Please use this identifier to cite or link to this item: http://hdl.handle.net/1822/5723

TitleEffect of concentration of the diazoalcene molybdenum complex immobilized in ureasil matrix
Author(s)Costa, F.
Fonseca, A. Maurício C.
Silva, Carlos J. R.
Neves, Isabel C.
KeywordsMolydenum (IV) complex
Diazoalcene
Sol-gel
Complex immobilization
Host-guest
molybdenum(IV) complex
Issue dateDec-2004
PublisherKluwer
JournalJournal of Sol-Gel Science and Technology
Citation"Journal of sol-gel science and technology". ISSN 0928-0707. 32:1-3 (Dec. 2004) 353-356.
Abstract(s)The complex trans-[FMo(NNCHCHCHCH2CH3)(Ph2PCH2CH2PPh2)2][BPh4], was dispersed in a hybrid matrix synthesized by a sol-gel process. The host matrix of the so-called ureasil is a network of silica to which oligopolyoxyethylene chains [POE, (OCH2CH2)n] are grafted by means of urea cross-links. The free complex and sol-gel materials were characterized by thermal analysis (DSC), surface analysis (XPS) and spectroscopic methods (FT-IR and UV/Vis). The data gathered indicates that the molybdenum(IV) complex is immobilized in the host matrix, and it exhibits structural properties different from those of the free form. These differences could arise either from distortions caused by steric effects imposed by the structure of hybrid matrix or by interactions with the matrix. These materials shows potential applications in heterogeneous catalysis in mild conditions.
TypeArticle
URIhttp://hdl.handle.net/1822/5723
DOI10.1007/s10971-004-5816-2
ISSN0928-0707
Publisher versionwww.springerlink.com
Peer-Reviewedyes
AccessOpen access
Appears in Collections:CDQuim - Artigos (Papers)

Files in This Item:
File Description SizeFormat 
JSolGelST-32(2004)353.pdf582,95 kBAdobe PDFView/Open

Partilhe no FacebookPartilhe no TwitterPartilhe no DeliciousPartilhe no LinkedInPartilhe no DiggAdicionar ao Google BookmarksPartilhe no MySpacePartilhe no Orkut
Exporte no formato BibTex mendeley Exporte no formato Endnote Adicione ao seu ORCID