(DEA-H)_7~+In_(11)S_(21)H_2: a new layered open framework indium sulfide based on the interconnection of [In_(10)S_(20)]~(10-) supertertrahedra

摘要

The reaction of In, S and diethylamine at 130 ℃ yields white hexagonal plates of the new porous indium sulfide (DEA-H)_7~+In_(11)S_(21)H_2. It crystallizes in the hexagonal space group P-62c (No. 190) with a = 14.6712(5) A, b = 14.6712(5) A, c = 42.667(2) A, V = 7952.62(5) A~3 and Z = 4. The InS_4 tetrahedra are interconnected in a hierarchical way to form [In_(10)S_(20)]~(10-) supertetrahedra. These units are interconnected by InS_4 tetrahedra into layers within the (001) plane. The layers contain large pores with dimensions of about 15 * 15 A. Two neighboured layers form a double-layer with the vertices of the [In_(10)S_(20)]~(10-) supertetrahedra each pointing towards the pores of the layers. The double-layers are stacked perpendicular to the c-axis with an interlayer distance of about 6.5 A. The [(C_2H_5)_2NH_2]~+ cations are located in the pores of the layers and within the slabs between successive double-layers. The compound is decomposed to In_2S_3 in a two step reaction.