期刊
JOURNAL OF PHYSICAL CHEMISTRY A
卷 114, 期 27, 页码 7377-7381出版社
AMER CHEMICAL SOC
DOI: 10.1021/jp101703q
关键词
-
资金
- Israel Science Foundation [499/08]
- US National Science Foundation [CHE0843922]
- Direct For Mathematical & Physical Scien
- Division Of Chemistry [0843922] Funding Source: National Science Foundation
The [4 + 4] photodimerization of 1,4-dimethyl-2-pyridinone (A) in its molecular compound with 1,1,6,6-tetraphenyl-2,4-hexadiyne-1,6-diol (1) was investigated by irradiation of a single crystal of the compound. The conversion to the product in a single-crystal to single-crystal transformation enabled the determination of its crystal structure after each exposure cycle of 10-20 min with a pulsed 355 nm laser light. The unit cell changes as a function of the conversion were monitored and showed monotonic changes. The kinetics of the reaction was studied at two different temperatures (230 and 280 K) and revealed a sigmoidal behavior that could be explained by the JMAK model for crystal growth with a mechanism that is intermediate between random distribution of products in the crystal and the existence of growing nuclei. The Arrhenius plot provided calculated activation energy of 32.5 kJ/mol.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据