无基质室温磷光硼氮共掺杂碳点用于信息加密和防伪

IF 2.5 3区 化学 Q2 CHEMISTRY, MULTIDISCIPLINARY
Yifang Gao, Shaogang Lei and Chuan Dong
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引用次数: 0

摘要

碳点长余辉现象近年来引起了人们的广泛关注。制备无基体且同时长寿命的余辉材料,特别是室温磷光材料,是一种简单有效的方法。本文提出了一种简单快速的一步水热法,以乙二胺四乙酸二钠盐和硼酸为原料合成无基质超长寿命室温磷光(URTP)硼氮共掺杂CDs (B, N-CDs)。制备的材料在408 nm处具有蓝色荧光发射,激发波长为319 nm。此外,B, n - cd显示的URTP的生存期为1.261秒。B和N元素促进N -π *跃迁和系统间交叉(ISC),能有效减小能隙,基于碳核表面的长链聚合物的形成和氢键骨架的存在对URTP的产生也起着至关重要的作用。这些B, n - cd的制备简便和独特的光学特性使它们成为信息加密和防伪应用的有希望的候选者。
本文章由计算机程序翻译,如有差异,请以英文原文为准。

Matrix-free room-temperature phosphorescent boron and nitrogen co-doped carbon dots for information encryption and anticounterfeiting†

Matrix-free room-temperature phosphorescent boron and nitrogen co-doped carbon dots for information encryption and anticounterfeiting†

The phenomenon of long afterglow of carbon dots has recently attracted great interest. It is still challenging to fabricate a matrix-free and simultaneously long-lived afterglow material, especially a room-temperature phosphorescent (RTP) material, through a simple and effective way. Herein, we propose a simple and rapid one-step hydrothermal method for synthesizing matrix-free ultralong-lifetime room-temperature phosphorescent (URTP) boron and nitrogen co-doped CDs (B, N-CDs) using ethylenediaminetetraacetic acid disodium salt and boric acid. The as-prepared material exhibited blue fluorescence emission at 408 nm with excitation at 319 nm. Furthermore, B, N-CDs displayed URTP with a lifetime of 1.261 s. B and N elements promote the n–π* transition and intersystem crossing (ISC) and can effectively reduce the energy gap, and the formation of long-chain polymers based on the carbon core surface and the existence of hydrogen-bonded skeletons also play a crucial role in the generation of URTP. The facile preparation and unique optical features of these B, N-CDs make them promising candidates for information encryption and anticounterfeiting applications.

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来源期刊
New Journal of Chemistry
New Journal of Chemistry 化学-化学综合
CiteScore
5.30
自引率
6.10%
发文量
1832
审稿时长
2 months
期刊介绍: A journal for new directions in chemistry
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