One of the classes of molecules that can exhibit single molecule magnet (SMM) behavior is metallacrowns (MCs). Previously, our group has determined that switching the bridging carboxylate ligands in the DyNa(X)4[12-MCMnIII(N)shi-4] class of molecules (X is the identity of the bridging carboxylate anion) can affect the SMM behavior of the metallacrown. The reason for this diversity in SMM behavior is that the chosen carboxylates feature a wide range of pKa values, in which a lower pKa value correlates to more electron withdrawing ability of the ligand. Now, we are replacing acetate(-OAc) with various carboxylate ligands in a Mn(OAc)2[12-MCMnIII(N)shi-4] molecule, hoping to alter the magnetic properties of the molecule and then better understand its SMM behavior. To keep variables minimal, all the syntheses will contain manganese as the central metal ion and will use salicylhydroxamic acid as the metallacrown framework ligand.

Synthesis and single-molecule magnet properties of metallacrowns with various bridging carboxylate ligands

255th National Meeting (2018)

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