Controlling Phase Separation and Optical Properties in Conjugated Polymers through Selenophene-Thiophene Copolymerization

被引：226

作者：

Hollinger, Jon ^{[1
]}

Jahnke, Ashlee A. ^{[1
]}

Coombs, Neil ^{[1
]}

Seferos, Dwight S. ^{[1
]}

机构：

[1] Univ Toronto, Dept Chem, Toronto, ON M5S 3H6, Canada

来源：

JOURNAL OF THE AMERICAN CHEMICAL SOCIETY | 2010年 / 132卷 / 25期

基金：

加拿大自然科学与工程研究理事会;

关键词：

SOLAR-CELLS; REGIOREGULAR POLY(3-HEXYLTHIOPHENE); GRIGNARD METATHESIS; BLOCK-COPOLYMERS; BAND-GAP; MICROPHASE SEPARATION; FILM MORPHOLOGY; POLYMERIZATION; DIBLOCK; POLYTHIOPHENE;

D O I：

10.1021/ja103191u

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

Selenophene-thiophene block copolymers were synthesized and studied. The properties of these novel block copolymers are distinct from those of statistical copolymers prepared from the same monomers with a similar composition. Specifically, the block copolymers exhibit broad and red-shifted absorbance features and phase-separated domains in the solid state. Scanning transmission electron microscopy and topographic elemental mapping confirmed that the domains are either rich in selenophene or thiophene, indicating that the blocks of distinct heterocycles preferentially associate with one another in the solid state. This preference is surprising in view of the chemical similarities between repeat units. The overall results demonstrate a phase separation that is controlled by elemental differences. As a result of this phase separation, these novel conjugated block copolymers should find utility in a variety of studies and optoelectronics uses.

引用

页码：8546 / +

页数：3