First tetrazole-bridged d-f heterometallic MOFs with a large magnetic entropy change

A novel 3D tetrazole-bridged 3d-4f heterometallic MOF {(H3O)(3)[Gd-3-Mn-2(Trz)(4)]center dot 12H(2)O}(n) (1) with a hexanuclear [Gd-6] cluster was obtained via in situ [2+3] cycloaddition reaction and structurally characterized, possessing good solvent and thermal stabilities, as well as a large magnetic entropy change -Delta S-m = 40.3 J kg(-1) K-1 for Delta H = 7 T at 2.0 K. To our knowledge, it is the first example of tetrazole-bridged 3d-4f heterometallic MOFs.