TURKISH JOURNAL OF CHEMISTRY, vol.43, no.4, pp.1086-1097, 2019 (SCI-Expanded)
Coumarin-based chromogenic and fluorogenic dye 4 was designed and synthesized. The photophysical properties of 4 were determined in solvents with different polarities. Protonation affinity was determined by adding trifluoroacetic acid (TFA) to a dichloromethane solution of dye 4 utilizing the UV-Vis and fluorescence titration methods. The protonation region was investigated by using the H-1 NMR method. Additionally, DFT and TDDFT studies were performed to support the structural and absorption spectral properties of 4.