MOFs by solvent free high temperature synthesis exemplified by 3∞[Eu3(Tz*)6(Tz*H)2]

Solvent free synthesis methods of solid state chemistry can be utilized to synthesize MOFs (metal organic frameworks) and moreover render frameworks accessible that cannot be obtained from classic solvent reactions. Focusing on nitrogen coordinated rare earth compounds amides and nitriles can be successfully obtained from melts of the referring neutral N donor ligands. Exclusion of solvents prevents solvent co-coordination so that Ln-N-MOFs free of oxygen coordination become available. The success of this synthesis strategy is represented by the synthesis of (3)(infinity)[Eu-3(Tz*)(6)(Tz*H)(2)], Tz*H = 1H-1,2,3-triazole, C2N3H3, Tz*(-) = 1,2,3-triazolate anion, the first 4f network of the aromatic N-heterocycle 1,2,3-triazole. The compound contains divalent europium and adopts a unique (12,4)-net. (C) 2007 Elsevier Masson SAS. All rights reserved.