Title
Concentration effects in solid-state CD spectra of chiral atropisomeric compounds
Author
Lei Ding, Lirong Lin, Chengyong Liu, Hongkun Li, Anjun Qin, Yan Liu, Ling Song, Hui Zhang, Ben Zhong Tang, Yufen Zhao
Year
2011
Journal
New Journal of Chemistry
Abstract
Atropisomerism is one of the basic concepts in stereochemistry. Chiral crystals of stereochemically labile atropisomers that originated from Mirror Symmetry Breaking (MSB) can only be characterized by solid-state chiroptical techniques. Herein, solid-state circular dichroism and UV-Vis spectra of six atropisomeric compounds (most of them were obtained from MSB) have been studied. A concentration effect including a wavelength shift and inverse concentration-dependence has been found and preliminarily explained by the absorption flattening effect, scattering effect and the torsion in the molecular structures.
Instrument
J-810
Keywords
Circular dichroism, Stereochemistry