香豆素功能化石墨烯量子点的制备及其对F-的荧光检测  

Synthesis of functionalized graphene quantum dots and its fluorescence detection of F^-

作　　者：问婧 赵宝茹 王健恺 张永[2] 马文辉[1] WEN Jing;ZHAO Bao-ru;WANG Jian-kai;ZHANG Yong;MA Wen-hui(College of Chemistry and Chemical Engineering,Heilongjiang Qiqihar 161006,China;College of Materials Science and Engineering,Qiqihar University,Heilongjiang Qiqihar 161006,China)

机构地区：[1]齐齐哈尔大学化学与化学工程学院,黑龙江齐齐哈尔161006 [2]齐齐哈尔大学材料科学与工程学院,黑龙江齐齐哈尔161006

出　　处：《齐齐哈尔大学学报（自然科学版）》2020年第6期1-5,共5页Journal of Qiqihar University(Natural Science Edition)

基　　金：齐齐哈尔大学创新科研项目(YJSCX2019041);齐齐哈尔大学创新科研项目(YJSCX2020003)。

摘　　要：设计并合成了一种在含水体系中荧光增强识别F-的香豆素功能化石墨烯量子点荧光探针N-GQDs。利用TEM、FT-IR和XPS对其形貌和结构进行了表征,结果表明,N-GQDs粒径分布均匀,平均粒径为3.7 nm,香豆素衍生物与GQDs共价相连。荧光光谱分析表明,N-GQDs在含水体系中,在常见阴离子(F^-,Cl^-,Br^-,I^-,AcO^-,HSO4^-,H2PO4^-,CN^-)中能够专一性地识别F^-,滴加F^-后引起荧光增强2.0倍并伴随16 nm的红移,检出限为0.01μmol/L,并成功地应用于现实水样中F^-的检测;推测的识别机理为N-GQDs与F^-产生氢键和/或去质子化作用。The large amount of fluoride emitted by urbanization and industrialization is responsible for serious environment and health problems.In this work,a functionalized graphene quantum dots fluorescent probe N-GQDs was designed and synthesized for fluorescence-enhanced recognition of F^-in aqueous system.The morphology and structure of the N-GQDs were identified by TEM,FT-IR and XPS.The results showed that the N-GQDs had a uniform particle size distribution with an average particle size of 3.7 nm,and coumarin derivative and GQDs were covalently linked.The fluorescence spectra indicated that among the anions(F^-,Cl^-,Br^-,I^-,AcO^-,HSO4^-,H2PO4^-,CN^-)investigated,only F^-led a 2.0-fold fluorescence enhancement and a 16 nm red-shift in aqueous solution.As F^-can fluorescence-enhancement of N-GQDs,direct fluorescent detection of F^-is achieved with LOD of 0.01μmol/L.In addition,detection of F^-in real water samples is achieved.The proposed mechanism was the formation of the hydrogen bond and/or deprotonation between N-GQDs and F^-.

关 键 词：光化学 纳米材料 化学分析 F- 荧光增强 实际水样 

分 类 号：O657.3[理学—分析化学] O613[理学—化学]