Title
Thermal E/Z Isomerization in First Generation Molecular Motors
Author
Shunsuke Kuwahara, Yuri Suzuki, Naoya Sugita, Mari Ikeda, Fumi Nagatsugi, Nobuyuki Harada, Yoichi Habata
Year
2018
Journal
The Journal of Organic Chemistry
Abstract
Determination of a thermal E/Z isomerization barrier of first generation molecular motors is reported. Stable (E)-1a directly converts to stable (Z)-1c without photochemical E/Z isomerization. The activation Gibbs energy of the isomerization was determined to be 123 kJ mol–1 by circular dichroism spectral changes. Density functional theory calculations show that (Z)-1c is ∼11.4 kJ mol–1 more stable than (E)-1a.
Full Article
Instrument
J-820
Keywords
Circular dichroism, Cotton effect, Kinetics, Organic chemistry