21 to 30 of 34 Results
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... |
Mar 15, 2024 - SFB 1249: N-Heteropolyzyklen als Funktionsmaterialien - B: Theory & Structure
Kefer, Oskar; Ahrens, Lukas; Han, Jie; Wollscheid, Nikolaus; Misselwitz, Erik; Rominger, Frank; Freudenberg, Jan; Dreuw, Andreas; Bunz, Uwe H. F.; Buckup, Tiago, 2024, "Efficient Intramolecular Singlet Fission in Spiro-Linked Heterodimers [research data]", https://doi.org/10.11588/data/HMRSVO, heiDATA, V1
We investigate intramolecular singlet fission (iSF) of spiro-linked azaacene heterodimers by time-resolved spectroscopy and quantum chemical calculations. Combining two different azaacenes through a nonconjugated linker using condensation chemistry furnishes azaacene heterodimers... |
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... |
Mar 20, 2024 - Institute of Organic Chemistry - AK Mastalerz
Yang, Xuan; Brückner, Margit; Rominger, Frank; Kirschbaum, Tobias; Mastalerz, Michael, 2024, "Dispersion-Driven Formation of Chiral Twisted PAH Double Helices [Data]", https://doi.org/10.11588/data/BRM2DI, heiDATA, V1
Molecular double helices are ubiquitous in nature and have also been generated artificially. These are usually based on helical ribbons. Here, a new type of double helices based on twisted ribbons is introduced. The monomeric strands are polycyclic aromatic hydrocarbons of variou... |
Feb 4, 2022 - Institute of Organic Chemistry - AK Mastalerz
Reinhard, Dennis; Rominger, Frank; Mastalerz, Michael, 2022, "Desymmetrization Strategy to Achieve Triptycene-Based 3,6-Dimethoxytriphenylenes via Oxidative Cyclodehydrogenation [Data]", https://doi.org/10.11588/data/OH6757, heiDATA, V1
To achieve a highly symmetric triptycene based hexamethoxytriphenylene in high yield of 97 %, a less symmetric triptycene (C3v) is necessary as precursor for cyclodehydrogenative Scholl-type oxidation, by taking into account the regioselectivity of the C-C bond formation controll... |
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
Research Data associated with the related publication. |
Jan 19, 2022 - Institute of Organic Chemistry - AK Mastalerz
Yang, Xuan; Rominger, Frank; Mastalerz, Michael, 2022, "Contorted Heteroannulated Tetraareno[a,d,j,m]coronenes [Data]", https://doi.org/10.11588/data/RYUGT2, heiDATA, V1
Cata-condensed heteroannulated tetraarenocoronenes with C2h symmetry have been obtained from three doubly brominated diarenoperylenes. X-ray diffraction showed that the coronenes mostly adopt S-shaped contorted π-planes. The large variety of fused rings in the coronenes′ core all... |
Jan 20, 2022 - Institute of Organic Chemistry - AK Mastalerz
Yang, Xuan; Rominger, Frank; Mastalerz, Michael, 2022, "Benzo-Fused Perylene Oligomers with up to 13 Linearly Annulated Rings [Data]", https://doi.org/10.11588/data/2TX0VD, heiDATA, V1
The longer acenes with more than six linearly fused six-membered rings are still fascinating chemists and physicists because of their unique photophysical properties and their high potential for organic electronics applications. Unfortunately, with increasing size (seven and more... |
Jan 19, 2022 - Institute of Organic Chemistry - AK Mastalerz
Wang, Xubin; Kohl, Bernd; Rominger, Frank; Elbert, Sven Michael; Mastalerz, Michael, 2022, "A Triptycene-Based Enantiopure Bis(Diazadibenzoanthracene) by a Chirality-Assisted Synthesis Approach [Data]", https://doi.org/10.11588/data/46LINE, heiDATA, V1
By applying a chirality-assisted synthesis (CAS)approach enantiopure diaminodibromotriptycenes were converted to rigid chiral helical diazadibenzoanthracenes, which show besides pronounced Cotton effects in circular dichroism spectra higher photoluminescence quantum yields as com... |
