Gas detection by structural variations of fluorescent guest molecules in a flexible porous coordination polymer
Gas detection by structural variations of fluorescent guest molecules in a flexible porous coordination polymer
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DOI：
10.1038/nmat3104
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发表时间：
2011-10-01
期刊：
影响因子：
41.2
通讯作者：
Kitagawa, Susumu
中科院分区：
文献类型：
--
作者：
Yanai, Nobuhiro;Kitayama, Koji;Kitagawa, Susumu
开发一种用于气体可视化和检测的新方法对于各种应用至关重要。在此，我们报道了一种新策略，即通过一种报告客体发出的信号来检测气体分子，该报告客体能够读出主体结构的转变。一种柔性多孔配位聚合物与荧光报告分子二苯乙烯基苯（DSB）的复合物能选择性地吸附二氧化碳，而不吸附其他大气气体。这种吸附诱导了主体的转变，同时伴随着所包含的DSB的构象变化。这种读出过程导致在特定阈值压力下DSB荧光发生关键变化。该复合物对二氧化碳和乙炔（具有相似物理化学性质的化合物）表现出不同的荧光响应。我们的系统首次表明，荧光分子能够在没有任何化学相互作用或能量转移的情况下检测气体。主 - 客耦合转变在将气体吸附事件转化为可检测的输出信号方面起着关键作用。
The development of a new methodology for visualizing and detecting gases is imperative for various applications. Here, we report a novel strategy in which gas molecules are detected by signals from a reporter guest that can read out a host structural transformation. A composite between a flexible porous coordination polymer and fluorescent reporter distyrylbenzene ( DSB) selectively adsorbed CO2 over other atmospheric gases. This adsorption induced a host transformation, which was accompanied by conformational variations of the included DSB. This read-out process resulted in a critical change in DSB fluorescence at a specific threshold pressure. The composite shows different fluorescence responses to CO2 and acetylene, compounds that have similar physicochemical properties. Our system showed, for the first time, that fluorescent molecules can detect gases without any chemical interaction or energy transfer. The host-guest coupled transformations play a pivotal role in converting the gas adsorption events into detectable output signals.