Synthesis of Amylose-Polyether Inclusion Supramolecular Polymers by Vine-twining Polymerization Using Maltoheptaose-functionalized Poly(tetrahydrofuran) as a Primer-guest Conjugate

Tomonari Tanaka; Atsushi Tsutsui; Ryuya Gotanda; Shota Sasayama; Kazuya Yamamoto; Jun-ichi Kadokawa

doi:10.5458/jag.jag.JAG-2015_016

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Synthesis of Amylose-Polyether Inclusion Supramolecular Polymers by Vine-twining Polymerization Using Maltoheptaose-functionalized Poly(tetrahydrofuran) as a Primer-guest Conjugate

Tomonari Tanaka, Atsushi Tsutsui, Ryuya Gotanda, Shota Sasayama, Kazuya Yamamoto, Jun-ichi Kadokawa

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Keywords: amylose, supramolecular polymer, vine-twining polymerization, inclusion, primer-guest conjugate, phosphorylase

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2015 Volume 62 Issue 4 Pages 135-141

DOI https://doi.org/10.5458/jag.jag.JAG-2015_016

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Abstract

We achieved to synthesize a novel inclusion supramolecular polymer composed of continuum of amylose-poly(tetrahydrofuran) (PTHF) inclusion complexes by phosphorylase-catalyzed enzymatic polymerization using a maltoheptaose-PTHF conjugate according vine-twining polymerization manner. The ¹H NMR and X-ray diffraction measurements indicated the presence of the inclusion complex structure in the product. The GPC peak of the amylose segment, which was dissociated by heating the vine-twining polymerization product, shifted to the lower molecular weight region, compared with that of the product, supporting the structure of the inclusion supramolecular polymer. The product by the G-1-P/G₇-PTHF feed ratio = 100 was the supramolecular polymer composed of continuum of the amylose-PTHF inclusion complexes, whereas both inclusion complexes and amylose double helixes were present in the product by the G-1-P/G₇-PTHF feed ratio over 200.

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