Ultrasound-assisted reversible crystal-to-crystal ligand exchange reaction of coordination supramolecular of Lanthanum(III): Precursors for La2O3 Nanostructure

Irreversible crystal-to-crystal transformations of coordination supramolecular of Lanthanum(III) with the ligands 1,4-bis(3-pyridyl)-2,3-diaza-1,3-butadiene (3-bpdb) from [La(3-bpdb)0.5(H2O)4(NO3)3]2.H2O.3-bpdb (1) to [La(4,4′-bipy)(H2O)2(NO3)4]·(4,4′-Hbipy) (2) by ligand-replacement processes under ultrasound irradiation, have been studied. These irreversible solid-state structural transformations of compound 1 to compounds 2, have been verified by XRPD measurements, FT-IR and scanning electron microscopy (SEM). Nano-sized La2O3 was obtained by thermal decomposition of compounds 1 and 2 at 650 °C under air atmosphere, respectively.

کلیدواژه ها:

Nanostructure ، lanthanum (III) ، Crystal-to-crystal ، Nano Oxide