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Water-dispersible hyperbranched conjugated polymer nanoparticles with sulfonate terminal groups for amplified fluorescence sensing of trace TNT in aqueous solution†
Materials Chemistry Frontiers ( IF 6.0 ) Pub Date : 2017-05-18 00:00:00 , DOI: 10.1039/c7qm00173h Xiaofu Wu 1, 2, 3, 4, 5 , Hao Hang 5, 6, 7 , Hua Li 5, 6, 7 , Yonghong Chen 5, 6, 7 , Hui Tong 1, 2, 3, 4, 5 , Lixiang Wang 1, 2, 3, 4, 5
Materials Chemistry Frontiers ( IF 6.0 ) Pub Date : 2017-05-18 00:00:00 , DOI: 10.1039/c7qm00173h Xiaofu Wu 1, 2, 3, 4, 5 , Hao Hang 5, 6, 7 , Hua Li 5, 6, 7 , Yonghong Chen 5, 6, 7 , Hui Tong 1, 2, 3, 4, 5 , Lixiang Wang 1, 2, 3, 4, 5
Affiliation
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Conjugated polymers (CPs) have been recognized as promising fluorescent sensing materials for 2,4,6-trinitrotoluene (TNT) vapor. However, their applications for TNT detection in aqueous solution are restricted because of their low sensitivity (detection limits >90 nM). Here we report highly sensitive detection of TNT by water-dispersible hyperbranched conjugated polymer nanoparticles (HCPN-S) with hydrophobic CP cores and hydrophilic sulfonate terminal groups. Based on efficient TNT encapsulation by numerous hydrophobic cavities inside the hyperbranched CP core, HCPN-S exhibits a quenching constant of 1.21 × 106 M−1, two to three orders of magnitude higher than those of CP analogues, allowing amplified detection of TNT with a detection limit of 0.8 ppb (3.7 nM), which is the best result for CP-based fluorescent sensors for TNT detection in water reported so far. Furthermore, HCPN-S can selectively detect TNT even in the presence of 2,4,6-trinitrophenol and other nitro compounds.
中文翻译：
具有磺酸根端基的水分散性超支化共轭聚合物纳米粒子，用于水溶液中痕量TNT的荧光放大传感†
共轭聚合物（CPs）已被公认为是用于2,4,6-三硝基甲苯（TNT）蒸气的有前途的荧光传感材料。但是，由于它们的低灵敏度（检测极限> 90 nM），它们在水溶液中TNT检测中的应用受到限制。在这里，我们报告通过具有疏水性CP核和亲水性磺酸盐端基的水分散性超支化共轭聚合物纳米颗粒（HCPN-S）对TNT进行高灵敏度检测。基于超支化CP核内部大量疏水腔的有效TNT封装，HCPN-S的淬灭常数为1.21×10 6 M -1，比CP类似物高出2到3个数量级，从而可以对TNT进行放大检测，检测限为0.8 ppb（3.7 nM），这是迄今为止报道的用于水中TNT检测的基于CP的荧光传感器的最佳结果。此外，HCPN-S甚至在存在2,4,6-三硝基苯酚和其他硝基化合物的情况下也可以选择性地检测TNT。
更新日期：2017-05-18
中文翻译：
具有磺酸根端基的水分散性超支化共轭聚合物纳米粒子，用于水溶液中痕量TNT的荧光放大传感†
共轭聚合物（CPs）已被公认为是用于2,4,6-三硝基甲苯（TNT）蒸气的有前途的荧光传感材料。但是，由于它们的低灵敏度（检测极限> 90 nM），它们在水溶液中TNT检测中的应用受到限制。在这里，我们报告通过具有疏水性CP核和亲水性磺酸盐端基的水分散性超支化共轭聚合物纳米颗粒（HCPN-S）对TNT进行高灵敏度检测。基于超支化CP核内部大量疏水腔的有效TNT封装，HCPN-S的淬灭常数为1.21×10 6 M -1，比CP类似物高出2到3个数量级，从而可以对TNT进行放大检测，检测限为0.8 ppb（3.7 nM），这是迄今为止报道的用于水中TNT检测的基于CP的荧光传感器的最佳结果。此外，HCPN-S甚至在存在2,4,6-三硝基苯酚和其他硝基化合物的情况下也可以选择性地检测TNT。
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