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OALib Journal期刊
ISSN: 2333-9721
费用：99美元
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一种基于2,7-咔唑-芴交替共轭聚合物的荧光开启型汞离子光学探针
DOI: 10.3724/SP.J.1105.2014.13357, PP. 672-677
Keywords: 2,7-咔唑,共轭聚合物,光学探针,荧光开启,汞离子
Abstract:
通过Suzuki偶合反应合成出一种主链中含2，7-取代咔唑的蓝光发射共轭聚合物，聚［2，7-（9，9-二辛基芴）-co-2，7-N-十二烷基咔唑］（PF27Cz）.随着I-（NaI水溶液）的加入，I-的重原子效应使PF27Cz溶液（THF）的荧光逐渐淬灭，其溶液的外观颜色由无色变为浅黄色.通过在相同条件下的对比实验可知其他阴离子的引入并未使PF27Cz的光学性质产生类似的变化.利用Hg2+与I-之间的高结合常数与络合配比，Hg2+的加入使PF27Cz-I-络合物的荧光逐渐回复，其外观颜色也由浅黄色回复至无色.通过对PF27Cz-I-在递增浓度Hg2+存在下的荧光发射性质进行分析可知其对Hg2+的检出限达约为1.6×10-8mol/L.通过对比实验可知背景金属阳离子的存在对Hg2+的光学响应并无明显的干扰.实验结果表明PF27Cz是一类具有较高灵敏度和抗干扰性的turn-on型Hg2+光学探针材料.
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