Abstract
The single-crystal-to-single-crystal E Z photoisomerization of tiglic acid (2,3-dimethylacrylic acid) occurs in the supramolecular crystals CECR-HTA·2MeOH·1.5H2O (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.
Original language | English (US) |
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Pages (from-to) | 644-649 |
Number of pages | 6 |
Journal | Acta Crystallographica Section B: Structural Science |
Volume | 63 |
Issue number | 4 |
DOIs | |
State | Published - Jul 17 2007 |
Externally published | Yes |
Keywords
- E → Z photoisomerizations
- Host-guest systems
- Single-crystal-to-single-crystal transformation
- Topotactic reactions
ASJC Scopus subject areas
- General Biochemistry, Genetics and Molecular Biology