费斯特共振能量转移
荧光
聚合物
量子点
光化学
原子转移自由基聚合
猝灭(荧光)
聚合
共聚物
纳米技术
材料科学
高分子化学
化学
光学
物理
复合材料
作者
Chi‐Yue Huang,Meiran Feng,Xiaowei Zhu,Qinyu Zhou,Shanshan Zeng,Yifu Huang,Hefeng Zhang
出处
期刊:Macromolecules
[American Chemical Society]
日期:2021-12-14
卷期号:54 (24): 11497-11507
被引量:10
标识
DOI:10.1021/acs.macromol.1c01766
摘要
A polymeric precursor strategy was developed toward precise synthesis of uniform and size-tunable hairy fluorescent carbon dots (C-dots, CDs). The strategy was achieved by (i) the synthesis of core–shell 6-arm starlike block copolymers of PGMA-b-PMMA (poly(glucosyl methyacrylate), PGMA; poly(methyl methacrylate), PMMA), serving as a precursor using atom transfer radical polymerization (ATRP) and (ii) selective carbonization of the inner PGMA chains to generate hairy C-dots with PMMA blocks attaching on the surfaces. The resultant C-dots with tunable sizes showed blue to green fluorescence depending on the excitation, size, and concentration. The large size of the C-dots led to a significant red shift of fluorescence emission, which was attributed to enhanced intra-C-dot Förster resonance energy transfer (FRET) between the emitter homologues in a single C-dot. In addition, the FRET effect between C-dots was further confirmed by the aggregation-caused quenching characteristics and red shift of emission at high concentrations. Interestingly, different from the traditional fluorophores with photobleaching characteristics, C-dots showed recoverable photoabsorption capacity and enhanced fluorescence after the long-time exposure to UV light.
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