- Method of forming rigid imide material from soluble amide ester functionalized precursors
-
This invention relates to a method for making soluble precursors to imides, polyimides, and polymers containing imide groups, and a method of making thin films of the same by solution casting and then removing the solubilizing group to produce thermally stable and insoluble materials.
- -
-
-
- PREPARATION AND PROPERTIES OF PERYLENE AND NAPHTHALENE POLYIMIDES AND OTHER RIGID CONJUGATED POLYMERS VIA SOLUBLE AMIDE-ESTER PRECURSOR
-
This invention relates to a method for making soluble precursors to imides, polyimides, and polymers containing imide groups, and a method of making thin films of the same by solution casting and then removing the solubilizing group to produce thermally stable and insoluble materials.
- -
-
Page/Page column
(2014/08/07)
-
- Fine tuning of frontier orbital energy levels in dithieno[3,2-b:2′, 3′-d]silole-based copolymers based on the substituent effect of phenyl pendants
-
A series of dithieno[3,2-b:2′,3′-d]silole-based π-conjugated copolymers containing thieno[3,4-c]pyrrole-4,6-dione or thieno[3,4-b]thiophene units bearing 4-substituted phenyl pendants were synthesized and their thermal stability, optical properties and frontier orbital energy levels were systematically investigated. The introduction of electron-withdrawing substituents on the phenyl rings lowered their frontier orbital energy levels without deteriorating their thermal and optical properties. By replacing an electron-donating methoxy group with an electron-withdrawing trifluoromethyl group, both the highest occupied molecular orbital (HOMO) and the lowest unoccupied molecular orbital energy levels of the polymers were deepened by more than 0.3 eV. A relatively linear relationship was observed between the HOMO energy levels and the Hammett substituent constants.
- Ikai, Tomoyuki,Kudo, Tomoya,Nagaki, Masahiro,Yamamoto, Tomoyuki,Maeda, Katsuhiro,Kanoh, Shigeyoshi
-
p. 2139 - 2145
(2014/05/06)
-