查询词典 Salen

Two new chiral salen-manganese complexes were synthesized and employed in the enantioselective epoxidation of indene in the presence of pyridine N-oxide and ammonium acetate as cocatalysts, respectively.

合成了两个新型的手性salen-manganese配合物，在分别以吡啶氮氧化物和醋酸铵为助催化剂的条件下，运用于催化茚的不对称环氧化反应。

Molecular mechanics was introduced into the field of molecular recognition of chiral SalenZn for the first time. The minimal energy conformations of host-guest system were obtained with Tripos force field. The difference of the energy of L and D-amino acid esters system was mostly attributed to the difference of electrostatic energy.

首次将分子力学的方法引入手性Salen金属配合物的识别研究体系，用Tripos力场研究了主体Salen-Zn与氨基酸酯缔合后的体系最低能量构象，分析了L、D型两个体系能量差异的主要来源，即分子识别的主要根源是静电能的差异。

B. Three novel dimeric dissymmetric chiral ligands and six chain binuclear Salen complexes were synthesized and characterized by FT-IR,〓HNMR, Elemental analyses, UV-vis, furthermore the CD spectra properties of the ligands and complexes were discussed in detail for the first time.

合成了三个未见报道的链式双Salen配体和六个链式双核Salen金属配合物，通过核磁共振波谱、元素分析、红外光谱、紫外-可见光谱进行了表征，并首次详讨论了手性配体及配合物的圆二色光谱性质。

Quantum chemical calculations were performed based on these conformations to explain the experimental data. 4. The molecular recognition of the chiral Salen Fe complexes towards imidazole derivatives and the measure of the equilibrium constants of host-guest system of the Salen Fe and EMIm a.

用紫外-可见光谱滴定法考察了不同主体Salen-Fe对咪唑及其衍生物的分子识别行为，测定了识别过程的平衡常数和热力学参数，讨论了影响主客体配位能力的有关因素；系统地考察了主客体缔合反应的圆二色光谱性质。

Four new salicylaldehyde derivatives with a glucose or mannose moiety were synthesized with 2-tert-butylphenol or 4-tert-butylphenol as the starting material, followed by the formylation, chloromethylation, nucleophilic substitution reaction with the desired carbohydrate. The salicylaldehyde derivatives condensed with ethylenediamine to give the Schiff bases, which coordinated with Mn to afford four novel sugar-based Salen Mn complexes.

首先，分别以2-叔丁基苯酚和4-叔丁基苯酚为起始原料，经过甲酰化反应、氯甲基化反应、和糖类衍生物的亲核取代反应制得了四种新型并入葡萄糖基或甘露糖基的水杨醛衍生物，将它们与乙二胺缩合生成希夫碱配体，得到的配体与过渡金属Mn~(3+)配位制备出四种新型含糖基的Salen Mn配合物。

On the base of structure and constitute analysis of organic chromium of nicotinate chromium and 〓, which all have evidently biological function, it reports the preparation of the first type of four kinds new organic chromium complexes . H〓O,. H〓O,,, in which Salen schiff base ligand and nicotinate or isonicotinate, or pyromucate, or benzoate ligand are contained simultaneously.

根据具有明显生物学功能的有机铬——烟酸铬和〓配合物的组成及结构特征，合成了第一类四种含有希夫碱Salen配体和烟酸、异烟酸、呋喃甲酸和苯甲酸的有机铬，其组成分别为。H〓O，。H〓O，，。

In this thesis, two synthetic routes for the incorporation of sugar moiety into C5(5") or C3(3") of salicylaldehyde part of Salen Mn complex were designed and several corresponding compounds were prepared, as carbohydrate derivatives are widely used in asymmetric catalytic reactions.

鉴于糖类衍生物在不对称催化反应中的广泛应用，设计了两条分别在Salen Mn配合物水杨醛部分C5(5′)、C3(3′)位并入糖基的路线并合成了相应的化合物。

In one embodiment, the first and second dyes are from the group comprising porphyrin, chlorin, chlorophyll, phthalocyanine, or salen.

在一个实施方案中，第一种染料和第二种染料选自卟啉、二氢卟酚、叶绿素、酞菁染料或salen。

Heterogeneous Salen-Mn catalyst was prepared by chemical linkage and sol-gel entrapping method. The catalyst and its precursor were characterized by means of FT-IR, UV-vis and 1H NMR.

采用化学键联和溶胶－凝胶相结合的方法制备锚链固定的多相化Salen-Mn催化剂，利用FT-IR，UV-vis，1H NMR等方法对催化剂及其前体进行表征。

The aerobic oxidation of styrene to its epoxide catalysted by Salen-Mn complex was studied.

研究了Salen-Mn配合物催化空气环氧化苯乙烯的反应。

According to the clear water experiment, aeration performance of the new equipment is good with high total oxygen transfer coefficient and oxygen utilization ratio.

曝气设备的动力效率在叶轮转速为120rpm～150rpm时取得最大值，此时氧利用率和充氧能力也具有较高值。

The environmental stability of that world - including its crushing pressures and icy darkness - means that some of its most famous inhabitants have survived for eons as evolutionary throwbacks, their bodies undergoing little change.

稳定的海底环境─包括能把人压扁的压力和冰冷的黑暗─意谓海底某些最知名的栖居生物已以演化返祖的样态活了万世，形体几无变化。