Supramolecular self-assembling strategy for constructing cucurbit[6]uril derivative-based amorphous pure organic room-temperature phosphorescence complex featuring extra-high efficiency

• Published in: Chinese chemical letters Vol. 33; no. 2; pp. 877 - 880
• Main Authors: Li, Chunhui, Li, Xiuqin, Wang, Qiaochun
• Format: Journal Article
• Language: English
• Published: Elsevier B.V 01.02.2022; Key Laboratory for Advanced Materials,Joint International Research Laboratory of Precision Chemistry and Molecular Engineering,Feringa Nobel Prize Scientist Joint Research Center,Frontiers Science Center for Materiobiology and Dynamic Chemistry,Institute of Fine Chemicals,School of Chemistry and Molecular Engineering,East China University of Science and Technology,Shanghai 200237,China
• Subjects: Amorphous; Cucurbituril; Heavy-atom effect; Room temperature phosphorescence; Supramolecular self-assembling; Heavy-atom effect; Amorphous; Supramolecular self-assembling; Room temperature phosphorescence; Cucurbituril
• ISSN: 1001-8417; 1878-5964
• DOI: 10.1016/j.cclet.2021.08.011

The preparation of amorphous pure organic room-temperature phosphorescence materials with high efficiency is still a challenging task. Herein, we introduce a CB[6] derivative-based supramolecular self-assembling strategy. A water soluble and ellipsoidal deformed CB[6] derivative is used to self-assemble with 4-(4-bromophenyl)-1-methylpyridin-1-ium chloride, bromide and hexafluorophosphate in water. After freeze-drying, the obtained amorphous complexes exhibit brilliant green phosphorescence emission under ambient conditions, with phosphorescence efficiency up to 59%, 60% and 72%, respectively. This is the first report of amorphous non-polymeric pure organic room-temperature phosphorescence with such a high efficiency. In view of the dynamic self-assembling property, the complexes are responsive to water, which could enable information encryption. [Display omitted] An amorphous phCB[6]-based pure organic room-temperature phosphorescence supramolecular complexes was constructed using self-assembling strategy, and exhibited high efficiency (Φp ≥ 50%) under ambient conditions owing to the restriction of vibrational dissipation.