pH-Controlled molecular switches and the substrate-directed self-assembly of molecular capsules with a calix[4]pyrrole derivative.
Chemistry
; 14(36): 11593-600, 2008.
Article
em En
| MEDLINE
| ID: mdl-19034943
ABSTRACT
10alpha,20alpha-Bis(4-nitrophenyl)calix[4]pyrrole (1) forms 11 complexes with anions of selected aromatic hydroxy acids in which the host orientation within the guest is controlled by a change in the pH value. Some bis-anionic guests, including those obtained from 4-hydroxybenzoic acid, 1,4- and 1,3-benzenedicarboxylic acids, induce the self-assembly of molecular capsules involving two molecules of the receptor. (1)H NMR data and solid-state structures of the 11 complex of 1 with p-C(6)H(4)(COOH)(COO(-))(+)NMe(4) and the 21 capsule [(1)(2)m-C(6)H(4)(COO(-))(2)((+)NMe(4))(2)] provide structural details in solution and in the solid state.
Texto completo:
1
Base de dados:
MEDLINE
Idioma:
En
Ano de publicação:
2008
Tipo de documento:
Article