Department of Forensic Chemistry, Criminal Investigation Police University of China, Shenyang 110854, PR China.
Department of Forensic Chemistry, Criminal Investigation Police University of China, Shenyang 110854, PR China.
Spectrochim Acta A Mol Biomol Spectrosc. 2020 Mar 5;228:117793. doi: 10.1016/j.saa.2019.117793. Epub 2019 Nov 14.
A novel fluorescence probe p-PBP for PA was synthesized based on a basic N atom as the electronic donor. The probe could detect PA over TNT, CE, PETN, RDX, HMX, NB, NT, DNT, NP, DNP, and common inorganic explosive ions (K, Ba, NH, NO, ClO, and ClO), and common ions (Na, Ca, and Mg) with high selectivity. The fluorescence quenching was attributed to the photo-induced electron transfer (PET) processes from the excited state of p-PBP to the ground state PA. The detection limit of probe p-PBP for PA was as low as 13.06 nmol/L, which is far lower than the concentration stipulated by the Environmental quality standards for surface water. The response time was less than 30 s. Hence, the fluorescence probe p-PBP was successfully developed to detect the concentration level of PA in real samples, which would provide a novel quantitative analysis method of PA in forensic science.
一种基于碱性 N 原子作为电子给体的新型荧光探针 p-PBP 被合成用于检测 PA。该探针可以选择性地检测 PA，而不受 TNT、CE、PETN、RDX、HMX、NB、NT、DNT、NP、DNP 和常见无机爆炸物离子（K、Ba、NH、NO、ClO 和 ClO）以及常见离子（Na、Ca 和 Mg）的干扰。荧光猝灭归因于从 p-PBP 的激发态到 PA 的基态的光诱导电子转移（PET）过程。探针 p-PBP 对 PA 的检测限低至 13.06 nmol/L，远低于地表水环境质量标准规定的浓度。响应时间小于 30 s。因此，成功开发了荧光探针 p-PBP 来检测实际样品中 PA 的浓度水平，这将为法医学中 PA 的定量分析提供一种新方法。
