Precise recognition and separation of polymers through the formation of inclusion complexes using amylose-forming polymerization field

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Amylose, a linear polysaccharide with helical structure linked through (1→4)-α-glycosidic linkages, is a well-known host compound that forms inclusion complexes with relatively lower molecular weight compounds. So far, we have reported the preparation method of the inclusion complexes composed of amylose and the polymeric compounds using phosphorylase-catalyzed polymerization forming amylose in the presence of the guest polymers. This polymerization method is named "vine-twining polymerization". In this study, we found that amylose selectively included poly (tetrahydrofuran) (PTHF) or poly (δ-valerolactone) (PVL) from a mixture of two resemblant polyethers, i.e., poly (oxetane) (POXT) and PTHF, or a mixture of two resemblant polyesters, i.e., PVL and poly (ε-caprolactone) (PCL) in vine-twining polymerization. In addition, it was found that amylose selectively included a specific range of molecular weights (MWs) in any PTHFs when the vine-twining polymerization was performed in the presence of some PTHFs with different average MWs.