Synthesis, spectral characterization and photoluminescence properties of cadmium(II) complexes of N-[(2-pyridyl)methyliden]-α (or β)-aminonaphthalene (α- or β-NaiPy) and comparison with the complexes of 1-alkyl-2-(naphthyl-α (or β)-azo)imidazole. Single crystal X-ray structure of [Cd(β-NaiPy) 2(ONO 2) 2]

• Published in: Polyhedron 2007-02, Vol.26 (3), p.555-562
• Main Authors: Das, D., Chand, B.G., Dinda, J., Sinha, C.
• Format: Article
• Language: English
• Subjects: Cadmium(II); Crystal structure; Luminescence; Naphthylamine Schiff base; Naphthylazoimidazoles
• ISSN: 0277-5387
• DOI: 10.1016/j.poly.2006.08.014

Cadmium(II) complexes of N-[(2-pyridyl)methyliden]-α (or β)-aminonaphthalene (α- or β-NaiPy) are described. They have been spectroscopically characterized and structural confirmation has been carried out by an X-ray diffraction study in one case. The complexes are highly fluorescent. Naphthylazoimidazole complexes are non-fluorescent. Cadmium(II) complexes of N-[(2-pyridyl)methyliden]-α (or β)-aminonaphthalene (α or β-NaiPy) and 1-alkyl-2-(naphthyl-α (or β)-azo)imidazoles (α- or β-NaiR) using Cl −, ClO 4 - and NO 3 - as anions are spectroscopically characterized. Molar conductance data in nitromethane show that the chloro and nitrite compounds are non-conducting, while the perchlorate complexes are 1:2 electrolytes. The single crystal X-ray structure of [Cd(N-{(2-pyridyl)methyliden}-β-aminonaphthalene) 2(ONO 2) 2] has been determined. The luminescence properties of Cd(II) complexes of α/β-NaiPy are studied and they exhibit ligand centered π–π ∗ emissions. Naphthylazoimidazoles and their cadmium complexes are non-fluorescent.