Poly(3-hexylthiophene) Molecular Bottlebrushes via Ring-Opening Metathesis Polymerization: Macromolecular Architecture Enhanced Aggregation

被引：46

作者：

Ahn, Suk-kyun ^{[1
]}

Pickel, Deanna L. ^{[1
]}

Kochemba, W. Michael ^{[5
]}

Chen, Jihua ^{[1
]}

Uhrig, David ^{[1
]}

Hinestrosa, Juan Pablo ^{[1
]}

Carrillo, Jan-Michael ^{[2
]}

Shao, Ming ^{[1
]}

Do, Changwoo ^{[3
]}

Messman, Jamie M. ^{[1
]}

Brown, W. Michael ^{[2
]}

Sumpter, Bobby G. ^{[1
,4
]}

Kilbey, S. Michael, II ^{[5
]}

机构：

[1] Oak Ridge Natl Lab, Ctr Nanophase Mat Sci, Oak Ridge, TN 37831 USA

[2] Oak Ridge Natl Lab, Natl Ctr Computat Sci, Oak Ridge, TN 37831 USA

[3] Oak Ridge Natl Lab, Biol & Soft Matter Div, Oak Ridge, TN 37831 USA

[4] Oak Ridge Natl Lab, Comp Sci & Math Div, Oak Ridge, TN 37831 USA

[5] Univ Tennessee, Dept Chem & Chem & Biomol Engn, Knoxville, TN 37996 USA

来源：

ACS MACRO LETTERS | 2013年 / 2卷 / 08期

基金：

美国国家科学基金会;

关键词：

REGIOREGULAR POLY(3-HEXYLTHIOPHENE); COPOLYMERS; POLYMERS; CATALYST; FUNCTIONALIZATION; BRUSHES;

D O I：

10.1021/mz4003563

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 facile synthetic strategy based on a grafting through approach to prepare well-defined molecular bottlebrushes composed of regioregular poly(3-hexylthiophene) (rr-P3HT) as the conjugated polymeric side chain. To this end, the exo-norbornenyl-functionalized P3HT macromonomer was synthesized by Kumada catalyst transfer polycondensation (KCTP) followed by postpolymerization modifications, and the resulting conjugated macromonomer was successfully polymerized by ring-opening metathesis polymerization (ROMP) in a controlled manner. The P3HT molecular bottlebrushes display an unprecedented strong physical aggregation upon drying during recovery, as verified by several analyses of the solution and solid states. This remarkably strong aggregation behavior is attributed to a significant enhancement in the number of pi-pi interactions between grafted P3HT side chains, brought about due to the bottlebrush architecture. This behavior is qualitatively supported by coarse-grained molecular dynamics simulations.

引用

页码：761 / 765

页数：5

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