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- Quantitative Study on the Lewis Base Property of MgO by Infrared Spectroscopy with Boric Acid Trimethyl Ester 硼酸三甲酯为探针红外光谱定量研究氧化镁的路易斯碱性
- Lewis Base Property 路易斯碱性
The Lewis base property of Al_2O_3 has been studied quantitatively with an infrared spectroscopic approach by using boric acid trimethyl ester (BATE) as the probe molecule. 采用硼酸三甲酯作为探针分子对Al2O3的路易斯碱性进行了红外光谱定量研究.- Study on the Determination of Boric Acid Trimethvl Ester to Lewis Base Properties of Metal Oxides by Using Infrared Spectrum 用红外光谱法测定硼酸三甲酯对金属氧化物的路易斯碱性的研究
- The results showed that MgO has a certain strength of Lewis base,and the adsorption of BATE on MgO is monomolecular chemical adsorption. 结果表明MgO有一定的路易斯碱强度,与硼酸三甲酯之间的吸附是单分子层化学吸附。
- There existed both Lewis acid sites(Fe~(3+),Mo~(6+)) and Lewis base sites(oxygen of Mo=O and Mo-O-Fe bond) on the surface of the catalysts. 催化剂表面由Lewis碱位(MoO键的端氧和Fe-O-Mo键中的桥氧)及Lewis酸位构成。
- FePO 4 and AlPO 4 distribute at intervals, and there exist Lewis base sites (P=O and P-O-Fe) and Lewis acid sites (Fe 3+ and Al 3+) on the catalyst surface. FePO4 和AlPO4 间隔分布在催化剂表面 ;形成Lewis碱位 (P =O ;P O Fe)和Lewis酸位 (Fe3 + ;Al3 + ) .
- Conseqently, the IGC is a simply &quick way of measuring the acid base property of polymers. 采用反相气相色谱法对氟硅橡胶表面的酸碱性质进行表征。
- The experimental results pointed out that the three kinds of active sites exist on the surface of the catalysts: Metallic site Cu, Lewis acid sites V~(5+) and Ti~(4+), Lewis base sites bridge O in V-O-Ti and terminal O in V=O. 实验结果表明:在Cu/V2O5-TiO2催化剂表面存在金属位Cu、Lewis酸位V5+和Ti4+以及Lewis碱位V-O-Ti的桥氧和V=O的端氧三类活性中心;
- Eight kinds of probe molecules have been selected to indicate acid base property of hydroxy terminated fluorosilicone oil by inverse gas chromatography(IGC). 采用 I G C法，选择8 种已知酸碱性的探针分子 ，表征羟基氟硅油的酸?碱性质。
- In the Lewis electron theory (see acid-base theory), advanced by Gilbert N.Lewis in 1923, nucleophiles are by definition Lewis bases. 在1923年由路易斯提出的电子理论中（参阅acid-base theory），亲核试剂是由路易斯定义的。
- Accordingly, clear curtilage base property right, make sure through measure of the market, law rural land is on the move effectively, safeguard farmer rights and interests, extremely urgent. 因此,明晰宅基地产权,通过市场、法律手段保证农村土地有效流转、保障农民权益,迫在眉睫。
- The guest speaker will be our old friend John Lewis. 特邀演讲者将是我们的老朋友约翰。路易斯。
- For the new object,gene heredity based property inheritance model was given to speedup the course of security management. 对于新建对象提出了基于基因遗传的属性继承模型来加速安全管理的进行;
- He was now in the measures of Lewis XIV. 他此刻正与路易十四共商大计。
- The acid base properties of fluorosilicone rubber(FSR) were studied by inverse gas chromatography(IGC) in detail. 采用反相气相色谱法对氟硅橡胶表面的酸碱性质进行表征。
- This paper introduces the complexation and dissociation of different Lewis bases with active species in the area of anionic polymerization reported in literatures and elucidates their applications. 介绍和评述了文献中有关路易氏碱在阴离子聚合中对活性中心的络合和解缔作用。
- Asymmetric Lewis Base Catalysis in Hydrogen Transfer Reduction 手性路易斯碱催化的不对称氢转移还原反应
- It was adapted from a novel by Sinclair Lewis. 它是根据辛克莱·刘易斯的一部小说改写的。
- The runner was retired put out at first base. 跑垒者于第一垒上被刺杀出局。
