比率型碳点荧光传感器检测机理与应用研究进展

比率型荧光传感器由于具有抗干扰能力强和灵敏度高等优点,在食品安全、金属离子检测、环境污染分析等许多领域显示出巨大的应用潜力。而碳点作为一种新型荧光材料,不仅具有优良的荧光性能,而且毒性低、易于表面功能化,非常适合构建比率型荧光传感器。本文就近年来比率型碳点荧光传感器在检测领域的研究进展进行综述,重点阐述了碳点的荧光检测机理,并根据碳点使用情况的不同,对不同类型的比率型碳点荧光传感器进行了分类总结。最后提出了该领域亟待解决的困难和问题,并对其在分析物检测方面的发展方向进行了展望。     

Supramolecular Structural Inorganic-organic Hybrid[(4-Bromoanilimiun)([18]crown-6)]_3[PMo_(12)O_(40)]·CH_3CN

A novel supramolecular structural inorganic-organic hybrid [(4-bromoanilimiun)([18]crown-6)]_3[PMo_(12)O_40]·CH_3 CN has been synthesized through standard solvent evaporated method. The structure of the title compound was determined through single-crystal X-ray diffraction analysis. It crystallizes in monoclinic system with P21/n space group. The crystal data are a = 18.9529(4), b = 26.4444(5), c = 19.0985(4) ?, β = 90.132(6)o, V = 9572.1(3) ?~3, Z = 4, Dc= 2.203 g·cm~(–1), μ = 14.956 mm~(–1), F(000) = 6192, S = 1.098, the final R = 0.0859 and w R(I 2σ(I)) = 0.2100. Supramolecular cations are constructed through strong N–H…O hydrogen bonding interaction between the six oxygen atoms of [18]crown-6 molecule and nitrogen atom of(4-bromoanilimiun) cation. Three kinds of different arranged supramolecular cations exist in the title compound, which are filled into the large space formed by [PMo_(12)O_40] polyoxoanions. Thermogravimentic differential thermal analysis revealed that hydrogen bonding interaction and intermolecular interaction play an important role in maintaining the stability of the title compound.     

基于纸基的荧光碳量子点传感器的可视化检测研究进展

碳量子点作为一种新型的纳米材料,其独特的荧光性能使其在物质检测领域得到了越来越多的关注。利用碳量子点与物质反应导致荧光强度发生变化的特性,可将其应用于可视化检测,检测方法分为荧光猝灭型和荧光恢复型。基于纸基的荧光传感器与基于液相反应的荧光检测相比,其快速、现场和可视化的特点更加突出,因此有着更为广泛的应用。本文针对碳量子点的荧光特性、可视化荧光检测、纸基传感器的研究现状,并结合本课题组相关研究进展进行论述,以期为今后纸基碳量子点荧光传感器的研究和应用提供参考。