Synthesis and properties of tetracyanamidosilicates ARE[Si(CN2)4].
Tetracyanamidosilicates of the type ARE[Si(CN(2))(4)] with A = K, Rb, and Cs and RE = Y and La-Lu have been prepared by a solid-state metathesis reaction. The potassium compounds with RE = La-Gd crystallize orthorhombically in the space group P2(1)2(1)2. Rubidium as well as cesium compounds crystallize tetragonally in the space group I4. The luminescent properties of ARE[Si(CN(2))(4)]:Ln compounds with RE = Y, La, and Gd doped with 5 mol % Ln = Ce, Eu, or Tb were investigated. Temperature-dependent magnetic susceptibilities were measured for KGd[Si(CN(2))(4)]. The value of the magnetic moment is 7.3 mu(B)/Gd(3+) ion, which is in line with the expected value for the [Xe]4f(7) configuration of Gd(3+).
Institut für Anorganische Chemie, Universität Tübingen, Ob dem Himmelreich 7, D-72074 Tübingen, Germany.
Jochen
J
Glaser
Helga
H
Bettentrup
Thomas
T
Jüstel
H-Jürgen
HJ
Meyer