Department of Chemistry, M S Ramaiah Institute of Technology (Autonomous Institute, affiliated to Visvesvaraya Technological University, Belgaum), Bangalore, 560054, India.
Department of Chemistry, M. S. Ramaiah College of Arts Science and Commerce, Bangalore, 560054, India.
J Fluoresc. 2020 Mar;30(2):357-363. doi: 10.1007/s10895-020-02505-2. Epub 2020 Feb 19.
A single step hydrothermal mode of carbon nanodots (C-dots) synthesis from house-hold kitchen garbage such as snake gourd peel extract was successfully carried out. Characterisation of green synthesized C-dots were accomplished using UV-Visible and FTIR spectroscopy, Spectrofluorimetry and HRTEM. C-dots exhibited an appreciable quantum yield of 28.6%. Excitation-dependent photoluminescence emission properties and pH-sensitivity of C-dots were also studied in detail. C-dots exhibited strikingly selective detection of Fe ions via fluorescence quenching mechanism. Linearity was obtained in a concentration range of 10-100 μM with detection limit of 0.398 μM in accordance with the Stern-Volmer relation. The existence of oxygen containing functional moieties in luminescent C-dots could be attributed to the effectual complexation between the metal ion and C-dots. The selective sensing property of C-dots towards Fe ions provide avenue for biochemical analysis related to iron metabolism and diagnosis of anaemia.
成功地从家庭厨房垃圾（如丝瓜皮提取物）中采用单步水热法合成了碳点（C-dots）。通过紫外-可见和傅里叶变换红外光谱、荧光光谱和高分辨率透射电子显微镜对绿色合成的 C-dots 进行了表征。C-dots 的量子产率达到了 28.6%。还详细研究了 C-dots 的激发依赖性荧光发射特性和 pH 敏感性。C-dots 通过荧光猝灭机制对 Fe 离子表现出明显的选择性检测。根据 Stern-Volmer 关系，在 10-100 μM 的浓度范围内获得了线性关系，检测限为 0.398 μM。发光 C-dots 中含氧官能团的存在归因于金属离子与 C-dots 之间的有效络合。C-dots 对 Fe 离子的选择性传感特性为与铁代谢相关的生化分析和贫血症诊断提供了途径。
