Akademik Veri Yönetim Sistemi
Journal of Molecular Structure, cilt.1365, 2026 (SCI-Expanded, Scopus)
Six of the novel Coumarin-Acridine bipolar fluorophores that have some electron-releasing substituents on the phenyl ring of the coumarin unit (CA2, CA3, CA4, and CA5) and two unsubstituted (CA1 and CA6) were prepared and their photophysical properties were investigated. The emission spectrum of all bipolar fluorophores in buffer solution exhibited dual-peak profile at 411 nm and 436 nm and have a large Stokes shift. These properties attributed to the equilibrium between locally excited and intramolecular charge transfer states. The unsubstituted bipolar fluorophores have a slightly lower Stokes shift (158 nm) while exhibiting higher QYs (0.29 for CA1 and 0.45 for CA6). Although the substituted bipolar fluorophores have a larger Stokes shift (182 nm), and lower QYs. Furthermore, chromaticity analyses revealed that all bipolar fluorophores have similar CIE 1931 coordinates, are (x = 0.156 and y = 0.037-0,056) and, their exceptional color purity of ∼ 90%, calculated with respect to the standard E illuminant, confirms that the compounds emit in the deep-blue region. In solid phase, CA1 and CA6 fluorophores have moderate QYs (22% and 31%, respectively) and the CIE coordinate of CA1 is close to yellow, while that of CA6 is in the deep blue region.