Mixed Yttrium and Dysprosium Lactates as the First Example of Rare-Earth Hydrogen-Bonded Organic Framework Solid Solutions

Molecular solid solutions of yttrium and dysprosium lactates of composition [Y_1–xDy_x(C₃H₅O₃)₃(H₂O)₂], where x = 0, 0.01, 0.1, 0.5, 0.8, and 1, have been obtained for the first time. These solutions can be considered as the first examples of REE coordination compounds formed due to hydrogen bonding. The obtained compounds have been analyzed by the set of physicochemical methods including XRD, energy dispersive X-ray (EDX), IR, and Raman spectroscopy. Unit cell volume of solid solutions shows linear dependence on cationic composition. It has been found that variation in the cationic composition of solid solutions leads to the monotonic shift of position of lines in Raman spectra corresponding to vibrations of Ln–O bonds (151–158 cm^–1). It has been shown that the obtained compounds can behave as single-molecule magnets with magnetization barrier up to 108 K.