Abstract − Analytical Sciences, 20(5), 783 (2004).
An Application of Plastic Microchannel-Microheater Chips to a Thermal Synthetic Reaction
Noboru KITAMURA, Yukiko HOSODA, Kosei UENO, and Satoshi IWATA
Division of Chemistry, Graduate School of Science, Hokkaido University, Sapporo 060-0810, Japan
Polystyrol microchannel-microheater chips were fabricated on the basis of imprinting and photolithography techniques. The solution (i.e., methanol) temperature in the vicinity of the microheater (width = 100 or 200 µm and length = 100 µm) integrated in the channel (width = 100 µm and depth = 20 µm) was evaluated on the basis of the temperature-dependent fluorescence lifetime of Rhodamine B as a function of a flow rate and the voltage applied to the heater. The study demonstrated that the fabricated chip acted certainly as a microheater. The chip was then applied to the thermal reaction between benzaldehyde and malononitrile in methanol. Under optimum conditions, benzilidenemalononitrile as the product of the reaction was obtained in a 96% yield with the reaction time of 84 s.
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