Akapo, S. O. published the artcileInfluence of temperature and mobile phase composition on retention properties of oligomeric bonded phases in reversed-phase liquid chromatography (RPLC), Safety of Dichloro(methyl)(octyl)silane, the publication is Chromatographia (1997), 44(3/4), 135-144, database is CAplus.
The effect of temperature and mobile phase composition (methanol-water) on the retention behavior of an oligomeric series of n-octylsilyl bonded phases in reversed-phase liquid chromatog. was investigated. Plots of In k against 1/T (van’t Hoff plot) and the enthalpy of transfer (ΔH°) yields linear relationships under the conditions studied. The ΔH° values of the aromatic hydrocarbons and n-alkyl benzoates are higher than those of the polar compounds due to their higher level of interaction with the stationary phase. A linear plot of ΔH° vs. ΔS° suggest that the retention process, which is essentially controlled by non-specific (dispersive) interactions between the solutes and the bonded ligands, is identical for all cases evaluated. The existence of similar retention mechanisms is confirmed by the constant value of the enthalpy-entropy compensation temperature of the columns for a given class of compounds As expected, decreasing the methanol content (% volume/volume) of the mobile phase results in increased eluate retention times. The methylene and Ph selectivities are found to be independent of the carbon content of the stationary phases and varied only with the eluent composition In addition to their high stability under aggressive mobile phase conditions as previously reported, the results of this study generally showed that the solute retention process on oligomeric phases are similar to those exhibited by the conventional reversed phases.
Chromatographia published new progress about 14799-93-0. 14799-93-0 belongs to chlorides-buliding-blocks, auxiliary class Aliphatic Chain, name is Dichloro(methyl)(octyl)silane, and the molecular formula is C9H20Cl2Si, Safety of Dichloro(methyl)(octyl)silane.
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