Dr. Jan Freudenberg

List of Publications

1. K.-P. Strunk, M. Bojanowski, C. Huck, M. Bender, L. Veith, M. Tzschoppe, J. Freudenberg, I. Wacker, R. Schroeder, A. Pucci, C. Melzer, U. H. F. Bunz:
   "Electron-Beam Irradiation of Cinnamate Films Affords Nanoscale Patterned Substrates for Use in Devices and as Scaffolds in Tissue Engineering".
   ACS Appl. Nano Mater. 2020, Accepted Article.
    
2. H. Zhang, E. Kotlear, S. Kushida, S. Maier, F. Rominger, J. Freudenberg, U. H. F. Bunz:
   "Linear and Star-Shaped Extended Di- and Tristyrylbenzenes: Synthesis, Characterization and Optical Response to Acid and Metal Ions".
   Chem. Eur. J. 2020, Accepted Article.
    
3. S. Intorp, M. Hodecker, M. Müller, O. Tverskoy, M. Rosenkranz, E. Dmitrieva, A. Popov, F. Rominger, J. Freudenberg, A. Dreuw, U. H. F. Bunz:
   "Quinoidal Azaacenes: 99% Diradical Character".
   Angew. Chem. Int. Ed. 2020, Accepted Article.
    
4. D. Burmeister, L.Ahrens, A. Opitz, G. Ligorio, F. Hermerschmidt, D. Jänsch, J. Freudenberg, U. H. F. Bunz, K. Muellen, E. J. W. List-Kratochvil:
   "Utilizing Diels-Alder "Click" Chemistry to Functionalize the Organic-Organic Interface of Semiconducting Polymers".
   J. Mater. Chem. C 2020, 8, 3302-3307.
   Highlighted as Back Cover.
    
5. F. Benneckendorf, V. Rohnacher, E. Sauter, S. Hillebrandt, M. Münch, C. Wang, S. Casalini, K. Ihrig, S. Beck, D. Jänsch, J. Freudenberg, W. Jaegermann, P. Samori, A. Pucci, U. H. F. Bunz, M. Zharnikov, K. Müllen:
   "A Tetrapodal Diazatriptycene Enforces Orthogonal Orientation in Self-Assembled Monolayers".
   ACS Appl. Mater. Interfaces 2020, 12, 656-6572.
    
6. M. Müller, S. Maier, O. Tverskoy, F. Rominger, J. Freudenberg, U. H. F. Bunz:
   "Tetrabenzononacene: "Butterfly Wings" Stabilize the Core".
   Angew. Chem. Int. Ed. 2020, 59, 1966-1969.
    
7. V. Brosius, M. Müller, J. Borstelmann, F. Rominger, J. Freudenberg, U. H. F. Bunz:
   "Azaacenodibenzosuberones".
   J. Org. Chem. 2020, 85, 296-300.
    
8. L. Ahrens, J. Butscher, V. Brosius, F. Rominger, J. Freudenberg, Y. Vaynzof, U. H. F. Bunz:
   "Azaacene Dimers - Novel Acceptor Materials with a ‘Twist’".
   Chem. Eur. J. 2020, 26, 799-803.
    
9. H. Reiss, F. Rominger, J. Freudenberg, U. H. F. Bunz:
   "Peralkynylated Tetraazaacene-Derivatives".
   Chem. Eur. J. 2020, 26, 1013-1016.
    
10. G. Xie, M. Hauschild, H. Hoffmann, L. Ahrens, F. Rominger, M. Borkowski, T. Marszalek, J. Freudenberg, M. Kivala, U. H. F. Bunz:
    "5,7,12,14-Tetrafunctionalized 6,13-Diazapentacenes".
    Chem. Eur. J. 2020, 26, 799-803.
     
11. G. Xie, V. Brosius, J. Han, F. Rominger, A. Dreuw, J. Freudenberg, U. H. F. Bunz:
    "Stable Radical Cations of N,N’-Diarylated Dihydrodiazapentacenes".
    Chem. Eur. J. 2020, 26, 160-164.
     
12. E. Rüdiger, M. Müller, J. Freudenberg, U. H. F. Bunz:
    "Starphenes and Phenes: Structures and Properties".
    Organic Materials 2019, 1, 1-18.
     
13. M. Müller, L. Ahrens, V. Brosius, J. Freudenberg, U. H. F. Bunz:
    "Unusual Stabilization of Larger Acenes and Heteroacenes".
    J. Mater. Chem. C 2019, 7, 14011-14034.
     
14. L. Ahrens, S. Hahn, F. Rominger, J. Freudenberg, U. H. F. Bunz:
    "N-Acenoacenes".
    Chem. Eur. J. 2019, 25, 14522-14526.
     
15. M. Casutt, M. Ruscello, N. Strobel, S. Koser, U. H.F. Bunz, D. Jänsch, J. Freudenberg, G. Hernandez-Sosa, K. Müllen:
    "Diketopyrrolopyrrole-Polymer Meets Thiol-Ene Click Chemistry: A Crosslinked Acceptor for Thermally Stable Near-Infrared Photodetectors".
    Chem. Mater. 2019, 31, 7657-7665.
     
16. H. Hoffmann, D. Mukanov, M. Ganschow, F. Rominger, J. Freudenberg, U. H. F. Bunz:
    "2,3-Dihalo- and 2,3,6,7-Tetrahaloanthracenes by Vollhardt Trimerization".
    J. Org. Chem. 2019, 84, 9826-9834.
     
17. A. Abdulkarim, K.-P. Strunk, R. Bäuerle, S. Beck, H. Makowska, T. Marszalek, A. Pucci, C. Melzer, D. Jänsch, J. Freudenberg, U. H. F. Bunz, K. Müllen:
    "Small Change, Big Impact: The Shape of Precursor Polymers Governs Poly-p-phenylene Synthesis".
    Macromolecules 2019, 52, 4458-4463.
     
18. H. Zhang, F. Rominger, U. H. F. Bunz, J. Freudenberg:
    "Aggregation-Induced Emission of Triphenyl-Substituted Tristyrylbenzenes".
    Chem. Eur. J. 2019, 25, 11218-11222.
    Highlighted as Cover Feature.
     
19. U. H. F. Bunz, J. Freudenberg:
    "N-Heteroacenes and N-Heteroarenes as N-Nanocarbon Segments".
    Acc. Chem. Res. 2019, 52, 1575-1587.
     
20. L. Ji, S. Hahn, P. Biegger, H. Reiss, J. Han, A. Friedrich, I. Krummenacher, H. Braunschweig, M. Moos, J. Freudenberg, C. Lambert, A. Dreuw, T. Marder, U. H. F. Bunz:
    "Mono- and Dianion of a Bis(benzobuta)tetraazapentacene Derivative".
    Chem. Eur. J. 2019, 25, 9840-9845.
     
21. P. Reiser, F. Benneckendorf, M.-M. Barf, L. Müller, R. Bäuerle, S. Hillebrandt, S. Beck, R. Lovrincic, E. Mankel, J. Freudenberg, D. Jänsch, W. Kowalsky, A. Pucci, W. Jaegermann, U. H. F. Bunz, K. Müllen:
    "N-Type Doping of Organic Semiconductors: Immobilization via Covalent Anchoring".
    Chem. Mater. 2019, 31, 4213-4221.
     
22. K.-P. Strunk, A. Abdulkarim, S. Beck, T. Marszalek, J. Bernhardt, S. Koser, W. Pisula, D. Jänsch, J. Freudenberg, A. Pucci, U. H. F. Bunz, C. Melzer, K. Müllen:
    "Pristine Poly(para-phenylene): Relating Semi-Conducting Behavior to Kinetics of Precursor Conversion".
    ACS Appl. Mater. Interfaces 2019, 11, 19481-19488.
     
23. M. Müller, S. Koser, O. Tverskoy, F. Rominger, J. Freudenberg, U. H. F. Bunz:
    "Thiadiazolo-Azaacenes".
    Chem. Eur. J. 2019, 25, 6082-6086.
    Highlighted as Cover Feature.
     
24. S. Intorp, S. Kushida, E. Dmitrieva, A. Popov, F. Rominger, J. Freudenberg, F. Hinkel, U. H. F. Bunz:
    "True Blue Through Oxidation – A Thiaazulenic Heterophenoquinone as Electrochrome".
    Chem. Eur. J. 2019, 25, 2723-2728.
    Highlighted as Inside Cover Picture.
     
25. M. Casutt, B. Dittmar, H. Makowska, T. Marszalek, S. Kushida, U. H. F. Bunz, J. Freudenberg, D. Jaensch, K. Müllen:
    "A Diketopyrrolopyrrole-based Dimer as Blue Pigment".
    Chem. Eur. J. 2019, 25, 2723-2728.
     
26. 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, 2019, 1-25.
     
27. 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.
     
28. 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, 24, 13667-13675.
     
29. 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.
     
30. 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.
     
31. 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.
     
32. 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.
     
33. J. Freudenberg, D. Jänsch, F. Hinkel, U. H. F. Bunz:
    "Immobilization Strategies for Organic Semiconducting Conjugated Polymers".
    Chem. Rev. 2018, 118, 5598-5689.
     
34. 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.
     
35. 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.
     
36. 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.
     
37. 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.
     
38. 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.
     
39. 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
     
40. 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.
     
41. 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.
     
42. 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.
     
43. 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.
     
44. 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.
     
45. 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.
     
46. 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
     
47. 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.
     
48. 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
     
49. U. H. F. Bunz, J. Kumpf, J. Freudenberg:
    "Distyrylbenzene-aldehydes: identification of proteins in water".
    Analyst 2015, 140, 3136-3142.
     
50. 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.
     
51. 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.
     
52. 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.
     
53. 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.
     
54. 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. 27 Mar 2020 - "Kohlenstoff statt Silizium: Grundlagen der organischen Elektronik"
   Festvortrag des Heidelberger Life-Science-Lab, Deutsches Krebsforschungszentrum, Heidelberg, Germany
    
2. 05 Nov 2018 - "Novel π-Extended Acenes and Heteroacenes"
   π-System Figuration European-Japanese Workshop, Dubrovnik, Croatia
    
3. 14 Nov 2017 - "New AIE-gens and Their Properties"
   π-System Figuration Tagung SFB 1249, Heidelberg, Germany
    
4. 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
   
• Advanced Optical Materials
   
• Journal for Photonics and Energy