A newly proposed method of large-scaled line plasma production is studied with the microwave of 2.45 GHz. In this method, the narrowed rectangular waveguide of 62.0 mm in width, which is close to the cutoff condition for TE 10 mode, is examined to produce 1.1 m line plasma. The Ar plasma thus produced becomes a very high density, as high as more than 6 times larger than the cutoff density, and its axial uniformity is within 5% in the entire plasma. It is also found that the short plunger equipped at the end of waveguide produces a standing wave.
A crown ether/amine-type [2]rotaxane was synthesized and utilized as a probe for the detection of acids and anions. The addition of acids to the amine-type [2]rotaxane solution generated corresponding crown ether/ammoniumtype [2]rotaxanes, which were purified by silica gel column chromatography as ammonium salts. The isolated yields of the [2]rotaxanes, possessing a variety of anions, depended on the acidity and polarity of the counter anions. The behaviours of the ammonium-type [2]rotaxanes on thin-layer chromatography (TLC) silica gel reflected the properties of the counter anions. The treatment of the amine-type [2]rotaxane with acids afforded the corresponding ammonium-type [2]rotaxanes bearing several different anions. The ammonium-type [2]rotaxanes behaved similarly to the purified [2]rotaxanes on the TLC silica gel. Furthermore, we succeeded in the analysis of anions using mixtures of the amine-type [2]rotaxane and salts in an appropriate solvent. We demonstrated the detection of anions by the combination of TLC and the utilization of the [2]rotaxane probe.
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