Syntheses, Crystal Structures, and Optical and Photocatalytic Properties of Four Small-Amine-Molecule-Directed M–Sn–Q (M = Zn, Ag; Q = S, Se) Compounds

Abstract

By utilizing different small amine molecules as structure-affecting agents (SAAs) and charge-balancing agents (CBAs), four new M–Sn–Q (M = Zn, Ag; Q = S, Se) compounds with the anionic architectures ranging from a one-dimensional (1D) chain to a three-dimensional (3D) network have been solvothermally synthesized. Compound [(Me)2NH2]2­ZnSn3Se8 (1) features an anionic (4,4) layer of [ZnSn3Se8] n 2n– and represents a rare [ZnSn3Se10] T2 cluster-based two-dimensional Zn–Sn–Se compound directed by organic amine. Compound [NH4]3AgSn3Se8 (2) contains infinite linear anionic chains of [AgSn3Se8] n 3n–. Compound [CH3NH3]2­[H3O]­Ag5Sn4Se12­·C2H5OH (3) exhibits a 3D open-framework structure of [Ag5Sn4Se12] n 3n– with intersecting 3D channels. Compound [CH3NH3]6­Ag12Sn6S21 (4) features a 3D framework structure with 1D channels filled by [CH3NH3]+ cations. The most fascinating structural feature of compound 4 is that a complex 3D [Ag12S17] n 22n– anionic network exists based on the combination of three types of basic building blocks of [AgS2] dumbbells, [AgS3] triangles, and [AgS4] tetrahedra. The thermal stabilities, optical properties of the title compounds 1–4, as well as the theoretical band structure and density of states of compound 4 have been studied. Moreover, compound 3 displayed visible-light-driven photocatalytic activity for the degradation of crystal violet.

Fast Room Temperature Synthesis of the Thiostannate [Ni(2amp)3]2[Sn2S6]·9.5H2O: Crystal Structure and Properties

“…In the Raman spectrum the typical Sn–S modes of the thiostannate anion occur between 400 and 100 cm –1 (Figure S4, Supporting Information) The assignment of the modes base on literature data for the [Sn 2 S 6 ] 4– anion in Na 4 Sn 2 S 6 · 14H 2 O (Table S4, Supporting Information) showing the signal of the Sn–S term stretching modes at 391 and 377 cm –1 . These resonances are shifted to 381 and 372 cm –1 .…”

Structural Expansion of Chalcogenido Tetrelates in Ionic Liquids by Incorporation of Sulfido Antimonate Units

“…[42] The fact that the GeÀSb onds apparently are not influenced by neighboring [Ge 2 Sb 2 S 7 ] 2À cluster anions points at the absence of significant secondary interactions. The clustering of seven complex anions in 1 therefore seems to be driven by the nearly spherical shape of these assemblies, which are Scheme1.Overview of the synthesis of (Cat) 16 (2). The cations of compounds 1 and 2a are heavily disorderedi nthe crystal structures and could therefore not be determined by meanso fsingle-crystalX -ray diffraction, yet most probably,'Cat'r epresentst ris-alkylated imidazolium cations (C 4 C 1 C 1 Im) + ,a ccordingt os inglecrystal Raman spectroscopy(see below).…”

“…Metal chalcogenide compounds possess av ariety of desirable properties, mostly based on their intrinsic semiconducting, photo-conducting or ion conducting properties. [1][2][3][4][5][6][7][8][9] However, beside the native features of corresponding binary M x E y compounds( M= d-block or p-block (semi)metal, E = O, S, Se, or Te ), the combinationo fd ifferent Mo rd ifferentEatoms, and the formation of chalcogenido( semi)metalates by (formal) incorporation of Cat 2 E( Cat = alkali metal or non-metal cation) can be used to additionally tune the corresponding structurala nd electronic properties. [10][11][12][13][14][15] In order to achieve at argeted synthesis of such compounds, variouss ynthetic methods have been applied.…”

Discrete Supertetrahedral Tn Chalcogenido Clusters Synthesized in Ionic Liquids: Crystal Structures and Photocatalytic Activity

“…Organic pollutants, such as dye contaminants (e. g., methyl orange (MO) and crystal violet (CV)), have proved to be photodegradable with the catalysis of metal chalcogenides. [12,[100][101][102] The discrete T3 clusters T3-1-T3-4 (Figure 9a) were investigated for photodegradation of MO. [46] As shown in Figure 9b, the photodegradation efficiency of the InS cluster (T3-1) was higher than that of S/Se-, Se-, or Se/Tecontaining clusters (T3-2-T3-4) under UV light irradiation.…”