绿光发射的单胶束SiO2纳米粒子的构筑及其Fe3+的荧光传感性能研究

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中文摘要：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Fe3+进行检测,结果表明,当水溶液中c(Fe3+)=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Fe3+检测能力,在水溶液中Fe3+的检测与识别方面有着良好的应用前景.

外文标题：Synthesis of green light emitting silica-cross linked micellar nanoparticles with FITC-functionalized for Fe3+in aqueous media

外文摘要：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 Fe3+in aqueous solutions using fluorescein-modified single micelle nanoparticles indicated that when the concentration of Fe3+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 Fe3+detection capabilities,presenting promising applications in the detection and identification of Fe3+in aqueous solutions.

外文关键词：

Fluorescent silica single micellar nanoparticlesCore-shell structureWater systemControllable synthesisCoprecipitation method

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

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作者单位：

长春工业大学材料科学高等研究院,吉林长春 130012

中国石油吉林石化公司研究院,吉林吉林 132021

中国科学院长春应用化学研究所,吉林长春 130000

关键词：

单胶束SiO2荧光纳米粒子核-壳结构水体系可控合成共沉淀

基金：

吉林省科技厅国际合作项目长春市科技局青年科技人才创新创业专项吉林省自然科学基金自由探索项目中国石油吉林石化公司委托技术开发课题

项目编号：

20210402068GH21QC06YDZJ202201ZYTS3452022-4257

出版年：

2024

化工科技

中国石油天然气股份有限公司吉林石化分公司

化工科技

CSTPCD

影响因子：0.386

ISSN：1008-0511

年,卷(期)：2024.32(3)