含硫脲聚乙炔的合成与氟离子识别特性

Synthesis and Fluoride Ions Recognition properity of Thiourea-containing Polyacetylene

设计合成了一种新颖的含硫脲的乙炔,1-(4-乙炔苯基)-3-(4-丁基苯)硫脲(1),并采用有机铑作为催化剂对其进行聚合。通过一系列阴离子的正四丁基铵盐的DMF溶液来评价聚合物的阴离子识别性能。加入F–后,poly(1)的DMF溶液颜色立即改变;而加入Cl–,HSO4–,Br–,NO3–,C6H5COO–和CH3COO–后,溶液颜色不变,说明poly(1)对F–具有裸眼识别能力。紫外吸收滴定光谱和Hill曲线分析确定F–的结合能力,poly(1)/F–配合的Hill系数为1.6,表观结合常数(Ka)高达1.35×104,这说明poly(1)/F–形成了稳定的配合物。

A novel acetylene carrying thiourea groups, 1-（4-ethynylphenyl）-3-（4-butylphenyl） thiourea （1） was synthesized and polymerized with rhodium catalyst. The anion sensing ability of poly （1） was estimated using the tetra-n-butylammonium （TBA） salts of a series of anions in DMF. Upon the addition of F-, the color of the DMF solution of poly （1） immediately turned to a different color while the color of solution change slightly upon addition of C I , HSO4-, Br, and NO3 , indicating that poly （1） exhibits F- naked-eyes sensing ability. The absorption spectra titration and Hill plot analysis were carried out to measure the F- binding ability, and found that the Hill coefficient in the poly （1）/F complexation was 1.6, the apparent binding constant （Ka） was high up to 1.35× 10^4. This result indicated that it fort-ned a stable poly（l）/F- complexation.