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Updated: Jan 10, 2026

Design, Synthesis, and Photochemical Properties of Clickable Caged Compounds
Published on: October 15, 2019
Oxahelicene-Based Pd2L4 Cages: Synthesis, Optical Properties, and Guest Encapsulation
Amika Ido1, Ahmed S Gabr1, Kazuki Yamamoto1
1Department of Chemistry, Graduate School of Science, Osaka Metropolitan University, Sugimoto, Osaka 558-8585, Japan.
Abstract:
7-Oxa[5]- and 9-oxa[7]helicene-based ligands L1 and L2 bearing two pyridyl coordination sites were synthesized, and their self-assembly with Pd(II) ions into a Pd2L4 cages was demonstrated. The self-assembled cages retained high fluorescence quantum yields (ΦF = 0.50 for Pd2L14), exhibited significant circular dichroism (CD)/circularly polarized luminescence (CPL) activity for Pd2L24, and displayed guest-encapsulating behavior owing to the inherent oxahelicene ligands. Structural analysis via NMR, MS, and DFT calculations supported cage formation.
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