期刊
ADVANCED SCIENCE
卷 10, 期 18, 页码 -出版社
WILEY
DOI: 10.1002/advs.202300543
关键词
aggregation; carbon dots; fluorescent mechanism; m-hydroxybenzaldehyde; multicolor emission; supramolecular
This paper presents a method to obtain multicolor luminescent carbon dots by pyrolysis under different reaction conditions, revealing the forbidden band tuning and formation mechanism of carbon dots. Different acid-base conditions lead to different reaction paths of the precursors, forming molecular fluorophores with different conjugated structures, which eventually form carbon dots and enhance the photoluminescence of the system by inhibiting the movement of the fluorescent centers.
Reported in 2004, carbon dots (CDs) have been widely used in various fields due to their excellent optical properties. However, the mechanism of their fluorescence modulation is still a controversial issue, which also seriously affects the further development of carbon dots. In this paper, m-hydroxybenzaldehyde is used as a raw material to obtain multicolor luminescent CDs by pyrolysis under different reaction conditions, thereby revealing the forbidden band tuning and formation mechanism of CDs. Different acid-base conditions lead to different reaction paths of the precursors, forming molecular fluorophores with different conjugated structures, which aggregate to eventually form CDs and further enhance the photoluminescence of the system by inhibiting the movement of the fluorescent centers.
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