@Article{JLumin_129_1493, author = {K.R. Kittilstved and A. Hauser}, title = {{Electronic structure of V$^{3+}$ in NaMgAl(ox)$_3$·9H$_2$O probed by Fourier transform spectroscopy}}, journal= {J. Lumin.}, ISSN = {0022-2313}, volume= {129}, number= {12}, pages = {1493-1496}, url = {http://dx.doi.org/10.1016/j.jlumin.2009.02.021}, eprint= {http://www.unige.ch/sciences/chifi/publis/refs_pdf/ref00988.pdf}, doi= {10.1016/j.jlumin.2009.02.021}, keywords= {Vanadium trisoxalate;V$^{3+}$ electronic structure;Fourier transform spectroscopy;Near-IR luminescence}, abstract = {{High-resolution Fourier transform absorption and luminescence spectroscopy reveal axial and rhombic zero-field splittings of the spin-forbidden electronic origins of V$^{3+}$ in NaMgAl(ox)$_3$·9H$_2$O (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 $^{3}$Â$_2$ ground state of V$^{3+}$. Weak luminescence is observed in the near-IR from the lowest energy spin-forbidden transition with a luminescence lifetime of less than 0.5 $\mu$s at 11 K and an estimated quantum efficiency of the order of 10$^{-5}$}}, year = {2009} }