polyimides were 7.398 eV (À9.248 eV ! À1.850 eV), 7.404 eV (À9.211 eV !
À1.807 eV), and 9.098 eV (À9.209 eV ! À0.111 eV), respectively. These results
indicate that the intermolecular cross-link type photoreactivity can be increased by
reducing the transition energy from e HOMO to e LUMO .
Fig. 22 Calculated
absorption spectra of TeMPDbased polyimides and
polyamides. (Reprinted with
permission from
J. Photopolym. Sci. Technol.
26, 769. (Copyright (2013)
The Society of Photopolymer
Science and Technology))
Fig. 23 Fluorescence spectra
of LPUV-irradiated and
unirradiated TeMPD-based
polyimides and polyamides
excited at 325 nm. (Reprinted
with permission from
J. Photopolym. Sci. Technol.
26, 769. (Copyright (2013)
The Society of Photopolymer
Science and Technology))
18 Photoalignment of Liquid Crystal Molecules Using Fluorine-Containing. . .
519