作者:Gaozhan Xie、Miriam Hauschild、Hendrik Hoffmann、Lukas Ahrens、Frank Rominger、Michal Borkowski、Tomasz Marszalek、Jan Freudenberg、Milan Kivala、Uwe H. F. Bunz
DOI:10.1002/chem.201904516
日期:2020.1.16
The synthesis, property evaluation, and single crystal X-ray structures of four 5,7,12,14-tetrafunctionalized diazapentacenes are presented. The synthesis of these compounds either starts from tetrabromo-N,N-dihydrodiazapentacene or from a diazapentacene tetraketone. Pd-catalyzed coupling or addition of a lithium acetylide gave the precursors that furnish, after further redox reactions, the diazapentacenes
介绍了四种 5,7,12,14-四官能化二氮杂五苯的合成、性能评价和单晶 X 射线结构。这些化合物的合成要么从四溴-N,N-二氢二氮杂五苯开始,要么从二氮杂五苯四酮开始。钯催化的偶联或乙炔锂的加成得到前体,在进一步的氧化还原反应后,二氮杂五苯成为稳定的结晶材料。在有机场效应晶体管中评估了四苯基取代化合物作为n沟道半导体的性能。
Synthesis, Assembly, and Thin Film Transistors of Dihydrodiazapentacene: An Isostructural Motif for Pentacene
作者:Qian Miao、Thuc-Quyen Nguyen、Takao Someya、Graciela B. Blanchet、Colin Nuckolls
DOI:10.1021/ja036466+
日期:2003.8.1
films show that the molecules stack in layers with their long axis upright from the surface. Some of the derivatives synthesized for this study have unexpectedly high solubility in polar solvents such as DMF and DMSO. The crystal structure from DMF reveals self-assembled channels with each of the aniline functionalities forming a hydrogen bond with solvent. In more nonpolar solvents, the solid-state assembly
下面的研究详细介绍了二氢二氮杂并五苯的合成、组装和薄膜晶体管。这些分子具有与并五苯相同的分子形状,但更容易制备并且具有更高的环境稳定性。由二氢二氮杂并五苯制成的薄膜表现为场效应晶体管,其迁移率和开/关比足够高,可用于某些应用。在这些薄膜上的 X 射线衍射和 AFM 实验表明,分子堆叠成层,其长轴垂直于表面。本研究合成的一些衍生物在极性溶剂(如 DMF 和 DMSO)中具有出乎意料的高溶解度。DMF 的晶体结构揭示了自组装通道,每个苯胺官能团与溶剂形成氢键。在更多的非极性溶剂中,
Chemiluminescence of dimethyldioxetanone. Unimolecular generation of excited singlet and triplet acetone. Chemically initiated electron-exchange luminescence, the primary light generating reaction
作者:Steven P. Schmidt、Gary B. Schuster
DOI:10.1021/ja00521a049
日期:1980.1
Abstract : Dimethyldioxetanone (2a) undergoes two distinct thermal reactions which generate electronically excited states. The unimoleculardecomposition of 2a at 30.0 C produces excited singlet and triplet acetone, with efficiencies of 0.1 and 1.5% respectively. The composite activation energy for formation of singlet acetone is 3-4 kcal/mol greater than the activation energy for the thermal disappearance
angles in the fjord regions than typical [5]helicenes, and optical/electrochemical measurements revealed a significant increase in the electronic communication between the two heteropentacene moieties of the double helicenes compared with their cruciform dimers. The optical resolution of one of the double helicenes was successfully carried out, and their stability towards racemization was remarkably higher
作者:Gaozhan Xie、N. Maximilian Bojanowski、Victor Brosius、Thomas Wiesner、Frank Rominger、Jan Freudenberg、Uwe H. F. Bunz
DOI:10.1002/chem.202004548
日期:2021.1.26
Three stable N,N’‐diarylated dihydroazaacene radicalcations were prepared by oxidation of neutral N,N’‐diarylated dihydroazaacenes synthesized via palladium‐catalyzed Buchwald‐Hartwig aminations of aryl iodides with N,N’‐dihydroazaacenes. Both neutral as well as oxidized species were investigated via UV‐vis spectroscopy, single crystal analysis, and DFT calculations. All the radicalcations are surprisingly