1598412-43-1Relevant articles and documents
Method of forming rigid imide material from soluble amide ester functionalized precursors
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, (2016/06/28)
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.
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
Ikai, Tomoyuki,Kudo, Tomoya,Nagaki, Masahiro,Yamamoto, Tomoyuki,Maeda, Katsuhiro,Kanoh, Shigeyoshi
, p. 2139 - 2145 (2014/05/06)
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.
