A relationship between the retention indices on nematic and isotropic phases and the shape of polycyclic aromatic hydrocarbons

Radecki, Aleksander; Lamparczyk, H.; Kaliszan, Roman

doi:10.1007/bf02265531

Cited by 125 publications

(37 citation statements)

References 13 publications

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“…The selectivity for the two-dimensional shape has been further studied with a molecular shape descriptor, length-tobreadth (L/B) ratio. The parameter was proposed by Wise et al [40 -42] and Kaliszan et al [43,44], and is defined as the length-to-breadth ratio of the two-dimensional molecule projected on the flat surface. Thus L/B indicates two-dimensional shape of a molecule, and it quantitatively classifies "rod-like" molecules and "square-like" molecules, as shown in Figure 3.…”

Section: Pahs As Sample Probesmentioning

confidence: 99%

Design and characterization of novel stationary phases based on retention behavior studies with various aromatic compounds

Saito¹,

Ohta²,

Jinno³

2003

J of Separation Science

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Design and characterization of novel stationary phases based on retention behavior studies with various aromatic compounds Characterization of stationary phases by retention behavior studies with aromatic compounds is reviewed, focusing mainly on the authors' approach. Various aromatic compounds, such as polycyclic aromatic hydrocarbons (PAHs) and fullerenes, of different molecular shape and size were employed as the sample probes. For the systematic analysis of retention behavior, some spectroscopic techniques and theoretical calculations, such as energy minimized calculation of the phase structure, have also been employed to confirm the results from these retention studies. During these investigations, microcolumn chromatography was employed in order to evaluate small amounts of experimentally synthesized bonded phases. The design of several novel stationary phases, based on the molecular shape recognition concept, is also briefly reviewed along with the applications.

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Section: Pahs As Sample Probesmentioning

confidence: 99%

Design and characterization of novel stationary phases based on retention behavior studies with various aromatic compounds

Saito¹,

Ohta²,

Jinno³

2003

J of Separation Science

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“…For GC analysis of PAHs a great number of columns (Table 1 [34][35][36], methylfluoropropylpolysiloxane [30], N, N-bisk-methoxybenzy1idene)-a,a-bi-p-toluidine (BMBT) [37], cyanopropylsilicone [34], polysiloxane-polyethylene glycol [23], and smetic [38] phases. [24][25][26]391, while under isothermal conditions (commonly temperatures 230 "C, 240 "C, and 270 "C are chosen) a larger set of compounds is considered [20,21,231.…”

Section: Introductionmentioning

confidence: 99%

Retention index system, adsorption characteristics, and structure correlations of polycyclic aromatic hydrocarbons in fuels

Elizalde-González

Hutfließ

Hedden

1996

J. High Resol. Chromatogr.

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SummaryPart of this work focuses on temperature programmed retention index assessment of 70 polynuclear aromatic hydrocarbons (PAHs) using a methylsilicone capillary column. The use of the retention index presented here offers a good possibility of identifying and determining PAHs in the mass range discussed and to apply such conditions to the analysis of fuel and fuel deposits. Retention indices and vaporization enthalpy data of PAHs are linearly related to the molecular total energy. This paper describes also a gas-chromatographic study of the adsorption of some PAHs on Carbopack.

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“…In general, molecular size of PAHs has been represented by the F number proposed by Hurtubise et al [lo], and is defined as F = (the number of double bonds) + (the number of primary or secondary carbons) -0.5 x (the number of non-aromatic rings). The two-dimensional shape of PAHs is generally represented by length-to-breadth (L/B) ratio, which was proposed by Wise et al [ll] and Kaliszan et al [12], and is defined as the length-tobreadth ratio of the two-dimensional molecule projected on the flat surface. Thus L/B indicates two-dimensional molecular shape.…”

Section: Methodsmentioning

confidence: 99%

Molecular shape recognition of polycyclic aromatic hydrocarbons with a liquid‐crystal bonded phase in supercritical fluid chromatography

Jinno

Mae

Saito

et al. 1991

J Microcolumn Separations

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Abstract. The chromatographic characteristics of a liquid crystal bonded phase have been evaluated for the separation of polycyclic aromatic hydrocarbons (PAHs), especially focusing on its shape recognition capability in supercritical fluid chromatography (SFC). The results clearly indicate that the phase has a stronger molecular planarity and shape recognition capability than typical polymeric and monomeric octadecylsilica (ODs) phases because of the very ordered bonded phase structure. The recognition capability was slightly dependent on SFC conditions such as column pressure, column temperature, and mobile phase density. Modifier addition did not make a large difference on the recognition capability. The phase seems to be a very promising stationary phase in SFC because the recognition capability is slightly influenced by the SFC conditions. Selectivity enhancement for molecular shape and planarity recognition has been found in SFC compared to reversed-phase LC separations with the same stationary phase.

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A relationship between the retention indices on nematic and isotropic phases and the shape of polycyclic aromatic hydrocarbons

Cited by 125 publications

References 13 publications

Design and characterization of novel stationary phases based on retention behavior studies with various aromatic compounds

Design and characterization of novel stationary phases based on retention behavior studies with various aromatic compounds

Retention index system, adsorption characteristics, and structure correlations of polycyclic aromatic hydrocarbons in fuels

Molecular shape recognition of polycyclic aromatic hydrocarbons with a liquid‐crystal bonded phase in supercritical fluid chromatography

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