{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,1,17]],"date-time":"2026-01-17T18:51:12Z","timestamp":1768675872065,"version":"3.49.0"},"reference-count":43,"publisher":"Wiley","issue":"20-21","license":[{"start":{"date-parts":[[2018,5,17]],"date-time":"2018-05-17T00:00:00Z","timestamp":1526515200000},"content-version":"vor","delay-in-days":0,"URL":"http:\/\/onlinelibrary.wiley.com\/termsAndConditions#vor"}],"funder":[{"DOI":"10.13039\/501100001871","name":"Funda\u00e7\u00e3o para a Ci\u00eancia e a Tecnologia","doi-asserted-by":"publisher","award":["UID\/CTM\/50011\/2013"],"award-info":[{"award-number":["UID\/CTM\/50011\/2013"]}],"id":[{"id":"10.13039\/501100001871","id-type":"DOI","asserted-by":"publisher"}]},{"DOI":"10.13039\/501100001871","name":"Funda\u00e7\u00e3o para a Ci\u00eancia e a Tecnologia","doi-asserted-by":"publisher","award":["SFRH\/BPD\/95032\/2013"],"award-info":[{"award-number":["SFRH\/BPD\/95032\/2013"]}],"id":[{"id":"10.13039\/501100001871","id-type":"DOI","asserted-by":"publisher"}]}],"content-domain":{"domain":["chemistry-europe.onlinelibrary.wiley.com"],"crossmark-restriction":true},"short-container-title":["Eur J Inorg Chem"],"published-print":{"date-parts":[[2018,6,7]]},"abstract":"<jats:p>The hydrothermal synthesis and structural characterization of new trivalent rare\u2010earth germanates, Na<jats:sub>4<\/jats:sub>[(Y<jats:sub>1\u2013<jats:italic>a<\/jats:italic><\/jats:sub>Ln<jats:italic><jats:sub>a<\/jats:sub><\/jats:italic>)<jats:sub>2<\/jats:sub>Ge<jats:sub>4<\/jats:sub>O<jats:sub>13<\/jats:sub>] (Ln = Eu, Tb, or Yb and Er; <jats:italic>a<\/jats:italic> = 0.05, 0.1) and Na<jats:sub>4<\/jats:sub>[(Yb<jats:sub>0.9<\/jats:sub>Er<jats:sub>0.1<\/jats:sub>)<jats:sub>2<\/jats:sub>Ge<jats:sub>4<\/jats:sub>O<jats:sub>13<\/jats:sub>] are reported. The structure of these solids was solved by single\u2010crystal X\u2010ray diffraction (150 K). The materials crystallize in the orthorhombic non\u2010centrosymmetric <jats:italic>Pna<\/jats:italic>2<jats:sub>1<\/jats:sub> space group, and exhibit a framework comprising unprecedented anionic tetrameric [Ge<jats:sub>4<\/jats:sub>O<jats:sub>13<\/jats:sub>]<jats:sup>10\u2013<\/jats:sup> units, tetrameric units of {GeO<jats:sub>4<\/jats:sub>} tetrahedra, and isolated dimeric units encompassing two distinct distorted {REO<jats:sub>6<\/jats:sub>} octahedra. These rare\u2010earth germanates feature interesting photoluminescence properties in the visible and near\u2010infrared spectral regions. Eu<jats:sup>3+<\/jats:sup> photoluminescence confirms the presence of two distinct rare\u2010earth sites. Energy transfer between the latter sites is shown for the Yb<jats:sup>3+<\/jats:sup>\/Er<jats:sup>3+<\/jats:sup> pair, both displaying significant near\u2010infrared emission. Isomorphous Na<jats:sub>4<\/jats:sub>[(Yb<jats:sub>0.9<\/jats:sub>Er<jats:sub>0.1<\/jats:sub>)<jats:sub>2<\/jats:sub>Ge<jats:sub>4<\/jats:sub>O<jats:sub>13<\/jats:sub>] features up\u2010conversion emission, an unusual property among rare\u2010earth crystalline germanates.<\/jats:p>","DOI":"10.1002\/ejic.201800153","type":"journal-article","created":{"date-parts":[[2018,4,6]],"date-time":"2018-04-06T18:36:58Z","timestamp":1523039818000},"page":"2444-2451","update-policy":"https:\/\/doi.org\/10.1002\/crossmark_policy","source":"Crossref","is-referenced-by-count":6,"title":["Rare\u2010Earth Germanate Visible, Near\u2010Infrared, and Up\u2010Conversion Emitters"],"prefix":"10.1002","volume":"2018","author":[{"ORCID":"https:\/\/orcid.org\/0000-0003-4394-045X","authenticated-orcid":false,"given":"Duarte","family":"Ananias","sequence":"first","affiliation":[{"name":"Department of Chemistry CICECO \u2010 Aveiro Institute of Materials University of Aveiro  3810\u2010193 Aveiro Portugal"}]},{"ORCID":"https:\/\/orcid.org\/0000-0003-2051-5645","authenticated-orcid":false,"given":"Filipe A.","family":"Almeida Paz","sequence":"additional","affiliation":[{"name":"Department of Chemistry CICECO \u2010 Aveiro Institute of Materials University of Aveiro  3810\u2010193 Aveiro Portugal"}]},{"ORCID":"https:\/\/orcid.org\/0000-0003-4747-6535","authenticated-orcid":false,"given":"Lu\u00eds D.","family":"Carlos","sequence":"additional","affiliation":[{"name":"Department of Physics CICECO \u2010 Aveiro Institute of Materials University of Aveiro  3810\u2010193 Aveiro Portugal"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-0417-9402","authenticated-orcid":false,"given":"Jo\u00e3o","family":"Rocha","sequence":"additional","affiliation":[{"name":"Department of Chemistry CICECO \u2010 Aveiro Institute of Materials University of Aveiro  3810\u2010193 Aveiro Portugal"}]}],"member":"311","published-online":{"date-parts":[[2018,5,17]]},"reference":[{"key":"e_1_2_6_2_1","doi-asserted-by":"publisher","DOI":"10.1021\/ja901820z"},{"key":"e_1_2_6_2_2","doi-asserted-by":"publisher","DOI":"10.1002\/anie.200602849"},{"key":"e_1_2_6_2_3","doi-asserted-by":"publisher","DOI":"10.1002\/ange.200602849"},{"key":"e_1_2_6_2_4","doi-asserted-by":"publisher","DOI":"10.1016\/j.jallcom.2003.11.103"},{"key":"e_1_2_6_2_5","doi-asserted-by":"publisher","DOI":"10.1021\/ja036988p"},{"key":"e_1_2_6_3_1","doi-asserted-by":"publisher","DOI":"10.1021\/ja047905n"},{"key":"e_1_2_6_3_2","doi-asserted-by":"publisher","DOI":"10.1021\/cm702524n"},{"key":"e_1_2_6_4_1","doi-asserted-by":"publisher","DOI":"10.1002\/adma.200304474"},{"key":"e_1_2_6_4_2","doi-asserted-by":"publisher","DOI":"10.1016\/j.optmat.2005.09.064"},{"key":"e_1_2_6_4_3","doi-asserted-by":"publisher","DOI":"10.1021\/ja512745y"},{"key":"e_1_2_6_5_1","doi-asserted-by":"publisher","DOI":"10.1016\/j.micromeso.2012.04.032"},{"key":"e_1_2_6_6_1","doi-asserted-by":"publisher","DOI":"10.1039\/b716654k"},{"key":"e_1_2_6_7_1","doi-asserted-by":"publisher","DOI":"10.1002\/cjoc.201200583"},{"key":"e_1_2_6_8_1","doi-asserted-by":"publisher","DOI":"10.1002\/ejic.201200200"},{"key":"e_1_2_6_9_1","first-page":"3424","volume":"16","author":"Yeon J.","year":"2014","journal-title":"Solid State Sci."},{"key":"e_1_2_6_10_1","doi-asserted-by":"publisher","DOI":"10.1021\/ic3005129"},{"key":"e_1_2_6_11_1","doi-asserted-by":"publisher","DOI":"10.1039\/C4RA03048F"},{"key":"e_1_2_6_12_1","first-page":"591","volume":"211","author":"Gorbunov Y. A.","year":"1973","journal-title":"Dokl. Akad. Nauk SSSR"},{"key":"e_1_2_6_13_1","doi-asserted-by":"publisher","DOI":"10.1107\/S0021889807067908"},{"key":"e_1_2_6_14_1","doi-asserted-by":"publisher","DOI":"10.1107\/S0021889802022112"},{"key":"e_1_2_6_14_2","first-page":"C34","volume":"46","author":"Spek A. L.","year":"1990","journal-title":"Acta Crystallogr., Sect. A: Found. Crystallogr."},{"key":"e_1_2_6_15_1","doi-asserted-by":"publisher","DOI":"10.1021\/cg500498k"},{"key":"e_1_2_6_16_1","doi-asserted-by":"publisher","DOI":"10.1039\/b406082m"},{"key":"e_1_2_6_17_1","doi-asserted-by":"publisher","DOI":"10.1002\/ejic.201701201"},{"key":"e_1_2_6_17_2","doi-asserted-by":"publisher","DOI":"10.1002\/chem.201600860"},{"key":"e_1_2_6_17_3","doi-asserted-by":"publisher","DOI":"10.1039\/B905604C"},{"key":"e_1_2_6_18_1","doi-asserted-by":"publisher","DOI":"10.1016\/j.cplett.2005.09.001"},{"key":"e_1_2_6_19_1","volume-title":"Energy Level Structure and Transition Probabilities of the Trivalent Lanthanides in LaF3","author":"Carnall W. T.","year":"1977"},{"key":"e_1_2_6_20_1","doi-asserted-by":"publisher","DOI":"10.1016\/S0022-2313(00)00214-3"},{"key":"e_1_2_6_21_1","doi-asserted-by":"publisher","DOI":"10.1107\/S0021889893002018"},{"key":"e_1_2_6_22_1","unstructured":"APEX2 Data Collection Software Version 2.1\u2010RC13 Bruker AXS Delft The Netherlands 2006."},{"key":"e_1_2_6_23_1","unstructured":"Cryopad Remote monitoring and control Version 1.451 Oxford Cryosystems Oxford United Kingdom 2006."},{"key":"e_1_2_6_24_1","unstructured":"SAINT+ Data Integration Engine v. 7.23a Bruker AXS Madison Wisconsin USA \u00a91997\u20132005."},{"key":"e_1_2_6_25_1","unstructured":"G. M.Sheldrick SADABS v.2.01 Bruker\/Siemens Area Detector Absorption Correction Program Bruker AXS Madison Wisconsin USA 1998."},{"key":"e_1_2_6_26_1","doi-asserted-by":"publisher","DOI":"10.1107\/S0108767307043930"},{"key":"e_1_2_6_26_2","unstructured":"b)G. M.Sheldrick SHELXS\u201097 Program for Crystal Structure Solution University of G\u00f6ttingen 1997"},{"key":"e_1_2_6_27_1","unstructured":"G. M. Sheldrick SHELXL \u2013 Crystal Structure Refinement Version2017\/1 Program for Crystal Structure Refinement University of G\u00f6ttingen1993\u20132017;"},{"key":"e_1_2_6_27_2","doi-asserted-by":"publisher","DOI":"10.1107\/S2053229614024218"},{"key":"e_1_2_6_28_1","doi-asserted-by":"publisher","DOI":"10.1107\/S0021889811043202"},{"key":"e_1_2_6_29_1","doi-asserted-by":"publisher","DOI":"10.1107\/S0021889800007184"},{"key":"e_1_2_6_29_2","doi-asserted-by":"publisher","DOI":"10.1107\/S0108767399004262"},{"key":"e_1_2_6_29_3","doi-asserted-by":"publisher","DOI":"10.1107\/S0108767383001762"},{"key":"e_1_2_6_30_1","unstructured":"K. Brandenburg DIAMOND Version 3.2f. Crystal Impact GbR Bonn Germany1997\u20132010."}],"container-title":["European Journal of Inorganic Chemistry"],"original-title":[],"language":"en","link":[{"URL":"https:\/\/api.wiley.com\/onlinelibrary\/tdm\/v1\/articles\/10.1002%2Fejic.201800153","content-type":"application\/pdf","content-version":"vor","intended-application":"text-mining"},{"URL":"https:\/\/onlinelibrary.wiley.com\/doi\/pdf\/10.1002\/ejic.201800153","content-type":"application\/pdf","content-version":"vor","intended-application":"text-mining"},{"URL":"https:\/\/onlinelibrary.wiley.com\/doi\/full-xml\/10.1002\/ejic.201800153","content-type":"application\/xml","content-version":"vor","intended-application":"text-mining"},{"URL":"https:\/\/chemistry-europe.onlinelibrary.wiley.com\/doi\/pdf\/10.1002\/ejic.201800153","content-type":"unspecified","content-version":"vor","intended-application":"similarity-checking"}],"deposited":{"date-parts":[[2025,10,13]],"date-time":"2025-10-13T20:42:25Z","timestamp":1760388145000},"score":1,"resource":{"primary":{"URL":"https:\/\/chemistry-europe.onlinelibrary.wiley.com\/doi\/10.1002\/ejic.201800153"}},"subtitle":[],"short-title":[],"issued":{"date-parts":[[2018,5,17]]},"references-count":43,"journal-issue":{"issue":"20-21","published-print":{"date-parts":[[2018,6,7]]}},"alternative-id":["10.1002\/ejic.201800153"],"URL":"https:\/\/doi.org\/10.1002\/ejic.201800153","archive":["Portico"],"relation":{},"ISSN":["1434-1948","1099-0682"],"issn-type":[{"value":"1434-1948","type":"print"},{"value":"1099-0682","type":"electronic"}],"subject":[],"published":{"date-parts":[[2018,5,17]]},"assertion":[{"value":"2018-02-01","order":0,"name":"received","label":"Received","group":{"name":"publication_history","label":"Publication History"}},{"value":"2018-05-17","order":3,"name":"published","label":"Published","group":{"name":"publication_history","label":"Publication History"}}]}}