N. Rajput, M. A. Moghal, A. Moghal, K. Khan, A. Balouch, Kanwal Kanwal
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引用次数: 2
摘要
本文研究了通过聚合法制备新制备的希夫碱BHNMXD和希夫基树脂PMBHNMXD。用甲醛(HCHO)在70 ~ 80℃条件下缩聚2 ~ 3 h,将制备的希夫碱BHNMXD及其相应的树脂pmbhnmxd从甲醇中再结晶得到纯树脂。席夫碱合成成功后,树脂通过不同的仪器技术进行了表征,如;CHN、元素微量分析、Schiff基树脂热重分析(TGA)、能量色散x射线能谱、EDS质谱、e - i - ms(电子冲击电离)、1HNMR谱和MALDI-TOF质谱等清楚地研究了合成化合物的分子量和结构信息。PMBHNMXD树脂在1632 cm-1处有较强的吸收带,证实了该化合物的形成。扫描电镜分析表明,希夫碱和树脂的形貌呈纵向球形粗糙,具有刚性和刚性结构。通过x射线衍射对其结构和组成进行了细致的研究,对希夫碱及其树脂进行了结晶学鉴定,证实其为单斜晶型。这些活性物质对黄曲霉(Aspergillus Flavus, G-ve)、白色念珠菌(Candida white bicans, G-ve)和黑曲霉(Aspergillus Niger, G-ve)的生长均有良好的抑菌效果。
Synthesis, Crystallographic, Monoclinic, Inflexible, Antifungal Assessment of Schiff based resin
The present study investigates the preparation of a newly prepared Schiff base BHNMXD and Schiff based resin PMBHNMXD via polymerization. The condensation or polymerization procedure was used with formaldehyde (HCHO) at temperature 70 to 80 ˚C for 2-3 h. The prepared Schiff base BHNMXD and its respective resinPMBHNMXD were recrystallized from methanol to attain pure resin. After successful synthesis of Schiff base and resin was characterized by different instrumental techniques such as; CHN, elemental microanalysis, thermogravimetric analysis (TGA) studies of Schiff based resin, energy- dispersive x-ray spectroscopy EDS mass spectrometry, E.I-MS (electron impact ionization), 1HNMR spectroscopy and MALDI-TOF mass spectrometry clearly investigated the molecular weight and structural information of synthesized compounds. The FT-IR spectra of resin PMBHNMXD showed stronger absorption band at 1632 cm-1 of azomethine >C=NH confirming the compound formation. The SEM analysis showed the morphology of Schiff base and resin showing, longitudinal spherical rough, inflexible and rigid structure. The structures and components were carefully investigated by X-ray diffraction .The crystallographic evaluation of Schiff base and its resin, aproved the monoclinic sharp crystalline structure. These active materials have shown high efficiency against the antifungal growth of Aspergillus Flavus (G-ve), Candida albicans (G-ve) and Aspergillus Niger (G-ve),by agar well diffusion method.