CAJ | 학술논문

离子液体作为毛细管气相色谱固定相的选择性和热稳定性是近年人们关注的课题.本文合成了 1-烯基-3-苄基咪唑-二(三氟甲基磺酰)亚胺盐(VBIm-NTf_2)离子液体并经毛细管柱内聚合制得了聚合离子液体PVBIm-NTf_2色谱柱.与VBIm-NTf_2色谱柱相比,PVBIm-NTf_2色谱柱具有良好的色谱选择性和热稳定性.PVBIm-NTf_2色谱柱对Grob试剂、醇混合物、酯混合物和苯系物等都表现了很好的分离能力,并且色谱峰峰形窄且对称.该聚合色谱柱在250 ℃下老化6 h后仍具有良好的分离能力和选择性.本文还测定了PVBIm-NTf_2的Abraham溶剂化参数,解析了该固定相与溶质间的相互作用,相关研究国内尚未见报道.研究表明,对常规离子液体进行柱内聚合是改善常规离子液体气相色谱固定相的热稳定性和选择性的有效途径.
리자액체작위모세관기상색보고정상적선택성화열은정성시근년인문관주적과제.본문합성료 1-희기-3-변기미서-이(삼불갑기광선)아알염(VBIm-NTf_2)리자액체병경모세관주내취합제득료취합리자액체PVBIm-NTf_2색보주.여VBIm-NTf_2색보주상비,PVBIm-NTf_2색보주구유량호적색보선택성화열은정성.PVBIm-NTf_2색보주대Grob시제、순혼합물、지혼합물화분계물등도표현료흔호적분리능력,병차색보봉봉형착차대칭.해취합색보주재250 ℃하노화6 h후잉구유량호적분리능력화선택성.본문환측정료PVBIm-NTf_2적Abraham용제화삼수,해석료해고정상여용질간적상호작용,상관연구국내상미견보도.연구표명,대상규리자액체진행주내취합시개선상규리자액체기상색보고정상적열은정성화선택성적유효도경.
The selectivity and thermal stability of ionic liquids as the stationary phases for capil-lary gas chromatography (CGC) have attracted much attention of researchers in recent years. In this study, 1-vinyl-3-benzyl imidazolium-bis(trifluoromethane-sulphonyl)imidate (VBIm-NTf_2) was synthesized and polymerized (PVBIm-NTf_2) in a CGC column. In comparison with VBIm-NTf_2, PVBIm-NTf_2 exhibits much better thermal stability and chromatographic selectivity, and achieves satisfactory resolution for Grob test mixture, alcohols mixture, esters mixture and ar-omatics mixture with narrow and symmetric peak shapes. The satisfactory resolution and selec-tivity of the polymerized column still remain after conditioned at 250 ℃ for 6 h. Additionally, the Abraham solvation parameters of PVBIm-NTf_2 were determined and the interactions between the stationary phase and solutes were elucidated. The present work demonstrates that the polymerization is an effective way to improve the selectivity and thermal stability of common ionic liquids as CGC stationary phases.