摘要
以二乙基三胺五乙酸(dtpa)、杀草强(amitrole)及钐稀土盐为原材料,设计了一种新型稀土荧光探针SmⅢ-dtpaa-bis(amitrole)来检测amitrole。合成的荧光探针采用红外光谱对其结构进行了表征,采用紫外可见光谱和荧光光谱对其光学性质进行了研究。探究了反应温度、反应时间、溶液酸碱度以及杀草强浓度对SmⅢ-dtpaa-bis(amitrole)荧光光谱的影响。实验结果表明,新型稀土荧光探针SmⅢ-dtpaa-bis(amitrole)的最佳反应温度为393 K,最佳反应时间为7 h,最佳溶液pH为7.00。SmⅢ-dtpaa-bis(amitrole)具有较宽的线性范围0.1μmol/L~210μmol/L和较低的检测限0.975μmol/L。将amitrole加入新型荧光探针SmⅢ-dtpa-bis(amitrole)溶液中后,溶液的荧光发生明显的猝灭现象。
In this paper, diethyltriamine pentaacetic acid(dtpa), amitrole and Sm(NO3)3·6 H2O are used as raw materials, a new type of rare earth fluorescent probe SmⅢ-dtpaa-bis(amitrole) is designed to detect amitrole. The structure of the synthesized fluorescent probe was characterized by FT-IR, and its optical properties were studied by Uv-vis and fluorescence spectra. The impacts of reaction temperature and reaction time on the fluorescence spectra of SmⅢ-dtpaa-bis(amitrole) are explored. In addition, the influence of solution pH on the fluorescence spectrum of SmⅢ-dtpaa-bis(amitrole) is studied. Experimental results show that the best reaction temperature of the SmⅢ-dtpaa-bis(amitrole) is 393 K, the best reaction time is 7 h and the best solution pH is 7.00. Fluorescence probe SmⅢ-dtpaa-bis(amitrole) has a wide linear range 0.1 μmol/L~210 μmol/L and lower detection limit of 0.975 μmol/L. After the amitrole is joined to the SmⅢ-dtpaa-bis(amitrole), the fluorescence intensity of SmⅢ-dtpaa-bis(amitrole) shows obvious quenching phenomenon. Therefore, SmⅢ-dtpaa-bis(amitrole) as a fluorescence probe can detect amitrole.
作者
刘文芳
王连连
王娜
刘积
LIU Wen-fang;WANG Lian-lian;WANG Na;LIU Ji(Department of Chemistry,Baotou Teachers,College,Baotou 014030,China)
出处
《稀土》
CAS
CSCD
北大核心
2021年第5期95-103,共9页
Chinese Rare Earths
基金
内蒙古包头市科技计划项目(2019C3003-2-1-2)
大学生创新创业训练计划项目(21130004)。
