Conformational ordering of apolar, chiral m-phenylene ethynylene oligomers

被引：63

作者：

Brunsveld, L

Prince, RB

Meijer, EW

Moore, JS

机构：

[1] Univ Illinois, Dept Chem, Urbana, IL 61801 USA

[2] Univ Illinois, Dept Mat Sci & Engn, Urbana, IL 61801 USA

[3] Eindhoven Univ Technol, Lab Macromol & Organ Chem, NL-5600 MB Eindhoven, Netherlands

来源：

ORGANIC LETTERS | 2000年 / 2卷 / 11期

关键词：

D O I：

10.1021/ol0056877

中图分类号：

O62 [有机化学];

学科分类号：

070303 ; 081704 ;

摘要：

[GRAPHICS] A series of m-phenylene ethynylene oligomers containing nonpolar, (S)-3,7-dimethyl-1-octanoxy side chains have been synthesized and studied. In apolar alkane solvents, oligomers of sufficient length (n > 10) were found to adopt a helical conformation with a large twist sense bias. In contrast, in chloroform the oligomers adopt a random coil conformation. Surprisingly, the strong twist sense bias was determined to be highly time dependent and is partially attributed to intermolecular aggregation.

引用

页码：1525 / 1528

页数：4

共 19 条

[1] MINIMUM ENERGY COMPACT STRUCTURES OF RANDOM SEQUENCES OF HETEROPOLYMERS [J].