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Self‐Assembled Cofacial Zinc–Porphyrin Supramolecular Nanocapsules as Tuneable 1 O 2 Photosensitizers
Author(s) -
Colomban Cédric,
FuertesEspinosa Carles,
Goeb Sébastien,
Sallé Marc,
Costas Miquel,
Blancafort Lluís,
Ribas Xavi
Publication year - 2018
Publication title -
chemistry – a european journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.687
H-Index - 242
eISSN - 1521-3765
pISSN - 0947-6539
DOI - 10.1002/chem.201705531
Subject(s) - photosensitizer , porphyrin , synthon , supramolecular chemistry , photochemistry , singlet oxygen , nanocapsules , self assembly , photodynamic therapy , chemistry , zinc , fullerene , materials science , nanotechnology , crystallography , stereochemistry , oxygen , nanoparticle , crystal structure , organic chemistry
We demonstrate the benefits of using cofacial Zn–porphyrins as structural synthons in coordination‐driven self‐assembled prisms to produce cage‐like singlet oxygen ( 1 O 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 1 O 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 1 O 2 production.