Synthesis, Characterization and Optical Properties of a Novel Piperazine Derivative Microcrystal
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.
Jianmin Zeng, Taosen Li, Shaojian Ma, Zhengyi Jiang and Daoguo Yang
C. S. Ruan et al., "Synthesis, Characterization and Optical Properties of a Novel Piperazine Derivative Microcrystal", Advanced Materials Research, Vols. 194-196, pp. 708-711, 2011