Controlling Lewis basicity in polythioarsenate fluxes:: Stabilization of KSnAsS5 and K2SnAs2S6.: Extended chains and slabs based on pyramidal β-[AsS4]3- and [AsS3]3- units
Controlling Lewis basicity in polythioarsenate fluxes:: Stabilization of KSnAsS5 and K2SnAs2S6.: Extended chains and slabs based on pyramidal β-[AsS4]3- and [AsS3]3- units
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DOI：
10.1021/ic025523h
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发表时间：
2002-07-15
影响因子：
4.6
通讯作者：
Kanatzidis, MG
中科院分区：
文献类型：
--
作者：
Iyer, RG;Kanatzidis, MG
用液态多硫胂酸盐制备了两种低维化合物KSnAsS5和K2SnAsS6，其结果与用硫磷通量得到的结果不同。KSnAsS5在正交空间群Pbam中结晶，晶胞参数为a = 8.136(2)埃，b = 13.784(4)埃，c = 7.428(2)埃。KSnAsS5具有不寻常的锥体物种[AsS2(S-2)]（3-）。K2SnAs2S6在bar上的三角形空间群P(3)中结晶，胞元参数a = 6.717(5)埃，b = 7.204(8)埃，gamma = 1200。通过控制K2S/As2S3/S通量的刘易斯碱度，得到了这些化合物。报道了化合物的光学、热学和光谱性质。
Two low-dimensional compounds, KSnAsS5 and K2SnAsS6, were prepared using liquid polythioarsenate salts, and the results differ from those obtained with the well studied thiophosphate flux. KSnAsS5 crystallizes in the orthorhombic space group Pbam with cell parameters of a = 8.136(2) Angstrom, b = 13.784(4) Angstrom, c = 7.428(2) Angstrom. KSnAsS5 features the unusual pyramidal species [AsS2(S-2)](3-). K2SnAs2S6 crystallizes in the trigonal space group P (3) over bar with cell parameters a = 6.717(5) Angstrom, b = 7.204(8) Angstrom, gamma = 1200. The compounds were obtained by controlling the Lewis basicity of the K2S/As2S3/S flux. The optical, thermal, and spectroscopic properties of the compounds are reported.