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Single-crystal-to-single-crystal E → Z isomerization of tiglic acid in a supramolecular framework by Shao-Liang Zheng; Marc Messerschmidt; Philip Coppens is a Chemistry article available to read on EtoBox.

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The single-crystal-to-single-crystal __E__ → __Z__ photoisomerization of tiglic acid (2,3-dimethylacrylic acid) occurs in the supramolecular crystals CECR–HTA·2MeOH·1.5H~2~O (1) (where HTA = tiglic acid, CECR = __C__-ethylcalix[4]resorcinarene) with the preservation of the crystal lattice, indicating the `scaffolding effect' of the molecular framework, which holds the crystal together notwithstanding the change in shape of the embedded guest molecules. A photostationary state is reached at a concentration of __ca__ 30% of the __Z__ isomers. A kinetic analysis shows the __Z__ → __E__ back-reaction to proceed with a larger rate constant than the __E__ → __Z__ isomerization.

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Author

Shao-Liang Zheng; Marc Messerschmidt; Philip Coppens

Publisher

International Union of Crystallography; Blackwell Publishing Inc.; International Union of Crystallography (IUCr) (ISSN 0108-7681)

Published

2007

Language

EN

Field

Chemistry (Physical Sciences)