Synthesis and Crystal Structure of Three New Metal-Organic Frameworks in the Ln(III)/2,6-Pyridinedicarboxylate System

In this paper, three new metal-organic frameworks, synthesized by hydrothermal technique, are described. The compounds crystallize in triclinic space group P - 1 with cell parameters, respectively equal to (1) [La(H2O)(3)(dipic)](2)(C2O4) center dot 2H(2)O a = 7.9990(1) angstrom, b = 8.3380(4) angstrom, c = 9.6180(5) angstrom, alpha = 98.194(5)degrees, beta = 100.438(3)degrees, gamma = 102.437(3)degrees, (2) [Eu(H2O)(2)(C2O4)](2)(dipic) center dot 3H(2)O a = 8.2170(6) angstrom, b = 10.5900(8) angstrom, c = 13.0670(3) angstrom, alpha = 93.951(3)degrees, beta = 103.393(5)degrees, gamma = 107.797(6)degrees, and (3) [Ce-3(dipic)(3)(Hdipic)(SO4)(H2O)(3)] center dot 4H(2)O a = 11.655(1) angstrom, b = 12.886(1) angstrom, c = 16.139(2) angstrom, alpha = 106.369(8)degrees, beta = 92.90(1)degrees, gamma = 115.787(7)degrees. They differ by their dimensionality mono-dimensional for (1), tri-dimensional for (2) and bi-dimensional for (3).