Investigations of methyl lactate in the presence of reverse micelles by vibrationalspectroscopy and circular dichroism

Angela Monia Ruggirello, Vincenzo Turco Liveri, Marco Passarello, Roberto Gangemi, Sergio Abbate, Giovanna Longhi, France Lebon

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6 Citations (Scopus)

Abstract

The FT-IR and vibrational circular dichroism (VCD) spectra of (S)- and -(R)-methyl lactate have beenrecorded for neat samples and at various concentrations in CCl4 and DMSO solutions. These spectraare used to analyse the FT-IR and VCD spectra of methyl lactates in presence of sodium bis(2-ethylhexyl)sulfosuccinate (AOT) in CCl4, where the surfactant molecules are known to form reversemicelles. Some tendency of methyl lactate to interact with AOT micellar aggregates is observed, butnot as well defined as previously observed for dimethyl tartrate in analogous circumstances. Besides,near infrared (NIR) absorption and VCD data have been obtained for most of the above systems, allowingto monitor the first overtone of the OH-stretching vibration of methyl lactates, especially in the spectroscopicregion where the OH bond is not involved in hydrogen bond with other molecules. The NIRabsorption and NIR VCD data for dilute solutions are reproduced and interpreted by anharmonic DFT calculations.Further understanding of the behavior of aggregated methyl lactate systems has been gainedon this basis.
Original languageEnglish
Pages (from-to)54-62
Number of pages9
JournalVibrational Spectroscopy
Volume60
Publication statusPublished - 2012

All Science Journal Classification (ASJC) codes

  • Spectroscopy

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