Dr. Jan Freudenberg


Dr. Jan Freudenberg

Speyerer Str. 4
69115 Heidelberg

Organisch-Chemisches Institut
Ruprecht-Karls-Universität Heidelberg
Im Neuenheimer Feld 271
69120 Heidelberg

contact via email
Phone: +49 (0) 6221 54 6226

List of Publications

  1. J. Freudenberg, U. H. F. Bunz:
    "Perarylation as a Strategy Toward Aggregation-Induced Emitters: Will They Ever Be Stable?"
    In: Y. Tang, B.-Z. Tang (Eds.): Principles and Applications of Aggregation-Induced Emitters. Springer, Cham, 2018, 1-25.

  2. M. Müller, H. Reiss, O. Tverskoy, F. Rominger, J. Freudenberg, U. H. F. Bunz:
    "Stabilization by Benzannulation: Butterfly-Azaacenes".
    Chem. Eur. J. 2018, 24, 12801-12805.

  3. M. Ganschow, S. Koser, M. Hodecker, F. Rominger, J. Freudenberg, A. Dreuw, U. H. F. Bunz:
    "Azaacenes Bearing Five-Membered Rings".
    Chem. Eur. J. 2018, Accepted Article.

  4. F. Benneckendorf, S. Hillebrandt, F. Ullrich, V. Rohnacher, S. Hietzschold, D. Jänsch, J. Freudenberg, S. Beck, E. Mankel, W. Jaegermann, A. Pucci, U. H. F. Bunz, K. Müllen:
    "Structure-Property Relationship of Phenylene-Based Self-Assembled-Monolayers for Record Low Work Function of Indium Tin Oxide".
    J. Phys. Chem. Lett. 2018, 9, 3731-3737.

  5. M. Ackermann, J. Freudenberg, D. Jänsch, F. Rominger, U. H. F. Bunz, K. Müllen:
    "Palladium-Catalyzed Dimerization of Bis(2-biphenylyl)-acetylene towards Sterically Hindered Acephenanthrylene".
    Org. Lett. 2018, 20, 3758-3761.

  6. L. Ahrens, S. Schlisske, K.-P. Strunk, F. Hinkel, C. Melzer, U. H. F. Bunz, U. Lemmer, G. Hernandez-Sosa, D. Jänsch, J. Freudenberg, K. Müllen:
    "Solubility Modulation of Polyfluorene Emitters by Thermally Induced (Retro)-Diels-Alder-Crosslinking of Cyclopentadienyl Substituents".
    Chem. Mater. 2018, 30, 4157-4167.

  7. H. Reiss, L. Ji, J. Han, S. Koser, O. Tverskoy, J. Freudenberg, F. Hinkel, M. Moos, A. Friedrich, I. Krummenacher, C. Lambert, H. Braunschweig, A. Dreuw, T. Marder, U. H. F. Bunz:
    "Bromination Improves the Electron Mobility of Tetraazapentacene".
    Angew. Chem. Int. Ed. 2018, 57, 9543-9547.
    "Tetrabromtetraazapentacen: erhöhte Elektronenbeweglichkeit".
    Angew. Chem.
    2018, 130, 9688-9692.

  8. J. Freudenberg, D. Jänsch, F. Hinkel, U. H. F. Bunz:
    "Immobilization Strategies for Organic Semiconducting Conjugated Polymers".
    Chem. Rev. 2018, 118, 5598-5689.

  9. G. Xie, S. Hahn, F. Rominger, J. Freudenberg, U. H. F. Bunz:
    "Synthesis and Characterization of Two Different Azarubrenes".
    Chem. Comm. 2018, 54, 448-454.
    Highlighted as Inside Front Cover.

  10. A. Uptmoor, F. Geyer, F. Rominger, J. Freudenberg, U. H. F. Bunz:
    "Tetrahedral Tetrakis(p-ethynylphenyl)-Group IV-Compounds in Microporous Polymers: Effect of Tetrel on Porosity".
    ChemPlusChem 2018, 83, 448-454.

  11. E. Rüdiger, S. Koser, F. Rominger, J. Freudenberg, U. H. F. Bunz:
    "Yamamoto Coupling for the Synthesis of Benzophenes and Acene-based Cyclooctatetraenes".
    Chem. Eur. J. 2018, 24, 9919-9927.
    Featured in Synfacts.

  12. M. Müller, E. Rüdiger, S. Koser, O. Tverskoy, F. Rominger, F. Hinkel, J. Freudenberg, U. H. F. Bunz:
    ""Butterfly Wings" Stabilize Heptacene"".
    Chem. Eur. J. 2018, 24, 8087-8091.

  13. A. C. Uptmoor, R. Ilyas, S. M. Elbert, I. Wacker, R. R. Schröder, M. Mastalerz, J. Freudenberg, U. H. F. Bunz:
    "Optical Properties and Sequence Information of Tin-Centered Conjugated Microporous Polymers".
    Chem. Eur. J. 2018, 24, 1674-1680.

  14. E. C. Rüdiger, M. Müller, S. Koser, F. Rominger, J. Freudenberg, U. H. F. Bunz:
    "Dibenzohexacene: Stabilization Through Additional Clar Sextets".
    Chem. Eur. J. 2018, 24, 1036-1040.
    Highlighted as Inside-Backcover

  15. N. Jürgensen, A. Kretzschmar, S. Höfle, J. Freudenberg, U. H. F. Bunz, G. Hernandez-Sosa:
    "Sulfone-Based Deep Blue TADF Emitters: Solution-Processed OLEDs with High Efficiency and Brightness".
    Chem. Mater. 2017, 29, 9154–9161.

  16. J. Freudenberg, F. Hinkel, D. Jänsch, U. H. F. Bunz:
    "Chemical Tongues and Noses Based upon Conjugated Polymers".
    Top. Curr. Chem. 2017, (Z) 375, 67.

  17. M. Ganschow, S. Koser, S. Hahn, F. Rominger, J. Freudenberg, U. H. F. Bunz:
    "Dibenzobarrelene-Based Azaacenes: Emitters in Organic Light-Emitting Diodes".
    Chem. Eur. J.
    2017, 23, 4415-4421.

  18. A. Abdulkarim, F. Hinkel, D. Jänsch, J. Freudenberg, F. E. Golling, K. Müllen:
    "A New Solution to an Old Problem: Synthesis of Unsubstituted Poly(para-phenylene)".
    J. Am. Chem. Soc.
    2016, 138, 16208-16211.

  19. S. Stolz, M. Petzoldt, N. Notadiya, T. Rödlmeier, R. Eckstein, J. Freudenberg, U. H. F. Bunz, U. Lemmer, E. Mankel, M. Hamburger, G. Hernandez-Sosa:
    "One-step additive crosslinking of conjugated polyelectrolyte interlayers: Improved lifetime and performance of solution-processed OLEDs".
    J. Mater. Chem. C 2016, 4, 11150-11156.

  20. F. Hinkel, J. Freudenberg, U. H. F. Bunz:
    "A Stable p-Conjugated Singlet Biradical".
    Angew. Chem. Int. Ed.
    2016, 55, 9830–9832.
    "Ein stabiles p-konjugiertes Singulett-Biradikal".
    Angew. Chem. 2016, 128, 9984–9986.

  21. J. Freudenberg, F. Rominger, U. H. F. Bunz:
    "Suppression of Photocyclization: Stabilization of an Aggregation-Induced Tetraaryldistyrylbenzene-Emitter".
    Chem. Eur. J. 2016, 22, 8740-8744.
    Highlighted as Frontispiece

  22. A. Uptmoor, J. Freudenberg, S. Schwäbel, F. Paulus, F. Rominger, F. Hinkel, U. H. F. Bunz:
    "Reverse Engineering of Conjugated Microporous Polymers: Defect Structures of Tetrakis(4-ethynylphenyl)stannane Networks".
    Angew. Chem. Int. Ed. 2015, 54, 14673-14676.
    ""Sequenzanalyse" konjugierter, mikroporöser Polymere (CMPs): Defektstrukturen eines Tetrakis(4-ethinylphenyl)stannan-Netzwerks".
    Angew. Chem. 2015, 127, 14885-14888.

  23. J. Freudenberg, F. Rominger, U. H. F. Bunz:
    "New Aggregation-Induced Emitters: Tetraphenyldistyrylbenzenes".
    Chem. Eur. J. 2015, 21, 16749-16753.
    Highlighted as Inside Cover and featured in Synfacts

  24. U. H. F. Bunz, J. Kumpf, J. Freudenberg:
    "Distyrylbenzene-aldehydes: identification of proteins in water".
    Analyst 2015, 140, 3136-3142.

  25. J. Freudenberg, A. Uptmoor, F. Rominger, U. H. F. Bunz:
    "Photolability of Per-Arylated Butadienes: En Route to Dihydronaphthalenes".
    J. Org. Chem. 2014, 79, 11787-11791.

  26. U. H. F. Bunz, K. Seehafer, F. L. Geyer, M. Bender, I. Braun, E. Smarsly, J. Freudenberg:
    "Porous Polymers Based on Aryleneethynylene Building Blocks".
    Macromol. Rapid Comm. 2014, 35, 1466-1496.

  27. J. Kumpf, J. Freudenberg, K. Fletcher, A. Dreuw, U. H. F. Bunz:
    "Detection of Amines with Extended Distyrylbenzenes by Strip Assays".
    J. Org. Chem. 2014, 79, 6634-6645.

  28. J. Kumpf, J. Freudenberg, S. T. Schwaebel, U. H. F. Bunz:
    "Amine Sensing with Distyrylbenzenes and Their Hexamethylene-Linked Polymers: Spraying Them On".
    Macromolecules 2014, 47, 2569-2573.

  29. J. Freudenberg, J. Kumpf, V. Schäfer, E. Sauter, S. J. Wörner, K. Brödner, A. Dreuw, U. H. F. Bunz:
    "Water-Soluble Cruciforms and Distyrylbenzenes: Synthesis, Characterization, and pH-Dependent Amine-Sensing Properties".
    J. Org. Chem. 2013, 78, 4949-4959.

List of Invited Lectures

  1. 05 Nov 2018 - "Novel π-Extended Acenes and Heteroacenes"
    π-System Figuration European-Japanese Workshop, Dubrovnik, Croatia

  2. 14 Nov 2017 - "New AIE-gens and Their Properties"
    π-System Figuration Tagung SFB 1249, Heidelberg, Germany

  3. 27 March 2017 - "Solubility Reduction of Active Materials for Printed Organic Electronics"
    European Hengstberger Symposium New Horizons in Smart Materials, Heidelberg, Germany

Reviewer Activities for Scientific Journals

  • Chemistry of Materials

  • Chemistry - A European Journal

  • Journal for Photonics and Energy