Naslov
Nonaqueous Synthesis of a new Compound: Vanadium Oxide Hydrate V7.2O16 4.2H2O

Autori
Djerdj, Igor ; Niederberger, Markus

Vrsta, podvrsta i kategorija rada
Sažeci sa skupova, sažetak, znanstveni

Izvornik
Abstracts of papers of the 234th ACS National Meetings & Expositions / - , 2007

Skup
234th ACS National Meetings & Expositions

Mjesto i datum
Boston (MA), Sjedinjene Američke Države, 19.08.2007. - 23.08.2007

Vrsta sudjelovanja
Predavanje

Vrsta recenzije
Međunarodna recenzija

Ključne riječi
strongly correlated system; nonaquesous synthesis; self-doping

Sažetak
Stoichiometric VO2 has been found broad application due to its large reversible change of electric, magnetic and optical properties at around 340 K. This metal-insulator transition is accompanied by a structural transition from a rutile to a monoclinic phase. We present a new phase of nonstoichiometric VO2 synthesized by nonaqueous sol-gel route starting from VCl4 and using benzyl alcohol as a reaction media. The resulting powder consists of well-dispersed single-crystalline nanorods grown along [010] direction of tetragonal V7.2O16of papers 4.2H2O with lattice parameters a = 10.427(2) Å c = 3.009(1) Å space group I4/m (87). In terms of coordination polyhedra, each V cation is coordinated with 6 oxygen atoms forming highly distorted octahedra. The structure posses large channels along c-axis (around 5 Å in diameter), which are large enough for accommodation of crystalline water. Ab initio electron density functional theory calculations revealed that investigated V7.2O16 4.2H2O compound has narrow energy gap of 1.16 eV making it suitable in optical application.

Izvorni jezik
Engleski

Znanstvena područja
Fizika

POVEZANOST RADA