Supramolecular Helical Miktoarm Star Polymers

被引：17

作者：

Deng, Ru ^{[1
,2
]}

Wang, Chengyuan ^{[1
,2
]}

Weck, Marcus ^{[1
,2
]}

机构：

[1] NYU, Dept Chem, 4 Washington Pl, New York, NY 10003 USA

[2] NYU, Mol Design Inst, 550 1St Ave, New York, NY 10003 USA

来源：

ACS MACRO LETTERS | 2022年 / 11卷 / 03期

基金：

美国国家科学基金会;

关键词：

LIVING POLYMERIZATION; TRIBLOCK COPOLYMERS;

D O I：

10.1021/acsmacrolett.1c00802

中图分类号：

O63 [高分子化学（高聚物）];

学科分类号：

070305 ; 080501 ; 081704 ;

摘要：

We report a hydrogen-bonded supramolecular miktoarm star polymer containing three distinct helical arms. Our design involves two helical poly(methacrylamide) arms connected by a barbituric acid (Ba) at the center, prepared through the reversible addition-fragmentation chain-transfer polymerization with a bifunctional agent. Together with a telechelic helical poly(isocyanide) end-functionalized with a Hamilton Wedge (HW) that is complementary to Ba, the two components assemble into an AB(2)-type star copolymer. The assembly is driven by the hydrogen bonding between HW and Ba, which is quantified by H-1 NMR titration and isothermal titration calorimetry. Gel-permeation chromatography provides evidence for the formation of the desired miktoann star architecture. This strategy of site-specific functionalization on helical polymers provides a modular approach to preparing nonlinear supramolecular ensembles with topologically diverse building blocks.

引用

页码：336 / 341

页数：6

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