Terahertz spectroscopic characterization of naphthalene and 1-nitronaphthalene

Terahertz absorption spectra of parent polycyclic aromatic hydrocarbon (naphthalene) and its nitropolycyclic aromatic hydrocarbon (1-nitronaphthalene) have been investigated using terahertz time-domain spectroscopy (THz-TDS) technique. The results show large difference in 0.1~2.2 THz region, which probably originated from the difference of molecular structure and lattice vibrational modes. The study indicates that THz-TDS technology can offer a new experimental method to identify and analyse such kinds of environmental pollutants.