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Ferrocene powder is a chemical compound with the scientific name iron(II) cyclopentadienide. It is also commonly referred to as bis(cyclopentadienyl)iron. It consists of an iron(II) atom sandwiched between two parallel cyclopentadienyl rings. This unique "sandwich" structure is a hallmark of organometallic chemistry. It is a diamagnetic material that is extremely stable to air, moisture, and light. Its stability makes it a versatile compound in various applications. Its wide range of applications, from fuel additives to catalysts and research tools, underscores its importance in various industries and scientific disciplines. With proper handling and storage, it can be safely utilized to its full potential.
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Chemical Formula |
C10H10Fe |
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Exact Mass |
186.01 |
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Molecular Weight |
186.04 |
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m/z |
186.01 (100.0%), 187.02 (10.8%), 184.02 (6.4%), 187.01 (2.3%) |
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Elemental Analysis |
C, 64.56; H, 5.42; Fe, 30.02 |
Other Properties
- Stability: Stable at room temperature. However, it is sensitive to strong oxidizing agents.
- Incompatibility: Incompatible with strong oxidizing agents.
- Thermal Stability: Highly stable up to 400 °C without decomposition. Above 400 °C, it decomposes with the release of pungent and irritating fumes.
- Electrophilic Substitution Reactions: Ferrocene powder exhibits aromatic properties and can undergo electrophilic substitution reactions such as sulfonation, acylation, and alkylation.
- Charge Transfer Complexes: It can form charge transfer complexes with compounds like tetracyanoethylene (TCNE) and nitrobenzene.
- Oxidation: In solution, Ferrocene can be oxidized by air to form Ferrocenium ions.
- Non-reactivity: It is not suitable for catalytic hydrogenation or as a diene in Diels-Alder reactions.
- UV-Vis Spectroscopy: In ethanol and ethane, Ferrocene exhibits strong absorption bands at 325 nm and 440 nm in its UV spectrum.
- Aromaticity: Ferrocene possesses aromatic character, making it a non-benzenoid aromatic compound.
- Magnetic Properties: Certain derivatives of Ferrocene, such as fully methyl-substituted Ferrocene, exhibit unusual magnetic properties.
- Hazardous Class: Flammable solid
- Risk Phrases: R11 (Highly flammable), R22 (Harmful if swallowed), R51/53 (Toxic to aquatic organisms, may cause long-term adverse effects in the aquatic environment)
- Safety Phrases: S61 (Avoid release to the environment. Refer to special instructions/safety data sheets.), S22 (Do not breathe dust.), S24/25 (Avoid contact with skin and eyes.)
Ferrocene (chemical formula: Fe (C5H5)2) is an organic transition metal compound with a sandwich structure. With its unique physical and chemical properties such as high thermal stability, chemical stability, radiation resistance, and aromaticity, it has shown extensive application value in various fields such as energy, aerospace, medicine, materials, and environmental protection.
1. Fuel energy-saving and smoke reducing agent
As a smoke reducing and combustion assisting agent for fuels such as diesel, gasoline, and heavy oil, it improves fuel utilization efficiency and reduces pollutant emissions through catalytic combustion reactions.
Data support: Adding 0.1% ferrocene to automotive diesel can save fuel by 10% -14%, increase fuel utilization by 10% -13%, and reduce exhaust smoke by 30% -80%; Adding 0.3% to heavy oil and 0.2% to coal reduces fuel consumption and smoke intensity by 30%.
Mechanism of action: The iron atoms in ferrocene molecules act as active centers, promoting the cracking of fuel molecules, accelerating the oxidation of carbon particles, and reducing the formation of carbon deposits.
Application case: The ferrocene products of Shijiazhuang Fantawild Chemical Co., Ltd. have solved the problems of insufficient combustion and excessive exhaust emissions for refineries, fuel blending enterprises, and civilian fuel suppliers through precise control of molecular structure and purity. The products comply with EU environmental standards.
2. Replace toxic additives
Can replace traditional toxic additives (such as tetraethyl lead) as gasoline anti knock agents to increase octane rating.
Technical parameters: Adding 0.0166-0.0332g/L ferrocene and 0.05-0.1g/L tert butyl acetate to gasoline increases the octane number by 4.5-6 units.
Environmental Value: Eliminate the pollution and toxicity of fuel emissions to the environment and human health, and promote the popularization of unleaded gasoline.
3. Synthetic fuel additives
Plays a key role in synthetic gasoline and artificial liquefied gas:
Synthetic gasoline: By adding 0.01% -0.5% ferrocene and related additives, 80 #, 85 #, and 90 # synthetic gasoline can be formulated.
Artificial liquefied gas: 0.03% ferrocene is added to methanol, with a combustion value of 3372-38656kJ/kg; Adding 0.005% -0.008% ferrocene to a methanol ethanol mixed solution can produce a new and efficient civilian fuel.
Market application: Shijiazhuang Fantawild Chemical produces high-performance artificial liquefied gas by scientifically proportioning ferrocene and sodium methoxide, meeting the clean energy needs of household users.
1. Rocket propellant burning rate catalyst
As a solid rocket combustion rate regulator, improving propellant performance by regulating combustion rate:
Technical advantages: Achieve ultra-high combustion rate, improve the mechanical properties of solid propellants, and prevent structural damage caused by uneven combustion.
Application scenario: Adding ferrocene powder to ammonium perchlorate based composite propellants can accurately control the oxidation rate and calorific value, meeting the high performance requirements of propellants for missiles, rockets, and other spacecraft.
Data support: According to data from 2023, the consumption of ferrocene in missile propellants accounts for over 73%, making it a core functional material.
2. Synthesis of Aerospace Materials
The application in the field of aerospace materials extends to polymer material modification:
Silicone resin and rubber curing agent: Ferrocene derivatives are used as curing agents to enhance the cross-linking density and heat resistance of silicone resin and rubber, meeting the requirements of spacecraft sealing materials.
Case: Ferrocene catalyzed silicone resin maintains elasticity at extreme temperatures and is used for sealing rings in rocket engines.
1. Drug synthesis catalyst
Ferrocene and its derivatives as catalysts to accelerate drug molecule synthesis reactions:
Asymmetric synthesis: Ferrocene based chiral ligands form composite catalysts with transition metals such as rhodium and palladium, catalyzing asymmetric Diels Alder reactions, allylation reactions, etc., with significantly improved yields and enantioselectivity.
Example: Ferrocene catalyzed cross coupling reaction of halogenated hydrocarbons for efficient synthesis of anticancer drug intermediates, with reaction time reduced from several hours to minutes.
2. Drug carriers and targeted delivery
By improving drug solubility and controlling release rate, the therapeutic effect can be enhanced
Nanoparticle carrier: Ferrocene PEG nanoparticles loaded with chemotherapy drugs to achieve tumor targeted delivery and reduce systemic toxicity.
Photodynamic therapy: Ferrocene derivatives act as photosensitizers to generate singlet oxygen under light, selectively killing cancer cells.
Research progress: Ferrocene based photosensitizers kill more than 90% of breast cancer cells and have low toxicity to normal cells.
3. Physiologically active drug raw materials
Ferrocene and its derivatives have physiological activities such as anti anemia and anti-tumor effects
Blood supplement: Ferrocene derivatives (such as ferrocene penicillin) promote hemoglobin synthesis and are used to treat iron deficiency anemia.
Antitumor drugs: Ferrocene compounds inhibit tumor cell proliferation by binding to DNA and have been studied for the treatment of leukemia and lung cancer.
1. Modification of polymer materials
Ferrocene derivatives extend the service life of materials by preventing polyethylene photodegradation, improving thermal stability:
Agricultural film: Polyethylene film with added ferrocene derivatives can naturally degrade and break within a certain period of time without affecting cultivation and fertilization.
Industrial application: As a protective agent for polypropylene and polyester fibers, it improves the heat resistance and weather resistance of plastics, rubber, and fibers.
2. Conductive polymer materials
Ferrocene based polymers form metal containing polymers through covalent bonding, which are used to prepare electrode materials for organic light-emitting diodes (OLEDs)
Technological breakthrough: Ferrocenyl selenide is synthesized through ring opening polymerization reaction, which has high conductivity and thermal stability and can be used in flexible electronic devices.
3. Synthesis of carbon materials
As a catalyst, promoting carbon fiber growth in chemical vapor deposition (CVD):
High quality carbon fiber: Using ferrocene as a catalyst, carbon fiber products with uniform diameter and high strength can be obtained for aerospace composite materials.
1. Waste gas treatment
Ferrocene catalyzed decomposition of nitrogen oxides (NOx) and volatile organic compounds (VOCs) to reduce industrial waste gas pollution:
Technical parameters: The ferrocene based catalyst has increased the NOx conversion rate to 95% in automobile exhaust treatment, meeting the EU emission standards.
Application scenario: Ferrocene catalyst is widely used in exhaust gas treatment equipment of refineries and chemical plants.
2. Wastewater treatment
Degradation of organic pollutants through redox reactions to improve water quality:
Example: Ferrocene catalyzes the decomposition of hydrogen peroxide, generating hydroxyl radicals and efficiently degrading difficult to degrade organic compounds such as dyes and pesticides.
Agricultural sector: Efficiency improvement and sustainable development
1. Synthetic ammonia catalyst
Ferrocene and potassium adsorb on activated carbon as catalysts for ammonia synthesis, improving yield under mild conditions
Data support: As the content increases, the catalytic activity also increases, resulting in a 20% increase in ammonia synthesis yield and a 15% reduction in energy consumption.
2. Rubber curing agent
Ferrocene derivatives serve as rubber curing agents, promoting cross-linking of rubber molecules and enhancing the strength and durability of rubber products
Application scenario: In the production of rubber products such as tires and seals, curing agents can shorten vulcanization time and improve production efficiency.
Synthesis Method
It is obtained by heating iron powder and cyclopentadiene in nitrogen atmosphere of 300 ℃, or by reacting anhydrous ferrous chloride and cyclopentadiene sodium in tetrahydrofuran. Electrolytic synthesis method can also be used. Ferrocene powder can be synthesized from cyclopentadiene, ferrous chloride and diethylamine by the following method. Under stirring, anhydrous ferric chloride (FeCl3) is added into tetrahydrofuran in several times, then iron powder is added, heated and refluxed for 4.5H under the protection of nitrogen to obtain ferrous chloride solution. The solvent tetrahydrofuran is evaporated under reduced pressure to obtain nearly dry residue. Under the cooling of ice bath, add the mixture of cyclopentadiene and diethylamine, stir vigorously at room temperature for 6-8h, evaporate the excess amine under reduced pressure, and reflux extract the residue with petroleum ether. After the extraction liquid is filtered while hot and the solvent is evaporated, the crude ferrocene is obtained. Recrystallization with pentane or cyclohexane, or purification by sublimation, is the refined product with a yield of 73-84%.
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