Liquid crystalline polycarbosilanes and poly(di‐<i>n</i>‐butylsiloxane) as stationary phases in gas chromatography

Ganicz, Tomasz; Stańczyk, Włodzimierz A.; Chmielecka, Jadwiga; Kowalski, J.

doi:10.1002/pi.2527

Cited by 19 publications

(9 citation statements)

References 17 publications

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“…21 The average polarity of the stationary phase was expressed as the CP-index, calculated from the sum of the rst ve Rohrschneider-McReynolds constants divided by the sum of the Rohrschneider-McReynolds constants of OV-275 multiplied by 100. 22,23 Table 2 lists the Rohrschneider-McReynolds constants and the overall polarity on four different columns.…”

Section: Columns Polaritymentioning

confidence: 99%

A 3,4-2(trifluoromethyl phenyl)-2,5-diphenyl phenyl grafted polysiloxane as a stationary phase for gas chromatography

Zhao

Liu

et al. 2014

Anal. Methods

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In this work, a new polycyclic phenyl grafted polysiloxane called DFP-15 (15.1% 3,4-2(trifluoromethyl phenyl)-2,5-diphenyl phenyl) was synthesized by the Diels-Alder reaction of tetraphenyl cyclopentadienone monomer containing trifluoromethyl groups with methyl vinyl polysiloxanes composed of 18% methyl vinyl and 82% dimethyl groups. A second chemical called DFP-8 was also prepared for comparison purposes. The thermal stability was evaluated by thermogravimetric analysis, and the results revealed that both of the DFPs had similar thermal stability, and they began to decompose slightly at 380 C. Subsequently, the copolymers were coated on fused silica capillary columns by static coating and used as a stationary phase and were characterized. The column efficiencies of the DFP-15 and DFP-8 columns were 3960 plates per m (k ¼ 1.90, naphthalene) and 3740 plates per m (k ¼ 1.74, naphthalene), respectively. The excellent film-forming ability in the inner surface of the fused silica capillary columns was proven by the analysis of Grob reagent. Furthermore, the selectivity of the novel stationary phases for analytes, including substituted benzene isomers and polycyclic aromatic hydrocarbons, was evaluated. This work suggests that both of the stationary phases have great potential for further development and application.

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Section: Columns Polaritymentioning

confidence: 99%

A 3,4-2(trifluoromethyl phenyl)-2,5-diphenyl phenyl grafted polysiloxane as a stationary phase for gas chromatography

Zhao

Liu

et al. 2014

Anal. Methods

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“…Our opinion is connected with the factual and editorial point of view. The articles [ 16 – 18 ] have been prepared in different research centres, but the employed methods and chromatographic conditions employed appear to be questionable.…”

Section: Liquid Crystals Stationary Phases In Gcmentioning

confidence: 99%

Liquid Crystals as Stationary Phases in Chromatography

et al. 2016

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The most correct analysis of the compositions of diverse analytes mixtures is significant for analytical studies in different fields; however, many prevalent analytes cannot be identified employing traditional partition gas chromatographic methods. Thus, the increasing requirements on analytes of isomeric compounds and the problems encountered in their separation demand a study of more diverse analytical systems which are characterised by higher selectivity. Therefore, the selectivity and polarities of various liquid crystals (rod-like, banana-shape, biforked, oxygen, sulphur, nitrogen, and metal containing molecules, Schiff-base, and polymeric dendrimers) employed as liquid crystalline stationary phases (LCSPs) have been discussed from both points of views, namely, their analytical applications and thermodynamic characteristics of infinitely diluted probes with different acceptor–donor properties. Extreme particular effort has been paid to the different interdependencies between the bound up chemical structures of liquid crystal molecules with their different acceptor–donor properties and the connected resolution capabilities in the interpretation of the probe—LCSP systems, on the basis of the and dependencies, with regard to the LCSP compositions, which have been controlled by the counterbalancing of the enthalpy and entropy factors. The properties of binary systems composed of liquid crystalline poly(propyleneimine) dendrimers—rod-like molecules of liquid crystals and effects of the dendrimer structure, the chemical nature, and molecular size of the non-mesogens on the ability to dissolve in the liquid crystalline phases, have been interpreted. Practical applications of metallomesogenes and chiral stationary phases for analytical separation of different organic substances have also been taken into consideration.

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“…It is not hard to envision a variety of potential applications that are opening up for these polymers in areas such as nanotechnology [1], surface science, catalysis [2][3][4][5][6], liquid crystals [7][8][9], new ceramic materials [10][11][12][13][14], organic-inorganic hybrids etc. PCS, which contains both Si and C in their back bone structure, have been of particular importance as precursor to SiC [15][16][17][18][19][20][21].…”

Section: Introductionmentioning

confidence: 99%

Palladium(II) supported on polycarbosilane: Application as reusable catalyst for Heck reaction

Mangala

Sinija

Sreekumar

2015

Journal of Molecular Catalysis A: Chemical

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Liquid crystalline polycarbosilanes and poly(di‐n‐butylsiloxane) as stationary phases in gas chromatography

Cited by 19 publications

References 17 publications

A 3,4-2(trifluoromethyl phenyl)-2,5-diphenyl phenyl grafted polysiloxane as a stationary phase for gas chromatography

A 3,4-2(trifluoromethyl phenyl)-2,5-diphenyl phenyl grafted polysiloxane as a stationary phase for gas chromatography

Liquid Crystals as Stationary Phases in Chromatography

Palladium(II) supported on polycarbosilane: Application as reusable catalyst for Heck reaction

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