Two new lanthanide-nitronyl nitroxide complexes: Magnetic and fluorescence properties

In complexes 1 and 2, isolated mononuclear molecules connect each other through intermolecular hydrogen bonds to form 3D supermolecular framework. Quantitative estimate of the magnetic interaction parameters between paramagnetic species in complexes 1 and 2. The result indicates that there are weak antiferromagnetic interaction between metal ions and nitronyl nitroxide radicals. The study of luminescence properties show that complex 1 may potentially detect Cr2O72− anions sensitively and as a luminescence-based sensor for quantitative analysis, due to the lower detection limit (1 × 10−7 M) and almost linear at low concentrations.