摘要
以非离子嵌段共聚物P123为软模板,以正硅酸乙酯(TEOS)为硅源前驱体,利用异硫氰基荧光素与3-氨丙基三乙氧基硅烷(APTES)反应,生成功能化发射绿光的硅烷偶联剂,采用共沉淀法制备了尺寸超小的(10~12 nm)荧光素修饰的单胶束纳米粒子。通过TEM,FTIR和UV光谱分别表征了粒子的形貌和表面荧光素基团接枝情况。利用DLS和Zeta电位测试表征了粒子的单分散性和表面电性。采用稳态荧光光谱进行表征,结果表明,该纳米粒子的荧光发光带约为500 nm,用荧光素修饰的单胶束纳米粒子对水溶液中的Fe^(3+)进行检测,结果表明,当水溶液中c(Fe^(3+))=1×10^(-5)mol/L时,绿光发射的单胶束荧光纳米粒子的发光强度淬灭为原有强度的10.1%。因此,该粒子不仅具有良好的发光稳定性、水溶性,还具有优异的Fe^(3+)检测能力,在水溶液中Fe^(3+)的检测与识别方面有着良好的应用前景。
Using nonionic block copolymer P123 as a soft template and tetraethyl orthosilicate(TEOS)as the silicon source precursor,a functionalized silane coupling agent emitting green fluorescence was synthesized through the reaction of isothiocyanate fluorescein with 3-aminopropyltriethoxysilane(APTES).Fluorescein-modified single micelle nanoparticles with ultra-small sizes(10~12 nm)were prepared via the co-precipitation method.The morphology and surface fluorescein grafting of the nanoparticles were characterized by TEM,FTIR,and UV spectroscopy.The monodispersity and surface charge of the particles were assessed using DLS and Zeta potential measurements.Steady-state fluorescence spectroscopy revealed that the fluorescence emission band of the nanoparticles was around 500 nm.Detection of Fe^(3+)in aqueous solutions using fluorescein-modified single micelle nanoparticles indicated that when the concentration of Fe^(3+)in the solution was 1×10^(-5)mol/L,the fluorescence intensity of the green-emitting nanoparticles quenched to 10.1%of its original intensity.Therefore,these nanoparticles not only possess excellent fluorescence stability and water solubility but also exhibit outstanding Fe^(3+)detection capabilities,presenting promising applications in the detection and identification of Fe^(3+)in aqueous solutions.
作者
刘泽慧
刘乃青
岳军
董肇勇
王旭
陆书来
杨雨富
王海泉
徐金峰
祁彦龙
盖方圆
LIU Zehui;LIU Naiqing;YUE Jun;DONG Zhaoyong;WANG Xu;LU Shulai;YANG Yufu;WANG Haiquan;XU Jinfeng;QI Yanlong;GAI Fangyuan(Advanced Institute of Materials Science,School of Chemistry and Biology,Changchun University of Technology,Changchun 130012,China;Research Institute of Jilin Petrochemical Company,PetroChina,Jilin 132021,China;Changchun Institute of Applied Chemistry,Chinese Academy of Sciences,Changchun 130022,China)
出处
《化工科技》
CAS
2024年第3期26-30,共5页
Science & Technology in Chemical Industry
基金
吉林省科技厅国际合作项目(20210402068GH)
长春市科技局青年科技人才创新创业专项(21QC06)
吉林省自然科学基金自由探索项目(YDZJ202201ZYTS345)
中国石油吉林石化公司委托技术开发课题(2022-4257)。
关键词
单胶束SiO_(2)荧光纳米粒子
核-壳结构
水体系
可控合成
共沉淀
Fluorescent silica single micellar nanoparticles
Core-shell structure
Water system
Controllable synthesis
Coprecipitation method
