Álvarez Alcalde, María de las MercedesAntelo Queijo, ÁlvaroJover Ramos, AidaMeijide del Río, Francisco ÁngelVázquez Tato, José2021-08-182021-08-182008Alcalde, M.A.; Antelo, A.; Jover, A.; Meijide, F.; Tato, J.V. Synthesis and Characterization of a New Gemini Surfactant Derived from 3a,7a,12a-trihydroxy-5ß-cholan-24-amine (Steroid Residue) and Ethylenediamintetraacetic Acid (Spacer), in Proceedings of the 12th International Electronic Conference on Synthetic Organic Chemistry, 1–30 November 2008, MDPI: Basel, Switzerland, doi:10.3390/ecsoc-12-012713-906980-20-0http://hdl.handle.net/10347/26849The 12th International Electronic Conference on Synthetic Organic Chemistry session Supramolecular ChemistryA new gemini steroid surfactant derived from 3a,7a,12a-trihydroxy-5ß-cholan-24-amine (steroid residue) and ethylenediamintetraacetic acid (spacer) was synthesized and characterized in aqueous solution by surface tension measurements and fluorescence intensity of pyrene. These techniques evidence the existence of a threshold concentration, cac, below which a three layers film is formed at the air-water interface. At high concentrations, the intensity ratio of the vibronic peaks of pyrene, I1/I3, (= 0.81) is very close to published values for sodium cholate micelles, indicating that the probe is located in a region with a very low polarity and far from watereng© 2008 The author(s). Published by MDPI, Basel, Switzerland. Open Accessbook part10.3390/ecsoc-12-01271open access