磷光
卤素
吡啶
发光
光化学
化学
卤化物
量子产额
溶剂
荧光
材料科学
无机化学
有机化学
光电子学
光学
物理
烷基
作者
Jun‐Ting Mo,Zheng Wang
标识
DOI:10.1016/j.cclet.2023.109360
摘要
The research of long persistent luminescence (LPL) materials has yield brilliant results in many fields. However, the efforts are still needed for the regulation of the LPL performance. In this work, a series of LPL metal organic halides with rich halogen-bond interactions, Py-CdX2 (X = Cl, Br, I) were synthesized through self-assembly by CdX2 and pyridine solvent. The steady-state emission redshifted and phosphorescence lifetime declined as the halogen atoms are aggravated. Three halides exhibit adjustable emission from blue to green and multiple phosphorescence from green to yellow at room temperature by changing the excitation wavelengths. Surprisingly, Py-CdX2 can emit the visible color-tunable LPL from green to yellow after removing different excitation sources at ambient conditions. Combing the results of theoretical calculation and experimental analysis, it is found that heavy atom effect and the rich intermolecular halogen bond help realize LPL and multiple triplet states originated from the pyridine ring and the halogens.
科研通智能强力驱动
Strongly Powered by AbleSci AI