Photophysics of some indolizines, derivatives from bipyridyl, in various media

Synthesis and characterization of a substituted indolizine and investigation of its photoluminescence quenching via electron deficient nitroaromatics

“…(See ESI Figure S12) Fluorescence quantum yield of 1 was calculated as 0.035 using corrected fluorescence spectra (anthracene dissolved in ethanol as a standard (Φ st f = 0.27 at 25 o C)). 10 Sensing ability of 1 was (Figure 1). Photoluminescence quenching by nitroaromatics, which follows the optical excitation that produces an electron-hole pair, is usually attributable to electron-transfer quenching occurring from the excited molecule to the LUMO of the electron-deficient nitroaromatic molecule.…”

Effect of substituents on the absorption properties of three pyridylindolizine derivatives: A DFT and TDDFT study

“…In addition, the relative orientation of the pyridyl ring with respect to the indolizine plane was taken into account by choosing conformers with a perpendicular (II-c1) and in-plane (II-c2, II-c3, and II-c4) orientations. Compound III differs from compound II so that the pyridyl ring is attached to carbon C(5) instead of C (7). As in the case of compound I, the orientation of the pyridyl ring with respect to the indolizine plane was also considered by choosing conformers having in-plane (III-c1 and III-c2, and III-c4) and perpendicular (III-c3) orientations.…”

“…Moreover, spectral properties of indolizines can be modified by changing the nature and positions of the substituents and the solvent characteristics. Although several applications rely on the optical properties of indolizines, only in a few studies the relationship between the optical properties and the nature and positions of the substituents have been investigated [5][6][7][8].…”

Synthesis of Cyano-pyrrolo[1,2-a][1,10]phenanthroline Derivatives Using a Multicomponent Condensation

“…Extensive researches revolving around the biological, medicinal, photographic, and other useful applications of substituted indolizines have been made, resulting in frequent reviews of the chemistry, synthesis, and properties of this system and its analogs . The increasing demand for mild, new, and efficient synthetic methods for indolizine heterocycles is due to their importance in the fields of biology and pharmacology .…”