Fig. 2 | Scientific Reports

Fig. 2

From: Photostability of polycyclic aromatic hydrocarbons in hydrated magnesium sulfate under Martian ultraviolet irradiation to assist organics detection on Mars

Fig. 2The alternative text for this image may have been generated using AI.

IR spectra comparison for pure benzo[a]pyrene (red spectrum), \(\:1\:\)wt.\(\:\%\) benzo[a]pyrene adsorbed on hydrated magnesium sulfate (black spectrum) and hydrated magnesium sulfate blank (blue spectrum) in (a) IR \(\:8000-3500\:{cm}^{-1}\) spectral range; (b) IR \(\:3500-450\:{cm}^{-1}\) spectral range. Only adsorbed benzo[a]pyrene bands with shifts greater than the resolution of the instrument (\(\:>4\:{cm}^{-1}\)) with respect to the pure benzo[a]pyrene are shown. Legend: \(\:\nu\:\) stretching vibrations; \(\:{\delta\:}_{ip}\) in-plane bending vibrations; \(\:{\delta\:}_{oop}\) out-of-plane bending vibrations.

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