title: Evaluation of isostructural metal-organic frameworks coated capillary columns for the gas chromatographic separation of alkane isomers.
abstract: Isostructural metal-organic frameworks (MOFs) MIL-100(Fe) and MIL-100(Cr), which have identical organic linker and Mobil Thirty-Nine zeolitic type, but different metal ions, were exploited as stationary phases for capillary gas chromatographic separation of alkane isomers. MIL-100(Fe) coated capillary column showed great capability and high efficiency for the gas chromatographic separation of alkane isomers without the need of temperature-programming, while MIL-100(Cr) coated capillary column gave poor performance for the separation. The separation performance of MIL-100(Fe) coated capillary column was even better than commercial HP-5MS and GS-GasPro capillary columns. The determined McReynolds constants, adsorption enthalpies and entropies showed that MIL-100(Fe) coated capillary column gave relatively weaker interaction with alkane isomers than MIL-100(Cr) coated capillary column. The relative standard deviations of repeatability for C7 alkane isomers on MIL-100(Fe) coated capillary column were 0.06-0.16%, 1.1-1.5%, 2.8-3.0% and 2.1-2.4% for retention time, half peak width, peak height and peak area, respectively.
authors.affiliation: State Key Laboratory of Medicinal Chemical Biology and Research Center for Analytical Sciences, College of Chemistry, Nankai University, 94 Weijin Road, Tianjin 300071, China.
authors.forename: Lin
authors.initials: L
authors.lastname: Fan
authors.forename: Xiu-Ping
authors.initials: XP
authors.lastname: Yan
mesh_terms: D000473:Alkanes / Q000737:chemistry* / Q000302:isolation & purification*; D002849:Chromatography, Gas / Q000379:methods*; D002857:Chromium / Q000737:chemistry; D019277:Entropy; D007501:Iron / Q000737:chemistry; D007536:Isomerism; D009942:Organometallic Compounds / Q000737:chemistry*
chemical_list: D000473:Alkanes; D009942:Organometallic Compounds; D002857:Chromium; D007501:Iron