科研之友
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摘要
We report a novel air-flow impacting method for mechanochemical synthesis. It is an alternative approach for conventional mechanochemical synthesis. The feasibility of this method was demonstrated via the preparation of three Schiff bases containing N,N'-bis(m-nitrobenzylidene)-p-phenylenediamine (compound 1), N,N'-bis(2-hydroxy-1-naphthylmethylene)-p-phenylenediamine (compound 2), and polymeric Schiff base as the model compounds. The as-prepared Schiff bases were characterized by Fourier transform infrared spectroscopy, powder X-ray diffraction, differential thermal analysis, nuclear magnetic resonance, ultraviolet-visible (UV-vis) spectroscopy, and single crystal X-ray diffraction. All the results indicated that two bis-schiff bases were successfully synthesized after 3 min at the rate of 1.5 kg min(-1). In addition, kinetic analysis was carried out to study the reaction mechanisms by detecting the UV-vis spectra of the products at different reaction times. It was found that the preparation of compound 1 belonged to the two-dimensional diffusion-controlled model, while the synthesis of compound 2 is the two-dimensional diffusion-controlled product growth following deceleratory nucleation.
- 出版日期2016-4
- 单位中国空气动力研究与发展中心; 西南科技大学
