Precision Switching in a Discrete Supramolecular Assembly: Alkali Metal Ion-Carboxylate Selectivities and the Cationic Hofmeister Effect.
Chemphyschem
; 19(18): 2285-2289, 2018 09 18.
Article
en En
| MEDLINE
| ID: mdl-29939468
ABSTRACT
A cavitand host has been shown to switch from a dimeric assembly to a tetrameric assembly in the presence of cations. Induced by pseudo-specific cation binding attenuating the net negative charge of each host, switching was shown to be highly cation selective. Thus, the concentration of cation required to induce assembly switching ranged from 2â
mM in the case of N(n-Bu)4+ to â¼80â
mM in the case of Na+ . Overall cation affinity was found to be essentially the reverse of Collins' law of matching water affinities, which predicts Na+ to have the strongest affinity for carboxylate groups. Combined with previous data, these results highlight the point that cation affinity for carboxylates are in large part dictated by context.
Palabras clave
Texto completo:
1
Colección:
01-internacional
Banco de datos:
MEDLINE
Asunto principal:
Hidrocarburos Aromáticos con Puentes
/
Cationes
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Compuestos Macrocíclicos
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Sustancias Macromoleculares
/
Metales Alcalinos
Idioma:
En
Revista:
Chemphyschem
Asunto de la revista:
BIOFISICA
/
QUIMICA
Año:
2018
Tipo del documento:
Article