Syntheses, structures, and phosphorescence of complexes (A)[Gd(L)4] and [Gd(Phen)(L)3] (L = iso-Bu2PS2-, C4H8NCS2-; A = NH4+, Et4N+)

Abstract

Complexes (A)[Gd(L)₄] and [Gd(Phen)(L)₃] (L = iso-Bu₂PS₂^-, C₄H₈NCS₂^-; A = NH₄⁺, Et₄N⁺) are synthesized. The crystal structure of compound [Gd(Phen)(iso-Bu₂PS₂)₃] · MeCN is determined by X-ray diffraction analysis (CIF file CCDC no. 1455418). The structure consists of molecules of the mononuclear complex [Gd(Phen)(iso-Bu₂PS₂)₃] and MeCN. The coordination polyhedron N₂S₆ of the Gd atom is a distorted antiprism. The complexes exhibit phosphorescence in a range of 400–600 nm. The energies of the triplet levels of the ligands C₄H₈NCS₂^-(23336 cm^–1) and iso-Bu₂PS₂^-(23506 cm^–1) are determined from the phosphorescence spectra of complexes (A)[Gd(L)₄] in frozen ethanol (77 K).