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Structural elucidation of the Sm<jats:sup>3+<\/jats:sup> analogue (isomorphous with the Eu<jats:sup>3+<\/jats:sup>, Gd<jats:sup>3+<\/jats:sup>, and Tb<jats:sup>3+<\/jats:sup> frameworks) using single\u2010crystal synchrotron X\u2010ray diffraction and solid\u2010state NMR spectroscopy reveal disorder in the Si(1) second coordination sphere. La\u2010AV\u201021 presents a distinct framework. These materials combine microporosity and interesting photoluminescence features with structural flexibility that allows the introduction of a second or third type of lanthanide center. Room\u2010temperature lifetime decay dynamics have been used to estimate the Ln<jats:sup>3+<\/jats:sup>\uf8ffLn<jats:sup>3+<\/jats:sup> distances and the maximum distance over which energy transfer is active. Though the majority of Ln<jats:sup>3+<\/jats:sup> centers occupy regular framework positions, the Ln(2) defect centers are disordered over the Na(1) sites in the pores and greatly influence the energy\u2010transfer process, providing a unique opportunity for studying the relationship between structural disorder and photoluminescence properties in framework solids.<\/jats:p>","DOI":"10.1002\/chem.200800172","type":"journal-article","created":{"date-parts":[[2008,7,21]],"date-time":"2008-07-21T09:38:58Z","timestamp":1216633138000},"page":"8157-8168","source":"Crossref","is-referenced-by-count":18,"title":["Photoluminescent Microporous Lanthanide Silicate AV\u201021 Frameworks"],"prefix":"10.1002","volume":"14","author":[{"given":"Collin\u2005M.","family":"Kowalchuk","sequence":"first","affiliation":[]},{"given":"Filipe\u2005A.\u2005A.","family":"Paz","sequence":"additional","affiliation":[]},{"given":"Duarte","family":"Ananias","sequence":"additional","affiliation":[]},{"given":"Philip","family":"Pattison","sequence":"additional","affiliation":[]},{"given":"Lu\u00eds\u2005D.","family":"Carlos","sequence":"additional","affiliation":[]},{"given":"Jo\u00e3o","family":"Rocha","sequence":"additional","affiliation":[]}],"member":"311","published-online":{"date-parts":[[2008,9,15]]},"reference":[{"key":"e_1_2_6_1_2","doi-asserted-by":"publisher","DOI":"10.1002\/(SICI)1099-0682(200005)2000:5<801::AID-EJIC801>3.0.CO;2-E"},{"key":"e_1_2_6_2_2","doi-asserted-by":"publisher","DOI":"10.1007\/978-94-010-9529-7"},{"key":"e_1_2_6_3_2","doi-asserted-by":"publisher","DOI":"10.1016\/j.cossms.2003.10.003"},{"key":"e_1_2_6_4_2","doi-asserted-by":"publisher","DOI":"10.1021\/ja010244z"},{"key":"e_1_2_6_5_2","doi-asserted-by":"publisher","DOI":"10.1021\/ja047905n"},{"key":"e_1_2_6_6_2","doi-asserted-by":"publisher","DOI":"10.1021\/ja036988p"},{"key":"e_1_2_6_7_2","doi-asserted-by":"publisher","DOI":"10.1021\/jp062758w"},{"key":"e_1_2_6_8_2","doi-asserted-by":"publisher","DOI":"10.1002\/ange.200602849"},{"key":"e_1_2_6_8_3","doi-asserted-by":"publisher","DOI":"10.1002\/anie.200602849"},{"key":"e_1_2_6_9_2","doi-asserted-by":"publisher","DOI":"10.1021\/cm061578w"},{"key":"e_1_2_6_10_2","first-page":"3028","volume-title":"Proceedings: 14th International Zeolite Conference","author":"Rocha J.","year":"2004"},{"key":"e_1_2_6_11_2","doi-asserted-by":"publisher","DOI":"10.1039\/b206738m"},{"key":"e_1_2_6_12_2","unstructured":"\u00a0"},{"key":"e_1_2_6_13_2","doi-asserted-by":"publisher","DOI":"10.1107\/S0108768199015785"},{"key":"e_1_2_6_14_2","doi-asserted-by":"publisher","DOI":"10.1107\/S0108768199015797"},{"key":"e_1_2_6_15_2","first-page":"728","volume":"25","author":"Shumyatskaya N. 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