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In other related hybrid materials, one tries to explore properties that result from combining the silica network with organic moieties, such as in the covalent grafting of polysaccharides onto amorphous nanosilicas. However, sol\u2013gel routes for modification with TM have been less explored for hybrid siliceous materials. The present study demonstrates the effective modification of hybrid siliceous materials with TM (TM\u2009=\u2009Co<jats:sup>2+<\/jats:sup>, Ni<jats:sup>2+<\/jats:sup>, Cu<jats:sup>2+<\/jats:sup>, Zn<jats:sup>2+<\/jats:sup>) that result from a sol\u2013gel method that uses as a precursor the polysaccharide \u03ba-carrageenan that was modified with a covalently alkoxysilane linked. Structural analysis and characterization studies of the derived carrageenan-silica hybrids were undertaken, and, in particular, the effects of the TM ions on the hybrids\u2019 properties have been assessed. This work clearly indicates that the modification with TM imposes changes on the morphological, optical, and thermal properties of the hybrids compared to the unmodified analogs. Hence, the practical applicability of the modification with TM using the sol\u2013gel described here is not limited to the presence of the guest ion but also provides a tool for changing the properties of the host particles.<\/jats:p>\n                <jats:p><jats:bold>Graphical Abstract<\/jats:bold><\/jats:p>","DOI":"10.1007\/s10971-023-06112-y","type":"journal-article","created":{"date-parts":[[2023,4,29]],"date-time":"2023-04-29T02:01:46Z","timestamp":1682733706000},"page":"201-214","update-policy":"https:\/\/doi.org\/10.1007\/springer_crossmark_policy","source":"Crossref","is-referenced-by-count":10,"title":["Transition metal-modification of carrageenan-silica hybrids by a sol\u2013gel method"],"prefix":"10.1007","volume":"107","author":[{"ORCID":"https:\/\/orcid.org\/0000-0003-3172-5437","authenticated-orcid":false,"given":"Sofia F.","family":"Soares","sequence":"first","affiliation":[]},{"given":"Ana L.","family":"Daniel-da-Silva","sequence":"additional","affiliation":[]},{"given":"Tito","family":"Trindade","sequence":"additional","affiliation":[]}],"member":"297","published-online":{"date-parts":[[2023,4,29]]},"reference":[{"key":"6112_CR1","doi-asserted-by":"publisher","DOI":"10.1038\/s41529-021-00190-5","volume":"5","author":"S Gin","year":"2021","unstructured":"Gin S, Delaye J-M, Angeli F, Schuller S (2021) Aqueous alteration of silicate glass: state of knowledge and perspectives. 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