Supramolecular triblock copolymers containing complementary nucleobase molecular recognition

Brian D. Mather, Margaux B. Baker, Frederick L. Beyer, Michael A.G. Berg, Matthew D. Greeny, Timothy Edward Long*

*この研究の対応する著者

研究成果: Article査読

107 被引用数 (Scopus)

抄録

A novel difunctional alkoxyamine initiator, DEPN2, was synthesized and utilized as an efficient initiator in nitroxide-mediated controlled radical polymerization of triblock copolymers. Complementary hydrogen-bonding triblock copolymers containing adenine (A) and thymine (T) nucleobase-functionalized outer blocks were synthesized. These thermoplastic elastomeric block copolymers contained short nucleobase-functionalized outer blocks (Mn ∼ 1K-4K) and n-butyl acrylate rubber blocks of variable length (Mn ∼ 14K-70K). Hydrogen-bonding interactions were observed for blends of the complementary nucleobase-functionalized block copolymers in terms of increased specific viscosity as well as higher scaling exponents for specific viscosity as a function of solution concentration. In the solid state, the blends exhibited evidence of a complementary A-T hard phase, which formed upon annealing, and dynamic mechanical analysis (DMA) revealed higher softening temperatures. Morphological development of the block copolymers was studied using SAXS and AFM, which revealed intermediate interdomain spacings and surface textures for the blends compared to the individual precursors. Hydrogen-bonding interactions enabled the compatibilization of complementary hydrogen-bonding guest molecules such as 9-octyladenine.

本文言語English
ページ(範囲)6834-6845
ページ数12
ジャーナルMacromolecules
40
19
DOI
出版ステータスPublished - 2007 9月 18
外部発表はい

ASJC Scopus subject areas

  • 材料化学

フィンガープリント

「Supramolecular triblock copolymers containing complementary nucleobase molecular recognition」の研究トピックを掘り下げます。これらがまとまってユニークなフィンガープリントを構成します。

引用スタイル