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3-Phenyltoluene is an organic compound with CAS 643-93-6 and molecular formula C13H12. It is a colorless or light yellow crystal with slight yellow fluorescence under sunlight. It can be soluble in organic solvents such as ethanol, ether, benzene, and carbon tetrachloride, but not in water. It has a high ignition point and is not prone to spontaneous combustion, but it still needs to be properly stored in a fireproof environment. Has high optical transmittance. Has weak alkalinity and can react with acids. At the same time, it also has a moderate degree of ionization. It can also be used to prepare laser materials. Laser is a high brightness and good monochromaticity light source, widely used in industrial, medical, scientific research and other fields. It can be used as a laser dye or gain medium to adjust the performance of laser output power, wavelength, and stability. By combining with other organic molecules or inorganic crystals, the performance of laser materials can be further optimized.
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Chemical Formula |
C13H12 |
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Exact Mass |
168 |
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Molecular Weight |
168 |
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m/z |
168 (100.0%), 169 (14.1%) |
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Elemental Analysis |
C, 92.81; H, 7.19 |
3-Phenyltoluene has a wide range of applications in the field of solar cells. The following is a detailed description of its uses in various aspects of solar cells:
Material synthesis:
It can be used as one of the main materials for synthesizing organic solar cells. This type of organic solar cell typically consists of an organic photosensitive layer and an electrode, where the organic photosensitive layer is made of organic dyes or organic semiconductor materials. It can be used as an organic dye or part of an organic semiconductor material, combined with other organic molecules to form a photosensitive layer for solar cells.
Photoelectric conversion efficiency:
The photoelectric conversion efficiency is relatively high, so it can be used to improve the photoelectric conversion efficiency of solar cells. By optimizing the photosensitive layer and structure of solar cells, the photoelectric conversion efficiency and stability of solar cells can be further improved. This optimization can include changing the thickness, composition, and arrangement of the photosensitive layer, as well as changing the material and structure of the electrode.
Stability:
It has good thermal and chemical stability and can be used to improve the stability and lifespan of solar cells. Solar cells need to operate in different environments and conditions, therefore they need to have good stability and lifespan. By using 3-methylbiphenyl as one of the materials for solar cells, the service life and stability of solar cells can be extended.
Flexible solar cells:
They can also be used to prepare flexible solar cells. Flexible solar cells are a type of flexible, lightweight, and portable solar cell that can be applied to surfaces or objects of various shapes. Flexible solar cells with high photoelectric conversion efficiency and good flexibility can be prepared by using methylbiphenyl and other organic materials. This type of solar cell is suitable for various fields, such as architecture, automotive, aerospace, etc.
Photovoltaic effect:
It also has applications in the photovoltaic effect. Photovoltaic effect refers to the phenomenon where electrons on a material surface are excited by light and leave the surface of the object, forming an electric current. By using methyl biphenyl as one of the materials for solar cells, the degree and efficiency of photovoltaic effects can be enhanced, thereby increasing the output current and voltage of solar cells.
Band structure adjustment:
The performance of solar cells can also be improved by adjusting their band structure. Band structure refers to the distribution of electrons and energy within a molecule. By changing the chemical structure of 3-methylbiphenyl, its band structure can be adjusted to make it more suitable as a photosensitive material, thereby increasing the photoelectric conversion efficiency of solar cells.
Interface modification:
It can also be used for modifying the interface of solar cells. The interface of solar cells is a key area for electron transfer and light absorption, so the properties of the interface have a significant impact on the performance of solar cells. By modifying the interface with methylbiphenyl or other organic molecules, the properties of electron transfer and light absorption can be improved, thereby enhancing the performance of solar cells.
Dye sensitization:
It can also be used as a sensitizing dye for dye-sensitized solar cells. Dye sensitized solar cells are solar cells that use dyes as photosensitive materials, which can absorb sunlight and convert it into electricity. By using methylbiphenyl as part of the sensitized dye, the adsorption performance and photoelectric conversion efficiency of the dye can be improved, thereby enhancing the performance of solar cells.
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Synthesis method
Firstly, the mixture of 3-bromotoluene and iron powder was reacted in a solvent to obtain an iron bromide complex. This step is to prevent the dehydrogenation of 3-bromotoluene in the subsequent reaction. The specific reaction equation is as follows:
(C6H4)CH3Br + Fe → (C6H4)CH3FeBr
Mix the iron bromide complex obtained in the previous step with phenylboronic acid in a solvent for complexation reaction. The purpose of this step is to utilize the interaction between the boron and iron atoms of phenylboronic acid to transfer the methyl group of 3-bromotoluene to phenylboronic acid. The specific reaction equation is as follows:
(C6H4)CH3FeBr + PhB (OH) 2 → (C6H4)CH3PhB(OH) + FeBr2
The complex obtained in the previous step is reduced to ferrous ions by reducing agents (such as hydrogen, sodium, etc.), while phenylboronic acid is reduced to biphenyl. The purpose of this step is to separate iron ions and phenylboronic acid from the complex and obtain the target product 3-methylbiphenyl. The specific reaction equation is as follows:
(C6H4)CH3PhB(OH) + Na + H2O → (C6H4)CH3PhB(OH)Na + NaOH
(C6H4)CH3PhB(OH)Na + H2 → (C6H4)CH3PhB(OH) + NaOH
Extract and purify the mixture obtained in the previous step to obtain a high-purity 3-methylbiphenyl. The specific steps include mixing the mixture with appropriate solvents, performing extraction and distillation operations to obtain high-purity 3-methylbiphenyl.
This method is a common synthesis method in the laboratory, and the product purity can reach 99%. The product has high purity, low pollution, and low operational difficulty, making it an excellent synthetic route.
3-Phenyltoluene, also known as meta-phenyltoluene, is an aromatic hydrocarbon compound belonging to the class of biphenyl derivatives. Structurally, it consists of a toluene molecule (methylbenzene) with a phenyl group (a benzene ring minus one hydrogen atom) attached to the meta position (the third carbon) of the toluene's benzene ring. This arrangement imparts unique chemical and physical properties to 3-phenyltoluene, distinguishing it from other isomers like ortho- and para-phenyltoluene.
Chemically, it is characterized by its stability and reactivity typical of aromatic compounds. It participates in various organic reactions, including electrophilic aromatic substitution, due to the electron-donating nature of the methyl group, which activates the benzene ring towards such reactions. This reactivity makes it a valuable intermediate in the synthesis of more complex organic molecules, such as pharmaceuticals, agrochemicals, and advanced materials.
Physically, it is a colorless to pale yellow liquid with a distinct aromatic odor. It has a relatively high boiling point and is insoluble in water but soluble in organic solvents like ethanol and ether. These properties make it suitable for use in industrial applications where solvent compatibility and thermal stability are required.
In industrial settings, it finds applications as a solvent in paints, coatings, and adhesives, leveraging its ability to dissolve a wide range of organic substances. Additionally, it serves as a precursor in the production of specialty chemicals, including dyes, fragrances, and polymers. Its presence in these applications underscores its versatility and importance in both the chemical and manufacturing industries.
Environmentally, care must be taken in handling it due to its potential toxicity and persistence in the environment. Proper disposal and recycling practices are essential to mitigate any adverse effects on ecosystems.
In summary, 3-phenyltoluene is a significant aromatic compound with diverse applications, driven by its unique structural features and chemical reactivity. Its role in organic synthesis and industrial processes highlights its value in modern chemistry and manufacturing.
adverse reaction
3-methylbiphenyl is widely used in industry, mainly as a solvent in the manufacturing of coatings, adhesives, and inks. It can also be used as an organic synthesis intermediate in the production of dyes, fragrances, and liquid crystal materials. Although its chemical properties are relatively stable, long-term exposure or improper use may pose health and environmental risks. The following are its adverse reactions:
Acute toxic reaction
The transdermal LD of mice was 122 mg/kg, indicating that high concentration exposure may cause skin corrosion or irritation. In actual cases, industrial operators experienced redness, swelling, and peeling at the contact area due to not wearing protective gloves. However, this was relieved after rinsing and anti-inflammatory treatment. Flash point ＞ 110 ° C (part of the literature ＞ 230 ° F) indicates that it is not flammable at room temperature, but volatile vapor may be generated during heating or spray operation.
Acute toxic reaction
The acute inhalation toxicity test in rats showed that exposure to a concentration of 5 mg/L for 4 hours did not cause death, but symptoms of poisoning such as increased respiratory rate and reduced activity appeared. In animal experiments, the oral LD ₅₀ data of mice is missing, but the LD ₅₀ of similar biphenyl compounds (such as biphenyl itself) is about 2-4 g/kg, suggesting that 3-methylbiphenyl has lower oral toxicity. However, ingestion of high concentration solutions in industrial accidents may cause gastrointestinal irritation, manifested as nausea and vomiting.
Chronic health effects
In vitro experiments (such as Ames test) did not show mutagenicity, but there is a lack of long-term animal carcinogenicity research data. In the occupational epidemiological survey, no significant increase in the incidence rate of cancer was found among the contacts, but regular health monitoring is recommended. Animal experiments have shown that exposure to high doses (≥ 500 mg/kg/d) during pregnancy in rats may lead to fetal weight loss, but there is no clear evidence of increased malformation rates.
Chronic health effects
Human research data is limited, and pregnant and lactating women should avoid contact. Long term inhalation of high concentration vapors may cause mild edema of liver cells, and a temporary increase in serum transaminase levels (ALT, AST), which can be restored after discontinuation of medication.
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