Inorganic Chemistry, Vol.48, No.23, 10910-10912, 2009
{[Ga(en)(3)](2)(Ge2Te15)}(n): A Polymeric Semiconducting Polytelluride with Boat-Shaped Te-8(4-) Rings and Cross-Shaped Te-5(6-) Units
The reaction of the Zintl compound K4Ge9 with Te and Ga2Te3 in ethylenediamine (en) at 190 degrees C gave the germanium polytelluride {[Ga(en)(3)](2)[(GeTe)(2)(Te-5)(6-)(Te-8)(4-)]}(n) (1). The single-crystal structure analysis revealed that 1 has two different polytelluride fragments: cross-shaped 36-e(-) TeTe46- anions and boat-shaped 52-e(-) Te-8(4-) rings. The new material is a p-type semiconductor at room temperature and switches to n-type at 380 K.