Citation: Jie Niu, Xuan Wu, Jie Yu, Zhuo Lei, Ying-Ming Zhang, Li-Hua Wang, Yu Liu. Cucurbit[7]uril-confined cascade assembly of cyclodextrin phosphor derivative achieving multicolor delayed luminescence for information encryption[J]. Chinese Chemical Letters, ;2026, 37(5): 111419. doi: 10.1016/j.cclet.2025.111419 shu

Cucurbit[7]uril-confined cascade assembly of cyclodextrin phosphor derivative achieving multicolor delayed luminescence for information encryption

Jie Niu ^{a, 1} ,
Xuan Wu ^{b, 1} ,
Jie Yu ^a ,
Zhuo Lei ^a ,
Ying-Ming Zhang ^{a, *,} ,
Li-Hua Wang ^a ,
Yu Liu ^{a, *,}

a.
College of Chemistry, State Key Laboratory of Elemento-Organic Chemistry, Nankai University, Tianjin 300071, China
b.
School of Chemistry and Chemical Engineering, Yangzhou University, Yangzhou 225002, China

ymzhang@nankai.edu.cn

yuliu@nankai.edu.cn

Received Date: 15 March 2025
Revised Date: 15 May 2025
Accepted Date: 6 June 2025
Available Online: 10 June 2025

Figures(6)

Macrocyclic cascade supramolecular assembly could significantly enhance the fluorescence/phosphorescence resonance energy transfer (F/PRET) efficiency through macrocyclic and spatial dual confinement effect. Herein, we reported a cascade supramolecular assembly containing 6-bromoisoquinolinium-modified permethylated cyclodextrin (BQ-PCD), cucurbit[7]uril (CB[7]), and tetra(4-sulfonatophenyl)porphyrin (TPPS), in which the enhanced PRET from 6-bromoisoquinolinium (BQ) to TPPS could be achieved through the dual macrocyclic confinement for multicolor delayed luminescence and information encryption. In TPPS$\subset$BQ-PCD$\subset$CB[7], pure organic room temperature phosphorescence of BQ-PCD at 530 nm is induced by CB[7] macrocyclic confinement, which further transferred to TPPS via spatial confinement, achieving delayed fluorescence at 645 and 715 nm with high PRET efficiency and quantum yield (17.9%). Meanwhile, reversible TPPS concentration-dependent multicolor luminescence was achieved in presence of competitive guest (methionine peptide), followed by porphyrin-photosensitization process, being applied in information encryption. This research presents a facile strategy for efficient PRET through macrocyclic cascade confinement assembly.
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