Naslov
The cerium(III) coordination polymer with mixed polycarboxylic acids. Preparation of the CeO2 nanoparticles by thermal decomposition of the polymer

Autori
Mohammadinasab, Reza ; Tabatabaee, Masoumeh ; Kukovec, Boris-Marko ; Aghaie, Hossein

Izvornik
Inorganica chimica acta (0020-1693) 405 (2013); 368-373

Vrsta, podvrsta i kategorija rada
Radovi u časopisima, članak, znanstveni

Ključne riječi
coordination polymer; cerium(III); CeO2 nanoparticles; benzene-1; 2; 4; 5-tetracarboxylic acid; pyridine-2; 6-dicarboxylic acid

Sažetak
A treatment of benzene-1, 2, 4, 5-tetracarboxylic acid (H4btc) and pyridine-2, 6-dicarboxylic acid (H2pydc) with Ce(NO3)3 ∙6H2O (in the molar ratio 1:1:2) under hydrothermal conditions led to the formation of a new 1D cerium(III) coordination polymer {; ; ; ; [(pydc)2Ce2(μ-H2btc)(H2O)6] ∙4H2O}; ; ; ; n (1). Compound 1 was characterized by infrared spectroscopy, elemental analyses and by X-ray diffraction studies. The polymeric chain of 1 contains cerium(III) ions bridged by H2btc2‒ ligand. Each H2btc2‒ ion is connected to four cerium(III) ions via its two bidentate and bridging carboxylate groups. Cerium(III) ion is ninecoordinated by three oxygen atoms from two different H2btc2‒ ligands, two oxygen atoms and one nitrogen atom from the tridentate pydc2- ligand and three coordinated water molecules, resulting with a distorted tricapped trigonal prismatic arrangement. Many hydrogen bonds of the O–H...O type are also present in the crystal structure of 1 and assemble the polymeric chains and the co-crystallized water molecules into a 3D architecture. The coordination polymer 1 was used for the preparation of the CeO2 nanoparticles. Synthesized CeO2 nanoparticles were characterized by infrared spectroscopy, powder X-ray diffraction (PXRD) and scanning electron microscopy (SEM). The face-centered cubic structure of CeO2 was determined by PXRD.

Izvorni jezik
Engleski

Znanstvena područja
Kemija

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