高等学校化学学报Issue(2)：293-298,6.DOI:10.7503/cjcu20140559
两类荧光可调碳点的制备及在防伪油墨上的应用
Two Types of Carbon Dots with Excitation-dependent Emissions and Their Application as Anti-counterfeit Ink
摘要
Abstract
Carbon dots with excitation-dependent emission were prepared using different chlorohydrocarbon and amine as reactants under the same reaction condition. The carbon dots 1 and carbon dots 2 had selective emissions in a range of 423—556 nm and 460—555 nm, respectively, in addition, their fluorescence intensity changes could be modeled by a Gaussian-like curve with the red shift of excitation wavelengths ( denoted as type Ⅰ carbon dots). The carbon dots 3 had emissions in a broad color range over the entire visible region (407—670 nm), moreover, their fluorescence intensities had irregular change with the excitation wavelengths ( denoted as typeIIcarbon dots). Then, fluorescence spectroscopy, transmission electron microscopy, X-ray photoelectron spectroscopy and infrared spectroscopy were explored to analyze their structural and spectral characteristics in detail. For the typeIIcarbon dots, except for the size effect, the surface functional groups, such as CO and CN, could efficiently introduce new energy levels for electron transitions and result in the continuously adjustable full color emissions. Further, the type II carbon dots were demonstrated as ideal candidates for high security anti-counterfeit purpose.关键词
碳点/荧光/表面态/防伪油墨Key words
Carbon dot/Fluorescence/Surface-state/Anti-counterfeiting ink分类
化学化工引用本文复制引用
聂辉,李敏杰,鞠博,张晓安..两类荧光可调碳点的制备及在防伪油墨上的应用[J].高等学校化学学报,2015,(2):293-298,6.基金项目
国家自然科学基金(批准号:51001020,21072025)资助 （批准号:51001020,21072025）
