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Scholars Day 2008, Wednesday, April 9

Nuclear Magnetic Resonance Spectroscopy on Surfactant Systems

The impact that Nuclear Magnetic Resonance (NMR) imaging has had on the world of chemistry and beyond is unquestionable. Not only has NMR Spectroscopy allowed chemists to easily analyze molecular structure, but it has provided the foundation for MRI imaging in medicine, which is used to help diagnose ailments ranging from ligament damage to cancerous tumors. In this study, the specialized NMR experiments DOSY (Diffusion-ordered Spectroscopy), T1 and T2 relaxation were used to investigate surfactant/water solutions in order to determine the molecular behavior and arrangement of surfactant aggregates in solution. Solutions which contained the foreign fragrance molecule d-limonene were also studied and a comparative analysis of these two solution types was conducted. It was determined that d-limonene associated within the surfactant micelles, however, the number of d-limonene molecules overwhelmed the surfactant molecules in the concentrations studied, and therefore d-limonene must form separate aggregates or easily evaporate from the solution.

Presenter: Steven Seedhouse (Undergraduate Student)
Topic: Chemistry
Location: 33 Hartwell
Time: 1:15 pm (Session III)