文献类型：期刊文献

英文题名：Amino acid modified molecular sieves with different pore size for chiral separation

作者：Li, Xiaoxiao[1,2];Meng, Chenchen[1,2];Meng, Yan[3];Gu, Liangning[1,2];Chen, Qibin[1,2];Liu, Honglai[1,2]

机构：[1]East China Univ Sci & Technol, State Key Lab Chem Engn, Shanghai 200237, Peoples R China;[2]East China Univ Sci & Technol, Sch Chem & Mol Engn, Shanghai 200237, Peoples R China;[3]Changan Univ, Sch Environm Engn, Xian 710054, Shaanxi, Peoples R China

年份：2019

卷号：581

外文期刊名：COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS

收录：;EI(收录号：20193407350597);WOS:【SCI-EXPANDED(收录号:WOS:000487764400012)】；

基金：This work is supported by National Natural Science Foundation of China, the Fundamental Research Funds for the Central Universities of China and the 111 Project of Ministry of Education of China. Qibin Chen received funding from National Natural Science Foundation of China (No. 21576079). Honglai Liu received funding from National Natural Science Foundation of China (No. 91834301 and 91334203) and the 111 Project of Ministry of Education of China (No. B08021).

语种：英文

外文关键词：Enantioseparation; Adsorption; Chiral recognition; Pore size

摘要：The pore size of porous materials is of great importance for controlling chiral separation of enantiomers. However, the roles of the porous dimension in determining the separating performance are still unclear, especially when pores are comparable with or slightly larger than the target enantiomers in size. Here, we detected the effect of the pore dimension on the chiral separation performances using organic-inorganic hybrid materials with the different porous sizes at the nanometric level, which bore a chiral selector and thus can selectively bind one of enantiomers. In this work, mesoporous molecular sieves, i.e., SBA-15, KIT-6 and MCM-41, chemically modified with a chiral selector, N-acyl-protected d-glutamic acid, were used to separate d- and l-phenylalanine, as the chiral probes. The structure of hybrid materials, together with raw materials and intermediates, were systematically characterized by TEM, EA, TGA, XRD, FT-IR, and so on. The influence of porous size on enantioseparation behaviors can be defined by comparing enantioseparation results among SBA-15, KIT-6 and MCM-41 based hybrid materials, since they have different inner diameters. Results show that the MCM-41 based hybrid material with a (similar to)1.1 nm inner diameter exhibits an extraordinary chiral resolution performance, having a greater enantioselectivity, compared with KIT-6 and SBA-15 based hybrid material with the diameter of (similar to)4.0 and 7.8 nm. Our findings demonstrate that the pore size plays an important role in the enantioselectivity of porous materials.