Method for stereospecific cycloaddition reaction
AssigneeKing Fahd University of Petroleum and Minerals
InventorsAbdul Malik Peedikakkal, Hasan Ali Al-Mohsin
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Abstract
Metal-organic frameworks (MOFs) may have Zn(II), Pb(II), and/or Cd(II) as a central metal ion, a 4,4′-bipyridylethylene (bpe) ligand as a first ligand; and fumaric acid (fum) and/or oxalic acid (ox) as a second ligand, wherein the 4,4′-bipyridylethylene ligands are stacked in the MOF, and wherein a distance between two consecutive 4,4′-bipyridylethylene ligands is less than 5 Å. Cycloadditions, particularly photoinduced [2+2] cycloadditions may be catalyzed by such MOFs, and/or the conversion of photoinduced [2+2] cycloadditions in inventive MOFs may be increased by mechanical force, such as by grinding.
Claims12
A method of increasing the conversion of a [2+2] cycloaddition, the method comprising:
- grinding a metal organic framework (MOF) to obtain a ground MOF, the MOF optionally being a hydrate and/or nitrate;
- and
- irradiating an olefinic substrate in the presence of the ground MOF with UV light,
- wherein the MOF has repeating structural units, each structural unit comprising:
- Zn(II), Pb(II), and/or Cd(II) as a metal ion;
- a 4,4′-bipyridylethylene(bpe) ligand as a first ligand;
- and
- fumaric acid (fum) and/or oxalic acid (ox) as a second ligand,
- wherein the 4,4′-bipyridylethylene ligands are stacked in the MOF, and
- wherein a distance between two consecutive 4,4′-bipyridylethylene ligands is less than 5 Angstroms, and
- wherein the first ligand is protonated.
Dependencies are inferred from the claim text.