发光
聚合物
纳米颗粒
光致发光
持续发光
光电子学
化学工程
纳米晶
作者
Qiuqin Huang,Heqi Gao,Shuming Yang,Dan Ding,Zhenghuan Lin,Qidan Ling
出处
期刊:Nano Research
[Springer Nature]
日期:2020-04-01
卷期号:13 (4): 1035-1043
被引量:12
标识
DOI:10.1007/s12274-020-2740-x
摘要
Special attention has been paid to the organic afterglow materials (OAM) for their fascinating properties. However, poor stability at air and complicated structure design hinder the development of OAM. Herein, sol-gel, a facile and simple technique, is employed to synthesize a series of organic/inorganic hybrid nanocomposites (N1/SiO2, N2/SiO2, and N3/SiO2) by covalently linking three common aryl imides with crosslinked silica skeleton. These nanomaterials show excitation wavelength-dependent and colorful (yellow, red and green) afterglow of organic imides with long lifetime up to 1.1 s at air. Interestingly, the ultralong phosphorescence is ultrastable under various conditions: water, high temperature, UV irradiation and in vivo, due to the protection of inorganic silica. In particularly, heating to 500 °C does not quench the afterglow of organic luminophore in nanocomposites, but forms new ultralong phosphorescence originated from space-conjugation of silica and carbonyl. The afterglow nanomaterials display huge advantages in the applications of advanced anti-counterfeiting and bioimaging.
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