项目名称: 硫代罗丹明B酰肼在介孔SiO2纳米纤维膜上的固载化及其对Hg2+荧光传感性能研究
项目编号: No.21303259
项目类型: 青年科学基金项目
立项/批准年度: 2014
项目学科: 数理科学和化学
项目作者: 李守柱
作者单位: 中国科学院新疆理化技术研究所
项目金额: 25万元
中文摘要: 近年来,汞离子的现场、快速、灵敏检测受到了广泛关注。虽然目前研制出一些汞离子探针分子,然而固载化的汞离子荧光探针的研究还是很有限,存在固载化灵敏度不高、不易再生等问题。本项目将针对以上汞离子荧光探针固载化问题,开展基于荧光增强型探针分子在介孔二氧化硅纳米纤维膜上固载化的研究工作。项目拟选用硫代罗丹明B酰肼作为汞离子选择性荧光探针分子,通过共价键将其固载化于介孔二氧化硅纳米纤维膜的孔道表面,并通过调控反应体系中反应物浓度、反应时间等因素,控制介孔纤维膜材料的固载化,研究可控修饰过程对材料的荧光性能、传感灵敏度等性能的影响,在分子水平上揭示荧光传感识别等微观过程。此外,探索固载化后荧光探针分子保持对汞离子活性响应的条件,以期通过较为简单的改性方法实现荧光探针分子在介孔纤维膜上的有效地固载化,为基于汞离子荧光探针分子固载化的发展提供理论线索和实验依据。
中文关键词: 纳米纤维膜;介孔二氧化硅;荧光传感;硫代罗丹明B;碳量子点
英文摘要: In recent years, the on-spot, rapid and sensitive detection of mercury ions has been widely concerned. Although some mercury ion probe molecules were developed, the immobilized fluorescent probes for mercury ion are very limited due its low sensitivity and difficult regeneration. Herein, we plan to study the fluorescence enhancement sensing of mesoporous silica nanofiber membrane modified by fluorescent probing molecule for the mercury ion sensing. In this project, a selective fluorescent probe molecule, rhodamine B thiohydrazide, will be used to modify the surface in mesoporous silica nanofiber membrane via covalent bonding.The controllable modification of mesoporous nanofiber membrane material and the following effect on fluorescent material performance and its sensitivity for merucry ions will be stuided by adjusting the experimental parameters like reactants' concentration and reaction times. Besides, the microscopic fluorescence sensing recognition process will be revealed at a molecular level. In addition, we also plan to explore the conditions that keep fluorescent probing molecule sensitive to mercury ions after modification and thus to achieve the immobilization of fluorescent probes on the mesoporous fiber membrane by simple and effective approaches. This project is expected to provide clues for the de
英文关键词: nanofiber membrane;silica;fluorescent sensing;rhodamine B;carbon quantum dots