@Article{JPhysChemA_104_883, author = {M.E. {Von Arx} and E. Burattini and A. Hauser and L. {Van Pieterson} and R. Pellaux and S Decurtins}, title = {{Luminescence and Energy Transfer of [Ru(bpy)$_3$]$^{2+}$, [Cr(ox)$_3$]$^{3-}$, and [Os(bpy)$_3$]$^{2+}$ in Three-Dimensional Oxalato-Networks}}, journal= {J. Phys. Chem. A}, ISSN = {1089-5639}, volume= {104}, number= {5}, pages = {883-893}, url = {http://pubs.acs.org:80/cgi-bin/sample.cgi/jpcafh/2000/104/i05/abs/jp993368v.html}, eprint= {http://www.unige.ch/sciences/chifi/publis/refs_pdf/ref00454.pdf}, doi= {10.1021/jp993368v}, abstract = {{Luminescence and energy transfer in [Zn$_{1-}${\em $_{x}$}Ru{\em $_{x}$}(bpy)$_{3}$][NaAl$_{1-}${\em $_{y}$}Cr{\em $_{y}$}(ox)$_{3}$] ({\em x} ≈ 0.01, {\em y }= 0.006 - 0.22; bpy = 2,2‘-bipyridine, ox = C$_{2}$O$_{4}^{2-}$) and [Zn$_{1-{\em x-y}}$Ru{\em $_{x}$}Os{\em $_{y}$}(bpy)$_{3}$][NaAl(ox)$_{3}$] ({\em x} ≈ 0.01, {\em y} = 0.012) are presented and discussed. Surprisingly, the luminescence of the isolated luminophores [Ru(bpy)$_{3}$]$^{2+}$ and [Os(bpy)$_{3}$]$^{2+}$ in [Zn(bpy)$_{3}$][NaAl(ox)$_{3}$] is hardly quenched at room temperature. Steady-state luminescence spectra and decay curves show that energy transfer occurs between [Ru(bpy)$_{3}$]$^{2+}$ and [Cr(ox)$_{3}$]$^{3-}$ and between [Ru(bpy)$_{3}$]$^{2+}$ and [Os(bpy)$_{3}$]$^{2+}$ in [Zn$_{1-}${\em $_{x}$}Ru{\em $_{x}$}(bpy)$_{3}$][NaAl$_{1-}${\em $_{y}$}Cr{\em $_{y}$}(ox)$_{3}$] and [Zn$_{1-{\em x-y}}$Ru{\em $_{x}$}Os{\em $_{y}$}(bpy)$_{3}$] [NaAl(ox)$_{3}$], respectively. For a quantitative investigation of the energy transfer, a shell type model is developed, using a Monte Carlo procedure and the structural parameters of the systems. A good description of the experimental data is obtained assuming electric dipole-electric dipole interaction between donors and acceptors, with a critical distance {\em R}$_{c}$ for [Ru(bpy)$_{3}$]$^{2+}$ to [Cr(ox)$_{3}$]$^{3-}$ energy transfer of 15 Å and for [Ru(bpy)$_{3}$]$^{2+}$ to [Os(bpy)$_{3}$]$^{2+}$ energy transfer of 33 Å. These values are in good agreement with those derived using the Förster-Dexter theory.}}, year = {2000} }