Synthesis and luminescent properties of 3-(2-benzoxazol-2-yl)- and 3-(2-benzothiazol-2-yl)-2-naphtholates of some non-transition and rare earth metals

Abstract Complexes M(NpOON) n and M(NpSON) n (NpOON = 3-(2-benzoxazol-2-yl)-2-naphtholate, NpSON = 3-(2-benzothiazol-2-yl)-2-naphtholate, M = Li, Sc, Sm, Eu, Gd, Tb, Dy) were prepared by the reactions of silylamides M[N(SiMe 3 ) 2 ] n ( n  = 1, 3) with corresponding O,N-chelating ligand. For the synthesis of zinc complexes Zn(NpOON) 2 and Zn(NpSON) 2 diethylzinc was used. Li, Zn and Sc naphtholates exhibited strong green electroluminescence. The OLED device based on Sc(NpOON) 3 showed luminance 8780 cd/m 2 (12 V) – the highest value among the devices prepared with organoscandium luminophores.