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A class of novel multifunctional hybrids assembled by lanthanide polyoxometalates, ionic liquid and lanthanide complexes were prepared through the reactions of ion exchange and coordination in mild conditions. These hybrids possess two luminescence centers, one is lanthanide polyoxometalates ([EuW10O36]9− or [TbW10O36]9−), the other is lanthanide complexes of 1,10-phenanthroline (phen) (or 2,2′-bipyridine (bpy)) and ionic liquid (1-methyl-3-propionic imidazole unit). Fourier transform infrared (FTIR) spectra, X-ray diffraction (XRD) analysis, thermo-gravimetric analysis (TGA), UV/vis diffuse reflectance spectra and photoluminescent properties are utilized to characterize these hybrid materials. The results reveal that all hybrids possess amorphous microstructures and are composed of inorganic polyoxometalates and lanthanide nitrate through chemical bonds. Most hybrids exhibit outstanding luminescent properties such as high quantum efficiency and long lifetimes. Moreover, the luminescent color of them can be tuned and even the white luminescence can be integrated. [ABSTRACT FROM AUTHOR]

Highlights: [•] Novel linkages of ionic liquid. [•] New lanthanide hybrids of mesoporous silica with POMs. [•] Luminescence color integration. [ABSTRACT FROM AUTHOR]

In this paper, we put forward a strategy to assemble a novel series of multi-component photofunctional hybrid materials (named as Eu-Si-P1(2,3)) centered with europium polyoxometalates (Na9EuW10O36·32H2O, abbreviated as EuW10) and polyester modified silane (P1-Si, P2-Si, P3-Si, P1 = poly glycohol, P2 = bis(2-hydroxyethyl)ether, P3 = 2-hydroxyethyl methacrylate) through an ionic liquid compound (1-methyl-3-(trimethoxysilylpropyl) imidazolium chloride, IM+Cl−) as the double functional linker. Furthermore, using Pluronic P123 surfactant as a template to control the sol–gel process of organically modified siloxane precursors, Eu-SBA15-P1(2,3) hybrids with mesoporous silica are constructed correspondingly. The results reveal that Eu-Si-P1(2,3) hybrids present the lower red/orange intensity ratio, longer lifetime and higher quantum yield than Eu-SBA15-P1(2,3) hybrids. The luminescent lifetime and quantum efficiency of Eu-Si-P1(2,3) hybrids are comparable with EuW10 compounds in spite of their low concentration of photoactive EuW10, which is important for practical applications. The CIE chromatic coordinates of some systems are close to the cool-white region and can be expected to be utilized as cool white lighting (close to sunlight). [ABSTRACT FROM AUTHOR]