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Biosynthesis of Liquid Crystalline Azo‐Polyesters

Main‐chain thermotropic liquid‐crystalline aromatic azobenzene polyesters containing rigid 4,4′‐dihydroxyazobenzene mesogens and flexible spacers with varying lengths were synthesized using a chemo‐enzymatic method. The enzyme‐catalyzed approach is based on immobilized candida antarctica lipase B. The resulting polyesters were characterized by 1H‐NMR, 13C‐NMR, differential scanning calorimetry (DSC), and polarized light optical microscopy (POM).