TY - JOUR
T1 - Polar laser dyes dispersed in polymer matrices
T2 - Reverification of charge transfer character and new optical functions
AU - Kwak, Giseop
AU - Okada, Chisato
AU - Fujiki, Michiya
AU - Takeda, Hiroaki
AU - Nishida, Takashi
AU - Shiosaki, Tadashi
PY - 2008/3/14
Y1 - 2008/3/14
N2 - In this paper, we describe the photophysical properties and new functions of 4-(dicyanomethylene)-2-methyl-6-(p-dimethylaminostyryl)-4H-pyran (DCM) and its derivative, 2-methyl-6-[2-(2,3,6,7-tetrahydro-1H,5H-benzo[i.j]quinolizin-9- yl)-ethenyl]-4H-pyran-4-ylidene)propane dinitrile (DCM2) in various polymer matrices, with respect to intramolecular charge transfer (ICT). The maximum fluorescence wavelengths of DCM and DCM2 shifted to red with an increase in the dielectric constant of the polymer matrix. The fluorescence lifetime shortened according to the matrix polarity. When a polymer with a dielectric constant varying according to its crystalline structure, poly(vinylidenefluoride-co- trifluoroethylene) (PVdF-co-TrFE), was used as a matrix, we were able to thermally tune the fluorescence wavelength as well as the fluorescence intensity of DCM2. The locked molecular structure of DCM2 was very effective for maintaining the charge transfer character during thermal stimulation.
AB - In this paper, we describe the photophysical properties and new functions of 4-(dicyanomethylene)-2-methyl-6-(p-dimethylaminostyryl)-4H-pyran (DCM) and its derivative, 2-methyl-6-[2-(2,3,6,7-tetrahydro-1H,5H-benzo[i.j]quinolizin-9- yl)-ethenyl]-4H-pyran-4-ylidene)propane dinitrile (DCM2) in various polymer matrices, with respect to intramolecular charge transfer (ICT). The maximum fluorescence wavelengths of DCM and DCM2 shifted to red with an increase in the dielectric constant of the polymer matrix. The fluorescence lifetime shortened according to the matrix polarity. When a polymer with a dielectric constant varying according to its crystalline structure, poly(vinylidenefluoride-co- trifluoroethylene) (PVdF-co-TrFE), was used as a matrix, we were able to thermally tune the fluorescence wavelength as well as the fluorescence intensity of DCM2. The locked molecular structure of DCM2 was very effective for maintaining the charge transfer character during thermal stimulation.
KW - Charge transfer
KW - Ferroelectric-paraelectric transition
KW - Fluorescence
KW - Polar laser dye
KW - Poly(vinylidene fluoride-co-trifluoroethylene)
KW - Polymer matrix
UR - https://www.scopus.com/pages/publications/54249134943
U2 - 10.1143/JJAP.47.1753
DO - 10.1143/JJAP.47.1753
M3 - Article
AN - SCOPUS:54249134943
SN - 0021-4922
VL - 47
SP - 1753
EP - 1756
JO - Japanese Journal of Applied Physics, Part 1: Regular Papers and Short Notes and Review Papers
JF - Japanese Journal of Applied Physics, Part 1: Regular Papers and Short Notes and Review Papers
IS - 3 PART 1
ER -