New application of the transient grating method to a photochemical reaction: The enthalpy, reaction volume change, and partial molar volume measurements
New application of the transient grating method to a photochemical reaction: The enthalpy, reaction volume change, and partial molar volume measurements
复制标题
DOI：
10.1021/jp960250v
复制
发表时间：
1996-06-13
影响因子：
--
通讯作者：
Terazima, M
中科院分区：
文献类型：
--
作者：
Hara, T;Hirota, N;Terazima, M
本文详细介绍了时间分辨瞬态光栅法在光化学反应焓变和反应体积变化测量中的新应用。根据信号的时间分布，这些量可以在一种特定的溶剂中在一定的温度和压力下独立地确定。通过与热透镜、光声等光热方法的比较，说明了该方法的优越性。测量了一氧化碳的偏摩尔体积以及二苯基环丙烯酮在几种烷烃和水溶液中光解的反应体积变化，并根据基质的等温压缩性讨论了其溶剂依赖性。
A new application of the time-resolved transient grating method for measuring the enthalpy and reaction volume changes in a photochemical reaction is described in detail. From the temporal profile of the signal, these quantities can be determined independently in one particular solvent at a temperature and a pressure. The advantages of this method become clear by a comparison with the previously used photothermal methods, such as the thermal lens and photoacoustic methods. The partial molar volumes of carbon monoxide as well as the reaction volume changes of the photodissociation of diphenylcyclopropenone in several alkanes and aqueous solution are measured, and its solvent dependence is discussed in terms of the isothermal compressibility of the matrix.