Abstract
Four new heteroleptic samarium complexes showing reddish orange luminescence of type Sm(TFNB)3L {TFNB = 4,4,4-trifluoro-1-(2-naphthyl)-1,3-butanedione; L = 1,10-phenanthroline (Phen); 3,8-dibromo-1,10-phenanthroline (PBr); 3-bromo-8-(3,4-(ethylenedioxy)thien-2-yl)-1,10-phenanthroline (MP) and 3,8-bis(3,4-(ethylenedioxy)thien-2-yl)-1,10-phenanthroline (DP)} were prepared and investigated. Herein, we sought to enhance the luminescence properties of samarium complexes by using different phenanthroline derivatives. The complexes were characterized by elemental analysis, thermogravimetric and spectroscopic techniques. The hypersensitive peak at 647 nm in emission spectra is responsible for the emission in visible region. The color coordinates of all the Sm(III) complexes depict reddish orange emission. Thermogravimetric data claim the thermal stability of complexes upto a range of temperature. The synthesized complexes having ∼3 eV optical band gap and narrow orange red emission might be useful in display applications.
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