Solid-State Carbon Dots with Red Fluorescence and Efficient Construction of Dual-Fluorescence Morphologies

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Jiangling HeYingliang Liu

Abstract

Stable solid-state red fluorescence from organosilane-functionalized carbon dots (CDs) with sizes around 3 nm is reported for the first time. Meanwhile, a novel method is also first reported for the efficient construction of dual-fluorescence morphologies. The quantum yield of these solid-state CDs and their aqueous solution is 9.60 and 50.7%, respectively. The fluorescence lifetime is 4.82 ns for solid-state CDs, and 15.57 ns for their aqueous solution. These CDs are detailedly studied how they can exhibit obvious photoluminescence overcoming the self-quenching in solid state. Luminescent materials are constructed with dual fluorescence based on as-prepared single emissive CDs (red emission) and nonfluorescence media (starch, Al2 O3 , and RnOCH3 COONa), with the characteristic peaks located at nearly 440 and 600 nm. Tunable photoluminescence can be successfully achieved by tuning the mass ratio of CDs to solid matrix (such as starch). These constructed dual-fluorescence CDs/starch composites can also be applied in white light-emitting diodes with UV chips (395 nm), and oxygen sensing.

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Citations

Feb 15, 2019·Chemical Record : an Official Publication of the Chemical Society of Japan ... [et Al.]·Jianying WangLei Wang
Mar 19, 2019·Chemical Society Reviews·Chao HuYa-Ping Sun
Jul 8, 2020·Physical Chemistry Chemical Physics : PCCP·Hyo Jeong YooDo Hyun Kim
Feb 24, 2020·Journal of Fluorescence·Gaurav Gopal NaikAlakh N Sahu
Feb 21, 2019·Journal of Materials Chemistry. B, Materials for Biology and Medicine·Yanjuan LiBingfu Lei
Nov 21, 2019·Journal of Materials Chemistry. B, Materials for Biology and Medicine·Xiaohua ZhuShouzhuo Yao
Jul 3, 2019·Advances in Colloid and Interface Science·Bin Bin ChenCheng Zhi Huang
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Jan 12, 2021·Journal of Colloid and Interface Science·Yingfang TaoYuhua Wang
Jan 11, 2021·Spectrochimica Acta. Part A, Molecular and Biomolecular Spectroscopy·Hai-Jiao WangQi-Qing Zhang
May 8, 2021·The Journal of Physical Chemistry Letters·Yunyang ZhaoSongnan Qu
Nov 23, 2017·ACS Applied Materials & Interfaces·Tanglue FengBai Yang
Dec 31, 2020·ACS Central Science·Junjun LiuBai Yang
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May 25, 2018·ACS Applied Materials & Interfaces·Tianyi ZhangChangli Lü
Sep 10, 2021·The Journal of Physical Chemistry Letters·Danyang ZhangLiang Zhou
Dec 16, 2021·The Journal of Physical Chemistry Letters·Zhiyong ZhengBaolai Liang

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