快速合成稀土金属—有机骨架材料及其荧光敏感特性研究  

Rapid Synthesis and Fluorescence Properties of Rare Earth Metal-organic Materials

作　　者：王玮 韩成良[2] 吴云[2] 刘伶俐 张伟 孙国栋 WANG Wei;HAN Chengliang;WU Yun;LIU Lingli;ZHANG Wei;SUN Guodong(Analytical Instrumentation Center,Hefei University,Hefei 230601,China;Dept.of Chemistry and Materials Engineering,Hefei University,Hefei 230601,China)

机构地区：[1]合肥学院分析测试中心,安徽合肥230601 [2]合肥学院化学与材料工程系,安徽合肥230601

出　　处：《淮海工学院学报（自然科学版）》2018年第4期52-56,共5页Journal of Huaihai Institute of Technology:Natural Sciences Edition

基　　金：合肥学院科研发展基金项目(17ZR03ZDB);国家级大学生创新创业训练计划项目(201711059094;201711059095)

摘　　要：以Dy为中心离子、对苯二甲酸为配体,采用超声扩散法快速合成了[Dy_2(BDC)_3(H_2O)_4]_n金属—有机骨架材料.采用X射线衍射仪和场发射扫描电子显微镜对该产品的结构和形貌进行了表征.结果表明,实验获得的目标产物的尺寸和形貌与超声时间存在较大关系.研究了[Dy_2(BDC)_3(H_2O)_4]_n对于硝基爆炸物(4-硝基甲苯、2,4-二硝基甲苯以及2,6-二硝基甲苯)的荧光敏感特性.结果表明,[Dy_2(BDC)_3(H_2O)_4]_n对3种硝基爆炸物均具有响应速度快和敏感性强的特点,并且硝基爆炸物会对产物的荧光产生较强的猝灭作用.随着4-硝基甲苯的加入体积由0增加到1μL(体积分数0～0.05%),产物的荧光强度降低18.4%,加入体积增至15μL时(体积分数0.75%),发生荧光猝灭;2,4-硝基甲苯的加入体积由0增加到2μL(体积分数0～0.1%)时,产物的荧光强度降低21.7%,加入体积为22μL(体积分数1.1%)时,产物的荧光发生猝灭;2,6-硝基甲苯的加入体积由0增加到2μL(体积分数0～0.1%)时,荧光强度降低24.5%,加入体积为25μL(体积分数1.25%)时,产物的荧光发生猝灭.In this paper,a novel rare earth metal-organic material([Dy2(BDC)3(H2O)4]n)constructed by Dy ions and terephthalic acid was successfully synthesized by using an ultrasonic combined with vapor diffusion technique.The phases and morphology of the products were characterized by X-ray diffraction(XRD)and field emission scanning electron microscope(FE-SEM).The results indicated that the size and shape of the obtained[Dy2(BDC)3(H2O)4]ncould be tuned by varying the ultrasonic time.The sensitivity of fluorescent nitro-explosives(4-nitrotoluene,2,4-dinitrotoluene and 2,6-dinitrotoluene)of[Dy2(BDC)3(H2O)4]nwas further studied.The results showed that the as-synthesized[Dy2(BDC)3(H2O)4]nwas highly sensitive to nitro-explosive.For 4-nitrotoluene,the emission intensity decreased gradually to approximately 18.4%when the volume increased from 0to 1μL(V/V:0—0.05%)and the fluorescence quenching effect was observed when 15μL(V/V:0.75%).For 4-nitrotoluene,the volume of 2,4-dinitrotoluene increased from 0to 2μL(V/V:0—0.1%),the emission intensity decreased gradually from approximately 21.7%,a significant fluorescence quenching effect was observed when 22μL(V/V:1.1%).For 2,4-dinitrotoluene,the volume of 2,6-dinitrotoluene increased from 0to 2μL(V/V:0—0.1%),the emission intensity decreased gradually from approximately 24.5%,a fluorescence quenching effect was observed when 25μL(V/V:1.25%)2,6-dinitrotoluene was added.

关 键 词：快速合成 金属-有机骨架 超声 荧光 稀土 

分 类 号：O641.4[理学—物理化学] TQ422[理学—化学]