| Cation effects in the separation of calix[4]pyrroles by nonaqueous capillary electrophoresis with tetraalkylammonium chloride salts as background electrolytes | |
| Department | 甘肃省天然药物重点实验室 |
Ma HQ(马华侨); Luo MN(罗米娜); Shao SJ(邵士俊) ; Liu X(刘霞); Jiang SX(蒋生祥)
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| 2008 | |
| Source Publication | Journal of Chromatography A
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| ISSN | 0021-9673 |
| Volume | 1192Pages:180-186 |
| Abstract | The migration behavior of three calix[4]pyrroles (C4Ps) in acetonitrile (ACN) and in the mixtures of ACN/ethanol (EtOH) (95:5; v/v)with tetraalkylammonium chloride as background electrolyte (BGE) was studied. Electroosmotic flow (EOF) mobilities and absolute mobilities in ACN and mixture of ACN/EtOH (95:5; v/v) were investigated. A decrease of EOF mobilities in EtOH/ACN was observed compared with that of in pure ACN. Variation of the C4Ps effective mobilities as a function of the square root of concentration of tetraakylammonium chloride salts such as tetramethylammonium chloride (Me4NCl), tetraethylammonium chloride (Et4NCl) and tetrabutylammonium chloride (Bu4NCl) in both solvents was plotted, and straight lines were exhibited when Bu4NCl was used as BGE. Absolute mobilities of C4Ps were obtained by extrapolation from the mentioned plots. It was found that the absolute mobilities of C4Ps is independent of the nature of BGE and the values are: meso-octamethylcalix[4]pyrrole (OMCP) > meso-tetracyclopentylcalix[4]pyrrole (TPCP) > meso-tetracyclohexylcalix[4]pyrrole (THCP). The ion-pairing constants follow the order under given solvent: Me4N+ >Et4N+ >Bu4N+, and ion-pairing constant of C4P follows the order: THCP > TPCP >OMCP. As though, ion-pairing association is intensified by steric hindrance. |
| Keyword | Calix[4]Pyrrole Tetraalkylammonium Chloride Nonaqueous Capillary Electrophoresis Hydrogen-bond Effect Cation Effects |
| Subject Area | 分析化学与药物化学 |
| Funding Organization | the National Natural Science Foundation of China through the number 20527005 and 20775084. |
| Indexed By | SCI |
| Language | 英语 |
| Funding Project | 药物分离材料研究组 ; 药物分子识别研究组 |
| Citation statistics | |
| Document Type | 期刊论文 |
| Identifier | http://ir.licp.cn/handle/362003/1385 |
| Collection | 中科院西北特色植物资源化学重点实验室/甘肃省天然药物重点实验室 |
| Corresponding Author | Jiang SX(蒋生祥) |
| Recommended Citation GB/T 7714 | Ma HQ,Luo MN,Shao SJ,et al. Cation effects in the separation of calix[4]pyrroles by nonaqueous capillary electrophoresis with tetraalkylammonium chloride salts as background electrolytes[J]. Journal of Chromatography A,2008,1192:180-186. |
| APA | 马华侨,罗米娜,邵士俊,刘霞,&蒋生祥.(2008).Cation effects in the separation of calix[4]pyrroles by nonaqueous capillary electrophoresis with tetraalkylammonium chloride salts as background electrolytes.Journal of Chromatography A,1192,180-186. |
| MLA | 马华侨,et al."Cation effects in the separation of calix[4]pyrroles by nonaqueous capillary electrophoresis with tetraalkylammonium chloride salts as background electrolytes".Journal of Chromatography A 1192(2008):180-186. |
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