Molybdenyl Acetylacetonate CAS 17524-05-9

1.1 Oxidation Reaction Catalysis
Molybdenum acetylacetonate is an efficient catalyst for the epoxidation of olefins. In the presence of tert butyl hydroperoxide (TBHP), it can catalyze the conversion of styrene to epichlorohydrin with a selectivity of over 95%. The catalytic mechanism involves the reaction of Mo (IV) with peroxides to generate highly active intermediate Mo (V)=O, which is selectively oxidized through oxygen transfer.

1.4 Aggregation Reaction Regulation
In olefin coordination polymerization, the catalyst system composed of Mo (acac) ₂ and methylaluminoxane (MAO) can control the branching degree of polyethylene. By adjusting the Al/Mo ratio, the transition from high-density polyethylene (HDPE) to low-density polyethylene (LDPE) can be achieved.

1.2 Carbon carbon coupling reaction
As a metal transfer reagent, Mo (acac) ₂ can participate in Kumada coupling reaction. Under the synergistic effect of Ni (acac) ₂, catalytic cross coupling of aryl Grignard reagents with halogenated aromatic hydrocarbons is carried out to construct biphenyl structures. This system exhibits excellent compatibility with steric hindrance sensitive substrates.

1.3 Asymmetric catalysis
Chiral molybdenum complexes can be formed through chiral ligand modification, such as naphthol phosphate. In asymmetric Diels Alder reactions, cyclopentadiene reacts with acrolein derivatives to obtain chiral products with ee values greater than 90%. Its stereocontrol stems from ligand induced spatial hindrance differences in transition states.

2.1 Metal oxide nanomaterials
Thermal decomposition of MoO ₂ (acac) ₂ is an effective method for preparing monodisperse MoO ∝ nanoparticles. By pyrolysis in oleylamine at 280 ℃, MoO3 quantum dots with a particle size of 5-8 nm and a bandgap width of 2.8 eV can be obtained, which are suitable for photocatalytic hydrogen production.

2.2 Construction of Metal Organic Frameworks (MOFs)
As a metal node, Mo (acac) ₂ can self assemble with carboxylic acid ligands (such as terephthalic acid) to form stable MOF structures. The obtained material (such as MIL-100 (Mo)) has a 3.1 nm mesoporous channel and a specific surface area of 2200 m ²/g, which can be used for gas storage and separation.

2.3 Electrochromic film
The smart window coating prepared by compounding Mo (acac) ₂ and TiO ₂ with the sol gel method can achieve a reversible transition from transparent (75% transmittance) to dark blue (8% transmittance) at ± 1.5 V, with a response time of<0.5 s and a cycle life of more than 10 ∨ times.

2.4 Doping of Magnetic Materials
Introducing 5% Mo (acac) ₂ into the synthesis of CoFe ₂ O ₄ nanoparticles can significantly enhance the saturation magnetization (from 72 emu/g to 89 emu/g) while maintaining superparamagnetism, making it suitable for high-density magnetic storage media.

3.1 Positive electrode materials for lithium-ion batteries
Mo (acac) ₂ is used as a molybdenum source to participate in the synthesis of Li ₂ MoO3/carbon composite positive electrode. At a current density of 100 mA/g, the reversible capacity of this material reaches 235 mAh/g, and the capacity retention rate after 500 cycles is 82%, which is superior to the traditional LiCoO ₂ system.

3.2 Fuel Cell Catalysts
The Pt MoO3/C catalyst prepared by impregnation method (Mo derived from Mo (acac) ₂ pyrolysis) showed a mass activity of 2.1 A/mg-Pt for methanol oxidation reaction, which was four times higher than that of pure Pt/C, attributed to the oxidation promoting effect of Molybdenyl acetylacetonate on CO intermediate.

3.3 Photocatalytic water splitting
Load Mo (acac) ₂ onto the surface of g-C ∝ N ₄ nanosheets to construct a Z-type heterojunction. Under AM 1.5G illumination, the hydrogen production rate reached 8.7 mmol/h/g, with a quantum efficiency of 12.6%. Mo (IV) acted as an electronic medium to accelerate interface charge separation.

3.4 supercapacitor electrodes
The MoO3 PANI composite electrode prepared by electrochemical deposition method (Mo source is Mo (acac) ₂) has a specific capacitance of 1245 F/g, energy density of 42 Wh/kg, power density of 18 kW/kg, and better cycling stability than pure PANI at a current density of 1 A/g.

4.1 Tumor photothermal therapy
MoO3 PEG nanosheets (synthesized by Mo (acac) ₂ hydrothermal synthesis) exhibit strong absorption in the near-infrared region (808 nm) and a photothermal conversion efficiency of 43.2%. In vivo experiments have shown that under 1.0 W/cm ² laser irradiation, the temperature at the tumor site rises to 55 ℃, effectively inhibiting tumor growth.

4.2 Biological Imaging Contrast Agents
Co doping Mo (acac) ₂ and Gd ³ ⁺ into mesoporous silica nanoparticles to construct a dual-mode MRI/CT contrast agent. Its longitudinal relaxation rate r ₁=6.8 mM ⁻¹· s ⁻¹, CT value 128 HU, achieving high-resolution imaging of the tumor area.

4.3 Drug delivery system
PH responsive nanocarrier based on Mo (acac) ₂, loaded with doxorubicin through ligand exchange. Under the tumor microenvironment (pH 6.5), the drug release rate reached 82% within 48 hours, which is 3.1 times higher than under physiological pH conditions (pH 7.4).

4.4 Antibacterial materials
The wound dressing prepared by combining Mo (acac) ₂ with chitosan showed inhibition zone diameters of 18 mm and 15 mm against Staphylococcus aureus and Escherichia coli, respectively. Its antibacterial mechanism involves the oxidative damage of Mo (VI) to bacterial cell wall proteins.

5.1 Industrial wastewater treatment
The degradation rate constant of methylene blue (MB) by Mo (acac) - loaded TiO ₂ nanotube array under visible light is 0.042 min ⁻¹, which is 8.4 times that of pure TiO ₂. Mo (IV) acts as an electron trap to suppress carrier recombination and enhance photocatalytic efficiency.

5.2 Electrochemical Reduction of CO ₂
Electrodeposition of MoO ≮ nanoflakes (Mo source is Mo (acac) ₂) on Cu foam to build an efficient CO ₂ reduction catalyst. At -0.8 V vs RHE, the CO Faraday efficiency reached 89%, with a partial current density of 12.5 mA/cm ², which is superior to pure Cu catalyst.

5.3 Heavy Metal Adsorbents
Amino functionalized MoS ₂ nanoflowers prepared using Mo (acac) ₂ as a precursor have a maximum adsorption capacity of 389 mg/g for Hg ² ⁺. The adsorption process follows the Langmuir model and can be regenerated in EDTA solution.

5.4 Degradation of volatile organic compounds (VOCs)
The plasma synergistic MoO3/Al ₂ O3 catalyst (Mo source is Mo (acac) ₂) achieves a decomposition rate of 95% for toluene at room temperature and pressure, with an energy efficiency of 3.2 g/kWh, which is superior to plasma treatment alone.

6.1 Field Effect Transistor (FET)
FET devices based on MoO3 nanoribbons (prepared by Mo (acac) ₂ chemical vapor deposition method), with a mobility of 0.8 cm ²/V · s, a switching ratio of 10 ⁶, and a sub threshold swing of 0.9 V/dec, are suitable for low-power flexible electronics.
6.2 Gas Sensor
The detection limit of SnO ₂ - MoO3 composite nanofibers (Mo content 5 at%) for NO ₂ is 50 ppb, response time<3 s, recovery time<10 s, working temperature 200 ℃, which is 100 ℃ lower than pure SnO ₂.

6.3 Electrochemical sensors
The glassy carbon electrode modified with Mo (acac) ₂ exhibits an oxidation peak potential difference of 210 mV for dopamine (DA) and uric acid (UA), with a linear detection range of 0.5-500 μ M and a sensitivity of 0.24 μ A/μ M. It is suitable for biological fluid analysis.
6.4 Memristor Materials
The TiO ₂/MoO3 multilayer memristor prepared by atomic layer deposition exhibits stable bipolar resistance switching characteristics, with a switching ratio>10 ³ and a holding time exceeding 10 ⁴ s. It has potential applications in neural morphology calculations.

7.1 Self cleaning coating
Molybdenyl acetylacetonate was doped into SiO ₂ - TiO ₂ composite coating, endowing it with dual functions of superhydrophobicity (contact angle 155 °) and photocatalysis. Under ultraviolet light, 92% of organic pollutants on the surface can be decomposed within 3 hours.
7.2 Corrosion resistant coating
The CeO ₂ - MoO3 nano coating (Mo source is Mo (acac) ₂) prepared on the surface of aluminum alloy showed a corrosion area of less than 0.5% after 1000 hours of salt spray testing, which is 80% lower than that of pure CeO ₂ coating.

7.3 Thermal Barrier Coatings
Adding 2 wt% MoO3 (thermally decomposed from Mo (acac) ₂) to YSZ (yttria stabilized zirconia) reduced the thermal conductivity from 2.8 W/m · K to 2.2 W/m · K, and increased the thermal cycle life by 40% at 1200 ℃.
7.4 Anti reflective coating
The MoO3/SiO ₂ multilayer film prepared by spin coating method (Mo source is Mo (acac) ₂) has an average reflectivity of<1% in the wavelength range of 400-800 nm, which is suitable for surface anti reflection of solar cells.

8.1 Photochromic Glass
Doping 0.5 mol% Mo (acac) ₂ into borosilicate glass, after UV irradiation, the visible light transmittance decreases by 35%, and the fading time can be adjusted (from several hours to several days), making it suitable for intelligent shading systems.
8.2 Infrared Radiation Materials
The bismuth molybdate ceramic prepared by co melting Mo (acac) ₂ and Bi ₂ O3 has an emissivity>0.92 in the 8-14 μ m band and is suitable for energy-saving coatings in high-temperature industrial furnaces.

8.3 Piezoelectric Ceramics
Adding 0.3 wt% MoO3 (thermally decomposed from Mo (acac) ₂) to PZT (lead zirconate titanate) increased the piezoelectric constant d ∝ from 320 pC/N to 380 pC/N and raised the Curie temperature by 25 ℃.
8.4 Laser Crystal
The Nd: YAG crystal prepared by the Czochralski method with Mo (acac) ₂ as a dopant has a laser threshold reduced by 18% and a slope efficiency increased to 42%, making it suitable for high-power solid-state lasers.

9.1 Fertilizer Enhancer
The molybdenum containing organic fertilizer prepared by chelating Mo (acac) ₂ with humic acid can increase the molybdenum content in wheat grains by 45%, while promoting nitrogen and phosphorus absorption, and increasing yield by 8-12%.
9.2 Food Antioxidants
The antioxidant prepared by compounding Mo (acac) ₂ with tea polyphenols has a 30% higher inhibition rate on the peroxide value of edible oil than BHT, and is non-toxic and suitable as a green food additive.

9.3 Pesticide slow-release agents
Through layer by layer self-assembly technology, Mo (acac) ₂ and insecticide imidacloprid were loaded onto mesoporous silica, achieving slow release within 7 days and increasing pesticide utilization from 35% to 68%.
9.4 Feed Additives
Adding 10 ppm molybdenum (in the form of Mo (acac) ₂) to ruminant feed can increase rumen microbial nitrogen fixation efficiency by 22% and reduce methane emissions by 15%.

10.1 Topological Insulators
By doping Mo (acac) ₂ into Bi ₂ Te ∝ and adjusting the band structure, fine tuning of the carrier concentration near the surface state Dirac point can be achieved, providing a new material platform for the study of quantum spin Hall effect.
10.2 Quantum dot light-emitting devices
The LED device composed of MoO3 quantum dots (thermally decomposed from Mo (acac) ₂) and CsPbBr O3 perovskite quantum dots has an external quantum efficiency of 14.7% and a color gamut covering 120% NTSC, making it suitable for ultra high definition display.

10.3 Biomimetic catalysis
Imitating the active center of nitrogenase, Fe-S cluster model complexes containing Mo (acac) ₂ were synthesized to achieve the reduction of N ₂ to NH ∝ at room temperature and pressure, with a Faraday efficiency of 11.2%, providing a new pathway for artificial nitrogen fixation.
10.4 Space Materials
The molybdenyl acetylacetonate aerogel prepared by Mo (acac) ₂ in microgravity environment has a density of 3 mg/cm ³ and a specific surface area of 1500 m ²/g, which has excellent shielding performance against space radiation and is suitable for deep space exploration.