Evaluation of new organic pigments as laser-active media for a solid-state dye laser

Condensation pigments for pigment printing of cotton - synthesis, photophysical properties, TD-DFT studies

“…The ground state (S0) geometry of the synthesized dyes in their C1 symmetry was optimized in the gas phase using DFT [12]. The functional used was B3LYP.…”

Synthesis of highly fluorescent diketopyrrolopyrrole derivative and two-step response of fluorescence to acid

“…The introduction of morpholine substituents causes bathochromic shifts of the absorption and fluorescence spectra with respect to the parent compound 1. As with other soluble DPP delivatives, [2][3][4] 2 has strong absorbance (ε = 42300) in the visible region (λ max = 522 nm). The fluorescence spectrum exhibits a maximum fluorescence band at 578 nm with a shoulder at approximately 616 nm upon excitation at a wavelength of 522 nm.…”

“…The alkylation of nitrogen atoms in lactam moieties prohibits the formation of hydrogen bonds and provides high solubility as well as strong luminescence. Because of the high potential of soluble DPP, new functional materials for light-emitting diodes, 2 dye lasers, 3 and organic solar cells 4 have been developed in recent years. Since the opitical properties of DPP strongly depend on the electron density of the substitutent on their aromatic ring, DPP with a variety of substitutents have been synthesized by the reaction of succinate ester and benzonitrile derivatives.…”

Photo-physical properties and amplified spontaneous emission of a new derivative of fluorescein

“…In recent years, the synthesis of new high-performance dyes and the implementation of new ways of incorporating the organic molecules into the solid matrix have resulted in significant advances towards the development of practical tunable solid-state dye lasers [7][8][9][10][11][12][13][14][15][16][17][18][19]. Most of the recent work in solid-state dye lasers has been done using either polymers, silica gels and glass-polymer composites [17] as host materials for lasing dyes.…”