Molecularly imprinted fullerene-silica nanocomposite particles for sensitive and selective recognition of diethylstilbestrol

作者：Kim Youngdo; Jeon Jae Bum; Chang Ji Young^*

来源：Materials Letters, 2016, 182: 235-239.

DOI：10.1016/j.matlet.2016.06.099

• Molecular imprinting
• Fullerene
• Fluorescence quenching
• Silica particle
• Diethylstilbestrol

A highly sensitive, molecularly imprinted fluorescent sensor was fabricated using a C-60 fullerene as the signal transducer and silica as the imprinting matrix. The incorporation of C-60 and the formation of diethylstilbestrol (DES) imprinted sites in the silica network were achieved by the sol-gel method. C-60 has a narrow band gap between the ground and excited states, resulting in a weak photoluminescence. However, C-60 showed a strong emission when it was incorporated into a molecularly imprinted silica matrix. DES imprinted fullerene-silica nanocomposite particles (MIFSNCs) showed an intense fluorescence emission with the peak maximum at similar to 600 nm. The fluorescence intensity of MIFSNCs significantly decreased with increasing DES concentration. MIFSNCs exhibited a linear Stern-Volmer relationship for DES and its structural analogs. The quenching constant of MIFSNCs for DES was about five times higher than those for DES analogs, indicating the highly selective recognition property.

• 出版日期2016-11-1