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Keggin\u2010type europium polyoxometalates Eu(PW<jats:sub>11<\/jats:sub>)<jats:italic><jats:sub>x<\/jats:sub><\/jats:italic> (<jats:italic>x<\/jats:italic> = 1 and 2) with different europium coordination environments were prepared by using simple methodologies and no expensive reactants. These luminescent compounds were then encapsulated into silica nanoparticles for the first time through the water\u2010in\u2010oil microemulsion methodology with a nonionic surfactant. The europium polyoxometalates and the nanoparticles were characterized by using several techniques [FTIR, FT\u2010Raman, <jats:sup>31<\/jats:sup>P magic angle spinning (MAS) NMR, and TEM\/energy\u2010dispersive X\u2010ray spectroscopy (TEM\u2010EDS), AFM, dynamic light scattering (DLS), and inductively coupled plasma MS (ICP\u2010MS) analysis]. The stability of the material and the integrity of the europium compounds incorporated were also examined. Furthermore, the photoluminescence properties of the Eu(PW<jats:sub>11<\/jats:sub>)<jats:italic><jats:sub>x<\/jats:sub><\/jats:italic>@SiO<jats:sub>2<\/jats:sub> nanomaterials were evaluated and compared with those of the free europium polyoxometalates. The silica surface of the most stable nanoparticles was successfully functionalized with appropriate organosilanes to enable the covalent binding of oligonucleotides.<\/jats:p>","DOI":"10.1002\/ejic.201201482","type":"journal-article","created":{"date-parts":[[2013,4,12]],"date-time":"2013-04-12T07:28:07Z","timestamp":1365751687000},"page":"2877-2886","update-policy":"https:\/\/doi.org\/10.1002\/crossmark_policy","source":"Crossref","is-referenced-by-count":30,"title":["Europium Polyoxometalates Encapsulated in Silica Nanoparticles \u2013 Characterization and Photoluminescence Studies"],"prefix":"10.1002","volume":"2013","author":[{"given":"Cristina S.","family":"Neves","sequence":"first","affiliation":[]},{"given":"Carlos M.","family":"Granadeiro","sequence":"additional","affiliation":[]},{"given":"Lu\u00eds","family":"Cunha\u2010Silva","sequence":"additional","affiliation":[]},{"given":"Duarte","family":"Ananias","sequence":"additional","affiliation":[]},{"given":"Sandra","family":"Gago","sequence":"additional","affiliation":[]},{"given":"Gabriel","family":"Feio","sequence":"additional","affiliation":[]},{"given":"Patricia A.","family":"Carvalho","sequence":"additional","affiliation":[]},{"given":"Peter","family":"Eaton","sequence":"additional","affiliation":[]},{"given":"Salete S.","family":"Balula","sequence":"additional","affiliation":[]},{"given":"Eul\u00e1lia","family":"Pereira","sequence":"additional","affiliation":[]}],"member":"311","published-online":{"date-parts":[[2013,4,12]]},"reference":[{"key":"e_1_2_6_1_2","unstructured":"\u00a0"},{"key":"e_1_2_6_2_2","doi-asserted-by":"publisher","DOI":"10.1002\/chem.200501002"},{"key":"e_1_2_6_3_2","doi-asserted-by":"publisher","DOI":"10.1016\/j.nantod.2010.05.006"},{"key":"e_1_2_6_4_2","unstructured":"\u00a0"},{"key":"e_1_2_6_5_2","volume-title":"Handbook on the Physics and Chemistry of Rare Earths","author":"Pope M. 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