A new hydrazine-bridged thioantimonate Mn2Sb4S8(N2H4)2: Synthesis, structure, optical and magnetic properties

A new thioantimonate [Mn2Sb4S8(N2H4)2] (1) was solvothermally synthesized by reacting Mn and Sb2S3 with S in hydrazine monohydrate solution. The single crystal structure analysis revealed that all Mn sites adopt distorted octahedral shapes and all Sb sites have either four-fold coordinated SbS4 configurations or square pyramidal SbS5 geometry. These polyhedra units are interconnected into two-dimensional layers via the sharing S atoms. These layers are further bridged into a novel three-dimensional framework by intra- and inter-layer hydrazine ligands. The compound 1 is a semiconductor with a band gap of 1.59 eV and displays paramagnetic behavior at high temperature and switches to antiferromagnetic ordering at 40 K.

Graphical AbstractA new chalcogenide [Mn2Sb4S8(N2H4)2] (1) was synthesized by the hydrazine-hydrothermal method. Single-crystal X-ray diffraction analysis reveals that compound 1 features a novel three-dimensional network, in which two-dimensional chalcogenide layers are bridged by intra- and inter-layer hydrazine ligands. Optical study shows that compound 1 has a bandgap of about 1.59 eV. Magnetic measurements indicate that compound 1 displays paramagnetic behavior at high temperature and switches to antiferromagnetic ordering at 40 K.Figure optionsDownload full-size imageDownload as PowerPoint slideResearch Highlights► Hydrazine-hydrothermal method to grow crystalline chalcogenides. ► Hydrizane-bridged three-dimensional framework Mn2Sb4S8(N2H4)2. ► The material has a bandgap at ~ 1.59 eV. ► The chalcogenide displays paramagnetic behavior at high temperature (from 40 to 300 K) and antiferromagnetic properties below 40 K.