“…4,4′-Bipyridine is a type of ligand that is often used in the synthesis to obtain coordination polymers. Such complexes exhibit very unique properties like photoluminescence or photochromism [ 25 , 26 , 27 , 28 ], biological [ 29 , 30 ] and magnetic properties [ 26 , 31 ], or the ability to detect or absorb harmful substances [ 32 , 33 , 34 , 35 ]. In this paper, we present synthesis, thermal properties, and crystal structures of two 4,4′-bipyridine coordination polymers with lanthanum (III) and samarium (III) dibromoacetates.…”