Coiled-coil gel nanostructures of oligo(p-phenylenevinylene)s:: Gelation-induced helix transition in a higher-order supramolecular self assembly of a rigid π-conjugated system

被引：192

作者：

George, SJ ^{[1
]}

Ajayaghosh, A ^{[1
]}

Jonkheijm, P ^{[1
]}

Schenning, APHJ ^{[1
]}

Meijer, EW ^{[1
]}

机构：

[1] CSIR, Reg Res Lab, Photosci & Photon Div, Trivandrum 695019, Kerala, India

来源：

ANGEWANDTE CHEMIE-INTERNATIONAL EDITION | 2004年 / 43卷 / 26期

关键词：

helical structures; nanostructures; organogels self-assembly; supramolecular chemistry;

D O I：

10.1002/anie.200453874

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

Left-handed-helical nanoropes are formed from higher-order self-assemblies of chiral aggregates during the gelation of a rigid π-conjugated oligo(p-phenylenevinylene) with remote chiral handles (see picture; R = C 12H25). The concentration- and temperature-dependent CD-signal changes observed for these assemblies are indicative of a helix transition. This process is reminiscent of the folding and unfolding of helical biological macromolecules.

引用

页码：3422 / 3425

页数：4

共 64 条

[1] Gelation-assisted light harvesting by selective energy transfer from an oligo(p-phenylenevinylene)-based self-assembly to an organic dye [J].

Ajayaghosh, A ;

George, SJ ;

Praveen, VK .

ANGEWANDTE CHEMIE-INTERNATIONAL EDITION, 2003, 42 (03) :332-+

[2] First phenylenevinylene based organogels:: Self-assembled nanostructures via cooperative hydrogen bonding and π-stacking [J].

Ajayaghosh, A ;

George, SJ .

JOURNAL OF THE AMERICAN CHEMICAL SOCIETY, 2001, 123 (21) :5148-5149

[3]

Ajayaghosh A., 2003, Angew. Chem., V115, P346

[4]

[Anonymous], ANGEW CHEM

[5]

[Anonymous], 1998, ANGEW CHEM, V110, P2835

[6] Interconversion of single and double helices formed from synthetic molecular strands [J].

Berl, V ;

Huc, I ;

Khoury, RG ;

Krische, MJ ;

Lehn, JM .

NATURE, 2000, 407 (6805) :720-723

[7] Helical superstructures from charged poly(styrene)-poly(isocyanodipeptide) block copolymers [J].

Cornelissen, JJLM ;

Fischer, M ;

Sommerdijk, NAJM ;

Nolte, RJM .

SCIENCE, 1998, 280 (5368) :1427-1430

[8] Self-assembly of disk-shaped molecules to coiled-coil aggregates with tunable helicity [J].

Engelkamp, H ;

Middelbeek, S ;

Nolte, RJM .

SCIENCE, 1999, 284 (5415) :785-788

[9] Helical rosette nanotubes with tunable chiroptical properties [J].

Fenniri, H ;

Deng, BL ;

Ribbe, AE .

JOURNAL OF THE AMERICAN CHEMICAL SOCIETY, 2002, 124 (37) :11064-11072

[10] Charge-transfer phenomena in novel, dual-component, sugar-based organogels [J].

Friggeri, A ;

Gronwald, O ;

van Bommel, KJC ;

Shinkai, S ;

Reinhoudt, DN .

JOURNAL OF THE AMERICAN CHEMICAL SOCIETY, 2002, 124 (36) :10754-10758

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