【摘要】 用一锅法合成了具有高量子产率,绿光发射,低毒性的碳化聚合物点(CPDs)。利用紫外可见光谱、单光子荧光光谱、双光子荧光光谱和傅里叶变换红外光谱等多种光谱手段对CPDs的表面状态进行了表征。此外,还利用能提供超快动力学过程信息的瞬态吸收光谱,证明了CPDs表面状态随pH值的变化。本研究有利于对碳点的表面态进行更加深入的理解,同时,为进一步研究碳点的发光特性及其传感应用提供了参考。更多还原

【Abstract】 In this study, carbonized polymer dots(CPDs) with high quantum yield, green emission and low toxicity was synthesized by one pot hydrothermal method. The surface state of CPDs can be effectively controlled by the change of pH, which were characterized by various spectroscopies, involving UV-vis spectrum, one-photon photoluminescence spectrum, two-photon photoluminescence spectrum and Fourier transform infrared spectrum(FT-IR). Transient absorption spectroscopy that can give information of ultrafast dynamic process were used for proving the changes of the surface states of CPDs with pH values. This study is a deeper understanding of the surface states of carbon dots, which will be a reference for tuning the luminescent features of the CPDs and their sensing applications.更多还原