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Project Description

Synthetic Approaches to Semiconducting Polymers

Our research team is interested in the synthesis of semiconducting polymers including redox polymers e.g. based on triarylamine moieties [1] and conjugated polymers based on thiophene units [2]. Applications for these material systems are organic solar cells, electrochromic windows and sensors. 

In the case of conjugated thiophene polymers we focus on 2D- or 3D- architectures of such systems and managed recently to synthesize and characterize hyperbranched polythiophenes starting from branched monomer systems (2,2’:3’,2’’-terthiophene (3T)) - using either oxidative [3], Ni-catalyzed [4] or electro-polymerization [5] methods.

Our synthetic approaches include copolymerization of the branched 3T with comonomers such as EDOT to allow energy level tuning [5] and the introduction of ionic endgroups via polymer analogous reactions to yield conjugated polyelectrolytes [6]. Furthermore we are interested in linear polythiophene systems which bear alkylthiophene side chains. [7] In this case we study for example the crystallization tendency as function of different alkyl side chains. 

[1]  E.J.W. Crossland, S. Scroggins, S. Moratti, O. Yurchenko, U. Steiner, M. Hillmyer, S. Ludwigs, ACS Nano 2010, 4, 962.
[2]  M. Scheuble, M. Goll, S. Ludwigs, Macromol. Rapid Commun. 2014, DOI: 10.1002/marc.201400525. 
[3]  T.V. Richter, S. Link, R. Hanselmann, S. Ludwigs, Macromol. Rapid Commun. 2009, 30, 1323-1327. 
[4]  M. Scheuble, T.V. Richter, M. Goll, S. Link, J.T. Lopez Navarrete, A. Ruff, M.C. Ruiz Delgado, S. Ludwigs, Polym. Chem. 2014, 5, 6824-6833.
[5]  S. M. Link, M. Scheuble. M. Goll, E. Muks, A. Ruff, A. Hoffmann, T.V. Richter, J.T. López Navarrete, M.C. Ruiz Delgado, S. Ludwigs, Langmuir 2013, 29, 15463-15473.
[6]  T.V. Richter, C. Bühler, S. Ludwigs, J. Am. Chem. Soc. 2012, 134, 43–46. 
[7]  T.V. Richter, C.H. Braun, S. Link, M. Scheuble‚ E.J.W. Crossland, F. Stelzl, U. Würfel, S. Ludwigs, Macromolecules 2012, 45, 5782-5788.