang Wan-Ying, Ye Qiong, Fu Da-Wei
Ordered Matter Science Research Center, Jiangsu Key Laboratory for Science and Applications of Molecular Ferroelectrics, Southeast University , Nanjing 211189, P. R. China.
Inorg Chem. 2017 Dec 4;56(23):14477-14485. doi: 10.1021/acs.inorgchem.7b02055. Epub 2017 Nov 13.
Switchable materials, due to their potential applications in the fields of sensors, photonic devices, digital processing, etc., have been developed drastically. However, they still face great challenges in effectively inducing multiple molecular switching. Herein organic-inorganic hybrid compounds, an emerging class of hydrosoluble optoelectronic-active materials, welcome a new member with smart unique optical/electrical (fluorescence/dielectric) dual switches (switching ON/OFF), that is, [CHNBr][CdBr] (1) in the form of both a bulk crystal and an ultraflexible monodirectional thin film, which simultaneously exhibits fast dielectric/fluorescent dual switching triggered by an optical/thermal/electric signal with a high signal-to-noise ratio of 35 (the highest one in the known optical/dielectric dual molecular switches). Additionally, the exceptional stability/fatigue resistance as well as the fantastic extensibility/compactness of thin films (more than 10000 times folding over 90°), makes 1 an ideal candidate for single-molecule intelligent wearable devices and seamlessly integrated optoelectronic multiswitchable devices. This opens up a new route toward advanced light/electric high-performance switches/memories based on organic-inorganic hybrid compounds.
由于可切换材料在传感器、光子器件、数字处理等领域的潜在应用，其已得到了极大的发展。然而，它们在有效诱导多重分子切换方面仍面临巨大挑战。在此，有机 - 无机杂化化合物作为一类新兴的水溶性光电活性材料，迎来了一个具有智能独特光学/电学（荧光/介电）双开关（开启/关闭）的新成员，即块状晶体和超柔性单向薄膜形式的[CHNBr][CdBr] (1)，其通过光/热/电信号触发，同时呈现快速的介电/荧光双切换，信噪比高达35（在已知的光学/介电双分子开关中最高）。此外，薄膜具有出色的稳定性/抗疲劳性以及优异的可扩展性/致密性（在90°以上可折叠超过10000次），这使得1成为单分子智能可穿戴设备和无缝集成光电多可切换设备的理想候选材料。这为基于有机 - 无机杂化化合物的先进光/电高性能开关/存储器开辟了一条新途径。
