4th EucheMs chemistry congress

Poster Session 2
s1293
chem. Listy 106, s257–s1425 (2012)
Poster session 2 - organic chemistry
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AdAPtAtion of iMine ConStituentS in
dynAMiC CovALent SySteMS under
reverSiBLe PhASe SePArAtion
n. hAfezi 1 , J. M. Lehn 1
1 Institut de Science et d’Ingenierie Supramoleculaires,
Chemistry, Strasbourg, France
The dynamic selection of interconverting imines has been
achieved by the reversible separation of a homogeneous liquid
phase into two non-miscible phases by the action of either a
physical stimulus or by addition of a chemical effector. This
results in the re-organization of a dynamic library based on the
medium preference of the library members. Moreover, we
demonstrate reversibility in the library re-organization by
interconversion between the biphasic mixture and the
homogeneous solution. Finally, we note that such processes
provide access to dynamic non-equilibrium systems.
Keywords: Exchange interactions; Molecular evolution; Schiff
bases; Amines; Aldehydes;
4 th EucheMs chemistry congress
P - 0 8 6 1
ConJuGAted donor-ACCePtor-CoPoLyMerS
for PoLyMer SoLAr CeLLS
M. d. hAGer 1 , d. SChMidt 1 , f. KretSChMer 1 ,
o. SynooKA 2 , h. hoPPe 2 , u. S. SChuBert 1
1 Friedrich-Schiller-University Jena, Laboratory of Organic and
Macromolecular Chemistry (IOMC), Jena, Germany
2 Technical University Ilmenau, Institute for Physics, Ilmenau,
Germany
One of the most-promising donor materials for polymer
solar cells (bulk heterojunction solar cells with polymer/fullerene
blends) are donor-acceptor copolymers. Currently, there is a quest
for new materials to achieve solar cells with higher efficiencies.
More and more complex building blocks are synthesized and
incorporated into polymeric materials.
Another possibility for the optimization of the polymer
structures is the combination of different building blocks within
one polymer. Some examples, which are described in the
literature, of random copolymers, which contain two or three
different building blocks, showed promising performance in solar
cells. They revealed higher efficiencies than both homopolymers.
In this context, we report the systematic synthesis of three
different donor-acceptor-copolymer libraries, which contain two
different acceptor moieties. The optical and electronic properties
of these copolymer libraries were investigated in detail. The
absorption of these polymers is broadened due to the presence of
two different acceptor moieties within the polymers. Moreover,
the emission of these materials is governed by the acceptor
moiety, which features the lower energy.
The performance of the random copolymers in polymer
solar cells was investigated in detail. Additionally the
corresponding homopolymers and blends of two homopolymers
have been studied in solar cell tests in order to investigate the
influence of the copolymerization of two different acceptor
moieties. Some of these copolymers featured higher efficiencies
than the homopolymers and their mixtures. The influence of the
polymer composition and of the combination of different acceptor
moieties on the performance of random copolymers in solar cells
will be discussed in detail.
Keywords: Conducting materials; Polymers; Combinatorial
chemistry; Donor-acceptor systems;
AUGUst 26–30, 2012, PrAGUE, cZEcH rEPUbLIc