《Structures and photophysical properties of two luminescent bipyridine compounds: 2′,6′-difluoro-6-[3-(pyridin-2-yloxy)phenyl]-2,3′-bipyridine and 2′,6′-dimethoxy-6-[3-(pyridin-2-yloxy)phenyl]-2,3′-bipyridine》 was published in Acta Crystallographica, Section C: Structural Chemistry in 2020. These research results belong to Park, Ki-Min; Yang, Kiyull; Moon, Suk-Hee; Kang, Youngjin. Related Products of 626-05-1 The article mentions the following:
The title compounds, C21H13F2N3O (1) and C23H19N3O3 (2), have been synthesized by typical cross-coupling reactions. Both compounds have been characterized by single-crystal X-ray diffraction. Bipyridine 1 exhibits a fully extended structure in which the terminal pyridine rings are oriented away from each other, while bipyridine 2 displays a bent structure in which terminal pyridine rings are oriented in the same direction. Several intermol. interactions lead to the formation of two- and three-dimensional supramol. networks in the crystal structures of 1 and 2, resp. Compound 1 bears fluorine substituents and emits a strong fluorescence with λmax = 325 nm, while methoxy-substituted compound 2 displays red-shifted emissions with λmax = 366 nm. The emissions observed in both compounds originate from phenyl- and 2,3′-bipyridine-based π-π* transitions, according to theor. calculations Both compounds have high triplet energies (T1) ranging from 2.64 to 2.65 eV, which makes them potential host materials in organic light-emitting diodes (OLEDs). In the experimental materials used by the author, we found 2,6-Dibromopyridine(cas: 626-05-1Related Products of 626-05-1)
2,6-Dibromopyridine(cas: 626-05-1) belongs to pyridine. Pyridine is very deactivated towards electrophilic substitution with respect to benzene. For this reason classical formylation, using methods such as the Gattermann or Vilsmeier reactions, are not generally successful. Related Products of 626-05-1