Molecular shape and the prediction of high-performance liquid chromatographic retention indexes of polycyclic aromatic hydrocarbons.

The effects of molecular shape on the retention behavior of polycyclic aromatic hydrocarbons (PAH) have been studied. It has been found that the retention on polymeric phases is highly shape dependent in contrast to the monomeric phases where retention is more dependent on the electronic properties of the solute. In addition, retention on the polymeric phases has been studied with respect to substitution and shape. The retention of substituted PAHs shows a strong dependence on shape, whereas the retention of unsubstituted PAHs is more dependent on electronic properties.

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