Synthesis, photophysical properties, chemo-sensing ability and computational studies of biscoumarin derivatives

Synthesis, Characterization, Photophysical, Lifetime and NLO Studies of Chromenes

“…Based on the magnitude of the first hyperpolarizability, the selected compounds may be potential applicants in the development of NLO materials. The magnitude of total static dipole moment (μ) equation [1], mean polarizability total α tot equation [2], anisotropy of the polarizability Δα equation [3] and mean first hyperpolarizability β tot equation [4], can be calculated by using the following equations:…”

“…[2] In the past, we have been successful in developing some chemosensor molecules that are widely used in metal ion detection. [3,4] So far, different fluorescent chemosensors have been accounted for to distinguish the micromolar-level detection of Cu 2 + and Fe 3 + in an analyte with high responsiveness. However, the development of a new chemosensor to possibly detect both Cu 2 + and Fe 3 + ions is still challenging.…”

“…Fluorescence sensor molecules are widely used in metal ion detection because of their facile synthesis, high sensitivity and selectivity, fast response, and high interference resistance [2] . In the past, we have been successful in developing some chemosensor molecules that are widely used in metal ion detection [3,4] …”

Nature of Linear Spectral Properties and Fast Relaxations in the Excited States and Two-Photon Absorption Efficiency of 3-Thiazolyl and 3-Phenyltiazolyl Coumarin Derivatives

“… 19 , 20 Coumarin derivatives exhibit a large variety of linear steady-state and time-resolved photophysical properties, 21 − 33 which depend on the specific substituents in different positions of the molecular architecture 18 , 24 , 25 , 27 , 34 , 35 and solute–solvent interactions. 2 , 21 , 22 , 26 , 36 , 37 These characteristics afford the ability to tune emission efficiency, 21 , 38 the values of Stokes shifts, 34 binding abilities, 23 , 39 and photochemical stability 40 along with harnessing the fast relaxation processes in the ground and excited electronic states of coumarins for a number of applications. 28 − 33 It should be mentioned that notable efforts were made for improving and making practical use of the two-photon absorption (2PA) properties of coumarin derivatives in the microfabrication, 41 biomedicine, 42 fluorescence microscopy, 43 and PDT 19 research fields.…”

“…The development and investigation of different types of coumarin derivatives remain subjects of continuing interest for a number of important research areas, including organic electronics, , nonlinear optics, and lasing, − 3D microfabrication and optical data storage, − sensing technologies, − biomedical probes and reactants, − and one- and two-photon photodynamic therapy (PDT). , Coumarin derivatives exhibit a large variety of linear steady-state and time-resolved photophysical properties, − which depend on the specific substituents in different positions of the molecular architecture ,,,,, and solute–solvent interactions. ,,,,, These characteristics afford the ability to tune emission efficiency, , the values of Stokes shifts, binding abilities, , and photochemical stability along with harnessing the fast relaxation processes in the ground and excited electronic states of coumarins for a number of applications. − It should be mentioned that notable efforts were made for improving and making practical use of the two-photon absorption (2PA) properties of coumarin derivatives in the microfabrication, biomedicine, fluorescence microscopy, and PDT research fields.…”