Zeolitic imidazolate framework materials, their synthesis and use
A novel zeolitic imidazolate framework material comprises a partially saturated benzimidazole or a partially saturated substituted benzimidazole as a linking ligand, optionally together with unsaturated benzimidazole or an unsaturated substituted benzimidazole as a further linking ligand.
1. A zeolitic imidazolate framework material comprising zinc and 4,5,6,7-tetrahydrobenzimidazole.
2. The framework material of claim 1 , further comprising benzimidazole or 5-azabenzimidazole.
3. The framework material of claim 2 , further comprising from 0 mol % to 99 mol % of benzimidazole or 5-azabenzimidazole, based on the total amount of benzimidazole or 5-azabenzimidazole and 4,5,6,7-tetrahydrobenzimidazole or 4,5,6,7-tetrahydro-3H-imidazo[4,5-c]pyridine in the material.
4. The framework material of claim 1 , further comprising an unsaturated benzimidazole or an unsaturated substituted benzimidazole as a linking ligand.
5. The framework material of claim 1 , further comprising one or more divalent transition metal ions.
6. The framework material of claim 1 , further comprising one or more zinc ions or one or more cobalt ions.
7. The framework material of claim 1 , further comprising a 1:1 mixture of lithium and boron ions.
8. The framework material of claim 1 , wherein said framework material exhibits the SOD framework type.
9. The framework material of claim 1 , wherein said framework material exhibits the RHO framework type.
10. A zeolitic imidazolate framework material comprising zinc and 4,5,6,7-tetrahydro-3H-imidazo[4,5-c]pyridine.
11. The framework material of claim 10 , further comprising benzimidazole or 5-azabenzimidazole.
12. The framework material of claim 11 , further comprising from 0 mol % to 99 mol % of benzimidazole or 5-azabenzimidazole, based on the total amount of benzimidazole or 5-azabenzimidazole and 4,5,6,7-tetrahydrobenzimidazole or 4,5,6,7-tetrahydro-3H-imidazo[4,5-c]pyridine in the material.
13. A method of making a zeolitic imidazolate framework material comprising the step of reacting a mixture of a source of a partially saturated benzimidazole or a source of a partially saturated substituted benzimidazole with a source of zinc in the presence of a solvent at a temperature sufficient to form the zeolitic imidazolate framework material.
14. The method of claim 13 in which the temperature is at least 20° C.
15. The method of claim 13 in which the partially saturated benzimidazole comprises 4,5,6,7-tetrahydrobenzimidazole.
16. The method of claim 13 in which the partially saturated substituted benzimidazole comprises 4,5,6,7-tetrahydro-3H-imidazo[4,5-c]pyridine.
17. The method of claim 13 , wherein the source of zinc comprises zinc acetate.
18. The method of claim 13 , wherein the mixture further comprises an unsaturated benzimidazole or an unsaturated substituted benzimidazole.