摘要
By aminothermal treatment of ternary CsxHgySez phases,or of Cs_(2)Se with HgSO4,respectively,in 1,2-diaminoethane(en)and en/water mixtures at 150℃,four new cesium selenido mercurate compounds Cs_(2)[HgSe_(2)](1),[Cs_(2)(H_(2)O)_(2)][HgSe_(2)](2),Cs[Cs_(3)(H_(2)O)0.5][HgSe_(2)](Se_(2))(3)and Cs_(19)(Hen)(H_(2)en)(Se_(2))[HgSe_(2)]_(2)[HgSe3][Hg_(2)Se_(5)]_(2)(4)were synthesized.The precursor phases were prepared by fusion of Cs_(2)Se and HgSe at 600℃.2 comprises an unprecedented 1D anionic selenido mercurate substructure.3 and 4 are rare examples of mercurate compounds with different anions,one of which comprises a new type of a dinuclear chalcogenido mercurate anion.The structures of all four compounds were identified by single crystal X-ray diffraction.Micro X-ray fluorescence spectroscopy(μ-XFS)was used to confirm the heavy atom compositions,and optical absorption measurements were performed to determine the optical band gaps.
基金
supported by the Deutsche Forschungsgemeinschaft(DFG)within the framework of SPP1708.
