{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2025,11,1]],"date-time":"2025-11-01T21:27:33Z","timestamp":1762032453714,"version":"build-2065373602"},"reference-count":32,"publisher":"Wiley","issue":"7","license":[{"start":{"date-parts":[[2004,2,16]],"date-time":"2004-02-16T00:00:00Z","timestamp":1076889600000},"content-version":"vor","delay-in-days":0,"URL":"http:\/\/onlinelibrary.wiley.com\/termsAndConditions#vor"}],"content-domain":{"domain":["chemistry-europe.onlinelibrary.wiley.com"],"crossmark-restriction":true},"short-container-title":["Eur J Inorg Chem"],"published-print":{"date-parts":[[2004,4]]},"abstract":"<jats:title>Abstract<\/jats:title><jats:p>Zn\u2212Al layered double hydroxides (LDHs) intercalated by ferrocenecarboxylate (FcCOO) and 1,1\u2032\u2010ferrocenedicarboxylate [Fc(COO)<jats:sub>2<\/jats:sub>] anions have been prepared by co\u2010precipitation from aqueous solution. The Zn\/Al ratio in the final materials was in the range of 1.8\u22121.9. Powder X\u2010ray diffraction (XRD) indicates that the material Zn<jats:sub>2<\/jats:sub>Al\u2212Fc(COO)<jats:sub>2<\/jats:sub> contains a monolayer of guest anions resulting in a basal spacing of 15.5 \u00c5. The material Zn<jats:sub>2<\/jats:sub>Al\u2212FcCOO exhibits a basal spacing of 20.0 \u00c5, consistent with the formation of a bilayer of organometallic guest species. FTIR, FT Raman and <jats:sup>13<\/jats:sup>C MAS NMR spectroscopy confirm the presence of structurally intact ferrocenecarboxylate and 1,1\u2032\u2010ferrocenedicarboxylate anions. The nature of the Al centers in the samples was probed by 1\u2010 and 2\u2010D (triple\u2010quantum) <jats:sup>27<\/jats:sup>Al MAS NMR spectroscopy. Thermal properties were studied by thermogravimetric analysis and by measuring powder XRD patterns at increasing temperatures in the range of 25\u2212450 \u00b0C. Up to 160 \u00b0C the materials lose interlayer water molecules. Dehydration of Zn<jats:sub>2<\/jats:sub>Al\u2212Fc(COO)<jats:sub>2<\/jats:sub> prompts reorientation of the ferrocene guest anions, resulting in the formation of a collapsed phase with an interlayer separation of 12.3 \u00c5. The structural transformation is fully reversible upon hydration. Heat treatment of Zn<jats:sub>2<\/jats:sub>Al\u2212FcCOO only resulted in a gradual contraction of the interlayer separation and not the formation of a collapsed phase. (\u00a9 Wiley\u2010VCH Verlag GmbH &amp; Co. KGaA, 69451 Weinheim, Germany, 2004)<\/jats:p>","DOI":"10.1002\/ejic.200300644","type":"journal-article","created":{"date-parts":[[2004,3,23]],"date-time":"2004-03-23T08:43:15Z","timestamp":1080031395000},"page":"1389-1395","update-policy":"https:\/\/doi.org\/10.1002\/crossmark_policy","source":"Crossref","is-referenced-by-count":31,"title":["Synthesis and Properties of Zn\u2212Al Layered Double Hydroxides Containing Ferrocenecarboxylate Anions"],"prefix":"10.1002","volume":"2004","author":[{"given":"Sandra","family":"Gago","sequence":"first","affiliation":[]},{"given":"Martyn","family":"Pillinger","sequence":"additional","affiliation":[]},{"given":"Teresa\u00a0M.","family":"Santos","sequence":"additional","affiliation":[]},{"given":"Jo\u00e3o","family":"Rocha","sequence":"additional","affiliation":[]},{"given":"Isabel\u00a0S.","family":"Gon\u00e7alves","sequence":"additional","affiliation":[]}],"member":"311","published-online":{"date-parts":[[2004,3,22]]},"reference":[{"key":"e_1_2_6_1_2","unstructured":"Layered Double Hydroxides: Present and Future(Ed.: V. 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T. Kloprogge R. L. Frost inLayered Double Hydroxides: Present and Future(Ed.: V. Rives) Nova Science Publishers Inc. New York 2001 pp. 139\u2212192."},{"key":"e_1_2_6_24_2","doi-asserted-by":"publisher","DOI":"10.1346\/CCMN.1989.0370502"},{"key":"e_1_2_6_25_2","doi-asserted-by":"publisher","DOI":"10.1039\/a903231b"},{"key":"e_1_2_6_26_2","unstructured":"\u00a0"},{"key":"e_1_2_6_27_2","doi-asserted-by":"publisher","DOI":"10.1346\/CCMN.1997.0450111"},{"key":"e_1_2_6_28_2","doi-asserted-by":"publisher","DOI":"10.1021\/cm0010856"},{"key":"e_1_2_6_29_2","doi-asserted-by":"publisher","DOI":"10.1039\/FT9928802233"},{"key":"e_1_2_6_30_2","unstructured":"A referee suggested that the observed collapse of the interlayer distance for Zn2Al\u2212Fc(COO)2upon heating could be due to the removal of water molecules present between the carboxylate groups and the positive charges. Based on the agreement between calculated and experimental interlayer spacings we firmly believe that the collapse is due to a reorientation of guest species (analogous to that reported in the literature for LDHs pillared by terephthalate anions)."},{"key":"e_1_2_6_31_2","doi-asserted-by":"publisher","DOI":"10.1021\/ja00124a023"},{"key":"e_1_2_6_32_2","doi-asserted-by":"publisher","DOI":"10.1006\/jmra.1996.0221"}],"container-title":["European Journal of Inorganic Chemistry"],"original-title":[],"language":"en","link":[{"URL":"https:\/\/api.wiley.com\/onlinelibrary\/tdm\/v1\/articles\/10.1002%2Fejic.200300644","content-type":"unspecified","content-version":"vor","intended-application":"text-mining"},{"URL":"https:\/\/onlinelibrary.wiley.com\/doi\/pdf\/10.1002\/ejic.200300644","content-type":"application\/pdf","content-version":"vor","intended-application":"text-mining"},{"URL":"https:\/\/onlinelibrary.wiley.com\/doi\/full-xml\/10.1002\/ejic.200300644","content-type":"application\/xml","content-version":"vor","intended-application":"text-mining"},{"URL":"https:\/\/chemistry-europe.onlinelibrary.wiley.com\/doi\/pdf\/10.1002\/ejic.200300644","content-type":"unspecified","content-version":"vor","intended-application":"similarity-checking"}],"deposited":{"date-parts":[[2025,10,14]],"date-time":"2025-10-14T06:26:50Z","timestamp":1760423210000},"score":1,"resource":{"primary":{"URL":"https:\/\/chemistry-europe.onlinelibrary.wiley.com\/doi\/10.1002\/ejic.200300644"}},"subtitle":[],"short-title":[],"issued":{"date-parts":[[2004,3,22]]},"references-count":32,"journal-issue":{"issue":"7","published-print":{"date-parts":[[2004,4]]}},"alternative-id":["10.1002\/ejic.200300644"],"URL":"https:\/\/doi.org\/10.1002\/ejic.200300644","archive":["Portico"],"relation":{},"ISSN":["1434-1948","1099-0682"],"issn-type":[{"type":"print","value":"1434-1948"},{"type":"electronic","value":"1099-0682"}],"subject":[],"published":{"date-parts":[[2004,3,22]]},"assertion":[{"value":"2003-09-11","order":0,"name":"received","label":"Received","group":{"name":"publication_history","label":"Publication History"}},{"value":"2004-03-22","order":3,"name":"published","label":"Published","group":{"name":"publication_history","label":"Publication History"}}]}}