Effect of combining 1-naphthoate and pentafluorobenzoate anions in Eu( <scp>iii</scp> ) compounds on their structure and photoluminescent properties

] (8), it was shown that mixed-anionic compounds can be obtained by combining the more flexible 1-naphthaleneacetate (1-NAA) and pfb anions. In compounds 3 and 6, some anion positions are disordered because both 1-nap and pfb anions occupy the same positions in varying ratios. The examples demonstrate that careful optimization of non-covalent interactions enables precise control over the structure and physicochemical properties of these coordination compounds, resulting in improved luminescent performance. The obtained compounds were characterized by single-crystal and powder X-ray diffraction, luminescence spectroscopy, infrared (IR) spectroscopy, and elemental (CHN) analysis. The photoluminescent properties were studied for the solid-state samples. Additionally, the density functional theory (DFT) method was employed to model the frontier molecular orbitals of the complexes and analyze their electronic structures.