Abstract
A novel piperazine derivative (4, 4'-(1, 4-piperazinediyl) bis (4-oxo-2-butenoic acid),PBBA) was successfully synthesized under mild conditions by using piperazine and maleic anhydride as feedstock. Its molecular weight and structure were characterized through High-performance liquid chromatography-electrospray mass spectrometry (HPLC-EMS) and Nuclear magnetic resonance (NMR). Then its especial micrystal was also obtained by recrystallizing through co-precipitation in dimethyl sulfoxide-ethanol system. Scanning electron microscopy (SEM) and optical microscope revealed that the uniform shape microcrystal, which length ranging from 5 μm to 50 μm and width ranging from 2 μm to 15 μm, have unusual optical properties that lights only can be refracted through the middle of the microcrystal, maybe due to its special molecule structure.
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