Three new europium(III) methanetriacetate metal-organic frameworks: the influence of synthesis on the product topology.
Three new metal-organic framework structures containing Eu(III) and the little explored methanetriacetate (C7H7O6(3-), mta(3-)) ligand have been synthesized. Gel synthesis yields a two-dimensional framework with the formula [Eu(mta)(H2O)3]n·2nH2O, (I), while two polymorphs of the three-dimensional framework material [Eu(mta)(H2O)]n·nH2O, (II) and (III), are obtained through hydrothermal synthesis at either 423 or 443 K. Compounds (I) and (II) are isomorphous with previously reported Gd(III) compounds, but compound (III) constitutes a new phase. Compound (I) can be described in terms of dinuclear [Eu2(H2O)4](6+) units bonded through mta(3-) ligands to form a two-dimensional framework with topology corresponding to a (6,3)-connected binodal (4(3))(4(6)6(6)8(3))-kgd net, where the dinuclear [Eu2(H2O)4](6+) units are considered as a single node. Compounds (II) and (III) have distinct three-dimensional topologies, namely a (4(12)6(3))(4(9)6(6))-nia net for (II) and a (4(10)6(5))(4(11)6(4))-K2O2; 36641 net for (III). The crystal density of (III) is greater than that of (II), consistent with the increase of temperature, and thereby autogeneous pressure, in the hydrothermal synthesis.
Centro Universitario de la Defensa de Zaragoza, Ctra Huesca s/n, Zaragoza, 50090 Zaragoza, Spain.
Laura
L
Cañadillas-Delgado
Instituto de Ciencia de Materiales de Aragón, CSIC-Universidad de Zaragoza, C/Pedro Cerbuna 12, Zaragoza, 50009 Zaragoza, Spain.
Oscar
O
Fabelo
Laboratorio de Rayos X y Materiales Moleculares, Departamento de Física Fundamental II, Facultad de Física, Universidad de La Laguna, Avda Astrofísico Francisco Sánchez s/n, La Laguna, 38204 Tenerife, Spain.
Jorge
J
Pasán
Laboratorio de Rayos X y Materiales Moleculares, Departamento de Física Fundamental II, Facultad de Física, Universidad de La Laguna, Avda Astrofísico Francisco Sánchez s/n, La Laguna, 38204 Tenerife, Spain.
Mariadel
M
Déniz
Laboratorio de Rayos X y Materiales Moleculares, Departamento de Física Fundamental II, Facultad de Física, Universidad de La Laguna, Avda Astrofísico Francisco Sánchez s/n, La Laguna, 38204 Tenerife, Spain.
Carla
C
Martínez-Benito
Laboratorio de Rayos X y Materiales Moleculares, Departamento de Física Fundamental II, Facultad de Física, Universidad de La Laguna, Avda Astrofísico Francisco Sánchez s/n, La Laguna, 38204 Tenerife, Spain.
Pau
P
Díaz-Gallifa
Instituto de Productos Naturales y agrobiología (CSIC), Instituto Universitario de Bioorgánica `Antonio González', Universidad de La Laguna, Avda Astrofísico Francisco Sánchez s/n, La Laguna, 38204 Tenerife, Spain.
Tomás
T
Martín
Laboratorio de Rayos X y Materiales Moleculares, Departamento de Física Fundamental II, Facultad de Física, Universidad de La Laguna, Avda Astrofísico Francisco Sánchez s/n, La Laguna, 38204 Tenerife, Spain.
Catalina
C
Ruiz-Pérez
D000085:Acetates / Q000737:chemistry; D002614:Chelating Agents / Q000737:chemistry; D056831:Coordination Complexes / Q000737:chemistry*; D018360:Crystallography, X-Ray; D005063:Europium / Q000737:chemistry*; D006860:Hydrogen Bonding; D008958:Models, Molecular; D008968:Molecular Conformation
D000085:Acetates; D002614:Chelating Agents; D056831:Coordination Complexes; D005063:Europium
metal-organic frameworks; polymorphism; topology