1 to 10 of 22 Results
Mar 4, 2024
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
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
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... |
Jan 22, 2024
Zeitter, Nico; Hippchen, Nikolai; Baur, Philipp; Unterreiner, Tamara; Freudenberg, Jan; Rominger, Frank; Bunz, Uwe, 2024, "Pentacene to Octacene: The Limit of Fourfold TIPS-Ethynylation [data]", https://doi.org/10.11588/data/DDJFGS, heiDATA, V1
Soluble acenes beyond hexacene are rare. Their sensitivity complicates isolation, purification and application in devices. To increase the stability of acenes, functionalization with trialkylsilylethynyl substituents prevents [4+4] dimerization and oxidation. At the same time suc... |
Zong, Wansheng; Hippchen, Nikolai; Dittmar, Benedikt; Elter, Maximilian; Ludwig, Philipp; Rominger, Frank; Freudenberg, Jan; Bunz, Uwe H. F., 2024, "Halogenated Phenazinothiadiazoles: Electron Transporting Materials [data]", https://doi.org/10.11588/data/PKX5CI, heiDATA, V1, UNF:6:M6UVaar224tmBy3Sj1o9jg== [fileUNF]
Triisopropylsilyl-(TIPS)-alkynylated phenazinothiadiazoles were prepared by the condensation of halogenated ortho-quinones and TIPS-alkynylated 5,6-diamino-2,1,3-benzothiadiazole with different combinations of halogen substituents. The compounds pack in brickwall motif of head-to... |
Nov 3, 2023
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... |
Aug 8, 2023
Zeitter, Nico; Hippchen, Nikolai; Weidlich, Anna; Jäger, Patrick; Ludwig, Philipp; Dr. Rominger, Frank; Dr. Freudenberg, Jan; Prof. Dr. Dreuw, Andreas; Prof. Dr. Bunz, Uwe H. F, 2023, "Hexakis-TIPS-Alkynylated Nonacenes: Persistent and Processible [data]", https://doi.org/10.11588/data/TFFFN4, heiDATA, V1
We prepared and characterized (UV-vis, epr, X-ray) four substituted nonacenes. They are the most stable and soluble nonacenes to date – due to six strategically placed triisopropylsilyl (TIPS)-ethynyl groups. They are stable for several weeks in the solid state. In dilute solutio... |
May 31, 2023
Fuchs, Kathleen; Dr. Rivero, Samara M.; Weidlich, Anna; Dr. Rominger, Frank; Israel, Noel; Dr. Popov, Alexey A.; Prof. Dreuw, Andreas; Dr. Freudenberg, Jan; Prof. Casado, Juan; Prof. Bunz, Uwe, 2023, "Dimerization of a Reactive Azaacene Diradical: Synthesis of a Covalent Azaacene Cage [Data]", https://doi.org/10.11588/data/QO118B, heiDATA, V1
Two series of regioisomeric dicyanomethylene substituted dithienodiazatetracenes with formal para- or ortho- quinodimethane subunits were synthesized and characterized. Whereas the para-isomers (p-n, diradical index y0=0.01) are stable and isolable, the ortho-isomer (y0=0.98) dim... |
May 8, 2023
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... |
Apr 4, 2023
Hippchen, Nikolai; Heinzel, Elena; Zhang, Cathy K.; Jäger, Patrick; Elter, Maximilian; Ludwig, Philipp; Rominger, Frank; Freudenberg, Jan; Cao, Dennis D.; Bunz, Uwe H. F., 2023, "Second Generation of Cata-Annulated Azaacene Bisimides: Towards Electron Accepting Materials [research data]", https://doi.org/10.11588/data/U9IRYY, heiDATA, V1
Herein we provide the reserach data for the puplication: "Second Generation of Cata-Annulated Azaacene Bisimides: Towards Electron Accepting Materials". Where we present the second generation of cata-annulated azaacene bisimides with increased electron affinities compared to thei... |
