Optical absorption measurements and quantum-chemical simulations on 1H-pyrazolo[3,4-b]quinoline derivatives

Thermoluminescence of the blue light-emitting system based on poly(9-vinylcarbazole) doped with a pyrazoloquinoline dye

“…In consequence both electrons and holes are captured by dye molecules and excitons are formed, which radiatively decay giving deep blue emission. In all the samples containing PAQ8 the emission from the dye is dominating despite of the fact that in these TL experiments we have intentionally chosen the excitation light wavelength (l excit ¼ 337 nm) which is better absorbed by the matrix [19,20] than by the PAQ8 dye [1,21,22]. One can conclude that in the PVK/PBD/PAQ8 system, either the energy transfer from the PVK/PBD matrix to the dye is very efficient, what was suggested also for other types of pyrazoloqinoline derivatives incorporated in PVK matrix [23], or both electrons and holes diffuse among PBD and PVK and encounter each other at the dye molecule.…”

Comparison of second-order nonlinear optical chromophores with D–π–A, D–A–π–A and D–D–π–A architectures: diverse NLO effects and interesting optical behavior

“…In recent years, organic electro-optic (OEO) materials have attracted much attention and been extensively studied owing to their potential applications in optical switches, optical sensors, information processors, and telecommunications etc. [1][2][3][4] The second-order nonlinear optical (NLO) chromophores are the key constructing blocks for OEO materials. 5 To meet the stringent requirements for the using of devices, NLO chromophores should exhibit good properties such as high thermal and chemical stabilities, large nonlinearity, and good transparency, as well as easy syntheses.…”

“…H NMR (400 MHz, CDCl 3 ) d 9.73 (s, 1H, CHO), 8.21 (d, J ¼ 9.2 Hz, 1H, ArH), 7.95 (s, 1H, CH), 7.57 (d, J ¼ 4.0 Hz, 1H, CH), 7.18 (d, J ¼ 4.0 Hz, 1H, CH), 6.26 (dd, J ¼ 9.2, 2.4 Hz, 1H, ArH), 5.97 (d, J ¼ 2 4. Hz, 1H, ArH), 3.92 (t, J ¼ 6.5 Hz, 2H, CH 2 ), 3.34 (q, J ¼ 7.…”

Facile Synthesis and Photophysical Characterization of New Quinoline Dyes

“…The diphenylaminoquinolines have shown to be a promising luminescent organic material with emission in blue range [29,30]. Other derivatives are presented as potential candidates for applications in fiber optics, photonics and light emitting diodes [31][32][33][34]. The literature shows that quinoline backbone is found in several natural products [35].…”