Liquid crystals

Pawar, Pravina P.; Naikwadi, K.P.; Likhite, S.M.; Bapat, B.V.; Ghatge, B.B.

doi:10.1016/s0021-9673(00)82474-7

Cited by 16 publications

(1 citation statement)

References 22 publications

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“…Their use by blending with polymeric silicone phases in capillary columns resulted in moderate selectivities and higher efficiencies than packed columns (1 1, 12). The synthesis of new liquid crystalline compounds and separation of disubstituted benzene isomers (13), insect sex pheromones (14), and the effect of the chemical structure of liquid crystalline compounds on separation potential is reported in the literature (8). Recently, polymeric liquid crystals were developed for use in capillary columns (15)(16)(17)(18)(19)(20).…”

Section: Introductionmentioning

confidence: 99%

Prospectives of polymeric liquid crystal stationary phases for capillary column gas chromatographic separations

Naikwadi¹,

McGovern²,

Karasek³

1987

Can. J. Chem.

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The liquid crystalline polysiloxane substrate offers unique selectivity when used in capillary column gas chromatography. The separation and identification of priority pollutants along with other compounds is very difficult but important. In particular, the separation of isomeric organic compounds having similar volatilities could not be obtained on capillary columns using conventional stationary phases. The complete separation of ortho, meta, and para isomers of certain disubstituted benzenes as well as polycyclic aromatic compounds was achieved on a capillary column using a liquid crystalline polysiloxane stationary phase. The complete separation of octachlorodibenzodioxin from octachlorodibenzofuran was also obtained on this column which is not possible on columns of identical lengths using conventional stationary phases. The separation of polycyclic aromatic compounds in a complex sample of airborne particulate matter extract on the liquid crystal column is demonstrated.

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Section: Introductionmentioning

confidence: 99%

Prospectives of polymeric liquid crystal stationary phases for capillary column gas chromatographic separations

Naikwadi¹,

McGovern²,

Karasek³

1987

Can. J. Chem.

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Liquid crystal stationary phases for gas chromatography and supercritical fluid chromatography

Rokushika

Naikwadi

Jadhav

et al. 1985

J. High Resol. Chromatogr.

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Novel monomeric and polymeric liquid crystalline compounds were synthesized as stationary phases for gas chromatography (GC) and supercritical fluid chromatography (SFC). Monomeric liquid crystalline compounds were used in packed column gas chromatography for the separation of isomeric aromatic compounds and insect sex pheromones. Liquid crystalline polymers possess long nematic ranges and a uniform coating was easily achieved in glass and fused silica capillaries, which could stand temperatures up to 25OOC in GC and pressures of 200 MPa at 160OC in SFC. The columns provide excellent selectivity and resolution for fused ring aromatic compounds such as the isomers anthracene and phenanthrerie or triphenylene and chrysene.

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Factors influencing retention and resolution of substituted alkylbenzenes in reversed-phase liquid chromatography

Barman

Martire

1992

Chromatographia

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Liquid crystals

Cited by 16 publications

References 22 publications

Prospectives of polymeric liquid crystal stationary phases for capillary column gas chromatographic separations

Prospectives of polymeric liquid crystal stationary phases for capillary column gas chromatographic separations

Liquid crystal stationary phases for gas chromatography and supercritical fluid chromatography

Factors influencing retention and resolution of substituted alkylbenzenes in reversed-phase liquid chromatography

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