Host-Guest Complexation-Induced Aggregation Based on Pyrene-Modified Cyclodextrins for Improved Electronic Circular Dichroism and Circularly Polarized Luminescence.

Chenlin Tu, Wanhua Wu, Wenting Liang, Dongjing Zhang, Wei Xu, Shigang Wan, Wei Lu, Cheng Yang

Angewandte Chemie (International ed. in English) 2022 Jul 18

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Several γ-cyclodextrin (CD) derivatives mono- or di-substituted by pyrenes at the primary rim of the CD were demonstrated to aggregate into nano-strips in aqueous solutions, with the pyrene moieties interpenetrating into γ-CD cavities. The hydrophobic complexation-induced aggregation provides a rigid chiral environment for the pyrenes and leads to significant electronic circular dichroism (ECD) and circularly polarized luminescence (CPL) activities, giving unprecedently high gabs and glum values up to 4.3×10-2 and 5.3×10-2 , respectively. The aggregates lead to excimer emission with high quantum yields and show BCPL and Bi CPL up to 338. 6 M-1 cm-1 and 169.3 M-1 cm-1 , respectively. © 2022 Wiley-VCH GmbH.

Citation

Chenlin Tu, Wanhua Wu, Wenting Liang, Dongjing Zhang, Wei Xu, Shigang Wan, Wei Lu, Cheng Yang. Host-Guest Complexation-Induced Aggregation Based on Pyrene-Modified Cyclodextrins for Improved Electronic Circular Dichroism and Circularly Polarized Luminescence. Angewandte Chemie (International ed. in English). 2022 Jul 18;61(29):e202203541