title: {[Ga(en)3]2(Ge2Te15)}n: a polymeric semiconducting polytelluride with boat-shaped Te8(4-) rings and cross-shaped Te5(6-) units.
abstract: The reaction of the Zintl compound K(4)Ge(9) with Te and Ga(2)Te(3) 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(-) TeTe(4)(6-) 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.
authors.affiliation: Department of Chemistry, Northwestern University, Evanston, Illinois 60208, USA.
authors.forename: Qichun
authors.initials: Q
authors.lastname: Zhang
authors.forename: Christos D
authors.initials: CD
authors.lastname: Malliakas
authors.forename: Mercouri G
authors.initials: MG
authors.lastname: Kanatzidis