Convenient Size Analysis of Polystyrene Nanoplastics via Regulating the Radiative Transition Efficiency

化学 聚苯乙烯 辐射传输 化学工程 有机化学 光学 聚合物 物理 工程类
作者
Yuan-Jun Tong,Xinying Gong,Yulu Tian,Qian Liu,Dongmei Wang,Zhengjun Gong
出处
期刊:Analytical Chemistry [American Chemical Society]
卷期号:96 (36): 14598-14603
标识
DOI:10.1021/acs.analchem.4c03037
摘要

Developing a convenient method to efficiently determine the size of nanoplastics in the environment is urgent in terms of ecological or human health protection. In this work, a novel strategy for discriminating the size of polystyrene (PS)-based nanoplastics was reported via regulating the radiative transition efficiency of NH2–UIO-66 (NU) with benzoic acid (BA) as the auxiliary ligand. The elaborately doped BA capped the defect sites and triggered nonradiative transition efficiency of NU. As a result, the formed composite (denoted as BA-NU) was more sensitive to interaction among neighboring NU and nanoplastics. The interaction between particles limited the rotation and vibration of the benzene ring within the BA-NU molecule, thus increasing the BA-NU fluorescence. The sensitivity of BA-NU on nanoplastics was well controlled by manipulating the doping contents of BA, leading to precisely tunable physicochemical properties for this structure. Deriving from the exquisitely designed nanostructures, the composite of BA-NU was successfully used to discriminate different size PS as an ultrasensitive turn-on probe. This work highlights the possibility of boosting the detection performance by regulating the main structure with guest molecules at the molecular level.
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