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| Title: | SYNTHESIS OF LOW BANDGAP ALTERNATING COPOLYMERS BASED ON FLUORENE-QUINOXALINE AND BENZOTHIADIAZOLE UNITS |
| Authors: | ENDALE, MULUGETA |
| Advisors: | WENDIMAGEGN MAMMO (Prof.) |
| Keywords: | chemistry
LOW BANDGAP ALTERNATING COPOLYMERS |
| Copyright: | 9-Jul-2010 |
| Date Added: | 4-May-2012 |
| Publisher: | AAU |
| Abstract: | Donor/Acceptor-Copolymers,
as
so-called
“low-band-gap”
π-conjugated
polymers, have been widely investigated and applied in different areas such as
organic photovoltaics (OPVs), organic light emitting diodes (OLEDs) and organic
field effect transistors (OFETs). Due to the attractive features of those functional
organic polymer materials such as light weight, flexibility and low cost of
production they have attracted recent interest in research development.
In the course of this project, the synthesis of polyfluorene copolymers was
attempted. Monomers based on quinoxaline, namely, 5,8-bis-(5-bromo-thiophen-
2-yl-2,3-bis(4-octyloxyphenyl)quinoxaline was successfully synthesized. Two
copolymers, namely, poly[5-(5-(9,9-bis-[2-(2-methoxy-ethoxy)-ethyl]-7-methyl-9H-
fluoren-2-yl}-thiophen-2-yl)-8-(5-methyl-thiophen-2-yl)-2,3-bis-(4-octyloxyphenyl)-
quinoxaline] and poly[5-(5-(7-(7-(9,9-bis-[2-(2-methoxy-ethoxy)-ethyl]-9H-fluoren-
2-yl)-benzo[1,2,5]thiadiazol-4-yl)-9,9-bis-[2-(2-methoxy-ethoxy)-ethyl]-9H-fluoren-
2-yl)-thiophen-2-yl)-2,3-bis-(4-octyloxy-phenyl)-8-thiophen-2-yl-quinoxaline].
Were prepared with a palladium(0)-catalyzed Suzuki-coupling polymerization
reaction
and
the
polymers
were
characterized
ix
by
NMR,
Uv-Vis
a |
| URI: | http://hdl.handle.net/123456789/2605 |
| Appears in: | Thesis - Chemistry
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