Blue fluorescence from pyridinyl coumarincarboxymides structure having high quantum yield in solution

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.…”

Synthesis and a TD-DFT study of a series of novel 3-imidazolyl-substituted coumarin molecules with large Stokes shifts

“…[10][11][12][13] Coumarin dyes are widely studied fluorescent dyes with excellent optical properties, such as high fluorescence quantum yields, large Stokes shifts and good photostability. [14][15][16] In addition, the coumarin parent structure is easy to modify and the corresponding synthesis is convenient, endowing it with research and application value in the fields of fluorescent dyes, biological imaging and fluorescent probes. 17,18 In general, the structure of 3-substituted coumarin is similar to that of transstilbene, with good molecular rigidity and p-conjugated electron delocalization, which further enhance its optical performance.…”