Self-Assembled Cofacial Zinc-Porphyrin Supramolecular Nanocapsules as Tuneable 1O2 Photosensitizers
Self-Assembled Cofacial Zinc-Porphyrin Supramolecular Nanocapsules as Tuneable 1O2 Photosensitizers
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DOI：
10.1002/chem.201705531
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发表时间：
2018-03-20
影响因子：
4.3
通讯作者：
Ribas, Xavi
中科院分区：
文献类型：
--
作者：
Colomban, Cedric;Fuertes-Espinosa, Carles;Ribas, Xavi
我们证明了在配位驱动自组装棱镜中使用界面锌卟啉作为结构合成子来制备具有可调性能的笼状单线态氧(O-1(2))光敏剂的好处。特别是，我们描述了钯和铜基超分子胶囊的光敏化和发射性质，并证明了这些离散的自组装棱镜中桥接金属节点的性质强烈地影响了锌卟啉中心的O-1(2)的生成。基于Pd-II的棱镜是一种特别坚固的光敏剂，而铜-II自组装棱镜是一种休眠的光敏剂，在拆卸超结构时可以切换到开启状态。此外，棱镜内明确的空腔允许包裹基于吡啶的配体和富勒烯衍生物，这导致了O-1(2)产物的显著客体调谐。
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.