A series of multidimensional MOFs incorporating a new N-heterocyclic building block: 5,5′-Di(pyridin-3-yl)-3,3′-bi(1,2,4-triazole)

Abstract

Using the N-heterocyclic building block 5,5′-di(pyridin-3-yl)-3,3′-bi(1,2,4-triazole) (3,3′-H2dbpt), four 3-D coordination polymers with diverse connectivity, [M(3,3′-dbpt)]n, M=Co (1), M=Ni (2), M=Zn (3), and [Cd2(3,3′-dbpt)Cl2]n (4), were constructed. By changing the central metal ions, 3,3′-H2dbpt had three different coordination modes. Consequently, 1–3, which are isostructural, have a 3-D 4-connected topology with (42.84) Schläfli symbol. 4 has a 3-D (4, 6)-topology, with (43.63)2(46.66.83) Schläfli symbol. Both 1 and 2 reveal weak antiferromagnetic behavior. In addition, 3 and 4 exhibit purple and blue emission bands, respectively. These results indicate that 3,3′-H2dbpt is an excellent multi-connection linker to construct MOFs with interesting structures and properties.