Vibrational structure of the polyunsaturated fatty acids eicosapentaenoic acid and arachidonic acid studied by infrared spectroscopy

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• 作者：Johannes Kiefer ; Kristina Noack ; Juergen Bartelmess ; Christian Walter ; Heike Dö ; rnenburg ; Alfred Leipertz
• 关键词：Vibrational structure ; Polyunsaturated fatty acid ; Eicosapentaenoic acid ; Eicosatetraenoic acid ; Arachidonic acid ; Infrared spectroscopy
• 刊名：Journal of Molecular Structure
• 出版年：2010
• 出版时间：25 February 2010
• 年：2010
• 卷：965
• 期：1-3
• 页码：121-124
• 全文大小：343 K

文摘

The spectroscopic discrimination of the two structurally similar polyunsaturated C₂₀ fatty acids (PUFAs) 5,8,11,14,17-eicosapentaenoic acid and 5,8,11,14-eicosatetraenoic acid (arachidonic acid) is shown. For this purpose their vibrational structures are studied by means of attenuated total reflection (ATR) Fourier-transform infrared (FT-IR) spectroscopy. The fingerprint regions of the recorded spectra are found to be almost identical, while the C–H stretching mode regions around 3000 cm⁻¹ show such significant differences as results of electronic and molecular structure alterations based on the different degree of saturation that both fatty acids can be clearly distinguished from each other.