Synthesis and properties of mercaptosilicone modified by Ni(II) and Co(II) as stationary phases for capillary complexation gas chromatography

1999

Chromatographia

SummaryThe use of polysiloxanes with cyano or thiol groups as stationary phases for complexation gas chromatography is discussed. The polymers were obtained via polycondensation followed by polymerisation of the corresponding dichloro-or dimethoxy-silanes. Both the phases were modified by bonding transition metal chlorides with cyano (CuC12 or COC12) and thiol groups (NiC12 or COC12). The phases were examined in order to determine their application to the analysis of ethers, thioethers and ketones. Due to the presence of lone electron pairs on oxygen or sulphur atoms, the compounds should be capable of specific interacting with the electron-withdrawing centre of the liquid stationary phases. A number of retention parameters (retention indices, molecular retention indices and specific retention volume) were determined, which allowed characterisation of specific interactions between the bonded metal and the compound analysed. The results also enabled assessment of the influence of the structure of the compounds on their retention. The measurements were also carried out for the phases with free SH and CN groups as reference phases. The work demonstrates that the phases obtained may be useful for effective separations.

Section: Characteristic Of Stationary Phases Modified By Cu(ll) Ni(lmentioning

confidence: 99%

Section: Characteristics Of the Columnsmentioning

confidence: 99%

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Transition metal complex stationary phases for the CGC analysis of ethers, thioethers and ketones

Wawrzyniak

1999

Chromatographia

“…The next step in the evolution of CGC was to apply the silica, modified with suitable functional groups, as a stationary phase for the capillary columns. Capillary columns coated with a liquid stationary phase containing cyano (3‐cyanopropylmethylpolysiloxane) and thiol groups (3‐mercaptopropylmethylpolysiloxane) were modified by bonding chlorides of copper (II), nickel (II), and cobalt (II) . The authors of Refs.…”

Section: Introductionmentioning

confidence: 99%

“…The authors of Refs. characterized the packings by studying their interactions with such adsorbates as aliphatic and aromatic halogenated hydrocarbons, cyclic and aromatic hydrocarbons, and cyclic and chlorohydrocarbons …”

Section: Introductionmentioning

confidence: 99%

Stationary Phases for Complexation Gas Chromatography and Microextraction Methods

Rykowska

Israel Journal of Chemistry

2016

The main goal of this review is to provide an overview of the trends in the technological development of complexation gas chromatography. This kind of chromatography, despite the passage of years, continues to offer new opportunities. The authors would like to show how complexation gas chromatography evolved over the years, due to the variety of stationary phases with complexation properties, their ability to separate, very specifically, the structures of the molecules and chemical compounds, improving the quality of the obtained results, and continuously lowering the detection limits of the analysed compounds in very complex matrices, including environmental and medical samples. The work is dedicated to the memory of Professor E. Gil‐Av, whose scientific achievements were the inspiration for the improvement and widening of the research on the use of complexing metal ions and coordination metal compounds for selective separation in gas chromatography.

Capillary complexation gas chromatography in analysis of cyclic and aromatic hydrocarbons

Wawrzyniak

2000

Chromatographia

SummaryResults of studies on stationary phases containing copper(II), nickel(II) and cobalt(lI) chloride chemically bonded via cyano -or thiol groups are presented. The retention parameters -i.e. retention factor (k), retention index (I) and molecular retention index (AMe) and specific retention volume (Vg) -enabled the characteristics of specific interaction between aromatic and cyclic hydrocarbons and metal complexes chemically bonded to stationary phases to be determined.