Li Zhonghao, Wan Zherui, Cui Xiaoxu, Chen Qi, Hua Yue, Yang Guang
Department of Chemistry and Chemical Engineering, College of Chemistry, Chemical Engineering and Resource Utilization, Northeast Forestry University, Hexing Road 26, Harbin, 150040, P. R. China.
Mikrochim Acta. 2025 Mar 17;192(4):234. doi: 10.1007/s00604-025-07093-1.
Polymer dots (PT-PDs) were obtained through a "synthesis-modification integration" method by using polyethyleneimine (PEI) and tartaric acid (TA) as raw materials. The designed PT-PDs displayed a nanoscale structure with an average size of 1.6 nm, and bright blue fluorescence (FL) emission with a fluorescence quantum yield (QY) of 14.3%. Moreover, the PT-PDs were used as a sensing platform for the sensitive and quantitative detection of tetracyclines (TCs) and Al via fluorescence quenching and recovery. The LODs for tetracycline hydrochloride (TCH), doxycycline (DOX), and Al were 94.8 nM, 76.7 nM, and 177.8 nM, respectively. In addition, PT-PDs incorporated with polyacrylamide were used for the recognition of TCs and Al in a portable manner on the basis of the fluorescence "ON-OFF-ON" strategy, which revealed great application in the field of anti-counterfeiting and encryption.
以聚乙烯亚胺（PEI）和酒石酸（TA）为原料，通过“合成-修饰一体化”方法制备了聚合物点（PT-PDs）。所设计的PT-PDs呈现出平均尺寸为1.6纳米的纳米级结构，并具有14.3%的荧光量子产率（QY）的亮蓝色荧光（FL）发射。此外，PT-PDs被用作传感平台，通过荧光猝灭和恢复对四环素（TCs）和铝进行灵敏定量检测。盐酸四环素（TCH）、多西环素（DOX）和铝的检测限分别为94.8 nM、76.7 nM和177.8 nM。此外，基于荧光“开-关-开”策略，与聚丙烯酰胺结合的PT-PDs被用于以便携式方式识别TCs和铝，这在防伪和加密领域显示出巨大的应用潜力。
