Cao Xi-Ying, Pang Chu-Ming, Xiao Ying, Xiao Wan-Qing, Luo Shi-He, He Jin-Ping, Wang Zhao-Yang
School of Chemistry, South China Normal University, Key Laboratory of Theoretical Chemistry of Environment, Ministry of Education; Guangzhou Key Laboratory of Analytical Chemistry for Biomedicine, Guangzhou 510006, China.
School of Health Medicine, Guangzhou Huashang College, Guangzhou 511300, China.
Polymers (Basel). 2021 Sep 14;13(18):3091. doi: 10.3390/polym13183091.
A new type of conjugated polybenzimidazole () was synthesized through a simple polycondensation reaction without metal catalysis, and -alkylation modification was carried out to solve the problems of solubility and fluorescence properties. A series of nano-microsphere polymers with large conjugation, good solubility, and strong fluorescence has been successfully used as "turn-off" fluorescent probes for the first time. The results show that, under suitable -alkylation conditions, the obtained can be used as a highly sensitive and selective fluorescent probe for the detection of Cu and Zn at the same time, and their detection limits are both nM levels. In addition, can be designed as an ultra-sensitive IMPLICATION logic gate at the molecular level, cyclically detecting Cu. With the test paper containing , easy and quick on-site detection can be achieved. This research provides a new idea for the brief synthesis of multifunctional materials.
通过简单的无金属催化缩聚反应合成了一种新型共轭聚苯并咪唑，并进行了烷基化修饰以解决溶解性和荧光性能问题。首次成功制备了一系列具有大共轭、良好溶解性和强荧光的纳米微球聚合物作为“关断型”荧光探针。结果表明，在合适的烷基化条件下，所得产物可同时用作检测铜和锌的高灵敏度和高选择性荧光探针，其检测限均为纳摩尔级别。此外，该产物可在分子水平设计为超灵敏的蕴含逻辑门，循环检测铜。利用含有该产物的试纸条，可实现简便快速的现场检测。本研究为多功能材料的简便合成提供了新思路。
