Complexations of Mn(II) with SbS4 and SbS3 ligands: Hydrazine-solvothermal syntheses, crystal structures and photocatalytic properties of manganese thioantimonates

Publication date: Available online 10 October 2018Source: Journal of Solid State ChemistryAuthor(s): Shufen Li, Jingyu Han, Limei Zhang, Wenqing Jiang, Dingxian JiaAbstractNew Mn(II)-thioantimonate compounds [Mn(NH3)6]2[{Mn(NH3)3}2(μ3-SbS4)2]Cl2 (1), [Mn(NH3)6][{Mn(NH3)4}2(μ-SbS4)2]·2H2O (2), [Mn(NH3)6][{Mn2(μ-SbS4)2}(μ-N2H4)2] (3), and [{Mn(N2H4)}2{Mn(μ-SbS3)2(μ-N2H4)2}(μ-N2H4)2]n (4) were prepared in different hydrazine solution under solvothermal conditions. In 1, the tetrahedral SbS4 unit acts as a tridentate bridging ligand to connect the [Mn(NH3)3]2+ units into a 2-D lamellar anion [Mn(NH3)3(μ3-SbS4)2−]n containing 12-membered Mn3Sb3S6 heterorings. Two SbS4 ligands join two [Mn(NH3)4]2+ units with monodentate μ−1κ1S1: 2κ1S1 bridging mode, forming a binuclear [{Mn(NH3)4}2(μ-SbS4)2]2− anion in 2. In 3, the SbS4 ligand links [Mn2(μ-N2H4)2] units with tridentate bridging mode, to form a 1-D [{Mn2(μ-SbS4)2}(μ-N2H4)22−]n chain-like anion. Octahedral [Mn(NH3)6]2+ complex cation acts as the counter ion in compounds 1−3. In 4, the Mn(N2H4) units are interconnected into a neutral infinite [{Mn(N2H4)}2{Mn(μ-SbS3)2(μ-N2H4)2}(μ-N2H4)2]n chain by μ-SbS3 and μ-N2H4 bridging ligands. The trigonal pyramidal SbS3 unit adopts a tridentate bridging coordination mode μ−1κ2S1, S2:2κ2S1, S3. Compounds 1−4 exhibit tunable semiconducting band gaps varying in the range of 2.38−2.55 eV. Compounds 1 and 2 display higher photocatalytic activity in the de...

Source: Journal of Solid State Chemistry - October 10, 2018 Category: Chemistry Source Type: research