HAL will be down for maintenance from Friday, June 10 at 4pm through Monday, June 13 at 9am. More information
Skip to Main content Skip to Navigation
Journal articles

Some Insights About 1,6-Diphenyl-1,3,5-hexatriene-Lipid Supramolecular Assemblies by Steady-State Fluorescence Measurements

Abstract : Diphenyl-1,3,5-hexatriene (DPH) is the most widely proposed molecular probe for the post-column fluorescence derivatization of lipids after liquid chromatography separation. This kind of detection consists of a supramolecular combination of DPH and eluted lipids. The detection is optimally performed in a mainly aqueous environment (over 80% v/v) because the weak fluorescence of DPH in water is drastically enhanced upon formation of supramolecular assemblies with lipids. In the present study, and in order to obtain better spectroscopic insights into the nature of these supramolecular assemblies, two different lipids were tested, 1,2,3tridodecanoylglycerol (LLL) as a model triglyceride (nonpolar lipid) and dimyristoylphosphatidylcholine (DMPC) as a model phosphatidylcholine (charged amphiphilic lipid). Stoichiometry and association constants were determined on the basis of the variation of fluorescence intensity in the presence of various concentrations of lipids. LLL 60-DPH 2 and DMPC 200-DPH 2 complexes were identified with association constants as high as K 2 ¼ (5.8 6 0.5) 3 10 13 M À2 and (17.3 6 2.0) 3 10 13 M À2 for LLL and DMPC, respectively. The fluorescence intensity of DPH in the presence of LLL is greater than in the presence of DMPC. An attempt to characterize the insertion mode of DPH in the lipidic supramolecular assemblies is also made.
Document type :
Journal articles
Complete list of metadata

Contributor : Patrick England Connect in order to contact the contributor
Submitted on : Friday, January 14, 2022 - 5:29:05 AM
Last modification on : Thursday, April 7, 2022 - 10:10:53 AM




E. Caudron, J. Zhou, Patrick England, M. Ollivon, P. Prognon. Some Insights About 1,6-Diphenyl-1,3,5-hexatriene-Lipid Supramolecular Assemblies by Steady-State Fluorescence Measurements. Applied Spectroscopy, Society for Applied Spectroscopy, 2007, 61 (9), pp.963-969. ⟨10.1366/000370207781745937⟩. ⟨pasteur-03525655⟩



Record views