Latest progress in liquid crystal (LC) field related to azo molecules incorporated to natural product-based
moieties for the improvement of LC texture and mesomeric phases has received great interest among researchers. LC
containing natural product-based moieties i.e. menthol, kojic acid, cholesterol and chalcone with stable azo and
azobenzene scaffolds with specific optical tunability has been widely reported for photo-active materials such as Liquid
Crystal Display (LCD), LC films, smart windows and other devices. This review discusses on the influence of
azobenzene, a renowned photo responsive and stable LC scaffold, in mesogenic phases due to photo-isomerization and
optical switching. The incorporation of mesomeric phases natural product moieties to azo molecules has improved the
properties of LC i.e from nematic phase to smectic phase with proper magnetic field alignment. Natural product-based LC
can be useful in numerous applications especially practical electronic or optic devices i.e. optical image storage, display
devices, solar cells, optical switching.
Keywords: liquid crystal, coumarin, chalcone, catalyst, menthol, nematic phase.
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