Nanocellulose Derivative/Silica Hybrid Core-Shell Chiral Stationary Phase: Preparation and Enantioseparation Performance
作者:Xiaoli Zhang、Litao Wang、Shuqing Dong、Xia Zhang、Qi Wu、Liang Zhao、Yanping Shi
DOI:10.3390/molecules21050561
日期:——
Core-shell silica microspheres with a nanocellulose derivative in the hybrid shell were successfully prepared as a chiral stationary phase by a layer-by-layer self-assembly method. The hybrid shell assembled on the silica core was formed using a surfactant as template by the copolymerization reaction of tetraethyl orthosilicate and the nanocellulose derivative bearing triethoxysilyl and 3,5-dimethylphenyl groups. The resulting nanocellulose hybrid core-shell chiral packing materials (CPMs) were characterized and packed into columns, and their enantioseparation performance was evaluated by high performance liquid chromatography. The results showed that CPMs exhibited uniform surface morphology and core-shell structures. Various types of chiral compounds were efficiently separated under normal and reversed phase mode. Moreover, chloroform and tetrahydrofuran as mobile phase additives could obviously improve the resolution during the chiral separation processes. CPMs still have good chiral separation property when eluted with solvent systems with a high content of tetrahydrofuran and chloroform, which proved the high solvent resistance of this new material.
通过逐层自组装方法,成功制备了在混合壳中具有纳米纤维素衍生物的核壳硅微球作为手性固定相。在硅核上组装的混合壳是通过表面活性剂作为模板,通过正硅酸四乙酯与带有三乙氧基硅烷基和3,5-二甲基苯基的纳米纤维素衍生物的共聚反应形成的。对所得的纳米纤维素混合核壳手性填料(CPMs)进行了表征并装入色谱柱,通过高效液相色谱法评估了其手性分离性能。结果表明,CPMs具有均匀的表面形貌和核壳结构。在正相和反相模式下,各种类型的手性化合物均被有效地分离。此外,作为流动相添加剂的氯仿和四氢呋喃可以明显提高手性分离过程中的分辨率。当用四氢呋喃和氯仿含量高的溶剂体系洗脱时,CPMs仍然具有良好的手性分离性能,这证明了这种新材料具有很高的耐溶剂性。