Influence of coprecipitation conditions on properties of layered gadolinium-terbium hydroxides and hybrid phosphors with terephthalate

In this work, powders of layered Gd-Tb hydroxonitrates and powders of hybrid organo-inorganic Gd-Tb phosphors were obtained by controlled double-jet deposition at different pH values of the medium as a result of intercalation of terephthalate ions into the structure of the obtained layered Gd-Tb hydroxonitrates. It is found that increasing the pH value of the controlled double-jet deposition process leads to a significant decrease in the ordering of the structure of layered Gd-Tb hydroxonitrates. The excellent exchange capacity of interlayer nitrate ions of layered Gd-Tb nitrate hydroxides for terephthalate ions has been demonstrated. It was observed that upon exposure to UV radiation, the fluorescence properties of Gd-Tb-terephthalate hybrid compounds depend on the degree of ordering of the system – the higher the size of the coherent scattering regions of these powders, the higher their fluorescence intensity.