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Sigma-Aldrich

Niobium(V) ethoxide

99.95% trace metals basis

Synonyme(s) :

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

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About This Item

Formule linéaire :
Nb(OCH2CH3)5
Numéro CAS:
3236-82-6
Poids moléculaire :
318.21
Numéro Beilstein :
3678883
Numéro CE :
221-795-2
Numéro MDL:
MFCD00015122
Code UNSPSC :
12352103
ID de substance PubChem :
24860621
Nomenclature NACRES :
NA.23

Niveau de qualité

100

Pureté

99.95% trace metals basis

Forme

liquid

Pertinence de la réaction

core: niobium

Indice de réfraction

n20/D 1.516 (lit.)

Point d'ébullition

142 °C/0.1 mmHg (lit.)

Pf

5-6 °C (lit.)

Densité

1.268 g/mL at 25 °C (lit.)

Chaîne SMILES 

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

InChI

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

Clé InChI

ZTILUDNICMILKJ-UHFFFAOYSA-N

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Description générale

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.

Application

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.

Caractéristiques et avantages

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

Pictogrammes

Flame
GHS02

Mention d'avertissement

Warning

Mentions de danger

H226

Classification des risques

Flam. Liq. 3

Code de la classe de stockage

3 - Flammable liquids

Classe de danger pour l'eau (WGK)

WGK 3

Point d'éclair (°F)

96.8 °F - closed cup

Point d'éclair (°C)

36 °C - closed cup

Équipement de protection individuelle

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

Certificats d'analyse (COA)

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Consulter la Bibliothèque de documents

European Materials Research Society Monographs, 5, 93-100 (1992)
Porosity-Controlled TiNb2O7 Microspheres with Partial Nitridation as A Practical Negative Electrode for High-Power Lithium-Ion Batteries.
Park H, et al.
Advanced Energy Materials, 5, 1401945-1401945 (2015)
TiNb2O7 hollow nanofiber anode with superior electrochemical performance in rechargeable lithium ion batteries.
Yu H, et al.
Nano Energy, 38, 109-117 (2017)
Sol?gel synthesis and characterization of Nb2O5 powders.
Ristic M, et al.
Materials Letters, 58, 2658-2663 (2004)
Yujing Liu et al.
ACS nano, 4(9), 5373-5381 (2010-08-26)
Crystalline niobium-doped titania nanoparticles were synthesized via solvothermal procedures using tert-butyl alcohol as a novel reaction medium, and their assembly into mesoporous films was investigated. The solvothermal procedure enables the preparation of crystalline doped and undoped nonagglomerated titania nanoparticles, whose
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