Three New Ln‐Decavanadates Materials:Synthesis, Structure, and Photoluminescent Sensing for Detection of Zn²⁺ and Co²⁺

Abstract

Three new compounds, [Ln(H2O)8]2[V10O28]·8H2O [Ln = Ho (1), Tb (2)] and [Eu(H2O)8]2[V10O28]·9H2O (3), were successfully synthesized by evaporating the mixture of K6V10O28·10H2O and LnCl3·6H2O. Notably, three vanadates are composed of [Ln(H2O)8]3+ cation, decavanadates ([V10O28]6–) anion. Meanwhile, free water molecules generate different type water clusters to connect [V10O28]6– anions and coordination cations to form 3D supramolecular structure. The fluorescence measurements reveal that characteristic photoluminescence of TbIII and EuIII is quenched in presence of [V10O28]6–, then the impacts of variational decavanadates ions concentration on the fluorescence intensities of LnCl3 (Ln = Tb, Eu) systems and different acetate solution [M(CH3COO)2; M = Ni, Cr, Cu, Co, Zn] on fluorescence intensities of Ln‐decavanadates (Ln = Eu, Tb) systems are investigated.