Ion-exchange resin as a new tool for characterisation of coordination compounds and MOFs by NMR spectroscopy

Abstract

¹H and ¹³C NMR spectroscopy is used to investigate the organic constituents of metal complexes, MOFs and coordination compounds synthesised under solvothermal and precipitation conditions. The elucidation of the ligands in paramagnetic compounds bearing Cu²⁺ (d⁹), Gd³⁺ (f⁷), Eu³⁺ (f⁶), Fe³⁺ (d⁵), ions after treatment with a cationic exchange resin is possible. We prove the efficiency of two post-synthesis linker modifications on diamagnetic IRMOF-3 Zn²⁺ (d¹⁰) with ethyl isocyanate and benzyl bromide.