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Sigma-Aldrich

Silicomolybdic acid solution

Synonym(s):

Keggin heteropoly acid

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About This Item

Linear Formula:
H4SiO4 · 12MoO3
CAS Number:
11089-20-6
MDL number:
MFCD00054151
UNSPSC Code:
12352301
PubChem Substance ID:
329762788
NACRES:
NA.22

form

liquid

refractive index

n20/D 1.376

density

1.156 g/mL at 25 °C

SMILES string

O[Mo](=O)(=O)O[Mo](=O)(=O)O[Mo](=O)(=O)O[Si](O[Mo](=O)(=O)O[Mo](=O)(=O)O[Mo](O)(=O)=O)(O[Mo](=O)(=O)O[Mo](=O)(=O)O[Mo](O)(=O)=O)O[Mo](=O)(=O)O[Mo](=O)(=O)O[Mo](O)(=O)=O

InChI

1S/12Mo.O4Si.4H2O.32O/c;;;;;;;;;;;;1-5(2,3)4;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;/h;;;;;;;;;;;;;4*1H2;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;/q;;;;8*+1;-4;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;/p-4

InChI key

LMAWUDMBHTZUCF-UHFFFAOYSA-J

Application

Reactant for:
  • Use in electrostatic synthesis of compounds comprising ultrathin layers of silicododecamolybdate anions and poly(allyl ammonium) cations
  • Preparation of charge transfer compounds with Keggin anions and 2,2′-biquinolinium
Silicomolybdic acid (Keggin Acid, SMA) can be used to prepare supported acid catalysts for various organic transformations. For example, it is used to prepare:
  • SMA immobilized on mesoporous silica spheres for hydrolysis of ammonia borane.
  • SMA doped carbon-ceramic composite electrodes for electrocatalytic reduction of bromate.
  • SMA supported on silica gel (SiO2) for Hosomi–Sakurai allylation of carbonyl compounds.
  • SMA supported on mesoporous SiO2 hollow spheres for Friedel–Crafts alkylation reaction.

Pictograms

Exclamation mark
GHS07

Signal Word

Warning

Hazard Statements

H315,H319,H335

Hazard Classifications

Eye Irrit. 2 - Skin Irrit. 2 - STOT SE 3

Target Organs

Respiratory system

Storage Class Code

12 - Non Combustible Liquids

WGK

WGK 3

Flash Point(F)

Not applicable

Flash Point(C)

Not applicable

Certificates of Analysis (COA)

Search for Certificates of Analysis (COA) by entering the products Lot/Batch Number. Lot and Batch Numbers can be found on a product’s label following the words ‘Lot’ or ‘Batch’.

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Preparation of hollow mesoporous silica spheres with immobilized silicomolybdic acid and their catalytic activity for the hydrolytic dehydrogenation of ammonia borane
Umegaki T, et al.
Microporous and Mesoporous Materials : The Official Journal of the International Zeolite Association, 223, 152-156 (2016)
Sol-gel-derived carbon ceramic composite electrodes bulk-modified with 1: 12-silicomolybdic acid
Wang P, et al.
New. J. Chem., 24(7), 481-483 (2000)
Silicomolybdic acid supported on silica gel: an efficient catalyst for Hosomi-Sakurai reactions
Murugan K, et al.
Tetrahedron, 67(31), 5621-5629 (2011)
Jian Dou et al.
Journal of the American Chemical Society, 134(39), 16235-16246 (2012-09-07)
Herein we report an inside-out preinstallation-infusion-hydration method for targeted synthesis of Keggin heteropoly acids (silicomolybdic acid, H(4)SiMo(12)O(40)) within mesoporous silica (SiO(2)) hollow spheres. In this process, discrete molybdenum dioxide (MoO(2)) nanoparticles with diameter size ranging from 25 to 60 nm

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