Palchik Oleg, Marking Gregory M, Kanatzidis Mercouri G
Department of Chemistry, Michigan State University, East Lansing, Michigan 48824, USA.
Inorg Chem. 2005 Jun 13;44(12):4151-3. doi: 10.1021/ic050087v.
The influence of the Lewis basicity of alkali polysulfide fluxes (A(2)S(x)) (A = alkali) as a function of x on the respective reactivities of Pb and Sn with Ge was studied and found to be strong. Cs(4)Pb(4)Ge(5)S(16), K(2)PbGe(2)S(6), and K(4)Sn(3)Ge(3)S(14) could be prepared only under low basicity with S/A(2)S ratios of > or =11. These compounds display complex frameworks and are semiconductors. Cs(4)Pb(4)Ge(5)S(16) is luminescent with red emission.
研究了碱金属多硫化物熔剂（A₂Sₓ）（A = 碱金属）的路易斯碱度随x的变化对Pb和Sn与Ge各自反应活性的影响，发现这种影响很强。Cs₄Pb₄Ge₅S₁₆、K₂PbGe₂S₆和K₄Sn₃Ge₃S₁₄只能在S/A₂S比≥11的低碱度条件下制备。这些化合物呈现复杂结构且为半导体。Cs₄Pb₄Ge₅S₁₆发出红色荧光。
