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Surface Functionalization of Mesoporous Silica Nanoparticles with Pyronine Derivative for Selective Detection of Hydrogen Sulfide in Aqueous Solution
Colloids and Surfaces A: Physicochemical and Engineering Aspects ( IF 4.9 ) Pub Date : 2020-02-01 , DOI: 10.1016/j.colsurfa.2019.124194
Zhipeng Gao , Min Qiao , Mengmin Tan , Haonan Peng , Liping Ding

Abstract The selective detection of hydrogen sulfide (H2S) in aqueous solution has drawn increasing attention over the past decade. Although many fluorescent chemosensors in homogeneous solutions have been developed, the creation of rapid, highly sensitive and selective fluorescent nanoparticle sensors for detection of H2S are still less reported. In the present work, a novel organic-inorganic composite fluorescent sensor, M-SiO2@PYR, was synthesized by covalent coupling pyronine (PYR) on the solid surface of mesoporous silica nanoparticles. The obtained mesoporous nanoparticles were characterized by TEM and BET measurements. The chemical immobilization of organic fluorophores on the silica nanoparticles were analyzed by FT-IR, XPS, TGA, and solid state NMR methods. The fluorescent mesoporous nanoparticle sensor, M-SiO2@PYR, was found to show sensitive and selective quenching responses toward H2S in aqueous solution compared to a series of competitive analytes. The nanoparticle sensor also displayed a low detection limit of 103.6 nM to H2S, illustrating a high sensitivity. Moreover, the detection of H2S could be also realized in biological fluids like serum or urine. The present work provides a novel way to prepare fluorescent sensor for detecting biothiols in aqueous solution, which may be further used to develop discriminative sensor for multiple biothiols by modulating surface modification.

中文翻译:

具有派洛宁衍生物的介孔二氧化硅纳米颗粒的表面功能化用于选择性检测水溶液中的硫化氢

摘要 在过去的十年中,水溶液中硫化氢 (H2S) 的选择性检测引起了越来越多的关注。尽管已经开发了许多在均质溶液中的荧光化学传感器,但用于检测 H2S 的快速、高灵敏度和选择性荧光纳米颗粒传感器的创建仍然鲜有报道。在目前的工作中,通过在介孔二氧化硅纳米粒子的固体表面上共价偶联吡喃宁(PYR)合成了一种新型的有机-无机复合荧光传感器,M-SiO2@PYR。获得的介孔纳米粒子通过 TEM 和 BET 测量进行表征。通过 FT-IR、XPS、TGA 和固态 NMR 方法分析了有机荧光团在二氧化硅纳米粒子上的化学固定。荧光介孔纳米颗粒传感器,M-SiO2@PYR,与一系列竞争性分析物相比,发现对水溶液中的 H2S 表现出灵敏和选择性的猝灭反应。纳米颗粒传感器对 H2S 也显示出 103.6 nM 的低检测限,表明其具有高灵敏度。此外,还可以在血清或尿液等生物体液中实现硫化氢的检测。本工作提供了一种制备用于检测水溶液中生物硫醇的荧光传感器的新方法,该方法可进一步用于通过调节表面改性来开发多种生物硫醇的鉴别传感器。也可以在血清或尿液等生物体液中检测 H2S。本工作提供了一种制备用于检测水溶液中生物硫醇的荧光传感器的新方法,该方法可进一步用于通过调节表面改性来开发多种生物硫醇的鉴别传感器。也可以在血清或尿液等生物体液中检测 H2S。本工作提供了一种制备用于检测水溶液中生物硫醇的荧光传感器的新方法,该方法可进一步用于通过调节表面改性来开发多种生物硫醇的鉴别传感器。
更新日期:2020-02-01
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