以2,4,6-三甲基均三嗪和甲酰基咔唑、二甲酰基咔唑为原料,通过羟醛缩合反应合成了化合物Ⅰ及超支化荧光共轭聚合物Ⅱ,其中Ⅰ可以视为Ⅱ的组成单体.聚合物Ⅱ在常见有机溶剂中有较好的溶解度,其X射线衍射谱图中2θ=24.2°的位置有1个较宽的峰;其吸收和荧光光谱与Ⅰ的相比仅有轻微红移(3 nm),这些结果都说明聚合物Ⅱ分子间没有紧密的π-π堆积作用.聚合物Ⅱ的荧光强度是化合物Ⅰ的2倍.2,4-二硝基甲苯对其荧光猝灭研究结果表明,超支化聚合物Ⅱ具有比化合物Ⅰ更大的荧光猝灭常数(Ksv=95.52 L/mol),表现出了一定的分子导线效应.
参考文献
[1] | Qin Zhou;Timothy M. Swager .Methodology for Enhancing the Sensitivity of Fluorescent Chemosensors: Energy Migration in Conjugated Polymers[J].Journal of the American Chemical Society,1995(26):7017-7018. |
[2] | Samuel W.Thomas III;Guy D.Joly;Timothy M.Swager .Chemical Sensors Based on Amplifying Fluorescent Conjugated Polymers[J].Chemical Reviews,2007(4):1339-1386. |
[3] | Bijitha Balan;Chakkooth Vijayakumar;Masashi Tsuji .Detection and Distinction of DNT and TNT with a Fluorescent Conjugated Polymer Using the Microwave Conductivity Technique[J].The journal of physical chemistry, B. Condensed matter, materials, surfaces, interfaces & biophysical,2012(34):10371-10378. |
[4] | Nie, H.;Zhao, Y.;Zhang, M.;Ma, Y.;Baumgarten, M.;Müllen, K. .Detection of TNT explosives with a new fluorescent conjugated polycarbazole polymer[J].Chemical communications,2011(4):1234-1236. |
[5] | Xu, B.;Wu, X.;Li, H.;Tong, H.;Wang, L. .Selective detection of TNT and picric acid by conjugated polymer film sensors with donor-acceptor architecture[J].Macromolecules,2011(13):5089-5092. |
[6] | Guoqiang Tang;Simon S. Y. Chen;Paul E. Shaw .Fluorescent carbazole dendrimers for the detection of explosives[J].Polymer chemistry,2011(10):2360-2368. |
[7] | Yang JS.;Swager TM. .Fluorescent porous polymer films as TNT chemosensors: Electronic and structural effects[J].Journal of the American Chemical Society,1998(46):11864-11873. |
[8] | Cui YZ.;Fang Q.;Lei H.;Xue G.;Yu WT. .Syntheses, structures and second-order nonlinear optical properties of octupolar compounds: 2,4,6-tri-substituted s-triazine[J].Chemical Physics Letters,2003(5-6):507-511. |
上一张
下一张
上一张
下一张
计量
- 下载量()
- 访问量()
文章评分
- 您的评分:
-
10%
-
20%
-
30%
-
40%
-
50%