Reaction volume and enthalpy changes in photochemical reaction detected by the transient grating method; photodissociation of diphenylcyclopropenone
✍ Scribed by Masahide Terazima; Takashi Hara; Noboru Hirota
- Publisher
- Elsevier Science
- Year
- 1995
- Tongue
- English
- Weight
- 448 KB
- Volume
- 246
- Category
- Article
- ISSN
- 0009-2614
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✦ Synopsis
A method for the measurement of reaction volume (AV) and enthalpy (AH) changes of a photochemical reaction is presented based on the transient grating technique. Since AV and A H contributions are detected separately by the time-resolved manner, this new method does not require changing the temperature or the solvent. If the diffusion constants of the species are very different, the partial molar volume of each chemical species can he determined. This method is applied to the photodissociation reaction of diphenylcyclopropenone. This method also provides a very accurate and convenient way to measure the diffusion constant of gaseous molecules in liquids.