Electronic structure of V³⁺ in NaMgAl(ox)₃·9H₂O probed by Fourier transform spectroscopy

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• 作者：Kevin R. Kittilstved ; Andreas Hauser
• 关键词：Vanadium trisoxalate ; V³⁺ electronic structure ; Fourier transform spectroscopy ; Near-IR luminescence
• 刊名：Journal of Luminescence
• 出版年：2009
• 出版时间：December 2009
• 年：2009
• 卷：129
• 期：12
• 页码：1493-1496
• 全文大小：443 K

文摘

High-resolution Fourier transform absorption and luminescence spectroscopy reveal axial and rhombic zero-field splittings of the spin-forbidden electronic origins of V³⁺ in NaMgAl(ox)₃·9H₂O (ox=oxalate) single crystals below 25 K. The temperature dependence of the integrated absorption of the split features display behavior consistent with a Boltzmann distribution within the zero-field split ³Â₂ ground state of V³⁺. Weak luminescence is observed in the near-IR from the lowest energy spin-forbidden transition with a luminescence lifetime of less than 0.5 μs at 11 K and an estimated quantum efficiency of the order of 10⁻⁵.