【摘 要】
：
In this paper, separation of four neutral macrocyclic compounds (calix[4]pyrroles (C4Ps)-meso-octamethylealix [4]pyrrole (OMCP), meso-octaethylcalix[4]pyrro
【机 构】
：
Key Laboratory for Natural Medicine of Gansu Province, Lanzhou Institute of Chemical Physics, the Ch
【出 处】
：
DaLian Internationall Symposia and Exhibition on Chromatogra
论文部分内容阅读
In this paper, separation of four neutral macrocyclic compounds (calix[4]pyrroles (C4Ps)-meso-octamethylealix [4]pyrrole (OMCP), meso-octaethylcalix[4]pyrrole (OECP), meso-tetracyclopentylcalix[4]pyrrole (TPCP) and meso-tetracyclohexylcalix[4]pyrrole (THCP) by nonaqueous capillary electrophoresis (CE) with tetrabutylammonium fluroride (Bu4NF)and tetrabutylammonium chloride (Bu4NCl) salts as background electrolyte (BGE) is described.Fluoride anion and chloride anion can bind neutral C4Ps through 1∶1 chemical stoichiometry effectively and selectively by hydrogen bonding and adopt a negatively charged cone-like conformation [1,2].Only under this circumstances, C4Ps can be separated from each other by their size using CE.Fluoride anion appears to be more tightly bound than chloride anion, thus fluoride anion-C4P cone-like formation has smaller stokes radius than that of chloride anion.Fluoride anion can stabilize the calix-like structure of C4Ps more easily than chloride anion [3], hence fluoride anion can form ion pair more easily than chloride anion.
其他文献
With the advantages of high peak capacity, high resolution and high sensitivity, capillary isoelectric focusing (CIEF) has become a popular method for the s
A novel water-soluble β-CD derivatized erythromycin was synthesized and used as an effective chiral selector for resolution of chiral compounds in the capi
2-HPA is a new drug to cure the Parkinsons disease and only the R-isomer has the pharmacological activity.In order to separate 2-HPA we have tried many meth
突厥语族诸语言都遵循较严格的一致性规律。传统语法学者认为,这种一致性主要体现在句法层面上。本文在生成语法框架内以乔姆斯基探针与目标的关系为切入点,试图论证在维吾尔
处于前所未有的良好发展际遇的当下,中国画发展充满了活力。在蜕变和磨砺中,涌现出一批具有潜质的青年画家。活跃于海南艺术界的青年画家田耘,引起人们的关注。
At the mome
狂犬疫苗免疫是预防狂犬病的特异性预防措施,但孕妇被犬致伤后注射狂犬疫苗是否安全,使用说明书及各有关专著均未提及。对此,我们从1987年开始对被犬致伤的孕妇注射狂犬疫苗
In the post-genomic era, it is known that high speed digestion, high efficient separation, high sensitive characterization, high automated systems and high
With the completion of human genome sequencing, one of the challenges of proteomics is to separate and identify protein encoded by genomes with high resolut
SimonIsCoolIn Lab-on-a-Chip systems, Laser Induced Fluorescence (LIF) detection is still the most widely applied detection technique, and the high price of
If detection is well known to offer high sensitivity and is regularly used for the detection "on capillary" of a CE system.In this poster we will describe t