Rapid synthesis of Gemini surfactants using a novel 915-MHz microwave apparatus

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  • Horikoshi Satoshi
    Department of Material & Life Science, Faculty of Science and Technology, Sophia University
  • Sato Tatsuro
    Department of Pure and Applied Chemistry, Faculty of Science Tokyo University of Science
  • Abe Masahiko
    Department of Pure and Applied Chemistry, Faculty of Science Tokyo University of Science

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Rapid synthesis of Gemini surfactants (C12-C2-C12 and C14-C6-C14) by microwave heating is investigated. The yield of the synthesis of C12-C2-C12 surfactant using 2.45-GHz microwaves was twice the yield obtained by the oil bath method. Moreover, the value of dielectric loss and microwave penetration depth for the sample solution suggest that the microwave frequency of 915 MHz (0.915 GHz) is preferable over the conventional frequency (2.45 GHz). A novel 915-MHz microwave organic synthesis apparatus with a closed reactor is proposed. The synthesis yields of C12-C2-C12 obtained using the 915-MHz equipment were three to four times higher than those obtained using the conventional heating method.

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