共查询到19条相似文献,搜索用时 328 毫秒
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芳醛与芳胺的缩合反应及产物的倍频效应 总被引:5,自引:0,他引:5
三种芳醛与芳胺缩合,合成了14个希夫碱化合物,讨论了催化剂、空间效应对缩合反应的影响。测试了14个希夫碱的紫外-可见吸收曲线及SHG效应,发现有一个化合物有倍频效应,并讨论了取代基对λmax及Δλ1/2max的影响 相似文献
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查尔酮系化合物的合成及SHG效应 总被引:3,自引:0,他引:3
合成了22个查尔酮系化合物,测试了它们的吸收光谱,其中19个化合物的最高吸收λmax小于400nm。采用固体粉末法测试了合成产品的SHG效应,发现13个品种具有SHG活性。 相似文献
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合成了22个查尔酮系化合物,测试了它们的吸收光谱,其中19个化合物的最高吸收λmax小于400nm。采用固体粉末法测试了合成产品的SHG效应,发现13个品种具有SHG活性. 相似文献
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含手性原子硝基苯胺衍生的的合成及SHG效应 总被引:4,自引:0,他引:4
有机非线性光学材料具有SHG活性高,响应时间快,分子结构可变性等优点。合成了20个含不对称原子氨基酸取代的苯系化合物,测试了这些化合物的旋光度。紫外一可见吸收,SHG效应,发现17个化合物具有SHG活性,初步探讨了影响SHG效应的有关因素。 相似文献
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对硝基苯胺衍生物的合成及SHG效应 总被引:4,自引:0,他引:4
合成了十个对硝基苯胺衍生物,其中4个化合物含有手性原子。测试了它们的旋光度、和吸收光谱,含手性原子的化合物均有旋光值,十个合成产品的最高吸收波长在307 ̄390nm之间。采用固体粉末法测试了合成化合值的SHG效应,其中五个品种具有SHG活性。 相似文献
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《合成材料老化与应用》2017,(6)
简要介绍了希夫碱的产生、发展、性能、应用及结构特征。详细综述了:(1)新型希夫碱化合物的合成及在传感器科学中的应用;(2)新型希夫碱化合物的合成及在分析分离科学中的应用;(3)新型希夫碱化合物的合成及与甲醇不对称加成机理研究。并对希夫碱化学的发展进行了展望。 相似文献
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L—半胱氨酸希夫碱及其铜,锌配合物的合成及表征 总被引:1,自引:0,他引:1
报道了由L-半胱氨酸与2,4-二羟基苯甲醛合成希夫碱N-2,4-二羟基苯甲醛-L-半胱氨酸(简称SCYS),并与过渡金属Cu(Ⅱ)、Zn(Ⅱ)形成配合物(简称SCYS-Cu、SCYS-Zn)。对所合成的化合物进行了组成及结构分析。结果表明,SCYS为NOS型三齿配体,配合物为四配位化合物。 相似文献
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Schiff bases are versatile compounds synthesized from the condensation of primary amino compounds with aldehydes or ketones. The high thermal of many Schiff base and their complexes were useful attributes for their application as catalysts in reactions involving at high temperatures. This thermal behavior of Schiff bases and their complexes was evaluated by TGA/DTG and DTA curves with mass losses related to dehydration and decomposition. This review summarizes the developments in the last decade for thermal analysis of Schiff bases. Therefore, synthesis of Schiff bases and their complexes are reviewed. 相似文献
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Nabel A. Negm Ismail A. Aiad Salah M. Tawfik 《Journal of surfactants and detergents》2010,13(4):503-511
Eight novel uracil-based cationic surfactants containing Schiff base species were synthesized and characterized using elemental
analysis, FTIR, 1H-NMR and 13C-NMR spectroscopy. The surface activities of the synthesized Schiff bases and their cationic derivatives were determined
based on interfacial tension measurements and partition coefficient values in water/octanol system. The synthesized Schiff
bases and their cationic derivatives were evaluated as novel biocides against different bacteria and fungi strains. The results
showed that the biocidal activity of the synthesized Schiff bases was considerably increased by quaternization. The influence
of the cationic surfactants as biocides was increased by increasing the hydrophobic chain length and the presence of the methoxy
groups. The biocidal activity was also increased by increasing the partition coefficient in water/octanol system. The structure
and surface activity/biocidal activity of the different compounds were discussed. 相似文献
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通过乙酰基二茂铁与两种杂环胺(4-氨基安替比林,2-氨基-5-巯基-1,3,4-噻二唑)缩合合成了两种含二茂铁基的Schiff碱(a、b),产率分别为85.8%和72.6%,并通过IR、1HNMR及元素分析对其结构进行了确证。最后,将合成出的两种Schiff碱分别对3种细菌(金黄色葡萄球菌、大肠杆菌、枯草芽孢杆菌)进行了初步抑菌实验,将其结果与非杂环类Schiff碱Fc-C(CH3)NC6H5=(c)的抑菌性能做了比较。结果表明,Schiff碱对上述3种细菌都有抑制作用,且抑菌效果随着Schiff碱浓度的增大而增强。此外,杂环类Schiff碱(a、b)对上述3种细菌的抑菌活性明显优于非杂环类Schiff碱(c)。 相似文献
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Fatma H. Abdel-Salam 《Journal of surfactants and detergents》2010,13(4):423-431
A novel series of anionic Schiff base amphiphiles were synthesized. The chemical structures of these compounds were elucidated
using different spectroscopic tools. The surface and thermodynamic properties of the prepared Schiff bases were studied using
classical measurements including surface and interfacial tensions. The surface parameters of these compounds, e.g., surface
tension, critical micelle concentration, effectiveness, efficiency, maximum surface excess, minimum surface area, and interfacial
activity showed their good surface activity. Their thermodynamic parameters of adsorption and micellization including free
energy change of micellization and adsorption showed their tendency toward adsorption at the interfaces and also micelle formation
at lower concentrations. The complexation behavior of the synthesized Schiff bases were study through the interaction of the
Schiff base (IIIa; SBSD) with nickel chloride hexahydrate. All synthesized compounds in addition to NiCl2·6H2O and Ni Schiff Base complex have been evaluated for their antibacterial activity against Gram-positive and Gram-negative
bacteria. The results of the biocidal activities showed high potent action of (Ni-IIIa; Ni-SBSD) complex more than Schiff base IIIa; SBSD. 相似文献