NINGBO INNO PHARMCHEM CO.,LTD. is dedicated to providing high-quality chemical compounds for scientific research and industrial applications. Among our offerings, (6,6)-Phenyl C61 Butyric Acid Methyl Ester (PCBM) is a notable fullerene derivative whose synthesis and properties are of significant interest in the field of organic electronics.

The synthesis of PCBM typically involves the functionalization of fullerene C60. A common and efficient method is the reaction of C60 with reagents that introduce the phenylbutyric acid methyl ester group. One such established route is the Prato reaction, or variations thereof, which involves the [3+2] cycloaddition of azomethine ylides to C60. This reaction allows for the regioselective addition of functional groups to the fullerene cage, yielding a mixture of isomers, with the (6,6)-isomer being particularly important for electronic applications due to its specific electronic and structural characteristics.

The physicochemical properties of PCBM are critical to its utility. Its molecular formula is C72H14O2, with a molecular weight of approximately 910.88 g/mol. A key characteristic is its appearance: typically a dark brown powder. Unlike the parent fullerene C60, PCBM exhibits significantly improved solubility in common organic solvents such as toluene, chlorobenzene, and dichlorobenzene. This enhanced solubility is due to the presence of the long alkyl chain and ester group, which reduces intermolecular forces and facilitates dissolution.

Further important properties include its UV absorption characteristics, with absorption maxima often observed around 294 nm and 340 nm in toluene. While not typically fluorescent, its electronic band structure makes it an excellent n-type semiconductor. Its electron mobility is reported to be in the range of 10^-4 to 10^-3 cm^2/V·s, depending on the purity and processing conditions. For optimal performance in electronic devices like organic photovoltaics and field-effect transistors, a purity of >99% is generally recommended.

Regarding storage, PCBM is best kept under nitrogen atmosphere at temperatures between 2-8°C to maintain its integrity and performance. Proper handling and storage are essential to preserve its high purity and electronic properties, ensuring reliable results in experimental and industrial applications. NINGBO INNO PHARMCHEM CO.,LTD. ensures that our PCBM products meet stringent purity standards, supported by detailed analytical data such as HPLC and 1HNMR spectra upon inquiry.

In summary, the synthesis of PCBM involves controlled functionalization of C60, and its distinctive properties, including good solubility, n-type semiconducting behavior, and high electron mobility, make it an indispensable material for advancements in organic electronics.