Two new layered bimetallic sulfides: Solvothermal synthesis, crystal structure, optical and magnetic properties

✍ Scribed by Zhien Lin; Xianhui Bu; Pingyun Feng

• Publisher: Elsevier Science
• Year: 2010
• Tongue: English
• Weight: 1019 KB
• Volume: 132
• Category: Article
• ISSN: 1387-1811
• DOI: 10.1016/j.micromeso.2010.03.010

✦ Synopsis

Two new bimetallic sulfides, (Haep) 2 ÁGa 2 Sb 2 S 7 (1) and Mn 2 (phen)Sb 2 S 5 (2), have been synthesized under solvothermal conditions, where aep = 1-(2-aminoethyl)piperazine and phen = 1,10-phenanthroline. The structure of 1 consists of GaS 4 tetrahedra and SbS 3 trigonal pyramids and has a layered structure with 8-membered-ring windows. Interestingly, the interlayer organic cations form helices through extensive hydrogen bonds. Compound 2 has a neutral layered structure containing infinite Mn-S sheets. The organic species are attached directly to Mn atoms within the layers by covalent bonds and protrude into the interlayer region. Both compounds 1 and 2 exhibit intense photoluminescence upon photoexcitation at 360 nm. Magnetic susceptibility measurements demonstrate the existence of antiferromagnetic interactions in compound 2. Crystal data: 1, orthorhombic, P2 1 2 1 2 1 (No. 19), a = 9.9274( 2) Å, b = 12.9201(3) Å, c = 21.2254(4) Å, V = 2722.43(10) Å 3 , Z = 4; 2, monoclinic, P2 1 /c (No. 14), a = 12.6385(3) Å, b = 12.3998 (3) Å, c = 12.3670(3) Å, b = 111.8240(10)°, V = 1799.19(7) Å 3 , Z = 4.