共查询到20条相似文献,搜索用时 312 毫秒
1.
杯芳烃是一类由苯酚单元通过亚甲基桥连的超分子化合物,具有独特的主客体识别性能,是继冠醚和环糊精之后第三代超分子化合物的主要代表。其被广泛应用于离子通道、有机催化反应、跨膜转运、纯化、色谱分离等方面。基于杯芳烃易于修饰的特点,选取不同性质的化合物进行衍生化,可以制备出具有不同识别能力和高选择性的杯芳烃衍生物,进而应用于不同色谱分离模式,可实现复杂样品的分离分析。该文从杯芳烃、杯芳烃衍生物和杯杂芳烃3个方面综述了近年来杯芳烃在液相色谱固定相方面的研究应用及进展,并对杯芳烃在色谱分离领域的发展提出了展望。 相似文献
2.
杯芳烃是由对叔丁基苯酚经亚甲基2,4-位桥联的一类大环多羟基化合物,被誉为继冠醚和环糊精之后第三代有特色的主体分子,引起了许多化学学者的研究兴趣.杯芳烃在相转移催化、物质分离、制作分子器件等方面有着广泛的应用前景[1]. 相似文献
3.
4.
5.
杯[4]芳烃在毛细管电泳中的应用研究 总被引:5,自引:0,他引:5
最近,杯芳烃在分离科学中的应用研究激起了人们的很大兴趣.在液相色谱中,固载化的杯芳烃被用作固定相,对金属离子和氨基酸酯的盐酸盐进行了分离[1].在气相色谱中,钟振林等[2]评价了主链含杯芳烃的聚硅氧烷作为毛细管固定相的性能.杯芳烃在毛细管电泳中的应用仅见1篇应用杯「6]芳烃的报道[3].本文首次报道杯卜[4]芳烃在毛细管电泳中的应用.鉴于毛细管电泳一般在水介质中进行,本文合成了水溶性的磺化杯卜[4]芳烃,并将其作为毛细管电泳添加剂来分离硝基苯酚异构体,获得满意的结果.1仪器和试剂Spectra-Phoresis1000型毛细管电泳… 相似文献
6.
7.
8.
9.
10.
大环杯芳烃冠醚的研究现状与展望 总被引:2,自引:3,他引:2
杯芳冠醚是杯芳烃化学中最令人瞩目的研究热点之一。本文综述了大环杯[5,6,8]芳冠醚的合成、构象固定、衍生化以及它们的识别性能等方面的研究进展。并对其发展前景作了展望。参考文献25篇。 相似文献
11.
12.
S. V. Blokhina M. V. Ol’khovich A. V. Sharapova 《Russian Journal of Physical Chemistry A, Focus on Chemistry》2010,84(2):299-303
The reverse phase gas chromatography technique was used to determine the activity coefficients of butanol isomers at infinite
dilution in the smectic, cholesteric and isotropic phases of cholesteryl tridecylate. Experimental parameters with which the
chromatographic process may be viewed as balanced and proceeding within the bulk of the liquid crystal were defined. Alcohol
activity coefficients in binary systems with cholesteryl tridecylate determined by the gas chromatographic and tensiometric
techniques were found to be in good agreement. A conclusion is reached on the suitability of the reversed-phase gas chromatographic
technique for studying smectic and cholesteric liquid crystalline phases. 相似文献
13.
14.
一类新的毛细管气相色谱固定液—侧链液晶冠醚聚硅氧烷的研究 总被引:7,自引:0,他引:7
合成了一种新的毛细管气相色谱用固定液——侧链含冠醚液晶的聚硅氧烷,这种固定液易于涂渍在弹性石英毛细管柱上,柱效高,热稳定性好,极性中等,它具有高分子液晶和高分子冠醚固定液的双重保留性能,适于分离多种异构体。 相似文献
15.
A new carbon nanotube porous silica poroshell stationary phase was developed. The chromatographic support was coated with ultrashort single-wall carbon nanotubes (SWCNTs) in a noncovalent way. It was demonstrated that the porous amino silica surface of the 300 NH2 poroshell column stabilized with 1-methyl-2-pyrrolidinone efficiently and stably adsorbed SWCNTs onto the chromatographic support. It was shown that this novel poroshell carbon nanotube (CNT) stationary phase was very useful for the HPLC separation of a series of monoclonal antibodies (mAbs) in a short analysis time (<3 min). The high-performance liquid chromatography (HPLC) method was validated and was successfully tested for the fast quantitative and qualitative control of chemotherapeutic bags fabricated in a hospital pharmacy. 相似文献
16.
T. Cserháti 《Biomedical chromatography : BMC》2009,23(2):111-118
The newest results in the employment of carbon‐based composites in various chromatographic techniques such as gas–liquid chromatography, high‐performance liquid chromatography and electrically driven separation techniques for the separation, quantitative determination and identification of a wide variety of compounds in complicated matrices are compiled. The results are concisely described and critically evaluated. The future trends in the application of carbon‐based compounds in the chromatographic separation methods are briefly discussed. Copyright © 2008 John Wiley & Sons, Ltd. 相似文献
17.
An overview of the most significative results so far attained in the application of carbon nanotubes, fullerenes and nanodiamonds as chromatographic separation media is presented. In particular, the authors focus on their use in capillary and packed-column gas chromatography, in high performance liquid chromatography and capillary electrochromatography, paying also attention to recently developed stationary phases for fast chromatography and nanochromatography. The performance of the nanomaterials is compared to that of planar and amorphous carbon sorbents and critically discussed in regard to retentive capability and selectivity. A wide part of this review is devoted to the most recent improvements achieved in terms of selectivity by use of functionalized nanotubes and by combination of carbon nanotubes with ionic liquids. Practical aspects of synthetic procedures in preparing novel stationary phases in relationship with their chromatographic behaviour are also commented. 相似文献
18.
《Journal of separation science》2017,40(17):3545-3556
A comparison of ultra high performance supercritical fluid chromatography, ultra high performance liquid chromatography, and gas chromatography for the separation of synthetic cathinones has been conducted. Nine different mixtures of bath salts were analyzed in this study. The three different chromatographic techniques were examined using a general set of controlled synthetic cathinones as well as a variety of other synthetic cathinones that exist as positional isomers. Overall 35 different synthetic cathinones were analyzed. A variety of column types and chromatographic modes were examined for developing each separation. For the ultra high performance supercritical fluid chromatography separations, analyses were performed using a series of Torus and Trefoil columns with either ammonium formate or ammonium hydroxide as additives, and methanol, ethanol or isopropanol organic solvents as modifiers. Ultra high performance liquid chromatographic separations were performed in both reversed phase and hydrophilic interaction chromatographic modes using SPP C18 and SPP HILIC columns. Gas chromatography separations were performed using an Elite‐5MS capillary column. The orthogonality of ultra high performance supercritical fluid chromatography, ultra high performance liquid chromatography, and gas chromatography was examined using principal component analysis. For the best overall separation of synthetic cathinones, the use of ultra high performance supercritical fluid chromatography in combination with gas chromatography is recommended. 相似文献
19.
Roya Mohammadzadeh Kakhki 《Journal of inclusion phenomena and macrocyclic chemistry》2013,75(1-2):11-22
Recently, much attention has been paid to chromatographic characteristics and applications of crown ethers. These compounds were employed as chiral stationary phase for resolution of various racemic compounds in high performance chromatography and capillary electrochromatography techniques. Crown ethers also used in gas chromatography as the stationary phase. Recently, it has been found that, crown ethers also may be useful in cation chromatographic separation in ion chromatography for the determination of alkali and alkaline-earth cations, ammonium, and amines. In this paper we have an overview on these applications of crown ethers. 相似文献
20.
The objective of this article is to provide an overview and critical evaluation of the use of carbon nanotubes and related carbon-based nanomaterials for microchip chromatography. The unique properties of carbon nanotubes, such as a very high surface area and intriguing adsorptive behaviour, have already been demonstrated in more classical formats, for improved separation performance in gas and liquid chromatography, and for unique applications in solid phase extraction. Carbon nanotubes are now also entering the field of microfluidics, where there is a large potential to be able to provide integrated, tailor-made nanotube columns by means of catalytic growth of the nanotubes inside the fluidic channels. An evaluation of the different implementations of carbon nanotubes and related carbon-based nanomaterials for microfluidic chromatography devices is given in terms of separation performance and ease of fabrication. 相似文献