Título
1,4-Cyclohexanedicarboxylato-bridged cobalt coordination polymers: Synthesis, crystal structures and magnetic properties
Autor
Luis David Rosales Vázquez
Víctor Sánchez Mendieta
Ivan Garcia Orozco
SUSANA HERNANDEZ LOPEZ
Diego Martínez Otero
RAUL ALBERTO MORALES LUCKIE
Roberto Escudero Derat
FRANCISCO MORALES LEAL
Nivel de Acceso
Acceso Abierto
Materias
Resumen o descripción
1,4-Cyclohexanedicarboxylato-bridged cobalt coordination polymers:
Synthesis, crystal structures and magnetic properties
Three coordination polymers have been synthesized, using self-assembly solution reactions at ambient
conditions, combining Co(II) ion with 1,4-ciclohexanedicarboxylic acid, in the presence of 1,10-phenantrolione
and two different 2,20-bipyridines, as co-ligands: [Co(H2O)(cdc)(phen)]n (1); {[Co(H2O)(cdc)(4dmb)]
2H2O}n (2); {[Co(H2O)(cdc)(5dmb)] 3H2O}n (3), where cdc = e,a-cis-1,4-ciclohexanedicarboxylato,
phen = 1,10-phenantroline, 4dmb = 4,40-dimethyl-2,20-bipyridine, and 5dmb = 5,50-dimethyl-2,20-bipyridine.
Crystallographic studies show that these compounds have one-dimensional (1D) structures; Co(II)
in 1–3 is six-coordinated with a distorted-octahedral coordination sphere. Complexes 2 and 3 exhibit a
novel bridging motif of the cdc ligand in its equatorial, axial cis configuration. In addition, the solid-state
self-assembly of the polymeric structure of 1 gives rise to a 2D supramolecular framework, mainly through
hydrogen bonding. In contrast, complex 2 forms an infinite 1D supramolecular array, made of double Co
ion rows bridged by hydrogen bonding interactions. Complex 3 generates an intricate 2D supramolecular
framework also throughout hydrogen bonding. The thermal stabilities of the three coordination polymers
were investigated. Magnetic properties measurements reveal that complexes 1–3 exhibit weak antiferromagnetic
ordering with h(C-W) = 9.6, 5.8 and 7.5 K, and E2 = 0.51, 0.16 and 0.28 cm 1, accordingly to
Curie-Weiss model and Rueff phenomenological approach, respectively.
Editor
Elsevier
Fecha de publicación
18 de enero de 2018
Tipo de publicación
Capítulo de libro
Recurso de información
Fuente
0020-1693
Idioma
Inglés
Audiencia
Estudiantes
Investigadores
Repositorio Orígen
REPOSITORIO INSTITUCIONAL DE LA UAEM
Descargas
445