Low frequency spectra of naphthalene and naphthols probed by GaP THz spectrometer

Authors

Carlito S. Ponseca Molecular Photoscience Research Center, Kobe University
Keisuke Tominaga Molecular Photoscience Research Center, Kobe University and Graduate School of Science, Kobe University
Elmer S. Estacio Institute of Laser Engineering, Osaka University
Nobuhiko Sarukura Institute of Laser Engineering, Osaka University
Alex V. Quema Laser Research Center, Institute for Molecular Science
Glenda De Los Reyes Laser Research Center, Institute for Molecular Science
Jun-ichi Nishizawa Semiconductor Research Institute, Sendai, Japan
Tetsuo Sasaki Semiconductor Research Institute, Sendai, Japan
Ken Suto Semiconductor Research Institute, Sendai, Japan

Abstract

Low frequency spectra of naphthalene, mono-, and di-hydroxy substituted naphthol isomers were obtained using GaP terahertz (THz) spectrometer. Experimental spectrum of naphthalene showed a dominant absorption band at 5.27 THz. On the other hand, quantum chemical calculations revealed an infrared active mode also at 5.27 THz which has a symmetric vibration describing a butterfly motion. Absorption spectra of naphthol isomers manifested well-defined bands above and below 5.27 THz. It is surmised that these bands have the same low frequency vibration as naphthalene and that its shift is related to the position of OH in the molecules’ structure.

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Issue

2009: Proceedings of the 27th Samahang Pisika ng Pilipinas Physics Congress

Article ID

SPP-2009-2A-01

Section

Photonics and Spectroscopy

Published

2009-10-28

How to Cite

[1]

CS Ponseca, K Tominaga, ES Estacio, N Sarukura, AV Quema, G De Los Reyes, J- ichi Nishizawa, T Sasaki, and K Suto, Low frequency spectra of naphthalene and naphthols probed by GaP THz spectrometer, Proceedings of the Samahang Pisika ng Pilipinas 27, SPP-2009-2A-01 (2009). URL: https://proceedings.spp-online.org/article/view/SPP-2009-2A-01.