A ditopic halogen-bond acceptor organizes a diiodooctafluorostilbene for a [2+2] photodimerization reaction to take place between two stilbene molecules in the solid state. The resultant cyclobutane product is functionalized with halogen atoms and undergoes self-assembly to form a channel-type host-guest compound that exhibits a very rare form of self-inclusion.
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Article Synopsis
- Crystals that can undergo two sequential reactions are uncommon, and this study focuses on a specific photoreactive compound as a template.
- The initial transformation involves the photodimerization of a bipyridyl compound, leading to the formation of crystals with a specific stoichiometry and a relatively nonreactive double bond distance.
- After exposure to UV light, a chain reaction facilitates the transformation of these crystals to a different isomer, which enhances the efficiency of the subsequent photodimerization process.
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