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

Abstract

The binary stationary phase of CB7 in an ionic liquid shows high selectivity and resolving ability for diverse analytes via multiple molecular interactions and unique retention mechanism.

High Selectivity of A Novel Pillar[5]arene with Ester Units as a Gas Chromatographic Stationary Phase toward Aromatic Isomers

“…[6,7] Therefore, the development of highly selective stationary phases for GC separations has been the goal of researchers. Current GC stationary phases can be classified into linear chain polymers, [8,9] planar large π-systems, [10] macrocyclic, [11,12] and three-dimensional (3D) macrocycles [13][14][15][16][17] according to their structures. Among them, macrocyclic stationary phases have unique characteristics, such as 3D cavities structure, high chemical and thermal stability, and abundant molecular recognition interactions with analytes, [18][19][20] including dispersion, π-π, dipoledipole and H-bonding interactions.…”

High-efficiency cucurbit[7]uril capillary column for gas chromatographic separations of structural and positional isomers

“…Recently, advancements have been made for utilizing CBn as stationary phases in gas chromatography (GC) [9][10][11][12][13] and liquid chromatography. 14 They show selective GC separations and high column stability.…”

“…In our previous work, we made great improvements by using sol-gel coating method 11,12 and by static coating method with the aid of a guanidinium-based ionic liquid. 13 As proven, the ionic liquid was highly efficient in achieving high column efficiency but it is not easily available and costs high for its synthesis. Therefore, exploring other efficient materials would be favorable for the practical use of high-efficiency CBn columns.…”