New-synthesized pyrazoloquinoline as promising luminescent materials

Gondek, E.; Kityk, I.V.; Sanetra, J.; Szlachcic, Paweł; Armatys, P.; Wisla, A.; Danel, A.

doi:10.1016/j.optlastec.2004.12.011

Cited by 27 publications

(8 citation statements)

References 10 publications

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“…Compound (I) shows fluorescence both in solution and in the solid state, which suggests that electroluminescence should also be observed for this material (Thomas et al, 2004;Yeh et al, 2004;Garbuzow et al, 1996). A trifluoromethyl group at C7 is expected to have a significant influence on the absorption and emission properties of the molecule, causing bathochromic shifts of emission bands (Koścień et al, 2009a,b) compared with 1H-pyrazolo[3,4-b]quinoline derivatives without trifluoromethyl substituents (Gondek et al, 2006).…”

Section: Commentmentioning

confidence: 96%

1,3,4-Triphenyl-7-trifluoromethyl-1H-pyrazolo[3,4-b]quinoline at 293 and 100 K

2010

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In the structure of the title compound, C(29)H(18)F(3)N(3), belonging to the space group P6(5) (or P6(1)), three symmetry-independent molecules are arranged in two chains, with two molecules alternating along the 3(2) axes, whereas the remaining molecule forms a chain along [0001] due to the 6(5) screw axis. The conformation of each of the molecules is stabilized by an intramolecular C-H...N hydrogen bond, with C...N distances in the range 2.964 (6)-3.069 (5) A at room temperature (293 K) and 2.943 (4)-3.084 (4) A at low temperature (100 K). One molecule has its -CF(3) group ordered even at 293 K, which can be explained only by considering its involvement in two weak intermolecular C-H...F interactions, with C...F distances in the range 3.084 (6)-3.302 (5) A at 293 K and 3.070 (3)-3.196 (3) A at 100 K, and also a C-F...N interaction, with a C...N distance of 3.823 (5) A at 293 K and 3.722 (4) A at 100 K. The trifluoromethyl groups in the two remaining molecules are disordered at 293 K, whereas at 100 K the continuous (dynamic) positional disorder of one of the -CF(3) groups (of the molecule forming the chain along [0001]) is totally eliminated while the -CF(3) group disorder remains for the third molecule.

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Section: Commentmentioning

confidence: 96%

1,3,4-Triphenyl-7-trifluoromethyl-1H-pyrazolo[3,4-b]quinoline at 293 and 100 K

2010

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“…The synthesis of pyrazolo [3,4-b]pyridines has received significant attention in recent years because of their wide range of biological and pharmaceutical properties such as antibacterial, 1 antimicrobial, 2 antiviral, 3 oncogenic Ras inhibiting 4 and cyclooxygenase inhibiting 5 activities. Furthermore, these compounds can be used as promising luminescent materials 6 and a fluorescent sensor. 7 Thus, the synthesis of pyrazolo [3,4-b]pyridines currently is of much importance.…”

Section: Introductionmentioning

confidence: 99%

Synthesis of 4‐Aryl‐3‐Methyl‐1‐Phenyl‐1H‐Benzo[h]Pyrazolo[3,4‐b]Quinoline‐5,10‐diones Using Diammonium Hydrogen Phosphate as an Efficient and Versatile Catalyst in Water

Wu¹,

RuoYi²,

Yang³

et al. 2010

J Chinese Chemical Soc

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“…Using quantum chemical calculations we will explore influence of the different substitution by the methoxy groups on the mentioned parameters and we will analyze this aspect with respect to the energy shift of HOMO levels of the chromophores under applied electric field for the case of the isolated It is necessary to emphasize that earlier results presented in Ref. [6] have shown a great potential for the use of the PQ derivative chromophore as emitting dyes possessing large quantum efficiency covering both visible as well as near ultraviolet spectral range. Section 2 presents the principal absorption spectra of the investigated PQ dye chromophore in PVK matrices.…”

Section: Introductionmentioning

confidence: 99%