TRI-N-OCTYLPHOSPHINE CAS 4731-53-7

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TRI-N-OCTYLPHOSPHINE is an important tertiary phosphine ligand. Its molecular structure is characterized by a central phosphorus atom connected to three linear octyl carbon chains, forming a three-alkylphosphine compound with significant steric hindrance. This substance typically appears as a colorless or pale yellow viscous liquid, with a distinctive phosphorus-containing organic odor, and is insoluble in water but readily soluble in most organic solvents.

In the field of chemical synthesis, it plays an indispensable and irreplaceable role, especially as an excellent electron ligand, which can coordinate with various post-transition metals and rare earth metals including gold, cadmium, and zinc, effectively stabilizing the metal center and regulating its reactivity, and thus is widely used in the controlled preparation of nanocrystals, such as serving as a key surfactant in the synthesis of quantum dots to precisely control particle size and morphology. Additionally, it also plays a crucial role in transition metal-catalyzed cross-coupling reactions. However, its high air sensitivity - prone to spontaneous oxidation and even combustion when exposed to air - requires storage and operation under strict anhydrous and oxygen-free conditions (such as glove boxes or Schlenk techniques), which constitutes the core challenge and necessary condition for its storage and application.

Tri-n-octylphosphine (CAS number: 4731-53-7) is an organic phosphine compound with wide applications in metal extraction.

It is a colorless liquid with good selectivity, high extraction efficiency, fast extraction speed, and easy operation. It also has low volatility and high thermal stability, making it suitable for metal ion extraction under high temperature and high pressure conditions. These characteristics make it have broad application prospects in the field of metal extraction.

1. As an extractant

 

Often used as an organic extractant to extract metal ions from solutions. Due to its excellent selectivity and extraction efficiency, it can effectively separate and extract target metal ions while reducing interference from impurities.
(1) Extraction of Rare Earth Elements
Rare earth elements are a type of element with special physical and chemical properties, which have a wide range of applications in high-tech fields. It can form stable complexes with rare earth elements, thereby achieving the extraction and separation of rare earth elements. This extraction method is not only efficient, but also easy to operate and suitable for large-scale production.

 

(2) Extraction of uranium
Uranium is an important nuclear fuel element, and its extraction and separation are of great significance for the development of nuclear energy. As an extractant, it can effectively extract uranium ions from uranium containing solutions. This extraction method has the advantages of good selectivity and high extraction efficiency, and is one of the important means for nuclear fuel extraction and recovery.
(3) Extract other metal ions
In addition to rare earth elements and uranium, it can also be used to extract other metal ions such as thorium, niobium, etc. These metal ions have important application value in industrial production, and their extraction methods provide effective means for their extraction and separation.

It can also be used as an organic solvent for dissolving and extracting metal ions. Its good solubility and stability make it play an important role in the dissolution and extraction of metal ions. 

2. As an organic solvent

 

(1) Dissolve metal salts
It can dissolve some metal salts to form a stable solution. This solution can be used for subsequent metal ion extraction and separation processes, improving the recovery rate and purity of metal ions.
(2) Extracting metal ions
As an organic solvent, it can effectively extract metal ions from solutions. Its excellent extraction and dissolution properties make it widely applicable in the extraction process of metal ions.

It also plays an important role in the transformation of metal nanocrystals. It can convert metal nanocrystals, bulk powders, foils, wires, thin films and other materials into metal phosphides, thereby endowing these materials with new physical and chemical properties.

3. Used for the conversion of metal nanocrystals

 

(1) Conversion principle
Tri-n-octylphosphine reacts with metal ions to form metal phosphides. This conversion process can be achieved by controlling reaction conditions and reaction time to obtain metal phosphide materials with specific structures and properties.
(2) Application Fields
Metal phosphide materials have broad application prospects in fields such as catalysts, electrode materials, and energy storage materials. As a conversion agent, it provides an effective method for the preparation of these materials.

It can also be used as a solvent and stabilizer for the synthesis of cadmium sulfide nanorods from cadmium acetate and sulfur.

4. Used for synthesizing cadmium sulfide nanorods

 

(1) Reaction principle
In its presence, cadmium acetate and sulfur can react to form cadmium sulfide nanorods. As a solvent and stabilizer, it can effectively control the morphology and size of cadmium sulfide nanorods.
(2) Application Fields
Cadmium sulfide nanorods have broad application prospects in fields such as photocatalysis and photoelectric conversion. As a solvent and stabilizer for synthesizing cadmium sulfide nanorods, it provides strong support for research in these fields.

Quantum dot materials with specific properties can also be obtained by coating zinc sulfide shells on cadmium selenium quantum dot cores through successive ion layer adsorption reactions. 

5. Used for coating zinc sulfide shell on cadmium selenium quantum dot cores

 

(1) Principle of encapsulation
In its presence, the zinc sulfide shell can be coated onto the cadmium selenium quantum dot core through a sequential ion layer adsorption reaction method. This encapsulation process can effectively improve the stability and luminescence performance of quantum dots.
(2) Application Fields
Cadmium selenium quantum dots coated with zinc sulfide shells have broad application prospects in fields such as light-emitting diodes and biomarkers. As a coating agent, it provides strong support for research in these fields.

It can also be used as one of the reagents for synthesizing fluorescent tracers. By using it as a solvent to synthesize sulfonic metal phthalocyanine fluorescent compounds, fluorescent tracers with excellent performance can be obtained.

6. Used for synthesizing fluorescent tracers

 

(1) Synthesis principle
Metal phthalocyanine compounds with fluorescent emission properties can be synthesized through specific chemical reactions using it as a solvent. This compound can be used as a fluorescent tracer in fields such as biomarkers and environmental monitoring.
(2) Application Fields
Fluorescent tracers have broad application prospects in fields such as biological science research and environmental monitoring. As one of the reagents for synthesizing fluorescent tracers, it provides strong support for research in these fields.

It has many advantages in metal extraction, making it widely applicable in this field.

 

1. Good selectivity
The complexation between it and metal ions has a high degree of selectivity. It can selectively form complexes with target metal ions, thereby achieving effective extraction and separation of target metal ions. This selective feature gives it significant advantages in metal extraction processes.
2. High extraction efficiency
As an extractant, it has efficient extraction performance. It can quickly form complexes with metal ions and extract them from the solution. This efficient extraction performance enables it to quickly and accurately extract target metal ions during the metal extraction process.

 

3. Easy to operate
The usage process is relatively simple. It can form complexes with metal ions through simple chemical reactions and obtain target metal ions through simple separation and purification steps. The simplicity of this operation makes it easy to operate and control during the metal extraction process.
4. Good stability
Has good stability. It can exist stably at room temperature and pressure, and is not easily decomposed or deteriorated. This stable characteristic enables tri-n-octylphosphine to maintain stable performance during metal extraction, thereby ensuring the smooth progress of the extraction process.

TRI-N-OCTYLPHOSPHOSINE (tri octylphosphine) is a Organophosphorus chemistry, which has a wide range of applications. Three commonly used methods for synthesizing TRI-N-OCTYLPHOSPHINE will be introduced.

1. Phosphorus trichloride method:

Phosphorus trichloride method is one of the main methods for synthesis of product. The specific steps are as follows:

1) In an inert atmosphere, n-octyl bromide reacts with Phosphorus trichloride in a dry environment to produce tri-n-octyl phosphorus bromide (P (O) (OCT) 3).

2) Mix the obtained product with thiourea (or thiouracil), heat it to a higher temperature, replace bromine atom with phosphine atom through Nucleophilic substitution, and generate TRI-N-OCTYLPHOSPHOSINE.

2. Direct phosphating method:

Direct phosphating method is another commonly used method for preparing it. The steps are as follows:

1) Add octanol and phosphorus (usually tri-n-butylphosphine) to the reactor.

2) React at high temperatures and use excessive phosphorus to promote the reaction.

3) After an appropriate reaction time, it will be generated in the reaction mixture.

3. Hydrogenated phosphorus method:

The hydrogenated phosphorus method is a relatively new method for preparing product, which has higher selectivity and lighter process conditions. The steps are as follows:

1) React tri-n-octylphosphate bromide with hydrogen gas in the presence of a catalyst.

2) Using appropriate solvents and reaction temperatures, tri-n-octylphosphate bromide is hydrogenated to product through catalytic hydrogenation reaction.

It should be noted that during the synthesis process of product, the following points should be noted:

1) Before the reaction, it is necessary to ensure the dryness of the reactor and reagents to avoid the influence of moisture on the catalyst or reactants.

2) Due to the use of some toxic substances during the synthesis process, please strictly follow the safety operating procedures and take necessary protective measures.

3) During the reaction process, the reaction temperature, reaction time, and the proportion of reactants should be controlled to ensure high yield and purity.

4) Finally, the synthesized TRI-N-OCTYLPHOSPHINE can undergo a series of purification steps, such as recrystallization, distillation, etc., to obtain a purer product.

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