Department of Chemistry, University of North Bengal, Darjeeling, West Bengal - 734013, India.
Centre for Nanotechnology, Indian Institute of Technology Guwahati, Assam - 781039, India.
Chem Commun (Camb). 2023 Oct 19;59(84):12653-12656. doi: 10.1039/d3cc04104b.
Herein we report that a surfactant modified quantum dot-complex (S-QDC; with -515 nm) nanocomposite, as a donor fluorophore, exhibits enhanced Förster resonance energy transfer (FRET) efficiency to an acceptor organic dye (-576 nm) in comparison to only the QDC. The proposed S-QDC (consisting of a ZnS quantum dot, zinc quinolate inorganic complex and cetyltrimethylammonium bromide (CTAB) surfactant) provides the unique and selective ratiometric visual detection of organic dyes present as food colorants in commercial chili powder, tomato ketchup and mixed fruit jam. Notably, the S-QDC shows a limit of detection (LOD) as low as 2.2 nM in the linear range of 0.17-4.89 μM for food colorants. Furthermore, the present work will bring new possibilities to unravelling the chemistry among surfactants, inorganic complexes and quantum dots to make newer optical materials with futuristic scope of utilization ranging from optical sensors to light emitting devices.
本文报道了一种表面活性剂修饰的量子点复合物（S-QDC；-515nm）纳米复合材料，作为供体荧光团，与仅有的量子点相比，表现出增强的Förster 共振能量转移（FRET）效率至受体有机染料（-576nm）。所提出的 S-QDC（由 ZnS 量子点、锌喹啉酸盐无机配合物和十六烷基三甲基溴化铵（CTAB）表面活性剂组成）提供了独特且选择性的比率视觉检测，可用于检测商业辣椒粉、番茄酱和混合果酱中存在的作为食品着色剂的有机染料。值得注意的是，S-QDC 对食品着色剂在 0.17-4.89 μM 的线性范围内，检测限（LOD）低至 2.2 nM。此外，本工作将为揭示表面活性剂、无机配合物和量子点之间的化学关系带来新的可能性，以制造具有从光学传感器到发光器件等未来应用范围的新型光学材料。
