快速室温合成IRMOF-3用于检测水中的烯啶虫胺  

Rapid room-temperature synthesis of IRMOF-3 for the detection of nitenpyram in water

作　　者：徐堂煊 杨磊 傅丽君 邹汉勋 黎承昊 杨月珠 XU Tangxuan;YANG Lei;FU Lijun;ZOU Hanxun;LI Chenghao;YANG Yuezhu(College of Environment and Safety Engineering,Fuzhou University,Fuzhou 350108,China;Fujian Provincial Key Laboratory of Ecology-Toxicological Effects and Control for Emerging Contaminants/Key Laboratory of Ecological Environment and Information Atlas of Fujian Provincial University/College of Environmental and Biological Engineering,Putian University,Putian 351100,China)

机构地区：[1]福州大学环境与安全工程学院,福建福州350108 [2]福建省新型污染物生态毒理效应与控制重点实验室/生态环境及其信息图谱福建省高等学校重点实验室/莆田学院环境与生物工程学院,福建莆田351100

出　　处：《中山大学学报（自然科学版）（中英文）》2024年第3期128-136,共9页Acta Scientiarum Naturalium Universitatis Sunyatseni

基　　金：国家自然科学基金(22101283);福建省促进海洋与渔业产业高质量发展专项资金项目(FJHYF-2023-L-26);莆田学院联培研究生科研项目(yjs202212);福建省自然科学基金(2022J011160)。

摘　　要：现代农业的迅速发展离不开农药的大量使用,同时也由于农药分子的结构稳定性与高毒性作用,使其成为环境中的主要有机污染物。本研究采用简便快捷的室温合成方法制备了高荧光效率的IRMOF-3,将其应用于有毒新烟碱类杀虫剂——烯啶虫胺(NIT,nitenpyram)的荧光检测分析。结果表明:制备出的IRMOF-3为纯相晶体材料,具有在427 nm稳定的光致发光性质。IRMOF-3的蓝色荧光可被水环境中的NIT快速淬灭,在诸多干扰物中表现出了良好的选择性和强抗干扰能力。以此建立的荧光分析方法在0~38μmol/L的NIT浓度范围内具有显著相关性,检测限(LOD)低至0.35μmol/L,加标回收实验证明该方法有良好的回收率(95.16%~106.51%)且相对标准偏差(RSD)≤6.68%。对多种表征结果的分析说明荧光检测机理主要为NIT对于激发光的能量竞争吸收,而电子转移所导致的荧光淬灭也是IRMOF-3对NIT的荧光检测机理之一。综上所述,基于荧光分析法IRMOF-3实现了对水环境中NIT的高灵敏度含量检测,为未来NIT类水环境污染检测提供了一种简便可靠的分析方法。The rapid development of modern agriculture generally relies on the massive use of pesticides,which also become the main organic pollutants in the environment due to the structural stability and high toxicity effects of pesticide molecules.In this study,IRMOF-3 with high fluorescence efficiency was prepared by a simple and rapid room-temperature synthesis method,and then applied to the fluorescence detection and analysis of the toxic neonicotinoid pesticide,nitenpyram(NIT).The results show that the prepared IRMOF-3 is a pure-phase crystalline material with stable photoluminescence at 427 nm;The blue fluorescence of IRMOF-3 can be quenched quickly by NIT in the aqueous environment,which shows a good selectivity and a strong anti-interference ability among many interferences.The fluorescence analytical method developed by this method showed a significant correlation in the concentration range of 0~38μmol/L of NIT,and the limit of detection(LOD)was as low as 0.35μmol/L.The spiked recoveries demonstrated that the method had good recoveries(95.16%~106.51%)with the relative standard deviations(RSDs)≤6.68%.The analysis of the multiple characterization results indicated that the fluorescence detection mechanism mainly refers to the energy competition absorption of NIT for the excitation light.In addition,the fluorescence quenching due to electron transfer is also one of the fluorescence detection mechanisms of IRMOF-3 for NIT.In conclusion,IRMOF-3 based on fluorescence analysis has realized the detection of NIT with high sensitivity,which provides a simple and reliable analytical method for the future detection of NIT-type pollution in water environment.

关 键 词：IRMOF-3 烯啶虫胺 荧光检测 能量竞争吸收 电子转移 

分 类 号：O657.3[理学—分析化学]