CAS 14040-11-0 Tungsten hexacarbonyl - Analytical Products / Alfa Chemistry

CAT	AP14040110
CAS	14040-11-0
Structure
MDL Number	MFCD00011462
Molecular Weight	351.90
EC Number	237-880-2
InChI Key	FQNHWXHRAUXLFU-UHFFFAOYSA-N

Linear Formula

W(CO)6

Dirac-Fock-Breit-Gaunt Calculations for Tungsten Hexacarbonyl W(CO)6

Gulzari L Malli

J Chem Phys. 2016 May 21;144(19):194301.

PMID: 27208943

Electron Induced Reactions of Surface Adsorbed Tungsten Hexacarbonyl (W(CO)6)

Samantha G Rosenberg, Michael Barclay, D Howard Fairbrother

Phys Chem Chem Phys. 2013 Mar 21;15(11):4002-15.

PMID: 23400276

Fragmentation Pathways of Tungsten Hexacarbonyl Clusters Upon Electron Ionization

M Neustetter, E Jabbour Al Maalouf, P Limão-Vieira, S Denifl

J Chem Phys. 2016 Aug 7;145(5):054301.

PMID: 27497555

Monitoring Photochemical Reaction Pathways of Tungsten Hexacarbonyl in Solution From Femtoseconds to Minutes

Liangdong Zhu, Sumit Saha, Yanli Wang, Douglas A Keszler, Chong Fang

J Phys Chem B. 2016 Dec 29;120(51):13161-13168.

PMID: 27976573

Pandora's Box of Binary Tungsten Iodides

Markus Ströbele, Hans-Jürgen Meyer

Dalton Trans. 2019 Feb 7;48(5):1547-1561.

PMID: 30574976

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Case Study

Growth of Nickel Nanorods and Nanocubes Induced by Tungsten Hexacarbonyl

Xiao, Lang, et al. Materials Letters 229 (2018): 340-343.

The control of the morphology and size of metal nanocrystals has been an intriguing research topic in nanoscience and technology, as metal nanocrystals exhibit significant shape and size effects in various applications such as catalysis, magneto-optics, and biomedicine. Studies have reported that nickel (Ni) nanocrystals with rod and cubic shapes can be prepared in an organic solution at a relatively low reaction temperature of 150 °C with the help of hexacarbonyl tungsten (W(CO)₆).
Synthesis: In a typical synthesis of Ni nanorods, 1 mmol of Ni(acac)₂ is dissolved in 7 mL of oleylamine and pre-treated under vacuum at 120 °C for 1 hour. The solution is then degassed under argon at 60 °C for 20 minutes, followed by the addition of 0.035 mmol of W(CO)₆. The solution is continuously heated to 150 °C at an average heating rate of 4-5 °C/min for 30 minutes. After cooling to room temperature, the solution is washed twice with hexane and ethanol and separated by centrifugation. Finally, the product is dried under vacuum to obtain Ni powder. For the synthesis of Ni nanocubes, the concentration of W(CO)₆ is reduced to 0.025 mmol, while the other steps remain the same as those for the nanorods synthesis.

Preparation of Composite Nafion Membranes with Nanoscale Tungsten Oxide Using Tungsten Hexacarbonyl

Sizov, Victor E., et al. Journal of Membrane Science 609 (2020): 118244.

Commercial Nafion 112 (hereinafter referred to as Nafion) is used as a raw perfluorosulfonic acid ion exchange membrane. Hexacarbonyl tungsten serves as a precursor for tungsten nanoparticles. H₂SO₄ and deionized water are used to prepare the electrolyte. Vanadium (IV) oxide hydrate is utilized for electrolyte preparation. Oxygen and carbon dioxide are employed to synthesize the inorganic phase.
The iNafion sample type is prepared from the initial raw Nafion, following a typical pretreatment procedure: exposure to 3% H₂O₂ at 70 °C for 1 hour, followed by exposure to 0.5 M sulfuric acid (SA) at 70 °C for 30 minutes, and finally, exposure to deionized water at room temperature for 1 hour.
The preparation method for the modified Nafion (mNafion sample type) is as follows: First, Nafion is pretreated in the same manner as iNafion. After that, the membrane is wiped with a paper towel and placed in a high-pressure reactor along with 200 mg of hexacarbonyl tungsten. The reactor is sealed and filled with 1 bar of oxygen. The high-pressure reactor is then heated to 45 °C, and 140 bar of carbon dioxide is pumped into it. The system is exposed to 120 °C (435 bar pressure) for 48 hours, after which the pressure in the high-pressure reactor is slowly released, allowing it to cool to 45 °C before opening.

Generalized Synthesis of Uniform Metal Nanoparticles Assisted by Tungsten Hexacarbonyl

Zhao, Xixia, et al. Chemistry of Materials 31.12 (2019): 4325-4329.

This study develops a universal strategy for controlling the synthesis of ten types of monodisperse metals by using hexacarbonyl tungsten W(CO)₆ to assist in the reduction of various metal salts in organic phase solutions. By adjusting the reaction parameters, the size of these metal nanoparticles can be easily controlled without the need for size selection.
The W(CO)₆ assisted reaction process should proceed according to the following steps:
(i) Decomposition of W(CO)₆: Before the reduction of metal salts, W(CO)₆ rapidly decomposes at high temperatures (>140 °C) to generate CO and W⁰ species.
(ii) Reduction of Metal Salts: With the assistance of CO, W⁰ species, and oleylamine (OAm), metal salts in a positive oxidation state (Mⁿ⁺, n = 1-3) are reduced to zero-valent metals (M⁰).
(iii) Formation and Decomposition of Metal Carbonyl Compounds (Mx(CO)y): Metal carbonyl compounds are formed through the coordination of CO with the metal, which tend to decompose at appropriate temperatures.
(iv) Formation of Uniform Metal Nanoparticles: Metal nanoparticles continue to grow in the presence of CO and other ligands, allowing for the regulation of their morphology and size.