Chinese Journal of Organic Chemistry >
Cocrystallization Boosted Performance of Room Temperature Phosphorescence Afterglows from Pure Organics
Received date: 2024-03-23
Revised date: 2024-04-24
Online published: 2024-05-11
Supported by
National Natural Science Foundation of China(52073172); National Natural Science Foundation of China(U22A20250)
Pure organic materials with persistent room-temperature phosphorescent (p-RTP) have attracted extensive attention due to their unique photophysical properties, low cost, design flexibility, and promising applications in such areas as biomedical imaging, disease diagnosis and treatment, sensing, and anti-counterfeiting encryption. Achieving efficient, long-lived, and tunable p-RTP afterglows, however, remains a significant challenge. Herein, inspired by the clustering- triggered emission (CTE) mechanism, utilizing the cocrystallization strategy, cocrystals with stoichiometric ratio of 1∶1 were prepared by employing melamine (MA) and cyclic acylureas of hydantoin (HA) and dihydrouracil (DHU) as electron donor and acceptors, respectively. Compared to the single-component crystals of MA, HA, and DHU, the cocrystals exhibited better color-tunability and longer lifetimes for p-RTP emissions, which are attributable to the synergistic effects of the widespread presence of C=O groups, lone pair electrons, multiple hydrogen bonds, appropriate charge transfer, and multiple emissive clusters. Furthermore, advanced anti-counterfeiting and encryption applications of these cocrystalss were demonstrated.
Yijing Cui , Tianwen Zhu , Qiang Zhang , WangZhang Yuan . Cocrystallization Boosted Performance of Room Temperature Phosphorescence Afterglows from Pure Organics[J]. Chinese Journal of Organic Chemistry, 2024 , 44(8) : 2588 -2594 . DOI: 10.6023/cjoc202401023
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