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meso—四(对烷氧苯苯基)卟啉金属配合物的合成和性能研究(Ⅲ) 总被引:3,自引:1,他引:2
合成了Ni系列列卟啉金属配合物10个,其中6个为未见献报道的新化合物,用元素分析、IR、UV、^1H NMRMS确证了其结构。总结了Ni与卟啉类配体配合物IR、UV、^1H NMR判据。研究了该系列化合物的液晶性能,发现5个化合物具有液晶性。考察了烷基链长及配合物金属离子对液晶性能的影响,发现带有10个碳原子以上的烷氧基链的配合物具有液晶性。 相似文献
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教材中的学习设计是指教材在体现学生学习理论和指导学生学习策略方面的技术路径和呈现方式.基于学习心理学从体现学习理论和指导学习策略两个维度建构了分析教材学习设计的指标体系,通过对人教版高中物理新教材必修1中学习设计的分析,发现教材在多个方面体现了学习理论与学习策略. 相似文献
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以壳聚糖为载体对醇脱氢酶(ADH)和脲酶(UASE)进行固定化。固定化的最适条件:ADH和UASE的偶联时间分别为2.5h和1.5h,交联剂戊二醛浓度为0.6%和0.5%,偶联pH值为6.8和5.0。对游离酶及固定化酶的性质研究表明,ADH酶促反应的最适宜pH为8.0和8.4,最适宜温度为33℃和35℃,米氏常数为48mmol/L和13mmol/L;UASE酶促反应的最适宜pH均为7.0,最适宜温度为60℃和72℃,米氏常数为0.4mmol/L和2mmol/L。固定化酶与游离酶相比在复用性上具有优势,用固定化酶测定了试样中尿素含量以及模拟样中银离子含量。 相似文献
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Based on laser radar equations, a Doppler shift model of a laser pulse beam scattered by a rotating arbitrary convex target is reported in this paper. The boundary relations between an incident pulse beam and the detected area elements are analyzed by geometric methods. The Doppler shift characteristics of the rotating cone and cylinder are discussed and the difference between the laser pulse beam and the plane wave scattered from the same rotating target is compared accordingly. Numerical simulations show that the Doppler shift is tightly relevant to their dimensions, speeds, and so on. In the same incidence conditions, the pulse beam and plane wave have difference peak values and the same Doppler shift bandwidth. If the waist radius of the pulse beam is larger, the peak value is higher, and the Doppler shifts are proportional to the speed of the rotating target. By virtue of our theoretical model, we probe into the scattered characteristics of the Doppler shifts of a laser pulse beam, which would benefit target identification in national defense. 相似文献
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meso-四(间烷氧基苯基)卟啉及其铜配合物的合成、 表征和性能研究 总被引:5,自引:0,他引:5
设计合成了meso-四(间烷氧基苯基)卟啉及其19个铜配合物, 其中16个为未见报道的化合物. 研究了其合成、分离、纯化方法, 得到了这两个系列化合物的晶体或固体, 其结构经 1H NMR, MS, IR, UV和元素分析确证. 研究了这两个系列化合物的液晶性能, 发现13个化合物具有液晶性, 其液晶行为表现为升温单变液晶. 还研究了烷氧基链长、金属离子和分子空间结构对卟啉化合物液晶性能的影响. 相似文献
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中位-四(对烷氧苯基 )卟啉 Co2+、Cu2+、Zn2+、Pb2+配合物的合成与表征 总被引:1,自引:0,他引:1
Synthesis of fourteen new complexes of meso-tetrakis(4-alkoxyphenyl) porphyrins with Co2+, Cu2+, Zn2+, Pb2+ were presented in this paper.Meso-tetrakis (4-alkoxyphenyl) porphyrins were prepared by condensation of 4-alkoxybenzaldehydes with pyrrole, then treated with corresponding metallic acetate to produce mentioned complexes, IR, UV, 1H NMR, MS and elementary analysis were explored to confirm the structures of all theses new complexes.Characteristic spectrometric data of IR, UV, 1H NMR related to these complexes have been systematically summarized.Ten of the fourteen complexes were found to exhibit liquid crystal properties. 相似文献
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