Synthesis and Photoluminescence of the Heteroligand Sm(III) Complexes Containing Nitrogen Heterocycles (Phen, 2,2'-Bipy) and Anions C4H8NCS_1~-, iso-Bu2PS2, (iso-PrO)2PS_2~-, and NO_3~-. Crystal Structure of Sm(2,2,-Bipy)2(NO3)3

摘要

The photoluminescence spectra of the known complexes, Sm(L)2(NO3)3 (I, II), Sm(L)(iso-Bu2PS2)3 (III, IV), Sm(L)(iso-Bu2PS2)2(NO3) (V, VI) (L = Phen, 2,2'-Bipy), and Sm(Phen)(C4H8NCS2)3 (VIII), and new compounds, Sm(Phen)((iso-PrO)2PS2)3 (VII) , Sm(2,2'-Bipy)(C4H8NCS2)3 · 0.5CH2Cl2 (IX), are obtained and interpreted. Using the X-ray structure analysis data, the crystal structure of the [Sm(2,2'-Bipy)2(NO3)3] complex (II) is determined. Structure II consists of discrete mononuclear molecules having a ten-vertex coordination polyhedron N4O6. The ligands 2,2'-Bipy and NO3 are bidentate-cyclic. The influence of the composition of the complexes on the photoluminescence (PL) intensity in the series I—VI is considered. The dependence of the intensity of the band with λ_(max) = 647 nm in the PL spectra of complexes III, VII, and VIII on the type of the sulfur-containing ligand in their composition is established. The band intensity changes in the series VIII > III > VII.