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联接基团
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  spacer group
     3. The emulsification capability of Gemini surfactants was investigated and compared with traditional surfactants. It was found that emulsification capability is increasing with spacer group being shorter and Gemini A1 has the best emulsification capability.
     3.研究了Gemini表面活性剂的乳化能力相比于传统表面活性剂,其联接基团越短,乳化能力越强,并发现Gemini A1的乳化能力最强;
短句来源
     The motion of the molecules are relatively more restricted than their monomeric homologue CTAB. 2D NOESY experiments show cross peaks between the protons in or close to the spacer group.
     2DNOESY谱显示联接基团及临近的碳氢链的质子间有较强的交叉峰,表明形成胶束时,分子在联结基团附近堆积的较为紧密.
短句来源
  “联接基团”译为未确定词的双语例句
     (2) The values of critical micelle concentration (CMC) decrease and the micelle ionization degree (a) increase when the the number of carbon (S) of the spacer increase for C12CsC12Br2 sieries Gemini surfactants.
     (2) 对于Gemini表面活性剂C_(12)C_sC_(12)Br_2来说,随着联接基团spacer碳原子个数的增加,临界胶束浓度(CMC)变小,胶束离子化度增大。
短句来源
     4 The micelle aggregation numbers were measured by the technique time-resolved fluorescence quenching (TRFQ) and fluorescence polarization. The concentration of quaternary-ammonium Gemini surfactants has great influences on the micelle aggregation number.
     4采用荧光探针技术测定了两个系列的Gemini表面活性剂的胶团聚集数,发现阳离子Gemini表面活性剂的浓度强烈影响其胶团聚集数,尤其是对于较短联结基团,联接基团越短,其胶团聚集数越大。
短句来源
     1. The aggregates of DTAB/C11pPHCNa mixture (CT=12mmol·L-1, R=4.5:1) transformed from vesicles to worm-like aggregates and finally precipitation when the pH of the aqueous solution decreased, which was attributed to the hydrolysis of the carboxylate head of C11pPHCNa.
     4. C11pPHCNa的反式构象对于多层囊泡的形成起着重要作用,C11pPHCNa联接基团上的苯环与DTAB的季铵阳离子之间存在的阳离子-π相互作用稳定了囊泡的多层结构;
短句来源
     The Influences of the Spacer of Gemini Surfactants on the Structure of Silicic Mesoporous Materials
     Gemini表面活性剂联接基团对合成硅基介孔材料结构的影响
短句来源
     The results of many previous studies indicate that the length and the structure of the spacer play the most important roles in determining the surface activities of Gemini surfactant.
     多年来的研究结果表明,联接基团的结构和长度对双子表面活性剂的活性影响最大.
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  相似匹配句对
     Group Electronegativity
     基团电负性
短句来源
     Determination of Critical Micelle Concentration of Gemini Surfactants by Self Chromophore Reside in the Spacer
     利用Gemini联接链上生色基团测定临界胶团浓度
短句来源
     The Calculation of the Group Electronegativities
     基团电负性的计算
短句来源
     The Influences of the Spacer of Gemini Surfactants on the Structure of Silicic Mesoporous Materials
     Gemini表面活性剂联接基团对合成硅基介孔材料结构的影响
短句来源
     Research on reliability of bolt connection
     螺栓联接的可靠性研究
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  spacer group
N,N-dimethyldodecylamine, hydrochloride and epichlorohydrin (molar ration is 2:1:1) were used to synthesize bis-quaternary ammonium Gemini surfactant with a hydroxyl in its spacer group by the one-pot method.
      
The bases were attached to the glycerol backbone either directly (piperazine) or via a spacer group through a thioether bond.
      
Synthesis of Cationic Cholesterol Derivatives with Succinyl Spacer Group
      
The results show that the linkage mode of the spacer group to the bipyridine units exerts a great impact on the formation of helix.
      
the length of spacer group, and the flexibility of chain is also described.
      
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In researching the electronic spectrum of CT complex from the point of view of structural effect, it has been found that there is a good linear relationship between the energy of spectrum and the inductive index of groups attached to central atom of donor in n-σ CT complex. Using the electronic spectrum data in literature and calculating the inductive index of groups attached to central atom of donor by Chiang-Dai formula to investigate 9 series of CT complexes, it has been found that the relative coefficients...

In researching the electronic spectrum of CT complex from the point of view of structural effect, it has been found that there is a good linear relationship between the energy of spectrum and the inductive index of groups attached to central atom of donor in n-σ CT complex. Using the electronic spectrum data in literature and calculating the inductive index of groups attached to central atom of donor by Chiang-Dai formula to investigate 9 series of CT complexes, it has been found that the relative coefficients for all series are greater than 0.94.

从结构效应的角度来研究电荷转移络合物的电子吸收光谱,发现n—σ类型的电荷转移络合物其电子吸收光谱的能量与给体中心原子上所联接的基团的诱导效应指数Ⅰ_R,之间,有良好的线性关系。应用文献中的光谱数据,并用蒋一戴公式计算给体中心原子上所联基团的诱导效应指数,研究了9个系列的电荷转移络合物,其电子吸收光谱的能量与诱导效应指数间的相关系数均在0.94以上。

Gemini surfactant systems are investigated by the surface tension measurement.The results reveal that the gemini surfactants have much higher surface activity than general surfactants.The surface activity of gemini surfactants strongly depends on the structure of their spacer groups.The surface activity is greatly enhanced when the cationic gemini surfactant is mixed with the general anionic surfactant compared with the general anionic/cationic surfactant system.High synergism is found when combining the gemini...

Gemini surfactant systems are investigated by the surface tension measurement.The results reveal that the gemini surfactants have much higher surface activity than general surfactants.The surface activity of gemini surfactants strongly depends on the structure of their spacer groups.The surface activity is greatly enhanced when the cationic gemini surfactant is mixed with the general anionic surfactant compared with the general anionic/cationic surfactant system.High synergism is found when combining the gemini surfactant with the general surfactant.The special property of the gemini surfactant is due to the special molecular structure.

测定了阳离子型双子表面活性剂烷基 α ,ω 双二甲基烷基溴化铵以及它与普通表面活性剂复配体系的表面张力。结果表明 :双子表面活性剂的表面活性大大高于普通表面活性剂 ,双子表面活性剂溶液的表面活性受其联接基团的影响远大于其烷基链的影响。通过研究阳离子型双子表面活性剂 /阴离子普通表面活性剂复配体系和阴 /阳普通表面活性剂复配体系的协同效应 ,发现双子表面活性剂与普通表面活性剂有很好的复配协同效应 ,这主要是由双子表面活性剂的特殊结构造成的。

Oligomeric surfactants are made up of two identical amphiphilic moieties covalently connected at the level of the headgroups by a spacer group.The distance between the headgroups in oligomeric surfactant can be controlled through designing and synthesizing different lengths in the spacer groups.This implies a change in the shape and in the density of alkyl chains of the surfactant molecule,and also in the charge density of the ionic headgroups and their gydration,which should directly affect their aggregates.The...

Oligomeric surfactants are made up of two identical amphiphilic moieties covalently connected at the level of the headgroups by a spacer group.The distance between the headgroups in oligomeric surfactant can be controlled through designing and synthesizing different lengths in the spacer groups.This implies a change in the shape and in the density of alkyl chains of the surfactant molecule,and also in the charge density of the ionic headgroups and their gydration,which should directly affect their aggregates.The article elaborates the idea of controlling order-aggregate by design and synthesis of oligomeric surfactants with different length in the spacer.

阐述当设计不同长短的联接基团链时可控制低聚表面活性剂单元分子内离子头基间的距离 ,这使单元分子的几何形状、头基电荷密度和水化程度及烷烃链密度发生变化 ,单元分子的这些变化直接影响低聚表面活性剂分子聚集体的状况 ,从而实现从分子结构水平上调控其分子有序聚集体的形状和表面电荷密度。

 
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