Highly Efficient Multicolor-Emitting Tetraphenylethylene-Based Organic Salts with Commercialization Prospects
By
Hu, HF (Hu, Huifen) [1] , [2] ; Zeng, D (Zeng, Dong) [1] , [2] ; Ming, JB (Ming, Jiang-Bo) [1] , [2] ; Yan, YK (Yan, Yukun) [1] , [2] ; Wang, W (Wang, Wei) [1] , [2]
DOI
10.1021/acsami.4c03180
Early Access
JUL 2024
Indexed
2024-07-10
Document Type
Article; Early Access
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Abstract
Since the discovery of aggregation-induced emission from tetraphenylethylene derivatives, various methods have been explored to prepare highly efficient multicolored luminescent materials. Herein, we report a simple and efficient strategy for constructing luminescent organic salts of the tetracationic luminogen, tetrapyridinium-tetraphenylethylene (T4Py-TPE4+), combined with seven di- and tetra-anionic aromatic sulfonate ligands. When aqueous solutions of the cationic luminogen and the anionic ligands were mixed, they rapidly aggregated into organic salts within seconds to minutes, giving yields of up to >90%. This was accompanied by an increase in the emission efficiency from similar to 58% to almost 100%, and the ability to tune the emission color between 511 and 586 nm. These improvements were mainly attributed to the strong electrostatic attractions between the cation and anions, which resulted in the formation of a rigid hydrophobic network of the T4Py-TPE4+ luminogen with various pi-conjugation lengths. Because these compounds are commercially available, this method opens the possibility of fabricating novel light-emitting materials for device fabrication and research