Spectral characteristics and luminescence under the photo- electro-excitation of substituted dibenzthiophene sulfone phenanthridine were studied in this paper. Diphenylamines are substituents introduced 2nd 7th positions (linear configuration) or 3rd 6th (angular phenanthridine. All molecules show delayed fluorescence, both solutions films produced by thermal vacuum deposition. The value energy...

The pyrrolo[3,2,1-de]phenanthridine skeleton has been found in a large number of natural products from the plants of almost all of the genera of the family Amaryllidaceae. Examples of these compounds include assoanine1 (1), oxoassoanine2 (2), hippadine3 (3) and ungeremine4 (4) amongst others5. These compounds (Figure 1) are of interest as synthetic targets not only for the development of synthe...

PURPOSE This study describes the antibacterial effect of extracts and compounds isolated from the aerial part of Chelidonium majus Linn. (Papaveraceae) acting against clinical strains of methicillin-resistant Staphylococcus aureus (MRSA). METHODS The activities were evaluated by using the macrobroth dilution method and reported as the MICs/MBCs. RESULTS Bioassay-guided fractionation of the ...

A family of terbium probes was synthesized and evaluated for the luminescence detection of copper and zinc in water at neutral pH. Each probe incorporates a terbium ion chelated by a macrocyclic polyaminocarboxylate and conjugated to either one, two, or three phenanthridine antennas via a diamine linker. All three probes, Tb-1Phen, Tb-2Phen, and Tb-3Phen, exhibit similar responses toward copper...

A total synthesis of the antimalarial indolo[3,2-j]phenanthridine alkaloid calothrixin B is reported. The key intermediate, ketoester 11, was assembled using sequential Sonogashira coupling and intra/intermolecular fashioned copper-catalyzed oxidative cyclization reactions.

The influence of a nitrogen atom in the backbone PAH was revealed by hydrated clusters phenanthrene and phenanthridine rotational spectroscopy study. Background image credit: NASA, ESA, Hubble Heritage Team (STScI/AURA) – ESA/Hubble Collaboration.

Where HAS you been? A manganese-mediated annulation of 2-isocyanobiaryls with organoboronic acids is developed for the synthesis of a broad range of phenanthridine derivatives. Mechanistic studies indicate that the reaction proceeds by the intramolecular homolytic aromatic substitution (HAS) of an imidoyl radical intermediate.