Theoretical and experimental spectroscopic investigation of new polymethine donor-π-acceptor cyanine dyes: Synthesis, photophysical, and TDDFT studies
作者:Ahmed I. Koraiem、Ahmed El-Shafei、Islam M. Abdellah、Fathy F. Abdel-Latif、Reda M. Abd El-Aal
DOI:10.1016/j.molstruc.2018.07.021
日期:2018.12
Abstract Newseries of polymethine cyaninedyes with different length of π-chain have been synthesized and characterized. These newdyes are based on D-π-A architecture with long π-electron systems. The UV–vis/emission spectral studies showed that the dyes are absorbed in the region of λmax (485–570) nm and emitted at (540–600) nm. This makes these dyes favorable for the detection of biological and
Cu(II) and Co(II) Complexes with (4Z)-4-[(2-Diethylaminoethylamino)methylene]-5-Methyl-2-Phenylpyrazol-3-one: Synthesis, Magnetic Properties, and Crystal Structures
作者:A. S. Burlov、V. G. Vlasenko、T. V. Lifintseva、M. S. Milutka、Yu. V. Koshchienko、A. I. Uraev、D. A. Garnovskii、Yu. V. Rusalev、V. A. Lazarenko、V. N. Khrustalev
DOI:10.1134/s1070328420070015
日期:2020.7
CH3OH · H2O (II) are synthesized. The structures and compositions of the synthesized compounds are determined by elemental analysis, 1Н NMR and IR spectroscopy, and X-ray diffraction analysis (CIF files CCDC nos. 1971770 (I) and 1971772 (II)). Bis(chelate) pentacoordinated complex I has a distorted tetragonal pyramidal structure, and a distorted octahedral structure with the monodentate acetate anion
Synthesis, Characterization and in vitro Antitumor Activity of Novel Schiff Bases Containing Pyrazole Group
作者:Tiegang Ren、Jie Wang、Guihui Li、Yongzhe Li
DOI:10.14233/ajchem.2014.16893
日期:——
A series of novel Schiff base compounds containing pyrazole group were synthesized with pyrazole aldehyde and benzene hydrazine or pyrazole aldehyde and phenylhydrazine hydrochloride as the starting materials. As-synthesized Schiff base compounds were characterized by means of nuclear magnetic resonance spectroscopy, infrared spectrometry, mass spectrometry and elemental analysis. Moreover the in vitro antitumor activity of compounds B2 and B4 against K562 (human leukemia cell line) was evaluated using MTT assay method. Results show that the compounds can inhibit K562 tumor cells growth and generation.
SYNTHESIS AND CRYSTAL STRUCTURE OF THE Ni(II) COMPLEX WITH (4Z)-4-[(2-DIETHYLAMINOETHYLAMINO)METHYLENE]- 5-METHYL-2-PHENYLPYRAZOLE-3-ONE
作者:A. S. Burlov、V. G. Vlasenko、Yu. V. Koshchienko、A. I. Uraev、E. V. Korshunova、M. S. Milutka、D. A. Garnovskii、I. V. Linko、V. N. Khrustalev
DOI:10.1134/s0022476620100121
日期:2020.10
The Ni(II) complex based on (4Z)-4-[(2-diethylaminoethylamino)methylene]-5-methyl-2-phenylpyrazole-3-one (HL), being the condensation product of 5-hydroxy-3-methyl-1-phenylpyrazole-4-carbaldehyde with N,N-diethylethylenediamine, is synthesized. By the elemental analysis and IR spectroscopy it is found that the nickel complex has the composition Ni(L)CH3COO·CH3OH·H2O. The crystal and molecular structures
An unusual thionyl chloride-promoted C−C bond formation to obtain 4,4'-bipyrazolones
作者:Gernot A Eller、Gytė Vilkauskaitė、Algirdas Šačkus、Vytas Martynaitis、Ashenafi Damtew Mamuye、Vittorio Pace、Wolfgang Holzer
DOI:10.3762/bjoc.14.110
日期:——
transformed into the corresponding 4,4'-bipyrazoles via alkaline hydrolysis and subsequent decarboxylation. Detailed NMR spectroscopic investigations (1H, 13C, 15N) were undertaken with all products prepared. Moreover, the structure of a representative 5,5'-dioxo-4,4'-bipyrazole-4,4'-dicarboxylate was confirmed by X-raycrystalstructure analysis.