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Titolo:
FUNCTIONALIZED [2]ROTAXANES
Autore:
ASAKAWA M; ASHTON PR; IQBAL S; QUICK A; STODDART JF; TINKER ND; WHITE AJP; WILIAMS DJ;
Indirizzi:
UNIV BIRMINGHAM,SCH CHEM,POB 363 BIRMINGHAM B15 2TT W MIDLANDS ENGLAND UNIV BIRMINGHAM,SCH CHEM BIRMINGHAM B15 2TT W MIDLANDS ENGLAND UNIV LONDON IMPERIAL COLL SCI TECHNOL & MED,DEPT CHEM LONDON SW7 2AY ENGLAND BRITISH NUCL FUELS PLC,SPRINGFIELD WORKS PRESTON PR4 0JX LANCS ENGLAND
Titolo Testata:
Israel Journal of Chemistry
fascicolo: 4, volume: 36, anno: 1996,
pagine: 329 - 340
SICI:
0021-2148(1996)36:4<329:F[>2.0.ZU;2-0
Fonte:
ISI
Lingua:
ENG
Soggetto:
CONTROLLABLE MOLECULAR SHUTTLES; C-H...O; AROMATIC INTERACTION; HYDROGEN-BONDS; ROTAXANE; )2>CATENANE; )2>-ROTAXANES; POLYROTAXANES; CYCLODEXTRIN; RECOGNITION;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Science Citation Index Expanded
Citazioni:
63
Recensione:
Indirizzi per estratti:
Citazione:
M. Asakawa et al., "FUNCTIONALIZED [2]ROTAXANES", Israel Journal of Chemistry, 36(4), 1996, pp. 329-340

Abstract

The synthesis of a series of dumbbell-shaped compounds, which can actas a host (e.g., toward alkali metal cations) and as a guest (e.g., toward cyclobis(paraquat-p-phenylene)) in a supramolecular context is described. The self-assembly of [2]pseudorotaxanes and [2]rotaxanes, inwhich cyclobis(paraquat-p-phenylene) encircles polyether chains intercepted in their middles by a hydroquinone ring and terminated at each end by 12-crown-4, 15-crown-5, monoaza-18-crown-6, 18-crown-6, or adamantyl groups, is achieved using either threading, clipping, or slipping procedures. All the [2]pseudorotaxanes and [2]rotaxanes are characterized in solution by spectroscopic means and, in the case of two of the [2]rotaxanes, by X-ray crystal structures in the solid state. In thepresence of metal ions, [2]pseudorotaxanes carrying 12-crown-4 or 15-crown-5 stoppers can be disassembled in solution. The research shows how one kind of complexation can affect another kind of complexation-manifesting itself in a physical change in the system and so acting as aprototype of a potential molecular device.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 26/01/20 alle ore 22:07:47