Counterion-induced translational isomerism in a bistable [2]rotaxane

被引：80

作者：

Laursen, BW

Nygaard, S

Jeppesen, JO

Stoddart, JF

机构：

[1] Univ Calif Los Angeles, Calif Nanosyst Inst, Los Angeles, CA 90095 USA

[2] Univ Calif Los Angeles, Dept Chem & Biochem, Los Angeles, CA 90095 USA

[3] Univ So Denmark, Dept Chem, DK-5230 Odense M, Denmark

来源：

ORGANIC LETTERS | 2004年 / 6卷 / 23期

关键词：

D O I：

10.1021/ol048518l

中图分类号：

O62 [有机化学];

学科分类号：

070303 ; 081704 ;

摘要：

Translational isomerization can be induced by changing the anions associated with a bistable rotaxane in which the tetracationic cyclophane (blue box), cyclobis(paraquat-p-phenylene), encircles a dumbbell component containing bispyrrolotetrathiafulvalene (green) and a dioxynaphthalene (red) recognition sites. The rotaxane was isolated as both its hexafluorophosphate and tris(tetrachlorobenzenediolato)phosphate(v) (TRISPHAT(-)) salts. Photophysical measurements and NMR spectroscopy carried out in acetone (CD3COCD3) and acetonitrile (CD3CN) solutions reveal that the much larger TRISPHAT(-) anion favors predominantly the encirclement of the green site by the blue box.

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页码：4167 / 4170

页数：4

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