vibrational spectra and surfaceenhanced vibrational spectra of 1nitropyrene the present report on the vibrational spectra of 1nitropyrene 1np describes the infrared and raman spectra their interpretation is aided by local density functional theory dft calculations at the b3lyp6311gd p level of theory and by the surfaceenhanced vibrational spectra sevs with the final objective of trace organic analytical applications the surfaceenhanced raman scattering sers on silver island films and mixed silvergold island films was investigated with several laser lines in the visible region surfaceenhanced infrared absorption seira was attempted on silver and gold island films the interface of the organic 1np with smooth metal surfaces of silver and copper was also probed using reflectionabsorption infrared rairs spectra that in conjunction with the transmission spectra allow one to extract the molecular orientation in vacuum evaporated thin solid films chemical adsorption of 1np on silver and further photochemical decomposition of the 1npmetal adsorbates was detected with all visible laser lines resonance raman scattering rrs using uvlaser excitation at 325 nm was also recorded