Process for preparing thieno[3,4-B] pyrazine copolymers,thieno[3,4-B]—pyrazine copolymers prepared by this process, and their use
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United States of America Patent
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Jul 10, 2012
Grant Date -
Sep 10, 2009
app pub date -
Mar 22, 2007
filing date -
Mar 24, 2006
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Expired
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Abstract
New thieno[3,4-b]pyrazine copolymers are prepared by reacting 5,7-functionalized thieno[3,4-b]pyrazines with substituted aromatics in the presence of solvents, bases and polymerization catalysts, the copolymers thus prepared being employed preferably in the production of photovoltaic cells.
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