Reactions of halogenated pyromellitic diimides. Journal of the American Chemical Society 2018, 140 (Semi)ladder-Type Bithiophene Imide-Based All-Acceptor Semiconductors: Synthesis, Structure–Property Correlations, and Unipolar n-Type Transistor Performance. Yingfeng Wang, Han Guo, Alexandra Harbuzaru, Mohammad Afsar Uddin, Iratxe Arrechea-Marcos, Shaohua Ling, Jianwei Yu, Yumin Tang, Huiliang Sun, Juan Teodomiro López Navarrete, Rocio Ponce Ortiz, Han Young Woo, Xugang Guo.The Journal of Physical Chemistry A 2018, 122 Effect of Electron–Nuclear Hyperfine Interactions on Multiple-Quantum Coherences in Photogenerated Covalent Radical (Qubit) Pairs. Nelson, Jinyuan Zhang, Jiawang Zhou, Brandon K. Neutral, π-Radical-Conjugated Microporous Polymer Films of Nanoscale Thickness for Potential Use in Magnetoelectronics and Sensor Devices. Venkata Suresh Mothika, Martin Baumgarten, Ullrich Scherf.The Journal of Organic Chemistry 2022, Article ASAP. Improved Syntheses of Halogenated Benzene-1,2,3,4-Tetracarboxylic Diimides. This article is cited by 13 publications. Taken together, these findings demonstrate that directly linking the benzene rings of PIs with a single C–C bond is a viable method for generating stabilized high-spin organic anionic polyradicals. – yield EPR signals (in frozen solutions) that can be assigned to spin–spin interactions in X 2 -Hex 2(.– reveal that the unpaired electron is largely localized on a single PI unit.The ENDOR spectra of the radical monoanions X n -Hex −), respectively, were probed extensively by UV–vis–NIR absorption, EPR, and electron nuclear double resonance (ENDOR) spectroscopies.Finally, the chemically generated radical anion and polyanion states, X n -Hex Electrochemical experiments, carried out on the oligomers X n -Hex, reveal that the reductions of the PI units occur at multiple distinct potentials, highlighting the weak electronic coupling between the adjacent redox centers. X-ray crystallography shows that X 2 -Ph crystallizes into a densely packed superstructure, despite the criss-crossed conformations adopted by the molecules. 1H and 13C nuclear magnetic resonance (NMR) spectroscopies confirmed the isolation of the dimeric, trimeric, and tetrameric homologues. We hypothesize that these oligomers might form high-spin states in their reduced forms because of the nearly orthogonal conformations adopted by their PI units. #Polyroots calculator seriesHerein we report the synthesis, isolation, and characterization of a series of X-shaped pyromellitimide (PI) oligomers ( X n -R, n = 2–4, R = Hex or Ph) linked together by single C–C bonds between their benzenoid cores. The synthesis of stable organic polyradicals is important for the development of magnetic materials.
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