| dc.description | A class of materials with the general formulation of MIMIII(XO4)2 (MI=Alkali metal, MIII = trivalente metal and X = W or
Mo) with structural importance and diferente properties exposed to the attention of researchers, especially when
doped with rare earth ions, which give the material luminescent properties. These properties can make the material
promisingly important for diverse applications, such as solar cells, light converting devices and sensors, depending
only on the changes in its structure and surface. This work was synthesized using co-precipitation method from
aqueous solutions tungstates and molybdates of zinc doped with rare earth ??ons (Scheme 1a [Zn0.95Eu0.05WO4],1b
[Zn0.95Eu0.05(WO4)0.5(MoO4)0.5],1c [Zn0.95Eu0.025Tb0.025WO4]) and coated with a thin layer of s??lica (scheme 1d)
using the hydrolysis and condensation of tetraethoxysilane (TEOS). For the phenantroline ligand functionalization, 3-
(chloropropyl)triethoxy-silane (CPES) was grafted onto the particle surfaces in their aqueous suspensions, and bound
to modified phenanthroline. For the synthesis of doped tungstates and molybdates, equivalent amounts of zinc,
terbium, and europium chlorides were added under stirring at 70 ??C for 1h. After drying, the material was ground with
TEOS, water, ethanol and remained (with catalyze acid) for 3h at 70 ??C under constant agitation. The 1,10-
Phenantroline (scheme 1e) has been nitrated (H2SO4/HNO3) (scheme 1f) and reduced (Sn/HCl) (scheme 1g and
infrared) to then be coupled to the modified particle. The final product was characterized. We are currently improving
and studying synthesis conditions and aplications. | |
