Kill two birds with one stone: Ratiometric sensing of phosphate via a single-component probe with fluorescence-scattering dual-signal response behavior

作者全名："Yan, Hang; Sun, Zhe; Qing, Min; Ling, Yu; Liu, Wei Wei; Li, Nian Bing; Luo, Hong Qun"

作者地址："[Yan, Hang; Sun, Zhe; Ling, Yu; Liu, Wei Wei; Li, Nian Bing; Luo, Hong Qun] Southwest Univ, Sch Chem & Chem Engn, Key Lab Luminescence Anal & Mol Sensing, Chongqing 400715, Peoples R China; [Qing, Min] Chongqing Med Univ, Coll Pharm, Chongqing 400016, Peoples R China"

通信作者："Li, NB; Luo, HQ (通讯作者)，Southwest Univ, Sch Chem & Chem Engn, Key Lab Luminescence Anal & Mol Sensing, Chongqing 400715, Peoples R China."

来源：ANALYTICA CHIMICA ACTA

ESI学科分类：CHEMISTRY

WOS号：WOS:000938139900001

JCR分区：Q1

影响因子：5.7

年份：2023

卷号：1246

期号：　

开始页：　

结束页：　

文献类型：Article

关键词：Single-component probe; Porphyrin paddlewheel framework-3 (PPF-3); nanosheets; Fluorescence; Second-order scattering; Ratiometric sensor; Phosphate

摘要："Ratiometric fluorescence sensors gain stronger anti-interference ability via self-calibration. Nevertheless, ratiometric analysis of phosphate (Pi) still faces problems such as complicated construction process of dual emission probes and possible interferences from outputting mono-category fluorescent signal. Herein, we propose a ""kill two birds with one stone"" strategy to address these challenges, by simply introducing a single-component probe, porphyrin paddlewheel framework-3 (PPF-3) nanosheets without modification, encapsulation or complex, to integrate fluorescence (FL) -second-order scattering (SOS) dual-signal for ratiometric detection of Pi. PPF-3 nanosheets are constructed by coor-dination of Co2+ with 5,10,15,20-tetrakis(4-carboxyl-phenyl)-porphyrin (TCPP) ligands, displaying weak FL and strong SOS, two different and independent signals. In the response system to Pi, Co2+ and TCPP serve as the recognition element and signal unit, respectively. After interacting with Pi, the high affinity for Co2+ makes Pi snatch Co2+from the PPF-3 nanosheets, causing their structure disassembly (SOS decrease) and TCPP release (FL increase). Finally, the FL -SOS ratiometric platform is successfully employed to access Pi in real water samples. Synchronous collection of FL and SOS from the single-component probe provides a simpler and more efficient way on ratiometric sensor design as well as a new useful technique for monitoring target-induced aggregation and disaggregation behavior."

基金机构：National Natural Science Foundation of China [21675131]; Natural Science Foundation of Chongqing [cstc2020jcyj-zdxmX0003]

基金资助正文："This work was supported by the National Natural Science Foundation of China (No. 21675131) , and the Natural Science Foundation of Chongqing (No. cstc2020jcyj-zdxmX0003) ."