This work presents the investigation of permethyl pillararene (MP5) as stationary phase for capillary gas chromatographic (GC) separations. The MP5 capillary column fabricated by the sol-gel coating method exhibited weak polarity and high column efficiency over 4200 plates/m for n-dodecane, n-octanol and naphthalene. Particularly, the MP5 stationary phase displays unique retention for dibromoalkanes, which was found to be closely related with the linker length, and shows high resolving capability for a wide range of positional and structural isomers, including alkylbenzenes, chlorobenzenes and chloronitrobenzenes, naphthalene derivatives, phenols and anilines. Moreover, the MP5 column showed good thermal stability and repeatability and reproducibility with the relative standard deviation in the range of 0.02-0.04% for intra-day, 0.32-0.46% for inter-day and 1.5-3.4% for between-column, respectively. One spawner produces spiders and the the other one zombies.
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We cannot confirm if there is a free download of this software available. This work demonstrates an promising future of pillararenes as a new type of stationary phase in chromatographic separations. High-performance liquid chromatography with photodiode array. Liquid Notes for Live 3.0.3.111 was available to download from the developer's website when we last checked. Liquid definition, composed of molecules that move freely among themselves but do not tend to separate like those of gases neither gaseous nor solid. In this review, we highlight recent significant advancements for the systematic investigation of achiral, planar chiral and chiral configurations of pillararenes. Compared to the traditional macrocyclic molecule, these interesting frame structures have drawn a lot of attention in analytical chemistry and separation science in recent years, due to their unique superiority advantages such as pillar-shaped frame, electron-rich cavity and easy to functionalize.
Although considering the abundant research results on pillararenes, there have been few reviews on the synthesis of planar chiral or chiral pillararenes, as well as summarizing from the perspective of separation science.
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