Affiliation:
1. Strait Institute of Flexible Electronics (SIFE Future Technologies) Fujian Key Laboratory of Flexible Electronics Fujian Normal University and Strait Laboratory of Flexible Electronics (SLoFE) Fuzhou Fujian 350117 China
2. Key Laboratory of Flexible Electronics & Institute of Advanced Materials Nanjing Tech University Nanjing 211816 China
3. Pharmaceutical Analytical & Solid‐State Chemistry Research Center Shanghai Institute of Materia Medica Chinese Academy of Sciences Shanghai 201203 China
4. Frontiers Science Center for Flexible Electronics Shaanxi Institute of Flexible Electronics (SIFE) Northwestern Polytechnical University (NPU) 127 West Youyi Road Xi'an 710072 China
Abstract
AbstractUltralong organic phosphorescence (UOP) is essential for potential applications in bioelectronics and optoelectronics. However, the precise design of UOP materials remains a formidable challenge. Herein, a facile strategy is presented to confine dimeric chromophores for triggering UOP emission, based on the manipulation of the carbonyl, sulfonyl, and amino groups within organic phosphors. The experimental data reveal that saccharin analogs in crystals containing dimeric chromophores, confined by the (3D) hydrogen‐bonded networks, exhibit ultralong emission lifetime of up to 635 ms under ambient conditions. Whereas for saccharin analogue crystals lacking dimeric chromophores, the lifetime decreases to 54 ms, resulting in the absence of UOP emission. Moreover, the non‐toxic saccharin crystals with UOP have succeeded in drug anti‐counterfeiting. These findings will open a novel avenue for the design UOP materials and broaden the domain of UOP to diverse applications.
Funder
National Natural Science Foundation of China