Synthesis, X-ray structure and luminescent properties of Sm3+ ternary complex with novel heterocyclic β-diketone and 1,10-phenanthroline (Phen)

A new neutral ternary samarium complex Sm(Phen) HL3 in which Phen is 1,10-phenanthroline and HL is (1,3-bis(1,3-dimethyl-1H-pyrazol-4-yl)-1,3-propanedione) was synthesized. Molecular structure of this complex was determined by X-ray diffraction. Under UV-light this complex is demonstrated bright red luminescence (lambda(max)=647 nm), which was corresponding to the electric dipole (4)G(5/2)-> H-6(9/ 2) transition in Sm3+ ion. UV-absorption, excitation and emission spectra of the title compound were investigated.