Fluorescent conjugated polycarbazoles for explosives detection: Side chain effects on TNT sensor sensitivity
Fluorescent conjugated polycarbazoles for explosives detection: Side chain effects on TNT sensor sensitivity
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用于爆炸物检测的荧光共轭聚咔唑：侧链对 TNT 传感器灵敏度的影响
DOI：
10.1039/c1jm14691b
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发表时间：
2012-01-01
影响因子：
--
通讯作者：
Muellen, Klaus
中科院分区：
文献类型：
--
作者：
Nie, Heran;Sun, Guannan;Muellen, Klaus
考虑到荧光聚合物与TNT之间的电子和结构相互作用，我们设计并合成了两种咔唑基聚合物（P1和P2），分别以2-乙基己基和4-[三-（4-辛氧基苯基）甲基]苯基为侧链。不同的侧链导致聚合物传感行为的显著差异。它表明，大的和更刚性的侧链可以减少在固态聚合物链之间的相互作用，同时支持通过更容易进入的空间的爆炸物的扩散，从而有助于敏感性。此外，我们已经证明，庞大的侧链显然不会影响主链的构象，这是必要的共轭聚合物作为荧光传感材料。研究结果表明，P2是一种很有前途的TNT检测材料，具有显著的灵敏度，并为TNT传感材料的设计提供了一种新的思路。
Considering electronic and structural interactions between fluorescent polymers and TNT, we have designed and synthesized two carbazole-based polymers (P1 and P2), possessing 2-ethylhexyl and 4-[tris-(4-octyloxyphenyl)methyl]phenyl as side chains, respectively. The distinct side chains cause dramatic differences in the polymer sensing behavior. It is demonstrated that large and more rigid side chains could reduce the interactions between polymer chains in the solid state, while supporting the diffusion of explosives through more accessible space, thereby contributing to the sensitivity. Furthermore, we have proved that bulky side chains obviously did not influence the conformation of the backbone, which is necessary for the conjugated polymers to act as fluorescent sensing material. The results suggest that P2 is a promising material for TNT detection with pronounced sensitivity, in addition they provide a new design-thought for TNT sensing materials.