Lemieux, Robert P.; Schuster, Gary B. published the artcile< Photochemistry of axially chiral (arylmethylene)cycloalkanes: a search for suitable photoswitchable liquid crystalline materials>, Quality Control of 112-63-0, the main research area is arylmethylenecycloalkane photochem liquid crystal optical switch; optical absorption CD arylmethylenecycloalkane; photoracemization axially chiral arylmethylenecycloalkane.
A series of chiral (arylmethylene)cycloalkanes was synthesized in racemic and optically active form to examine their suitability for incorporation in a liquid crystal-based optical switch. Irradiation of these compounds with UV light leads to their rapid photoracemization and, in some cases, their simultaneous destruction. The absorption spectra and CD spectra of these optically active compounds were determined Chiral exciton coupling theory proves to be a good guide for predicting the magnitude of Δε and gλ (the Kuhn anisotropy factor). Addition of the optically active (arylmethylene)cycloalkanes to nematic liquid crystal materials induces cholesteric behavior. The helical twisting power (βM) was determined for each compound, and a limit of 90 μm was established for the detection of a long-pitch cholesteric liquid crystal. Irradiation of the cholesteric liquid crystals formed by addition of the optically active (arylmethylene)cycloalkanes induces the transition to a compensated nematic phase that is readily sensed by optical microscopy.
Journal of Organic Chemistry published new progress about Circular dichroism. 112-63-0 belongs to class esters-buliding-blocks, and the molecular formula is C19H34O2, Quality Control of 112-63-0.
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