Separation performance of cucurbit[7]uril in ionic liquid-based sol-gel coating as stationary phase for capillary gas chromatography

Separation Performance of Capillary Gas Chromatography Based on Monohydroxycucurbit[7]Uril Incorporated Into Sol–Gels as the Stationary Phase

“…column, the (OH)Q[7]/PDMS column achieved much higher resolution for nonanal and 1-octanol (Peaks 4, 5) (R = 2.0) in the Grob mixture than the Q[6]-GBIL column (R = 1.0) (Wang et al, 2014a), and also obtained better separation efficiency between 2-ethylhexanoic acid, 2,6-dimethylphenol, methyl dodecanoate and 2,6-dimethylaniline than that of the reported Q[7]-SG column (Wang et al, 2014b). From an elution perspective, the (OH)Q[7]/PDMS stationary phase exhibited different retention behaviors from either the Q[6]-GBIL or the Q[7]-SG stationary phase due to their different sol-gel structures (Wang et al, 2014a,b).…”

Cyclotriveratrylene as a new-type stationary phase for gas chromatographic separations of halogenated compounds and isomers

“…Due to their advantageous features in stability, solubility and recognition selectivity to guest molecules, CTVs seemed to be promising candidates as stationary phase for capillary gas chromatography (GC). In GC separations, other types of macrocycles such as crown ethers [9][10][11], cyclodextrins [12][13][14], calixarenes [15][16][17][18] and cucurbiturils [19][20][21][22] have been reported. On the basis of the aforementioned recognition selectivity for halogenated compounds, GC separation performance of CTV was highly expected for these analytes and their isomers.…”

Selectivity of the binary stationary phase of cucurbit[7]uril with ionic liquid in gas chromatography

“…CBs features high recognition ability and physicochemical stability and can be good candidates as stationary phases in chromatography. Recently, they were reported in liquid chromatography 9,10 and capillary gas chromatography (GC), [11][12][13][14][15] showing great potential in the eld. Currently, the most challenging problem for their use as GC stationary phases is their poor solubility in organic solvents such as dichloromethane used for column fabrication.…”

“…For addressing the problem, we investigated the column fabrication methods by static coating of its dispersion in dichloromethane 12,13,15 and by sol-gel coating of its sol in multiple solvents and agents. 11,14 Despite the improved performance by the former method, there is still large room for boosting the column efficiency of CBs by enhancing their solubility in the solvent. Undoubtedly, improving column efficiency would further advance column separation performance.…”