Abstract
This Perspective describes current research into the photochemistry of zeolites, pointing out issues yet to be resolved and suggesting future directions of investigation. The fascinating host materials are known to act as a support for guest ions, molecules, or clusters both within their large interior cage/channel networks and on their exterior surfaces, together providing rich chemistry. Two techniques have proven particularly successful for their study, diffuse reflectance transient absorption spectroscopy and optical microscopy. The various properties revealed by these techniques include intracrystalline and intercrystalline migration, migration-assisted photochemical reactions, and heterogeneous distribution of guest molecules among and within crystals.
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