【摘要】 以聚丙烯酸和乙二胺为原料,通过水热法合成了碳化聚合物点(CPDs),利用荧光光谱、X射线光电子能谱和时间相关单光子计数等手段对3种不同碳化温度下形成的CPDs进行表征;采用375 nm的紫外光对200℃下合成的CPDs进行光漂白,分析了CPDs漂白前后的荧光寿命以及基团的变化,探究了该CPDs的发光机理,确定该CPDs具有碳核态和分子态共同控制的双发光中心.更多还原

【Abstract】 Polyacrylic acid and ethylenediamine were used as precursors to synthesize carbonized polymer dots( CPDs) by hydrothermal method. Fluorescence spectroscopy and time-dependent single photon counting were used to characterize the CPDs formed under different carbonization temperatures( 200,240 and 280 ℃) . The luminescence mechanism of these CPDs was explored by comparing their fluorescence lifetimes and the photobleaching process under a 375 nm light. The results prove that the luminescence of these CPDs are contributed by both the carbon core state and the molecular state.更多还原