Abstract
Photochemical hole spectra of 1,4-dihydroxyanthraquinone in polymer matrices at liquid helium temperatures were investigated by changing the main chain structure of polymer molecules systematically. Polymer molecules adopted here were poly(ethylene-co-methacrylic acid) (EMA) and its homopolymers poly (ethylene) (PE) and poly(methacrylic acid) (PMAA). Polarity of matrices or the number density of the electric dipoles mainly localized around the methacrylic acid units are decreased in the sequence of PMAA, EMA, and PE. Remarkable matrix effects on the hole-growth profiles were observed: The holewidth in the saturated regime decreased with decreasing the polarity of the polymer matrices from 1.4 cm-1 in PMAA through 0.15 cm-1 in EMA to 0.05 cm-1 in PE. The model of the photoinduced hole broadening is proposed in relation to the nature of two-level systems of the polymer glasses which exert influence on the holewidth. Dipole-dipole coupling is possibly a dominant interaction in the present systems. The results on the annealing properties of holewidth are also discussed.
| Original language | English |
|---|---|
| Pages (from-to) | 1272-1278 |
| Number of pages | 7 |
| Journal | The Journal of Chemical Physics |
| Volume | 88 |
| Issue number | 2 |
| Publication status | Published - 1988 |
| Externally published | Yes |
Fingerprint
ASJC Scopus subject areas
- Atomic and Molecular Physics, and Optics
Cite this
Photochemical hole burning of 1,4-dihydroxyanthraquinone in polymer glasses : Poly(ethylene), poly(methacrylic acid), and their copolymer systems. / Tani, Toshiro; Itani, Akira; Iino, Yasuhiro; Sakuda, Makoto.
In: The Journal of Chemical Physics, Vol. 88, No. 2, 1988, p. 1272-1278.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - Photochemical hole burning of 1,4-dihydroxyanthraquinone in polymer glasses
T2 - Poly(ethylene), poly(methacrylic acid), and their copolymer systems
AU - Tani, Toshiro
AU - Itani, Akira
AU - Iino, Yasuhiro
AU - Sakuda, Makoto
PY - 1988
Y1 - 1988
N2 - Photochemical hole spectra of 1,4-dihydroxyanthraquinone in polymer matrices at liquid helium temperatures were investigated by changing the main chain structure of polymer molecules systematically. Polymer molecules adopted here were poly(ethylene-co-methacrylic acid) (EMA) and its homopolymers poly (ethylene) (PE) and poly(methacrylic acid) (PMAA). Polarity of matrices or the number density of the electric dipoles mainly localized around the methacrylic acid units are decreased in the sequence of PMAA, EMA, and PE. Remarkable matrix effects on the hole-growth profiles were observed: The holewidth in the saturated regime decreased with decreasing the polarity of the polymer matrices from 1.4 cm-1 in PMAA through 0.15 cm-1 in EMA to 0.05 cm-1 in PE. The model of the photoinduced hole broadening is proposed in relation to the nature of two-level systems of the polymer glasses which exert influence on the holewidth. Dipole-dipole coupling is possibly a dominant interaction in the present systems. The results on the annealing properties of holewidth are also discussed.
AB - Photochemical hole spectra of 1,4-dihydroxyanthraquinone in polymer matrices at liquid helium temperatures were investigated by changing the main chain structure of polymer molecules systematically. Polymer molecules adopted here were poly(ethylene-co-methacrylic acid) (EMA) and its homopolymers poly (ethylene) (PE) and poly(methacrylic acid) (PMAA). Polarity of matrices or the number density of the electric dipoles mainly localized around the methacrylic acid units are decreased in the sequence of PMAA, EMA, and PE. Remarkable matrix effects on the hole-growth profiles were observed: The holewidth in the saturated regime decreased with decreasing the polarity of the polymer matrices from 1.4 cm-1 in PMAA through 0.15 cm-1 in EMA to 0.05 cm-1 in PE. The model of the photoinduced hole broadening is proposed in relation to the nature of two-level systems of the polymer glasses which exert influence on the holewidth. Dipole-dipole coupling is possibly a dominant interaction in the present systems. The results on the annealing properties of holewidth are also discussed.
UR - http://www.scopus.com/inward/record.url?scp=36549098563&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=36549098563&partnerID=8YFLogxK
M3 - Article
AN - SCOPUS:36549098563
VL - 88
SP - 1272
EP - 1278
JO - Journal of Chemical Physics
JF - Journal of Chemical Physics
SN - 0021-9606
IS - 2
ER -