乙烯醇
磷光
材料科学
荧光粉
氢键
无定形固体
色散(光学)
兴奋剂
化学工程
纳米技术
聚合物
有机化学
化学
光电子学
分子
复合材料
荧光
物理
量子力学
光学
工程类
作者
DeLiang Wang,Hsien-Shun Wu,Junyi Gong,Yu Xiong,Qian Wu,Zheng Zhao,Lei Wang,Dong Wang,Ben Zhong Tang
出处
期刊:Materials horizons
[The Royal Society of Chemistry]
日期:2022-01-01
卷期号:9 (3): 1081-1088
被引量:41
摘要
Organic phosphors exhibiting room-temperature phosphorescence (RTP) in the amorphous phase are promising candidates for optoelectronic and biomedical applications. In particular, noncovalently embedding organic phosphors into a poly(vinyl alcohol) (PVA) matrix has emerged as the most commonly used yet effective approach to obtain amorphous organic RTP materials. While the role of intermolecular hydrogen-bonding interactions in determining the RTP properties of doping PVA systems has been well documented, we show that electrostatic and dispersion interactions contribute crucially to the ultralong RTP properties of doping PVA films. This impressive outcome reveals the nature of non-covalent interactions existing in doping PVA systems for the first time. We demonstrate this through detailed experimental and computational studies for a series of hydrogen-bond crosslinked PVA films where star-shaped organic phosphors containing active groups of carboxy, hydroxy, and amino act as multisite crosslinkers for the construction of extensive hydrogen-bonding networks. More importantly, we successfully obtain an ultralong RTP lifetime of up to 1.74 s by tuning the electrostatic and dispersion interactions between organic phosphors and the PVA matrix through simply modifying active groups of organic phosphors. This instructive work will provide new guiding principles for the exploration of amorphous organic RTP systems.
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