Please use this identifier to cite or link to this item:
Title: Thermal and FT-IR studies on the interaction between Cr(NO3)3·9H2O and some diols [articol]
Authors: Barbu, Mirela Ionela
Stoia, Marcela
Ștefănescu, Oana-Elena
Ștefănescu, M.
Subjects: Chimie analitică
Chromium oxide
Issue Date: 2010
Publisher: Timişoara: Editura Politehnica
Citation: Barbu, M.. Thermal and FT-IR studies on the interaction between Cr(NO3)3·9H2O and some diols . Timişoara: Editura Politehnica, 2010
Series/Report no.: Seria chimie şi ingineria mediului, Tom 55(69), fasc. 2 (2010);
Abstract: This paper presents a study regarding the interaction between Cr(NO3)3 and 1,2- propanediol, 1,3-propanediol and 1,4-butanediol, respectively. Previous studies on the reaction between metal nitrates and diols showed that the primary C-OH groups of diols are oxidized by NO3 - to –COO- . The resulted carboxylate anions coordinate to the metal ions forming complexes that can be used as precursors for nanocrystalline metal oxides. The evolution of the redox reaction between Cr(NO3)3 and the diols was studied by thermal analysis and by FT-IR spectrometry. The FT-IR spectra of the obtained reaction products have confirmed the formation of carboxylate coordination compounds of Cr(III) evidenced by υass(–COO- ) at ~1680 cm-1 and ~1560 cm-1 and υs (–COO- ) at ~ 1370 cm-1 . These compounds thermally decompose in the range 250-300°C leading to amorphous nonstoechiometric chromium oxide (Cr2O3+x) which turns into nanocrystalline Cr2O3 oxide above 400°C.
URI: http://localhost:8080/xmlui/handle/123456789/1059
Appears in Collections:Articole stiintifice/Scientific articles

Files in This Item:
File Description SizeFormat 
BUPT_ART_Barbu_f.pdf172.39 kBAdobe PDFView/Open

Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.