New naphthalene containing side-chain liquid crystalline polysiloxane stationary phases for high-resolution gas chromatography

• Published in: Journal of Chromatography A Vol. 811; no. 1; pp. 97 - 103
• Main Authors: Naikwadi, K.P., Wadgaonkar, P.P.
• Format: Journal Article
• Language: English
• Published: Amsterdam Elsevier B.V 19-06-1998; Elsevier
• Subjects: Analytical chemistry; Chemistry; Chromatographic methods and physical methods associated with chromatography; Exact sciences and technology; Other chromatographic methods; Pesticides; Polychlorinated dibenzodioxins; Polynuclear aromatic hydrocarbons; Polychlorinated dibenzodioxins; Stationary phases, GC; Polynuclear aromatic hydrocarbons; Liquid crystals; Pesticides; Electron capture detector; Separation; Coupled method; Thermotropic state; Flame ionization detector; Polycyclic aromatic compound; Experimental study; Naphthalene derivatives; Electrospray; Gas chromatography; Pollutant; Side chain; Position isomer; Biphenyl derivatives; Organochlorine compounds; Liquid crystal polymers; Chlorine Organic compounds; Siloxane copolymer; Mass spectrometry; Stationary phase
• ISSN: 0021-9673
• DOI: 10.1016/S0021-9673(98)00209-X

A new side-chain liquid crystalline polysiloxane (SCLCP) having a wide liquid crystalline range of 140°C to 315°C was used as a stationary phase in capillary column gas chromatography. A series of new SCLCPs was synthesized using olefins containing 2,6-disubstituted naphthalene. The olefins were attached to a hydromethylpolysiloxane backbone by a hydrosilylation reaction using a platinum catalyst. Reproducible fused-silica capillary columns were made from the new SCLCP stationary phase. The columns have high thermal stability, efficiency and isomer specificity for the separation of isomeric compounds. The separations on the SCLCP stationary phase column and on a dimethyl (5% phenyl)polysiloxane stationary phase column are compared. The applications of capillary columns made from the new SCLCP for the separation of isomeric polychlorinated dibenzo-
p-dioxins, polycyclic aromatic hydrocarbons and pesticides are demonstrated as examples.