SUPPORTING INFORMATION
Temperature Dependence of Electric Conduction in Polyimides having a
Triphenylamine Structure in the Main Chain
Kazuhiro Takizawa, Shigeo Asai and Shinji Ando*
Dept. of Chemistry & Materials Science, Tokyo Institute of Technology, Ookayama 2-12-1-E4-5,
Meguro-ku, Tokyo 152-8552, Japan
Tel: +81-3-5734-2137, Fax: +81-3-5734-2889, E-mail: sando@polymer.titech.ac.jp
ATR-IR spectra of Polyimide Films.
The ATR-IR spectra of Polyimide (PI) Films indicate that thermal imidization of these PI films was
completed. The PIs exhibit strong symmetric and asymmetric imide N-CO- stretching peaks at around
1710 and 1770 cm-1, respectively, and they do not exhibit amide C-N peak at around 1540 cm-1.
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Figure S1. ATR-IR spectra of PI films; (a) PMDA/DATPA, (b) s-BPDA/DATPA, (c) PMDA/ODA,
(d) s-BPDA/PPD, (e) PMDA/DCHM and (f) s-BPDA/DCHM.
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Calculation of Optical Bandgap of Polyimide Films.
Optical bandgap of PMDA/DATPA, PMDA/ODA and PMDA/DCHM were estimated from the
UV/vis absorption spectra of ca. 1 m-thick films. The arrows in the figures indicate the positions of
bandgap.
Figure S2. Estimation of optical bandgap of PMDA/DATPA PI film (Egopt = 1.94 eV).
Figure S3. Estimation of the optical bandgap of PMDA/ODA PI film (Egopt = 2.70 eV).
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Figure S4. Estimation of the optical bandgap of PMDA/DCHM PI film (Egopt = 3.40 eV).
Figure S5. Estimation of the optical bandgap of s-BPDA/DATPA PI film (Egopt = 2.38 eV).
Figure S6. Estimation of the optical bandgap of s-BPDA/PPD PI film (Egopt = 3.10 eV).
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Figure S7. Estimation of the optical bandgap of s-BPDA/DCHM PI film (Egopt = 3.35 eV).
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The elapsed time dependence of current density of Polyimide Films.
Figures S8-S9 show the elapsed time dependence of current density of PI films in the temperature
range of 40−230°C under a DC electric field of at 5 kVcm-1 and 50 kVcm-1.
Figure S8. The elapsed time dependence of current density of PI films in the temperature range of
40−230°C under an electric field of at 5 kVcm-1; (a) PMDA/DATPA (2.4 m-thick), (b) sBPDA/DATPA (1.7 m)
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Figure S9. The elapsed time dependence of current density of PI films in the temperature range of
40−230°C under an electric field of at 50 kVcm-1; (a) PMDA/DATPA (9.0 m-thick), (a) PMDA/ODA
(2.4 m), (c) PMDA/DCHM (3.2 m), (d) s-BPDA/PPD (2.8 m), (e) s-BPDA/DCHM (3.7 m).
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