Journal
CHEMISTRY-A EUROPEAN JOURNAL
Volume 24, Issue 17, Pages 4371-4381Publisher
WILEY-V C H VERLAG GMBH
DOI: 10.1002/chem.201705531
Keywords
host-guest systems; porphyrins; self-assembly; singlet oxygen; supramolecular photosensitizers
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Funding
- Spanish MINECO [CTQ2016-77989-P, CTQ2015-70795-P, CTQ2015-69363-P]
- Agence Nationale de la Recherche [ANR-14-CE08-0001 JCJC BOMBER]
- Generalitat de Catalunya [2017 SGR 264, 2014 SGR-1202]
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We demonstrate the benefits of using cofacial Zn-porphyrins as structural synthons in coordination-driven self-assembled prisms to produce cage-like singlet oxygen (O-1(2)) photosensitizers with tunable properties. In particular, we describe the photosensitizing and emission properties of palladium- and copper-based supramolecular capsules, and demonstrate that the nature of the bridging metal nodes in these discrete self-assembled prisms strongly influences O-1(2) generation at the Zn-porphyrin centers. The Pd-II-based prism is a particularly robust photosensitizer, whereas the Cu-II self-assembled prism is a dormant photosensitizer that could be switched to a ON state upon disassembly of the suprastructure. Furthermore, the well-defined cavity within the prisms allowed encapsulation of pyridine-based ligands and fullerene derivatives, which led to a remarkable guest tuning of the O-1(2) production.
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