{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2025,10,14]],"date-time":"2025-10-14T11:10:13Z","timestamp":1760440213286,"version":"3.32.0"},"reference-count":0,"publisher":"International Union of Crystallography (IUCr)","issue":"3","license":[{"start":{"date-parts":[[2003,4,16]],"date-time":"2003-04-16T00:00:00Z","timestamp":1050451200000},"content-version":"vor","delay-in-days":0,"URL":"http:\/\/journals.iucr.org\/services\/copyrightpolicy.html"},{"start":{"date-parts":[[2003,4,16]],"date-time":"2003-04-16T00:00:00Z","timestamp":1050451200000},"content-version":"tdm","delay-in-days":0,"URL":"http:\/\/journals.iucr.org\/services\/copyrightpolicy.html#TDM"}],"content-domain":{"domain":["iucr.org","wiley.com","iucrj.org"],"crossmark-restriction":true},"short-container-title":["J Appl Crystallogr","J Appl Cryst"],"accepted":{"date-parts":[[2003,1,3]]},"published-print":{"date-parts":[[2003,6,1]]},"abstract":"<jats:p>The local and medium-range structures of siloxane-POE hybrids doped with Fe(III) ions and prepared by the sol-gel process were investigated by X-ray absorption near-edge structure (XANES)\/extended X-ray absorption fine structure (EXAFS) and small-angle X-ray scattering (SAXS), respectively. The experimental results show that the structure of these composites depends on the doping level. EXAFS data reveal that, for low doping levels ([O]\/[Fe] &gt; 40, oxygens being of the ether-type of the POE chains), Fe(III) ions are surrounded essentially by a shell of chlorine atoms, suggesting the formation of FeCl<jats:sub>4<\/jats:sub>\n                  <jats:sup>-<\/jats:sup> anions. At high doping levels ([O]\/[Fe] &lt; 20), Fe(III) ions interacts mainly with oxygen atoms and form FeO<jats:sub>x <\/jats:sub>species. The relative proportion of FeO<jats:sub>x<\/jats:sub> species increases with iron concentration, this result being consistent with the results of SAXS measurements showing that increasing iron doping induces the formation of iron-rich nanodomains embedded in the polymer matrix.<\/jats:p>","DOI":"10.1107\/s0021889803000517","type":"journal-article","created":{"date-parts":[[2003,4,22]],"date-time":"2003-04-22T14:40:09Z","timestamp":1051022409000},"page":"405-409","update-policy":"https:\/\/doi.org\/10.1107\/cm_01","source":"Crossref","is-referenced-by-count":9,"special_numbering":"1","title":["Small-angle X-ray scattering and X-ray absorption near-edge structure study of iron-doped siloxane-polyoxyethylene nanocomposites"],"prefix":"10.1107","volume":"36","author":[{"given":"L.A","family":"Chiavacci","sequence":"first","affiliation":[]},{"given":"K","family":"Dahmouche","sequence":"additional","affiliation":[]},{"given":"C.V","family":"Santilli","sequence":"additional","affiliation":[]},{"given":"V","family":"de Zea Bermudez","sequence":"additional","affiliation":[]},{"given":"L.D","family":"Carlos","sequence":"additional","affiliation":[]},{"given":"V","family":"Briois","sequence":"additional","affiliation":[]},{"given":"A.F","family":"Craievich","sequence":"additional","affiliation":[]}],"member":"329","published-online":{"date-parts":[[2003,4,16]]},"container-title":["Journal of Applied Crystallography"],"original-title":[],"link":[{"URL":"http:\/\/journals.iucr.org\/j\/issues\/2003\/03\/01\/ks7221\/ks7221.pdf","content-type":"unspecified","content-version":"vor","intended-application":"text-mining"},{"URL":"http:\/\/journals.iucr.org\/j\/issues\/2003\/03\/01\/ks7221\/ks7221.pdf","content-type":"unspecified","content-version":"vor","intended-application":"similarity-checking"}],"deposited":{"date-parts":[[2025,1,11]],"date-time":"2025-01-11T12:41:25Z","timestamp":1736599285000},"score":1,"resource":{"primary":{"URL":"https:\/\/journals.iucr.org\/paper?S0021889803000517"}},"subtitle":[],"short-title":[],"issued":{"date-parts":[[2003,4,16]]},"references-count":0,"journal-issue":{"issue":"3","published-print":{"date-parts":[[2003,6]]}},"alternative-id":["S0021889803000517"],"URL":"https:\/\/doi.org\/10.1107\/s0021889803000517","relation":{},"ISSN":["0021-8898"],"issn-type":[{"type":"print","value":"0021-8898"}],"subject":[],"published":{"date-parts":[[2003,4,16]]},"assertion":[{"value":"Journal of Applied Crystallography","order":0,"name":"journal","label":"Publication","explanation":{"URL":"http:\/\/journals.iucr.org\/j"},"group":{"name":"general","label":"General"}},{"value":"research papers","order":1,"name":"content_type","label":"Content type","explanation":{"URL":"https:\/\/journals.iucr.org\/j\/services\/notesforauthors.html"},"group":{"name":"general","label":"General"}},{"value":"Available","URL":"https:\/\/scripts.iucr.org\/cgi-bin\/citedin?ks7221","order":2,"name":"article_metrics","label":"Article metrics","group":{"name":"general","label":"General"}},{"value":"Yes","order":0,"name":"peer_reviewed","label":"Peer reviewed","group":{"name":"peer_review","label":"Peer review"}},{"value":"Single blind","order":1,"name":"review_process","label":"Review process","group":{"name":"peer_review","label":"Peer review"}},{"value":"29 August 2002","order":0,"name":"received","label":"Received","group":{"name":"publication_history","label":"Publication history"}},{"value":"3 January 2003","order":1,"name":"accepted","label":"Accepted","group":{"name":"publication_history","label":"Publication history"}},{"value":"16 April 2003","order":2,"name":"published_online","label":"Published online","group":{"name":"publication_history","label":"Publication history"}},{"value":"\u00a9 2003 International Union of Crystallography","order":0,"name":"copyright","label":"Copyright","explanation":{"URL":"http:\/\/journals.iucr.org\/services\/copyrightpolicy.html"},"group":{"name":"copyright_and_licensing","label":"Copyright and licencing"}}]}}