Polycyclic aromatic hydrocarbons (PAHs) are persistent contaminants in the environment. Several of them have carcinogenic properties. There is considerable interest in their sensitive low-cost detection and monitoring.
View Article and Find Full Text PDFWe report the electron-beam induced crosslinking of cinnamate-substituted polythiophene proceeding excited state [2+2]-cycloaddition. Network formation in thin films is evidenced by infrared spectroscopy and film retention experiments. For the polymer studied herin, the electron-stimulated process appears to be superior to photo (UV)-induced crosslinking as it leads to less degradation.
View Article and Find Full Text PDFThree stable N,N'-diarylated dihydroazaacene radical cations 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 radical cations are surprisingly stable-their absorption spectra in dichloromethane remain unchanged in ambient conditions for at least 24 hours.
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