| 摘要 |
PURPOSE: A thiophen monomer, a method for preparing the same, and a polythiophen derivative and copolymer using the same thiophen monomer are provided, which polythiophen derivative and copolymer containing a Schiff-base have improved solubility and electromagnetic wave absorbing and blocking activity, so that the polythiophen derivative and copolymer are useful for producing electric/electronic devices or for controlling electromagnetic wave. CONSTITUTION: The thiophen derivative represented by formula (1) is provided, wherein R1 is hydrogen, C1-C50 alkyl or C6-C18 aryl. The method for preparing the thiophen derivative represented by formula (1) comprises the steps of: (a) reacting 2-(3-thienyl) ethanol with triphenylphosphin, phthalimide and diisopropylcarbodiimide to prepare a thiophen intermediate containing phthalimide; (b) reacting the thiophen intermediate with hydrazine to prepare a thiophen derivative in which phthalimide is removed and an amine group is substituted; (c) reacting 2,4-dihydroxybenzaldehyde with alkylhalide or arylhalide to prepare an aryl substituted benzaldehyde derivative; and (d) reacting the amine substituted thiophen derivative of step (b) with the aryl substituted benzaldehyde derivative of step (c). The polythiophen derivative represented by formula (3) is provided, wherein R1 is hydrogen, C1-C50 alkyl or C6-C18 aryl; and n is 2 to 100,000. The polythiophen copolymer represented by formula (4) is provided, wherein R1 is hydrogen, C1-C50 alkyl or C6-C18 aryl; R2 is hydrogen, C1-C50 alkyl, C1-C50 alkyl oxy, C1-C50 alkylcarbonyl oxy or C6-C18 aryl; n is 2 to 100, 000; and x is a mole ratio.
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