Self-assembly of a family of suprametallomacrocycles: revisiting an o-carborane bisterpyridyl building block.
Dalton Trans
; 43(25): 9604-11, 2014 Jul 07.
Article
em En
| MEDLINE
| ID: mdl-24832526
ABSTRACT
The self-assembly of the o-carborane-based, bisterpyridyl monomer, 1,2-bis[4'-(4-ethynylphenyl)-2,2'6',2''-terpyridine]-o-carborane, utilizing either Zn(II) or Fe(II) in a precise metal ligand ratio (1 1), generated a family of metallomacrocycles that were studied via ESI-TWIM-MS, (1)H NMR, and 2D NMR (COSY, NOESY). Under kinetic control, via formation of Fe(II) complexes, the main cyclic product was triangular, as is typical of 60°-based bisligands. Under thermodynamic control using more labile transition metal complexes, e.g. Zn(II), the ratio of cyclic species was found to be concentration and temperature dependent, and under an adequate entropic driving force, the cyclic dimer was formed. This system was probed via variable temperature NMR to reveal dynamic equilibrium between the entropically favored dimer and enthalpically favored trimer.
Texto completo:
1
Coleções:
01-internacional
Base de dados:
MEDLINE
Assunto principal:
Piridinas
/
Compostos de Boro
/
Compostos Macrocíclicos
/
Complexos de Coordenação
Tipo de estudo:
Prognostic_studies
Idioma:
En
Revista:
Dalton Trans
Assunto da revista:
QUIMICA
Ano de publicação:
2014
Tipo de documento:
Article
País de publicação:
ENGLAND
/
ESCOCIA
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GB
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GREAT BRITAIN
/
INGLATERRA
/
REINO UNIDO
/
SCOTLAND
/
UK
/
UNITED KINGDOM