Critical vesicular concentration of maslinic acid in aqueous binary liquid mixture by using hydrophobic pyrene as a fluorescent probe

Maslinic acid, a naturally occurring 6-6-6-6-6 dihydroxy triterpenic acid is extractable from the fruits of olive (Olea europaea) as a white crystalline solid. This molecule can undergo spontaneous self-assembly in different aqueous-organic binary liquid mixures to yielding vesicles of nano to micrometer dimensions (B.G. Bag, S.N. Hasan, S. Ghorai, S.K. Panja, ACS Omega, DOI: 10.1021/acsomega.8b03667). Herein, we report our detailed investigation of the critical vesicular concentration (CVC) of self-assembled vesicles obtained from maslinic acid in different aqueous-organic binary liquid mixtures by using pyrene as a fluorescent probe. We choose two binary liquids mixture such as DMF-water, DMSO-water and also varying the solvent ratio of DMSO-water. The CVC value of DMF-water is 90 µm and for DMSO-water at 2:1 v/v, 1:1 v/v, 1:1.5 v/v and 1:4 v/v are 70 µm, 58 µm, 60 µm and 50 µm respectively.