Wednesday, September 6, 2017

Photodriven single-crystal-to-single-crystal transformation


Focusing on photoinduced crystal-to-crystal transformation system and architecture dependent property changes.
Photodriven isomerization of azobenzene cores.
Photodriven open-ring↔closed-ring transformations of diarylethene cores.
Photodriven [2 + 2] cycloadditions of olefin pair cores.
Other types of photoactive crystals.


Molecular architectures containing photosensitive units respond to light, giving dramatic variations of their structure. In particular, the crystalline packing phases offer the possibility of significant advances in crystal design and the understanding of solid-state photoreactivity. In this review we mainly focus on three different photoreactivity patterns, namely the isomerization of azobenzene, open-ring↔closed-ring transformations of diarylethenes and cycloadditions of olefin pairs, as well as some examples of photoreactive crystals outside these types. Many interesting phototriggered functionalities are documented herein, such as photo-tuning of guest adsorption of azobenzene or diarylethene-based porous frameworks and crystalline organic polymers generated by photo-cycloaddition reactions taking place in the different networks.

Graphical Abstract

Unlabelled figure


Crystal transformation
Cycloaddition reaction

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