Hydrophilic carotenoids: surface properties and aggregation behavior of a highly unsaturated carotenoid lysophospholipid.
The water dispersibility of a hydrophobic carotenoid has been greatly enhanced by using it as the acyl part in the synthesis of a highly unsaturated lysophospholipid. Dynamic light scattering has revealed the formation of stable aggregates with an average hydrodynamic radius of a few nanometers, and absorption spectra show that the aggregates can withstand the addition of ethanol or acetonitrile until the volume fraction of water falls below 70 and 62%, respectively. The properties of the carotenoid phospholipids have been characterized by determining surface tension, critical micelle concentration, surface concentration, molecular area, free energy of adsorption and micellation, adsorption-micellar energy relationship, and equilibrium constants.
Foss
Bente Jeanette
BJ
Department of Chemistry, Norwegian University of Science and Technology, N-7491 Trondheim, Norway.
Sliwka
Hans-Richard
HR
Partali
Vassilia
V
Naess
Stine Nalum
SN
Elgsaeter
Arnljot
A
Melø
Thor-Bernt
TB
Naqvi
K Razi
KR
D002338:Carotenoids / Q000737:chemistry*; D008027:Light; D008244:Lysophosphatidylcholines / Q000737:chemistry*; D008823:Micelles; D012542:Scattering, Radiation; D013499:Surface Properties; D013501:Surface-Active Agents / Q000737:chemistry*; D013816:Thermodynamics; D014867:Water / Q000737:chemistry*
D008244:Lysophosphatidylcholines; D008823:Micelles; D013501:Surface-Active Agents; D014867:Water; D002338:Carotenoids