Mj. Blandamer et al., INFLUENCE OF POLAR HEAD GROUPS ON THE GEL TO LIQUID-CRYSTAL TRANSITION IN VESICULAR AND LIPID BILAYER SYSTEMS, Journal of the Chemical Society. Faraday transactions, 92(17), 1996, pp. 3163-3164
Citations number
5
Categorie Soggetti
Chemistry Physical","Physics, Atomic, Molecular & Chemical
Bilayer systems in aqueous solutions formed by the C-18-bilayer system
s, dimethyldioctadecylammonium bromide (DOAB), sodium dioctadecylphosp
hate (DOP) and distearoyl phosphatidylcholine (PC) undergo well charac
terised gel to liquid-crystal transitions. Differential scanning micro
calorimetric data yield melting temperatures, enthalpies of fusion and
patch numbers for these systems which probe the effects of the polar
head groups, since in each of these systems the chain lengths are simi
lar. The patterns confirm unambiguously that the stability of vesicula
r systems reflects a balance between the stabilising effects of alkyl
chain-alkyl chain cohesive interactions and the unfavourable charge-ch
arge interactions between the polar head groups.