Hydrogen-Bonded Aggregates of Oligoaramide-Poly(ethylene glycol) Block Copolymers

被引：31

作者：

Bohle, Anne ^{[1
]}

Brunklaus, Gunther ^{[1
]}

Hansen, Michael R. ^{[1
]}

Schleuss, Tobias W. ^{[2
]}

Kilbinger, Andreas F. M. ^{[2
]}

Seltmann, Jens ^{[3
]}

Spiess, Hans W. ^{[1
]}

机构：

[1] Max Planck Inst Polymer Res, D-55128 Mainz, Germany

[2] Johannes Gutenberg Univ Mainz, D-55099 Mainz, Germany

[3] Tech Univ Chemnitz, D-09111 Chemnitz, Germany

来源：

MACROMOLECULES | 2010年 / 43卷 / 11期

关键词：

SOLID-STATE NMR; CHEMICAL-SHIFT; PEPTIDES; DYNAMICS; DISTANCE; BEHAVIOR; PACKING; SYSTEMS; MODEL;

D O I：

10.1021/ma100501j

中图分类号：

O63 [高分子化学（高聚物）];

学科分类号：

070305 ; 080501 ; 081704 ;

摘要：

Rod-coil copolymers with an oligomeric rod aggregate on a nanometer length scale, which is important for many applications like e.g. organic photovoltaics. However, this aggregation behavior and the driving forces such as hydrogen bonding and pi-pi interactions, as well as the role of side groups, are not yet fully understood. Here, we investigated these noncovalent interactions in oligo(p-benzamide) poly(ethylene glycol) (OPBA-PEG) copolymers using solid-state NMR supported by wide-angle X-ray scattering (WAXS), differential scanning calorimetry (DSC). and polarization optical microscopy (POM). It was found that longer OPBAs form layered beta-sheet-like aggregates and that these are stabilized by amide hydrogen bonds in both unsubstituted OPBAs and OPBA-PEG rod-coil copolymers. The binding of the PEG also introduces a liquid crystalline phase. As a consequence, the local structural order is improved in the copolymer. Thus, by combining different methods of structural investigation, we were able to develop a model of local aggregation and packing in both the liquid crystalline and the solid state.

引用

页码：4978 / 4985

页数：8

共 48 条

[1] Rod-length dependent aggregation in a series of oligo(p-benzamide)-block-poly(ethylene glycol) rod-coil copolymers [J].