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聚噻吩-b-聚喹喔啉共轭嵌段聚合物对Co2+离子的高选择性可视化检测

DOI: 10.11777/j.issn1000-3304.2015.140279, PP. 319-325

Keywords: 聚噻吩,聚喹喔啉,共轭聚合物,嵌段共聚物,钴离子检测

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Abstract:

探讨了聚(3-己基噻吩)-b-聚(2,3-喹喔啉)(P3HT-b-PQD)共轭嵌段聚合物对二价钴离子的高选择性可视化检测.该类结构明确的嵌段共聚物以Ni(dppp)Cl2为引发剂,通过顺序投料的"一锅法"活性配位聚合方法合成,其四氢呋喃溶液呈黄色,在365nm的紫外光照射下发出橙黄色的荧光.该类嵌段聚合物可以实现对二价钴离子的可视化检测,加入二价钴离子后,其四氢呋喃溶液的颜色由黄色变为亮绿色.检测具有非常高的选择性,加入其它的金属离子不能产生溶液颜色的任何变化.此外,加入二价钴离子后,其四氢呋喃稀溶液在紫外下的发射光由橙黄色变为深绿色.其对于二价钴离子的检测限可达10-7mol/L.竞争实验表明,其它金属离子对于钴离子的识别不具有任何干扰.

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