Second Generation Light-Driven Molecular Motors. Unidirectional Rotation Controlled by a Single Stereogenic Center with Near-Perfect Photoequilibria and Acceleration of the Speed of Rotation by Structural Modification
作者:Nagatoshi Koumura、Edzard M. Geertsema、Marc B. van Gelder、Auke Meetsma、Ben L. Feringa
DOI:10.1021/ja012499i
日期:2002.5.1
and thermal isomerization processes of the motors were studied by NMR and CD spectroscopy. The new molecularmotors all show two cis-trans isomerizations upon irradiation, each followed by a thermal helix inversion, resulting in a 360 degrees rotation around the central double bond of the upper part with respect to the lower part. The direction of rotation is controlled by a single stereogenic center