The intramolecular hydroacylation of 1,2-disubstituted alkenes was considered to be a challenging task due to the side reactions resulted from the lack of additional substituent at 1-position and the low activity caused by the steric hindrance of substituent at 2-position, and an asymmetric version has not been considered possible due to problems associated with the racemization of the products. We
We demonstrated the formation of a photoinduced surface relief grating using thin films comprising a photochromic molecular motor, 9-(2-phenyl-2,3-dihydro-cyclopenta[a]naphthalen-1-ylidene)-9H-fluorene. Results show that mass migration occurred by patterned light irradiation prepared from interfered laser beams and a photomask.
Control of Rotor Function in Light-Driven Molecular Motors
作者:Anouk S. Lubbe、Nopporn Ruangsupapichat、Giuseppe Caroli、Ben L. Feringa
DOI:10.1021/jo201583z
日期:2011.11.4
isomer. Kinetic studies of both motor and rotor functions of the two new compounds are given, using 1H NMR, 2D-EXSY NMR, and UV–vis spectroscopy. In addition, we present the development of a new method for introducing a range of aryl substituents at the α-carbon of precursors for molecular motors. The present study shows how the molecular system can be photochemically switched between a state of free rotor