Artículos de revistas
Liquid-crystalline coordination polymers based on tetra(alkoxybenzoato)dirhodium(II) complexes axially linked by tetrazine, phenazine and 4,4′-bipyridine
Fecha
2017-11Registro en:
Rossi, Leonardo; Huck Iriart, Cristián; Castro, Maria Ana; Cukiernik, Fabio Daniel; Liquid-crystalline coordination polymers based on tetra(alkoxybenzoato)dirhodium(II) complexes axially linked by tetrazine, phenazine and 4,4′-bipyridine; Taylor & Francis Ltd; Journal of Coordination Chemistry; 70; 21; 11-2017; 3633-3649
0095-8972
1029-0389
CONICET Digital
CONICET
Autor
Rossi, Leonardo
Huck Iriart, Cristián
Castro, Maria Ana
Cukiernik, Fabio Daniel
Resumen
The reaction of dirhodium tetrakis(3,4,5-trialkoxy)benzoates Rh2(B3OCn)4 (n = 10, 14, and 18) with three different dinitrogenated axial ligands (Lax), namely tetrazine (tz), phenazine (phz), and 4,4′-bipyridine (bpy), gave rise to three homologous series of mesogenic coordination polymers, [Rh2(B3OCn)4]Lax. All of them exhibited thermotropic columnar mesophases that were of the hexagonal type for tz and phz and rectangular for bpy. The lighter n = 10 homologs of the three series are liquid crystals (LC) at room temperature. Their mesomorphic properties have been compared with those of the previously studied Lax = pyrazine series. Models for the supramolecular organization of the three polymeric series in their Col LC phases are proposed on the basis of their structural parameters, as measured by XRD and SAXS. The differences are interpreted in terms of different coordination features of the axial ligands.