Mu Ying, Wang Ning, Sun Zaicheng, Wang Jing, Li Jiyang, Yu Jihong
State Key Laboratory of Inorganic Synthesis and Preparative Chemistry , College of Chemistry , Jilin University , Changchun 130012 , P. R. China . Email:
Beijing Key Laboratory for Green Catalysis and Separation , Department of Chemistry and Chemical Engineering , Beijing University of Technology , Beijing , 100124 , P. R. China.
Chem Sci. 2016 Jun 1;7(6):3564-3568. doi: 10.1039/c6sc00085a. Epub 2016 Feb 12.
Hydrophilic N-doped carbogenic nanodots (denoted as CNDs) have been prepared from a -methylpiperazine-templated zeolite precursor by calcination and NaOH treatment. The isolated CNDs exhibit tunable photoluminescence according to the concentration and pH value of aqueous dispersions of the CNDs. Fine-tuning of the fluorescence emission wavelength across the entire visible spectrum can be easily achieved by varying the concentration of the CND dispersions. Meanwhile, both the emission wavelength and intensity of the photoluminescence can be tuned by controlling the pH value of the CND dispersion. The pyrolysis of organic templates confined in nanoporous zeolites represents a new approach to controlling the optical properties of CNDs, which may open more opportunities in applications such as multimodal sensing and full-color displays.
通过煅烧和氢氧化钠处理，由α-甲基哌嗪模板化的沸石前驱体制备了亲水性氮掺杂碳纳米点（记为CNDs）。分离出的CNDs根据其水分散体的浓度和pH值表现出可调谐的光致发光。通过改变CND分散体的浓度，可以轻松实现整个可见光谱范围内荧光发射波长的微调。同时，通过控制CND分散体的pH值，可以调节光致发光的发射波长和强度。限制在纳米多孔沸石中的有机模板的热解代表了一种控制CNDs光学性质的新方法，这可能会在多模态传感和全彩显示等应用中带来更多机会。
