Crystalline metal organic framework

A crystalline metal organic framework which comprises repeating units of formula (IA), or alternatively a crystalline metal organic framework which comprises repeating units of formula (IB), comprising a metal M2+ and two ligands L1−

• wherein:
• the two ligands L1− can be the same or different,
• M2+ is a divalent metal cation,
• each L1− is an anion independently selected from the group consisting of (R)-(imidazole-5-ylmethyl)-(1,2,4-triazol-4-yl)acetate of formula (R)-(II) and (S)-(imidazole-5-ylmethyl)-(1,2,4-triazol-4-yl)acetate of formula (S)-(II);
• in the repeating unit of formula (IB), the metal M is coordinated to two solvent molecules S, both S are equal and are a solvent molecule selected from the group consisting of water, methanol, ethanol, isopropanol, tert-butanol, diethyl ether, 1,4-dioxane tetrahydrofuran, N,N-dimethylformamide, acetonitrile, acetone, 1,2-ethyleneglycol, dimethylsulfoxide and pyridine,
• → represents a coordination bond between the metal M2+ and a nitrogen atom of each ligand L1−, wherein one of the coordination bonds is between the metal M2+ and the nitrogen atom N1 of one L1−, and the other coordination bond is between the metal M2+ and the nitrogen atom N2 of the other L1−, and between the metal M2+ and the solvent molecules S;
• thereby the repeating unit has the formula (RR)-(IA), or alternatively, the formula (SS)-(IA)
• or alternatively, the formula (RS)-(IA), or alternatively, the formula (SR)-(IA)
• or alternatively, the formula (RR)-(IB), or alternatively, the formula (SS)-(IB)
• or alternatively, the formula (RS)-(IB), or alternatively, the formula (SR)-(IB)
• wherein each repeating unit in the metal organic framework is connected to other repeating units in such a way that the metal M2+ of one repeating unit is connected to two additional repeating units of formula (IA), or alternatively of formula (IB), through coordination bonds represented by
• between the metal M2+ of the first repeating unit and the nitrogen atoms of the ligands L1− of the additional repeating units, wherein one of the additional coordination bonds is between the metal M2+ of the first repeating unit and the nitrogen atom N1 of an L1− of an additional repeating unit;
• and the other additional coordination bond is between the metal M2+ of the first repeating unit and the nitrogen atom N2 of an L1− of another additional repeating unit.