| Autor: |
Atkinson, Samantha D. M., Almond, Matthew J., Hibble, Simon J., Hollins, Peter, Jenkins, Samantha L., Tobin, Mark J., Wiltshire, Karen S. |
| Zdroj: |
Physical Chemistry Chemical Physics (PCCP); 2003, Vol. 6 Issue: 1 p4-6, 3p |
| Abstrakt: |
The photodimerisation of single crystals of substituted cinnamic acid has been monitored continuously by infrared microscopy using a synchrotron source. The β-form of 2,4-dichloro-trans-cinnamic acid dimerises under ultraviolet irradiation to form the corresponding β-truxinic acid derivative in a reaction which follows strictly first order kinetics. By contrast the corresponding reactions in single crystals of β-2-chloro-trans-cinnamic acid and β-4-chloro-trans-cinnamic acid deviate somewhat from first order kinetics as a result of solid-state effects. In all three cases the reactions proceed smoothly from monomer to dimer with no hint of any reaction intermediate. |
| Databáze: |
Supplemental Index |
| Externí odkaz: |
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