AIE型荧光探针对土壤中硫氰酸根的识别和检测

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AIE-Type Fluorescent Probe-Based Recognition and Detection of Thiocyanatein Soil

REN Jie, LU Wan-peng, ZHENG Zi-qi Collegeofedical/QiluedicalUniversity,Zibo55ooo,ina

Abstract:Thiocyanate (SCN-）playsamultifacetedoleinagriculture,contributingpositivelytoplant nutrition,biological control,andsoilmprovement.Hweer,tocaateisiculttoecomposenditsccuulationcanleadtoetretal environmentalconsequences,ncludingplanttoxicitywaterresourcecontamination,andpotentialipactsonodfety andhuman health.Therefore,this studyutilizedtheSuzukicouplingreactiontosuccessfullysynthesizeaphenylpyridine-based AIE fluorescent probe molecule. Its structure was characterized by 1H NMR,and the fluorescent response to SCN- was investigatedviafluorescenceemisionspectroscopy.Inverted fluorescencemicroscopyand dynamiclightscattering experiments revealed that in the presence of SCN- ,the probe molecules exhibited aggregation-induced emission enhancement. Analytical findings demonstrated that the probe displayed high selectivity and sensitivity towards SCN- ,with common biorelated anions showing no interference in SCN- recognition and a linear detection response at certain concentrations. The detection limit was 6.79μM .Additionally,the enhanced scattered light due to the probe aggregation enabled the semiquantitative,naked-eye detection of SCN- .This feature holds significant potential in addressing agricultural environmental pollution issues,such as rapid monitoring of soil contamination.

Keywords:Thiocyanate; Suzukicouplingreaction; fluorescent probe;aggregation-induced emision;agriculturalchemistry

随着全球人口的不断增长，粮食安全已经成为21世纪最为严峻的全球性挑战之一。（剩余20701字）