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339202

Sigma-Aldrich

Niobium(V) ethoxide

99.95% trace metals basis

Sinonimo/i:

NbOEt, Niobium ethanolate, Niobium ethylate, Niobium pentaethoxide, Pentaethoxyniobium

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About This Item

Formula condensata:
Nb(OCH2CH3)5
Numero CAS:
Peso molecolare:
318.21
Beilstein:
3678883
Numero CE:
Numero MDL:
Codice UNSPSC:
12352103
ID PubChem:
NACRES:
NA.23

Livello qualitativo

Saggio

99.95% trace metals basis

Forma fisica

liquid

Impiego in reazioni chimiche

core: niobium

Indice di rifrazione

n20/D 1.516 (lit.)

P. eboll.

142 °C/0.1 mmHg (lit.)

Punto di fusione

5-6 °C (lit.)

Densità

1.268 g/mL at 25 °C (lit.)

Stringa SMILE

CCO[Nb](OCC)(OCC)(OCC)OCC

InChI

1S/5C2H5O.Nb/c5*1-2-3;/h5*2H2,1H3;/q5*-1;+5
ZTILUDNICMILKJ-UHFFFAOYSA-N

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Descrizione generale

Niobium(V) ethoxide is a metal-organic compound that dimerizes in solution to form Nb2(OEt)10 molecules. At room temperature, it is a colorless liquid that is miscible with some organic solvents, but which hydrolyzes readily. Niobium(V) ethoxide freezes at 5 °C and boils at 142 °C at 0.1 mmHg. It can be synthesized by the electrochemical reaction of ethanol with niobium plate and stainless-steel electrodes in the presence of tetraethylammonium chloride (TEAC) as the conductive additive.

Applicazioni

Niobium(V) ethoxide is a synthetic precursor for niobium oxides, for example Nb2O5 , NaNbO3 , andTiNb2O7. Niobium(V) ethoxide is commonly used in colloidal solution-based syntheses like sol-gel processing and electrospinning. These chemistries allow researchers to control the microstructure to form gels , nanofibers , nanotubes , and microspheres. Niobium(V) ethoxide is also commonly added to other metal alkoxides to dope metal oxides, most commonly titania, with niobium.

Because of its low boiling point and low decomposition temperature (~325-350 °C),niobium(V) ethoxide is also used as a precursor in atomic-layer deposition, chemical vapor deposition, and metal-organic chemical vapor deposition of niobium oxides.

It can also be used as a dopant to prepare Nb-doped TiO2 photoanode for dye-sensitized solar cells (DSSC). The doping of Nb lowers the conduction band of TiO2 enhancing electron injection and transfer ability of TiO2 photoanode. This results in a significant increase in the performance of DSSC.

Caratteristiche e vantaggi

The purity and volatility of Niobium(V) ethoxide makeit a suitable precursor for atomic layer deposition and chemical vapordeposition of niobium oxide.

Pittogrammi

Flame

Avvertenze

Warning

Indicazioni di pericolo

Classi di pericolo

Flam. Liq. 3

Codice della classe di stoccaggio

3 - Flammable liquids

Classe di pericolosità dell'acqua (WGK)

WGK 3

Punto d’infiammabilità (°F)

96.8 °F - closed cup

Punto d’infiammabilità (°C)

36 °C - closed cup

Dispositivi di protezione individuale

Faceshields, Gloves, Goggles, type ABEK (EN14387) respirator filter


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