Structural characterization and luminescence properties of an isonicotinic acid N-oxide Mn(II) complex
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Abstract
An isonicotinic acid N-oxide Mn(II) compound was synthesized and characterized on the basis of elemental analysis and X-ray crystallography. In the complex, Mn(II) ions are coordinated by six water molecules, and the coordination number of the Mn(II) ion is six. FTIR spectra of the compound free isonicotinic acid N-oxide (INO) have been recorded in the range 4000-400 cm(-1) Cathodoluminescence (CL) spectra from the Mn(II) complex have been recorded. The luminescence data were interpreted in terms of the emission band at 480 nm. The green luminescence (similar to480 nm) arises from the Mn2+ transition T-4(1) ((4)G)-->(6)A(1) (S-6). It shows weak vibronic structure. short lifetimes less than 250 mus, and indicates that Mn2+ is octahedrally coordinated, occupying sites with similar distortions. The lifetime and intensity of the signal is temperature dependent, and the parameters are reported for the 480 nm emission line. (C) 2004 Elsevier Ltd. All rights reserved.