“Structure and Functions of Archaebacterial Lipid Membranes”

Highly Hydrophobic Surface Material: Poly(phytanyl methacrylate)

“…In other words, the phyanyl chains are packed loosely in comparison with the straight chains; hence, an enthalpy (H) of the phytanyl chain may be considered smaller than that of the straight chain and accords with the phase transition study of the archaebacterial lipid membranes. [4][5][6] Since the surface energy (γ) is defined as the Gibbs free energy per unit length (G ) H -TS), it may be considered that the surface tension of poly-(PhyMA) is smaller than that of poly(n-alkyl methacrylate) such as poly(C20MA). We have currently been studying the surface properties of phytanyl chainbearing compounds.…”

“…In the course of the studies on the liposomes made of the abnormal lipids and their model compounds, we found that the assemblies were very stable at high temperature and high NaCl concentration (0−5.5 M). − We have experienced also that the membranes were weakly stained by uranyl acetate and phosphotungstic acid to result in low-contrast images in comparison with the membranes prepared from straight alkyl chain analogues . These phenomena might indicate that the polyisopranyl comounds are more hydrophobic than straight chain analogues.…”

“…[3][4][5] We have experienced also that the membranes were weakly stained by uranyl acetate and phosphotungstic acid to result in low-contrast images in comparison with the membranes prepared from straight alkyl chain analogues. 6 These phenomena might indicate that the polyisopranyl comounds are more hydrophobic than straight chain analogues. Indeed, aqueous solutions of the surfactants bearing a phytanyl group (Phy) were lower significantly in surface tension than that of straight-chain surfactants, viz., 25-30 vs 38-45 dyn/ cm at ambient temperature.…”

“…Indeed, aqueous solutions of the surfactants bearing a phytanyl group (Phy) were lower significantly in surface tension than that of straight-chain surfactants, viz., 25-30 vs 38-45 dyn/ cm at ambient temperature. 6,7 In this paper we wish to describe a new type of highly hydrophobic surface material, poly(phytanyl methacrylate) (Figure 1).…”

“…These phenomena might indicate that the polyisopranyl comounds are more hydrophobic than straight chain analogues. Indeed, aqueous solutions of the surfactants bearing a phytanyl group (Phy) were lower significantly in surface tension than that of straight-chain surfactants, viz., 25−30 vs 38−45 dyn/cm at ambient temperature. , In this paper we wish to describe a new type of highly hydrophobic surface material, poly(phytanyl methacrylate) (Figure ).

1 Reactions for preparation of poly(PhyMA).

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