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Luminescent polyoxotungstoeuropate anion-pillared layered double hydroxides
Sousa, Filipa L.; Pillinger, Martyn; Ferreira, Rute A. Sá; Granadeiro, Carlos M.; Cavaleiro, Ana M. V.; Rocha, João; Carlos, Luís D.; Trindade, TitoNovel luminescent polyoxometalate anion-pillared layered double hydroxides (LDHs) were prepared by aqueous ion exchange of a Zn–Al LDH precursor in nitrate form with the europium-containing polyoxotungstate anions [EuW10O36]9–, [Eu(BW11O39)(H2O)3]6– and [Eu(PW11O39)2]11–. The host– guest interaction has a strong influence on the nature of the final intercalated species, as evidenced by elemental analy- Introduc...
Lanthanopolyoxotungstates in silica nanoparticles: multi-wavelength photolumine...
Granadeiro, Carlos M.; Ferreira, Rute A. S.; Soares-Santos, Paula C. R.; Carlos, Luís D.; Trindade, Tito; Nogueira, Helena I. S.Photoluminescent lanthanopolyoxotungstate core/shell nanoparticles are prepared by the encapsulation of lanthanide-containing polyoxometalates (POMs) with amorphous silica shells. The preparation of morphological well-defined core/shell nanoparticles is achieved by the hydrolysis of tetraethoxysilane in the presence of POMs using a reverse microemulsion method. The POMs used are decatungstolanthanoates of [Ln(W...
IR, Raman and SERS spectra of 2-(methoxycarbonylmethylsulfanyl)-3,5-dinitrobenz...
Raj,Asha; Raju,K.; Varghese,Hema Tresa; Granadeiro,Carlos M.; Nogueira,Helena I. S.; Panicker,C. Yohannan2-(Methoxycarbonylmethylsulfanyl)-3,5-dinitrobenzenecarboxylic acid was prepared by nucleophilic substitution. FT-IR and FT-Raman spectra of 2-(methoxycarbonylmethylsulfanyl)-3,5-dinitrobenzenecarboxylic acid were recorded and analyzed. Surface enhanced Raman scattering (SERS) spectrum was recorded on a silver colloid. The vibrational wavenumbers were computed by density functional theoretical (DFT) computation...
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