Synthesis, characterization and luminescence properties of zinc(II) and cadmium(II) pseudohalide complexes derived from quinoline-N-oxide

• Three new d10 pseudohalide complexes with quinoline-N-oxide are reported.
• Compound 1 consists of discrete octahedral [Zn(quinoline-N-oxide)6]2+ and tetrahedral [Zn(NCS)4]2− complex ions.
• Complex 2 forms polymeric chains via di-μ1,1 azide bridges.
• Honeycomb-like layers are observed in the crystal structure of title complex 3.
• The three compounds exhibit luminescence properties.

The synthesis and structural characterization of three new mixed d10 metal pseudohalide complexes with quinoline-N-oxide, namely [Zn(quinoline-N-oxide)6][Zn(NCS)4] (1), [Zn(quinoline-N-oxide)(μ1,1-N3)2]n (2) and [Cd(μ-quinoline-N-oxide)(μN,S-NCS)2]n (3) are reported. Single crystal structure determination reveals that 1 consists of isolated octahedral [Zn(quinoline-N-oxide)6]2+ complex cations and tetrahedral [Zn(NCS)4]2− complex anions. Coordination number 5 around the Zn(II) center is observed in the polymeric chains of 2, where azide groups act in the di-μ1,1 bridging mode. Honeycomb-like layers are formed in 3, where octahedral Cd(II) centers are bridged by the μO,O quinoline-N-oxide molecules and μN,S-isothiocyanate anions. The solid state luminescence properties of the title compounds 1–3 are reported.

Three new complexes were structurally characterized with quinoline-N-oxide: [Zn(quinoline-N-oxide)6][Zn(NCS)4] (1), [Zn(quinoline-N-oxide)(μ1,1-N3)2]n (2) and [Cd(μ-quinoline-N-oxide)(μN,S-NCS)2]n (3). The luminescence properties of the complexes are reported.Figure optionsDownload as PowerPoint slide