Oxahelicene-Based Pd <sub>2</sub> L <sub>4</sub> Cages: Synthesis, Optical Properties, and Guest Encapsulation
7-Oxa[5]- and 9-oxa[7]helicene-based ligands <b>L1</b> and <b>L2</b> bearing two pyridyl coordination sites were synthesized, and their self-assembly with Pd(II) ions into a Pd<sub>2</sub>L<sub>4</sub> cages was demonstrated. The self-assembled cages retained high fluorescence quantum yields (Φ<sub>F</sub> = 0.50 for <b>Pd</b><sub><b>2</b></sub><b>L1</b><sub>4</sub>), exhibited significant circular dichroism (CD)/circularly polarized luminescence (CPL) activity for <b>Pd</b><sub><b>2</b></sub><b>L2</b><sub>4</sub>, and displayed guest-encapsulating behavior owing to the inherent oxahelicene ligands. Structural analysis via NMR, MS, and DFT calculations supported cage formation.
Authors
- Masayuki Gon (ORCID: https://orcid.org/0000-0002-5540-5908)
- Akihiro Tsurusaki (ORCID: https://orcid.org/0000-0002-9392-539X)
- Kazuo Tanaka (ORCID: https://orcid.org/0000-0001-6571-7086)
- Ken Kamikawa (ORCID: https://orcid.org/0000-0002-7844-4993)
- Kazuki Yamamoto
- Ahmed Gabr (ORCID: https://orcid.org/0000-0003-2347-6995)
- A. Ido
- Maki Teraoka
Institutions
- Kyoto University (JP)
- Osaka City University (JP)
Publication Details
- Journal
- Organic Letters
- Published
- 2025-11-27
- DOI
- https://doi.org/10.1021/acs.orglett.5c04489
- Primary Topic
- Synthesis and Properties of Aromatic Compounds
- Type
- article
- Field-Weighted Citation Impact
- 0.00