{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2025,9,23]],"date-time":"2025-09-23T14:06:52Z","timestamp":1758636412226},"reference-count":0,"publisher":"Walter de Gruyter GmbH","issue":"3","license":[{"start":{"date-parts":[[2005,9,1]],"date-time":"2005-09-01T00:00:00Z","timestamp":1125532800000},"content-version":"unspecified","delay-in-days":0,"URL":"http:\/\/creativecommons.org\/licenses\/by-nc-nd\/3.0\/"}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":[],"published-print":{"date-parts":[[2005,9,1]]},"abstract":"<jats:title>Abstract<\/jats:title>\n               <jats:p>This work investigates the influence of the precursor trimethylsilil isocyanate on the sol-gel synthesis of hybrid materials. The obtained Si\u2212O\u2212C\u2212N network is additionally modified by titanium and zirconium alcoxypropoxides in the range of 10 to 30 wt. %. The structure of the obtained hybrid materials before and after pyrolysis up to 1100\u00b0C was investigated by methods of XRD, FTIR and 29Si MAS NMR. We established that the hybrid structure was stable up to 600\u00b0C based on IR study. The structural transformation of the hybrid materials into oxycarbonitrogen system started at 800\u00b0C. The network of the hybrids modified by titanium remained stable and amorphous up to the final temperature of the pyrolysis (1100\u00b0C) compared to the gels modified by more than 10 wt.% Zr. It was confirmed by XRD analysis that the last mentioned are nanocomposite materials, built from carbooxynitrogen vitreous matrix and ZrO2-nanocrystals (tetragonal). The NMR method verified the presence of heterometallic bonds (Si\u2212O\u2212Ti and Si\u2212O\u2212Zr) and Q4, ZrQ3 or TiQ3, NSiO3 and D structural units in the gels.<\/jats:p>","DOI":"10.2478\/bf02479275","type":"journal-article","created":{"date-parts":[[2006,8,10]],"date-time":"2006-08-10T09:27:24Z","timestamp":1155202044000},"page":"452-469","source":"Crossref","is-referenced-by-count":2,"title":["Organic-inorganic hybrid materials based on N=C=O functionalised silan modified with titanium and zirconium"],"prefix":"10.2478","volume":"3","author":[{"given":"Yordanka","family":"Ivanova","sequence":"first","affiliation":[{"name":"Department of Silicate Technology, University of Chemical Technology and Metallurgy, 1756, Sofia, Bulgaria"}]},{"given":"Yanko","family":"Dimitriev","sequence":"additional","affiliation":[{"name":"Department of Silicate Technology, University of Chemical Technology and Metallurgy, 1756, Sofia, Bulgaria"}]},{"given":"Tsvetelina","family":"Gerganova","sequence":"additional","affiliation":[{"name":"Department of Silicate Technology, University of Chemical Technology and Metallurgy, 1756, Sofia, Bulgaria"}]},{"given":"Raina","family":"Bryaskova","sequence":"additional","affiliation":[{"name":"Department of Silicate Technology, University of Chemical Technology and Metallurgy, 1756, Sofia, Bulgaria"}]},{"given":"Maria","family":"Fernandes","sequence":"additional","affiliation":[{"name":"Department of Ceramics and Glass Engineering, Aveiro University, 3810-193, Aveiro, Portugal"}]},{"given":"Isabel","family":"Miranda Salvado","sequence":"additional","affiliation":[{"name":"Department of Ceramics and Glass Engineering, Aveiro University, 3810-193, Aveiro, Portugal"}]}],"member":"374","published-online":{"date-parts":[[2005,9,1]]},"container-title":["Open Chemistry"],"original-title":[],"language":"en","link":[{"URL":"http:\/\/link.springer.com\/content\/pdf\/10.2478\/BF02479275.pdf","content-type":"application\/pdf","content-version":"vor","intended-application":"text-mining"},{"URL":"https:\/\/www.degruyter.com\/view\/journals\/chem\/3\/3\/article-p452.xml","content-type":"text\/html","content-version":"vor","intended-application":"text-mining"},{"URL":"https:\/\/www.degruyter.com\/document\/doi\/10.2478\/BF02479275\/xml","content-type":"application\/xml","content-version":"vor","intended-application":"text-mining"},{"URL":"https:\/\/www.degruyter.com\/document\/doi\/10.2478\/BF02479275\/pdf","content-type":"unspecified","content-version":"vor","intended-application":"similarity-checking"}],"deposited":{"date-parts":[[2022,4,27]],"date-time":"2022-04-27T10:10:34Z","timestamp":1651054234000},"score":1,"resource":{"primary":{"URL":"https:\/\/www.degruyter.com\/document\/doi\/10.2478\/BF02479275\/html"}},"subtitle":[],"short-title":[],"issued":{"date-parts":[[2005,9,1]]},"references-count":0,"journal-issue":{"issue":"3","published-online":{"date-parts":[[2005,9,1]]},"published-print":{"date-parts":[[2005,9,1]]}},"alternative-id":["10.2478\/BF02479275"],"URL":"https:\/\/doi.org\/10.2478\/bf02479275","relation":{},"ISSN":["2391-5420"],"issn-type":[{"value":"2391-5420","type":"electronic"}],"subject":[],"published":{"date-parts":[[2005,9,1]]}}}