Synthesis, characterization and thermogravimetric study of Dy and Sm 12-crown-4 bipy, terpy and phen complexes

The synthesis, characterization and thermogravimetric study of [Sm(12C4)(H2O)4]Cl3, [Dy(12C4)(H2O)4]Cl3, [Sm(12C4)(bipy)(H2O)2]Cl3, [Dy(12C4)(bipy)(H2O)2]Cl3, [Sm(12C4)(bipy)(phen)]Cl3, [Dy(12C4)(bipy)(phen)]Cl3, [Sm(12C4)(phen)2]Cl3, [Dy(12C4)(phen)2]Cl3, [Sm(12C4)(terpy)(H2O)]Cl3 and [Dy(12C4)(terpy)(H2O)]Cl3 (12C4 = 12-crown-4; bipy = bipyridine; phen = 1,10-phanathroline; terpy = terpyridine) are reported. All compounds exhibit CN = 8 and four oxygen–lanthanide bonds of the crown ether provide a very stable (from the thermal point of view) chemical environment, since the crown ether molecules are the last organic moiety to be released under heating.