Ultrathin two-dimensional porous organic nanosheets with molecular rotors for chemical sensing.
Ultrathin two-dimensional porous organic nanosheets with molecular rotors for chemical sensing.
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DOI：
10.1038/s41467-017-01293-x
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发表时间：
2017-10-26
影响因子：
16.6
通讯作者：
Zhao D
中科院分区：
文献类型：
--
作者：
Dong J;Zhang K;Li X;Qian Y;Zhu H;Yuan D;Xu QH;Jiang J;Zhao D
分子转子在现代材料化学中起着重要的作用。虽然已经报道了关于含有分子转子的功能材料用于荧光传感的一些研究，但是这个概念还没有在二维（2D）材料中实现。在这里，我们报告的制备全碳，π共轭二维多孔有机纳米片，命名为NUS-24，它包含灵活的四苯乙烯（TPE）单元作为分子转子。NUS-24纳米片表现出高稳定性、大横向尺寸和纳米厚度（2-5 nm）。暴露在NUS-24纳米片表面上的动态TPE转子可以被限制在具有不同水分数的聚集状态，这让人想起聚集诱导的发射机制，从而导致挥发性有机化合物的尺寸选择性开启荧光。值得注意的是，该纳米片及其复合膜对Fe 3+离子和含硝基化合物的传感表现出更高的灵敏度和选择性，这表明它们在爆炸物检测和环境监测中具有潜在的应用前景。在限制时发荧光的分子转子是功能材料中有用的组分。在这里，作者将分子转子结合到2D多孔有机纳米片中，为挥发性有机化合物和金属离子创造了灵敏和选择性的荧光传感器。
Molecular rotors have played an important role in recent materials chemistry. Although several studies on functional materials containing molecular rotors have been reported for fluorescence sensing, this concept has yet to be realized in two-dimensional (2D) materials. Here we report the preparation of all-carbon, π-conjugated 2D porous organic nanosheets, named NUS-24, which contain flexible tetraphenylethylene (TPE) units as the molecular rotors. NUS-24 nanosheets exhibit high stability, large lateral size, and ultrathin thickness (2–5 nm). The dynamic TPE rotors exposed on the surface of NUS-24 nanosheets can be restricted in the aggregated state with different water fractions, which is reminiscent of the aggregation-induced emission mechanism, thereby leading to the size-selective turn-on fluorescence by volatile organic compounds. Significantly, the ultrathin 2D nanosheets and its composite membranes show much higher sensitivity and selectivity toward Fe3+ ions and nitro-containing compounds sensing, suggesting their potential applications in explosive detection and environmental monitoring. Molecular rotors that fluoresce upon restriction are useful components in functional materials. Here, the authors incorporate molecular rotors into 2D porous organic nanosheets, creating sensitive and selective fluorescent sensors for volatile organic compounds and metal ions.
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影响因子：
5.7
作者：
Crowley, Jason M.;Tahir-Kheli, Jamil;Goddard, William A., III
通讯作者：
Goddard, William A., III
影响因子：
15
作者：
Chen, Zongping;Wang, Hai I.;Muellen, Klaus
通讯作者：
Muellen, Klaus
影响因子：
15
作者：
Chandra, Suman;Kandambeth, Sharath;Banerjee, Rahul
通讯作者：
Banerjee, Rahul
影响因子：
4.4
作者：
BECKE, AD
通讯作者：
BECKE, AD
DOI：
10.1002/anie.201700271
发表时间：
2017-06-06
期刊：
Angewandte Chemie (International ed. in English)
影响因子：
--
作者：
Marco AB;Cortizo-Lacalle D;Perez-Miqueo I;Valenti G;Boni A;Plas J;Strutyński K;De Feyter S;Paolucci F;Montes M;Khlobystov AN;Melle-Franco M;Mateo-Alonso A
通讯作者：
Mateo-Alonso A