Gallium acetylacetonate is an organometallic compound mainly composed of gallium ions tightly coordinated with three acetylacetone molecules. The chemical formula is usually expressed as Ga(acac)₃, where acac represents the anion part of acetylacetone (CH₃COCH₂COCH₃). This powder is usually soluble in common organic solvents such as ethanol, ether, chloroform, etc. The specific solubility depends on the type of solvent and the purity of the compound. It remains relatively stable at room temperature and standard atmospheric pressure, but direct contact with water, strong acids, strong bases, etc. should be avoided to prevent unwanted chemical reactions.
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| Chemical Formula | C15H21GaO6 |
| Molecular Weight | 367.05 |
| Melting point | 196-198 °C (dec.)(lit.) |
| Boiling point | 140°C 10mm |
| Storage conditions | Inert atmosphere,Room Temperature |
| Form | Powder |
| Color | white to pale yellow |
| Solubility | Insoluble in water. |
Gallium acetylacetonate, as an organometallic compound, has a variety of uses, mainly in the fields of materials science, catalytic chemistry, optics and electronics.
The following are some of the main uses of Gallium acetylacetonte
Catalysts and catalyst precursors
Gallium acetylacetoate is often used as a catalyst or catalyst precursor in organic synthesis and can participate in a variety of chemical reactions, such as oxidation, reduction, addition, cyclization, etc.
Preparation of Metal Organic Frameworks (MOFs)
Gallium acetylacetonae can be combined with other organic ligands or inorganic ions to form metal organic framework materials with specific structures and functions.
Preparation of Nanomaterials
Gallium acetylacetoate can be converted into gallium nanoparticles, nanowires or nanofilms through pyrolysis or other chemical methods.
Optical and electronic applications
Gallium acetylacetoate and its derivatives can exhibit unique optical or electronic properties under certain conditions, such as luminescence and conductivity. These properties make them have certain potential in the preparation of optoelectronic devices.
Chemical vapor deposition (CVD) precursor
In the semiconductor industry, Gallium acetylacetoate can be used as a precursor for chemical vapor deposition to deposit gallium or gallium compound films on substrates. This is of great significance for the preparation.
Education and research
Due to its unique chemical properties and broad application prospects, Gallium acetylacetoate is also widely used in education and research in the fields of chemistry, materials science, and nanotechnology.
Gallium acetylacetonate, as an organometallic compound, has a wide range of applications in the field of catalytic chemistry. Its application cases and prospects as a catalyst or catalyst precursor are mainly reflected in the following aspects:
Application cases
Organic synthesis reactions
Gallium acetylacetoate is often used as a catalyst in organic synthesis and can participate in a variety of chemical reactions, such as oxidation, reduction, addition, cyclization, etc. These reactions have important application value in the synthesis of fine chemicals, drug synthesis, and the preparation of polymer materials.For example, Gallium acetylacetoate can be used to catalyze the epoxidation reaction of olefins to generate epoxides, which is a key step in the synthesis of many important compounds such as drug intermediates.
Nanomaterial preparation
Gallium acetylacetoate can be used as a precursor and converted into gallium nanoparticles, nanowires or nanofilms by pyrolysis or other chemical methods.
These nanomaterials show excellent performance in the field of catalysis and can be used to catalyze various chemical reactions.For example, Gallium acetylacetoate can react with nitrogen at high temperature to generate gallium nitride nanowires, which have potential applications in optoelectronic devices, sensors and other fields.
Gas adsorption and separation
Metal organic frameworks (MOFs) materials formed by Gallium acetylacetoate combined with other organic ligands perform well in gas adsorption and separation.These MOFs materials have high porosity and adjustable pore size, and can selectively adsorb and separate specific gases.
Prospects
Development of new catalysts
With the deepening of catalytic chemistry research, scientists are constantly exploring new catalyst systems and catalytic mechanisms. As one of the representatives of organometallic catalysts, Gallium acetylacetoate's unique chemical properties and catalytic activity provide broad space for the development of new catalysts.In the future, new catalysts with higher catalytic activity and selectivity can be developed by adjusting the structure, ligands or reaction conditions of Gallium acetylacetonate to meet the needs of different fields.
Green chemistry and sustainable development
Gallium acetylacetoate and its catalytic system are of great significance in green chemistry and sustainable development. They can be used to replace traditional toxic or highly polluting catalysts to achieve more environmentally friendly and sustainable chemical reaction processes.In addition, the Gallium acetylacetoate catalytic system can also promote the recycling of resources and the reduction of waste treatment, and contribute to the construction of a circular economy system.
Interdisciplinary integration and innovation
With the rapid development and cross-integration of related disciplines such as materials science, nanotechnology, and biotechnology, the application fields of Gallium acetylacetoate are also constantly expanding and deepening.
In the future, it is foreseeable that Gallium acetylacetonte will be combined with more disciplines to produce more innovative application results and technological breakthroughs.
In summary, Gallium acetylacetoate as a catalyst has a wide range of application cases and broad development prospects in the fields of organic synthesis, nanomaterial preparation, gas adsorption and separation. With the continuous advancement of science and technology and the continuous deepening of innovative research, the catalytic application of Gallium acetylacetoate will be more extensive and in-depth.
The synthesis of gallium-acetylacetonate usually involves the coordination reaction of metal gallium and acetylacetone.
Synthesis method
(1)Raw material preparation
Metal gallium (Ga): as the central metal of the reaction.
Acetylacetone (acacH): as a ligand, forming a complex with metal gallium.
Solvent: such as ethanol, benzene, etc., used to dissolve the reactants and promote the reaction.
(2)Reaction conditions
Temperature: usually carried out at room temperature to reflux temperature, the specific temperature depends on the boiling point and reactivity of the solvent.
Stirring: ensure that the reactants are fully mixed to promote the coordination reaction.
Inert gas protection: such as nitrogen or argon to prevent oxygen and water vapor in the air from adversely affecting the reaction.
(3)Reaction steps
Add metal gallium to the solvent containing acetylacetone.
Under stirring conditions, gradually heat to the reaction temperature and keep it for a period of time to allow the reaction to proceed fully.
After the reaction is completed, the Gallium acetylacetoate product is obtained by filtering, washing, drying and other steps.
Purification: Gallium acetylacetoate products can be purified by recrystallization, sublimation and other methods to improve their purity and crystallinity as needed.
The interesting facts about Tris (2,4-pentanedionato) gallium may not be as clear and specific as its chemical properties, because gallium acetylacetonte is mainly used as a chemical research material and has a wide range of applications in academic and professional fields, while there are relatively few reports or records about its "interesting facts".
However, I can share some interesting information from the perspective of the application and research of gallium acetylacetoate.
- Gallium acetylacetonte plays an important role in materials science research.
- It is often used as a precursor for synthesizing gallium containing materials, for example, by using atomic layer epitaxy (ALE) technology, combined with acetylacetonate gallium and water or ozone as precursors, gallium oxide thin films can be prepared. This type of thin film has potential application value in the field of semiconductor materials.
- Gallium acetylacetoate also plays an important role in the synthesis of nanomaterials. Researchers have found that gallium acetylacetoate can serve as a universal precursor for synthesizing various inorganic magnetic, metal, and semiconductor nanocrystals.
- For example, in the synthesis of Fe3O4 nanocrystals, controlling the ratio of reactants can achieve control over the size of the nanocrystals. In addition, gallium acetylacetoate can also be used to synthesize high-quality ternary and binary semiconductor nanocrystals, as well as nanocrystals with special morphologies.
- Gallium acetylacetoate is also used to prepare other compounds. For example, Sn DDT complexes can be synthesized using gallium acetylacetoate as the raw material, which can induce the synthesis of sheet-like hexagonal Cu2S nanocrystals with good cylindrical self-assembly behavior.
Gallium-acetylacetonate (Ga (acac)) is an important metal organic compound with the chemical formula Ga (C ₅ H ₇ O ₂) v3, widely used in materials science, catalytic chemistry, and biomedical fields. Its discovery is closely related to the study of early metal β - diketone complexes and plays an important role in modern nanotechnology, semiconductor manufacturing, and anti-cancer drug research.
Acetylacetone (Hacac) was first synthesized by Charles Adolphe Wurtz (1817-1884) in 1863, and its enol structure allows it to form stable chelates with metal ions.
In the 1890s, chemists discovered that transition metals such as Fe ³ ⁺ and Cr ³ ⁺ could form stable six membered ring complexes with acetylacetone.
In 1901, Alfred Werner (1866-1919) proposed the theory of coordination chemistry, laying the foundation for the study of metal β - diketone complexes. However, gallium (Ga), as a later discovered element (discovered by Paul - É mile Lecoq de Boisbaudran in 1875), lags behind transition metal research in its complexes.
In the 1940s and 1950s, with the rise of semiconductor research, the demand for the synthesis of gallium compounds (such as GaAs) drove the development of gallium coordination chemistry.
In 1957, F.A. Cotton et al. first reported the synthesis of gallium-acetylacetonate while studying the coordination behavior of gallium (III):
Synthesis method: GaCl ∝+3 Hacac → Ga (acac) ∝+3 HCl
Physical properties: White crystal, melting point 192-194 ° C, easily soluble in organic solvents.
In 1963, X-ray crystallography confirmed its octahedral coordination configuration: the gallium (III) center coordinated with six oxygen atoms, and three acetylacetone ligands bound in chelation mode.
After 2010, research found that Ga (acac) ∝ has anti-tumor activity: simulating Fe ³ ⁺ to interfere with iron metabolism in cancer cells, clinical trials are preliminary studies targeting osteosarcoma and lymphoma. As a single source precursor for the preparation of GaN and GaP nanoparticles.
From early theoretical exploration of coordination chemistry to cutting-edge semiconductor manufacturing and innovative biomedical anti-tumor research, gallium-acetylacetonate has run through the entire developmental trajectory of inorganic chemistry and functional material science.
Originating from the research system of metal β-diketone complexes and benefiting from the advancement of gallium element-related disciplines, this chelate compound not only bears the historical heritage of classic coordination theory proposed by Alfred Werner but also responds to the practical demands brought by the booming semiconductor industry in the mid-20th century.Its clear octahedral molecular structure, controllable synthesis route and distinctive physicochemical properties endow it with dual core positioning: it acts as a standard research model for basic chemical mechanism exploration.
And also serves as an irreplaceable single-source precursor for preparing gallium-based semiconductor nanomaterials.More importantly, the newly uncovered anti-tumor biological activity opens up a brand-new interdisciplinary research direction spanning materials and oncology. Integrating fundamental theoretical value, industrial preparation practicability and promising medical therapeutic potential all in one, this compound will undoubtedly remain a key research object, continuously driving breakthroughs in the fields of optoelectronic material fabrication and targeted tumor treatment in subsequent academic and industrial research.
references
Nieminen M, Niinistö L, Rauhala E. Growth of gallium oxide thin films from gallium-acetylacetonate by atomic layer epitaxy[J]. Journal of Materials Chemistry, 1996, 6(1): 27-31.
Ghanta P, Winschel T, Hessel E, et al. Efficacy assessment of methylcellulose-based thermoresponsive hydrogels loaded with gallium-acetylacetonate in osteoclastic bone resorption[J]. Drug Delivery and Translational Research, 2023, 13: 2533–2549.
Massey A J. Vapor Pressure and Heat of Sublimation of gallium-acetylacetonate[D]. Williamsburg: College of William & Mary, 1967.
FAQ
Q1: What solvents can dissolve gallium acetylacetonate, and what substances should it avoid contacting?
A1: This complex dissolves well in common organic solvents including ethanol, diethyl ether and chloroform. It should be isolated from liquid water, concentrated strong acids and strong alkalis, as direct contact will trigger irreversible decomposition and destroy its original molecular chelate structure.
Q2: What are the two core application directions of gallium-acetylacetonate in modern research?
A2: It serves as a single-source metal-organic precursor for manufacturing gallium-based semiconductors, Ga₂O₃ thin films and gallium-containing nanomaterials via MOCVD or ALD. Besides materials synthesis, it is also studied in biomedicine for anti-tumor and anti-osteoclast effects by interfering with intracellular iron metabolism of tumor cells.
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