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1 to 9 of 9 Results
Mar 4, 2024 - Bunz Group
Ehjeij, Daniel; Rominger, Frank; Bunz, Uwe; Freudenberg, Jan; Müllen, Klaus, 2024, "Thermolysis of Biphenylene toward Cyclo-ortho-phenylenes [data]", https://doi.org/10.11588/data/AYVNYK, heiDATA, V1
The solvent and catalyst free thermolysis of biphenylenes at 350 °C furnishes [n]cyclo-ortho-phenylenes ([n]COPs, n=4–10) in one step and in high yields. At 400 °C biphenylene dimerizes into tetraphenylene, but lower reaction temperatures produce cyclooligomers. If suitably subst... |
Feb 1, 2024 - Bunz Group
Zong, Wansheng; Hippchen, Nikolai; Nico, Zeitter; Maier, Steffen; Philipp, Ludwig; Rominger, Frank; Freudenberg, Jan; Bunz, Uwe H. F., 2024, "Stable Azaheptacenes", https://doi.org/10.11588/data/P9AVCU, heiDATA, V1
we have developed a novel access to stable azaheptacenes and investigated both their (air-stable) radical anions as well as dianions. The two azaheptacenes are significantly more stable than reported examples. We identified their structure through NMR, IR, MS and X-ray crystallog... |
Jan 25, 2024 - Bunz Group
Ludwig, Philipp; Rominger, Frank; Freudenberg, Jan; Bunz, Uwe H. F., 2024, "Stabilization of Acenes: “Geländer”-Pentacenes [data]", https://doi.org/10.11588/data/NITIKZ, heiDATA, V1
We report soluble tetrakis-biphenyl substituted pentacenes comprised of sp2 carbons and synthesized from pentacene-5,7,12,14-tetraone. Intramolecular Yamamoto coupling of two tetrakis(chlorobiphenylyl)pentacenes yields helical, doubly wrapped pentacenes, in which the quaterphenyl... |
Nov 3, 2023 - Bunz Group
Ludwig, Philipp; Mayer, Jacob; Ahrens, Lukas; Rominger, Frank; Ligorio, Giovanni; Hermerschmidt, Felix; List-Kratochvil, Emil J.W.; Freudenberg, Jan; Bunz, Uwe H.F., 2023, "Doubly Bridged Anthracenes: Blue Emitters for OLEDs [data]", https://doi.org/10.11588/data/1MXYDJ, heiDATA, V1
The photooxidative stability of a series of doubly bridged anthracenes was evaluated after their preparation via twofold macrocyclization of a bis(resorcinyl)anthracene. Lightfastness correlates with the energy levels of the highest occupied molecular orbital (HOMO), resulting in... |
May 8, 2023 - Bunz Group
Ahrens, Lukas; Rominger, Frank; Freudenberg, Jan; Bunz, Uwe H. F., 2023, "Etheno-bridged Azaacene Spiro Dimers [data]", https://doi.org/10.11588/data/L8NDRO, heiDATA, V1
We present the synthesis of two sets of spiro-connected azaacene dimers. Their geometry and electronic coupling are critically determined by a secondary linker, i.e. an etheno- and an ethano-bridge.The core fragment of the etheno-bridged dimer corresponds to a conformationally lo... |
Aug 3, 2022 - Bunz Group
Wiesner, Thomas; Wu, Zhu; Han, Jie; Ji, Lei; Friedrich, Alexandra; Krummenacher, Ivo; Moos, Michael; Lambert, Christoph; Braunschweig, Holger; Rudin, Benjamin; Reiss, Hilmar; Tverskoy, Olena; Rominger, Frank; Dreuw, Andreas; Marder, Todd; Freudenberg, Jan; Bunz, Uwe, 2022, "The Radical Anion, Dianion and Electron Transport Properties of Tetraiodo-Tetraazapentacene [Data]", https://doi.org/10.11588/data/S0KS2I, heiDATA, V1
Tetraiodotetraazapentacene I4TAP , the last missing derivative in the series of halogenated silylated tetraazapentacenes, was synthesized via condensation chemistry from a TIPS-ethynylated diaminobenzothiadiazol in three steps. Single and double reduction furnished its air-stable... |
May 2, 2022 - Bunz Group
Ehjeij, Daniel; Hengge, Michael; Hänsch, Paul; Benneckendorf, Frank S.; Freudenberg, Jan; Bunz, Uwe H. F. Bunz; Müllen, Klaus; List-Kratochvil, Emil J. W.; Hermerschmidt, Felix, 2022, "Crosslinking Super Yellow to produce Super OLEDs: Crosslinking with Azides Enables Improved Performance [Data]", https://doi.org/10.11588/data/K7GEM8, heiDATA, V1
An increasing number of organic light-emitting diodes (OLEDs) is nowadays based on the use of polymers as the emissive material. For this material class in particular, solution-processing of the OLEDs has gained traction in both research and industry. However, in order to access... |
Feb 24, 2022 - Bunz Group
Maier, Steffen; Heckershoff, Robin; Wurm, Thomas; Biegger, Philipp; Brödner, Kerstin; Krämer, Petra; Hoffmann, Marvin; Eberle, Lukas; Stein, Jana; Rominger, Frank; Rudolph, Matthias; Freudenberg, Jan; Dreuw, Andreas; Hashmi, Stephen; Bunz, Uwe, 2022, "Cyclopentannulated Dihydrotetraazapentacenes [Data]", https://doi.org/10.11588/data/PZGMSS, heiDATA, V1
The transition-metal catalyzed cyclization of bissilylethynylated N,N’-dihydro¬tetra¬aza¬pentacene (TIPS-TAP-H2) into bissilylated cyclo¬penta¬[fg,qr]¬pentacenes is reported. Depending on the catalyst either none, one or two silyl groups migrate and change their positions in the... |
Oct 7, 2021 - Bunz Group
Maier, Steffen; Hippchen, Nikolai; Rominger, Frank; Freudenberg, Jan; Bunz, Uwe H. F., 2021, "Cyclodimers and Cyclotrimers of 2,3-Bisalkynylated Anthracenes, Phenazines and Diazatetracenes [Data]", https://doi.org/10.11588/data/24JDZD, heiDATA, V2
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