Singlet oxygen (1O2), highly reactive oxygen species has attracted much attention due to its practical applications such as industrial wastewater treatment, photochemistry, and photodynamic therapy. While progress has been made to advance photosensitizers to generate singlet oxygen, more recently the design of a system where the production of singlet oxygen is controllable or activatable, upon environmental changes or interaction with biomolecules or nanomaterials, has attracted growing attention. By constructing a classical pillar-layer structure with mixed linkers, we have developed two photochromic MOFs, photochromic porous coordination network (PC-PCN) and singlet oxygen generating porous coordination network (SO-PCN). A photochromic reaction has been successfully demonstrated in PC-PCN while retaining its single crystallinity. In particular, as a solid-state material which inherently bears the photochromic switch and photosensitizer, SO-PCN has demonstrated control of 1O2 generation. Meanwhile, SO-PCN shows catalytic activity towards photooxidation of 1,5-dihydroxynaphthalene.

Photochromic metal–organic frameworks toward control of singlet oxygen generation

249th National Meeting (2015)

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