Premium
Excitation and emission spectra of polyethylene terephthalate and polyethylene 2,6‐naphthalate films
Author(s) -
Ouchi Isuke,
Miyamura Ryo,
Sakaguchi Makoto,
Hosaka Shuuhei,
Kitagawa Masahiko
Publication year - 1999
Publication title -
polymers for advanced technologies
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.61
H-Index - 90
eISSN - 1099-1581
pISSN - 1042-7147
DOI - 10.1002/(sici)1099-1581(199903)10:3<195::aid-pat875>3.0.co;2-0
Subject(s) - polyethylene naphthalate , materials science , polyethylene terephthalate , excited state , spectral line , emission spectrum , polyethylene , analytical chemistry (journal) , fluorescence , absorption spectroscopy , absorption (acoustics) , excitation , wavelength , optics , optoelectronics , atomic physics , chemistry , organic chemistry , physics , electrical engineering , astronomy , composite material , engineering
With excitation by the light of the wavelengths longer than 320 nm, fluorescence spectra of polyethylene terephthalate (PET) films had somewhat different shapes from those excited below 300 nm through the intrinsic absorption of PET molecules. Also, in the measurements taken with a polarizer in front of the receiving monochoromator but none before the sample, the intensity ratio of parallel (to the draw axis of the film) and perpendicular components of the emission spectra was different if excited above 320 nm or below 300 nm. Discussion was made about the first step of pumping photon energy at the wavelengths above 320 nm. Fluorescence spectra of polyethylene 2,6‐naphthalate films showed a mirror image of their absorption spectra, consisting of one broad band having the same polarization as their absorption spectra. Their fluorescence occurred from the lowest excited level, conforming to the Kasha law. Copyright © 1999 John Wiley & Sons, Ltd.