Chemical sensing in two dimensional porous covalent organic nanosheets.
Chemical sensing in two dimensional porous covalent organic nanosheets.
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DOI：
10.1039/c5sc00512d
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发表时间：
2015-07-01
期刊：
影响因子：
8.4
通讯作者：
Banerjee R
中科院分区：
文献类型：
--
作者：
Das G;Biswal BP;Kandambeth S;Venkatesh V;Kaur G;Addicoat M;Heine T;Verma S;Banerjee R
从酰亚胺官能化的COF合成共价有机纳米片（CON）。TfpBDH-CON在固态下对2，4，6-三硝基苯酚表现出"开启"检测能力，但在分散状态下表现出"关闭"检测。采用溶剂热结晶法成功地合成了两种新型的酰亚胺基共价有机骨架（COFs）（TpBDH和TfpBDH）。此外，薄层共价有机纳米片（CON）来自这些散装COFs通过简单的液相剥离法。这些2D CON与其本体对应物（COF）相比显示出增加的发光强度。值得注意的是，TfpBDH-CONs显示出良好的选择性和突出的，直接的视觉检测对不同的硝基芳香分析物超过TpBDH-CONs。非常有趣的是，TfpBDH-CONs表现出优越的"打开"检测能力的2，4，6-三硝基苯酚（TNP）在固态，但相反，他们也显示出"关闭"检测在分散状态。这些发现描述了一种新的方法，朝着发展一种有效的，有前途的荧光化学传感器材料的视觉和光谱检测硝基芳香族化合物与非常低的[10 - 5（M）]分析物浓度。
Covalent organic nanosheets (CONs) were synthesised from imide functionalised COFs. TfpBDH-CONs exhibit a "turn-on" detection capability for 2,4,6-trinitrophenol in the solid state, but show a "turn-off" detection in the dispersion state. Two new imide-based crystalline, porous, and chemically stable covalent organic frameworks (COFs) (TpBDH and TfpBDH) have been successfully synthesized employing solvothermal crystallization route. Furthermore, thin layered covalent organic nanosheets (CONs) were derived from these bulk COFs by the simple liquid phase exfoliation method. These 2D CONs showcase increased luminescence intensity compared to their bulk counterparts (COFs). Notably, TfpBDH-CONs showcase good selectivity and prominent, direct visual detection towards different nitroaromatic analytes over TpBDH-CONs. Quite interestingly, TfpBDH-CONs exhibit a superior “turn-on” detection capability for 2,4,6-trinitrophenol (TNP) in the solid state, but conversely, they also show a “turn-off” detection in the dispersion state. These findings describe a new approach towards developing an efficient, promising fluorescence chemosensor material for both visual and spectroscopic detection of nitroaromatic compounds with very low [10–5 (M)] analyte concentrations.
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影响因子：
15
作者：
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通讯作者：
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作者：
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通讯作者：
Frauenheim, Th.