Nickel(II) complexes containing thiosemicarbazone and triphenylphosphine: Synthesis, spectroscopy, crystallography and catalytic activity
摘要:
Four new Ni(II) complexes of the general formula [Ni(PPh3)(L)](L = dibasic tridentate ligand derived from 4-diethylamino-salicylaldehyde and thiosemicarbazide or 4-N-substituted thiosemicarbazide) have been reported. The new complexes have been synthesized and characterized by analytical and spectroscopic (IR, electronic, H-1 NMR and P-31 NMR) techniques. Molecular structure of one of the complexes has been determined by X-ray crystallography. The complex. [Ni(PPh3)(L4)] (H(2)L4 = thiosemicarbazone prepared from 4-diethylamino-salicylaldehyde and 4-phenylthiosemicarbazide) crystallized in monoclinic space group with two molecules per unit cell and has the dimensions of a = 13.232(6) angstrom, b= 10.181(5) angstrom, c = 13.574(7) angstrom, alpha = 90 degrees, beta = 98.483(2)degrees and gamma =90 degrees. Catalytic activity of the complexes has been explored for aryl-aryl coupling reaction. (C) 2011 Elsevier B.V. All rights reserved.
Caenorhabditis elegans as a model for exploring the efficacy of synthesized organoruthenium complexes for aging and Alzheimer's disease a neurodegenerative disorder: A systematic approach
article deals with the preparation and characterisation of new organoruthenium(II) complexes, namely [RuCp(Dea-Sal-tsc)(PPh3)] (1), [RuCp(Dea-Sal-mtsc)(PPh3)] (2), [RuCp(Dea-Sal-etsc)(PPh3)] (3) and [RuCp(Dea-Sal-ptsc)(PPh3)] (4). The new ruthenium(II) complexes were characterized by various analytical, spectral techniques. The structure of the ligand [H2-Dea-Sal-tsc] and the complex [RuCp(Dea-Sal-tsc)(PPh3)]
Effect directed synthesis of a new tyrosinase inhibitor with anti-browning activity
作者:Ignacio Cabezudo、I. Ayelen Ramallo、Victoria L. Alonso、Ricardo L.E. Furlan
DOI:10.1016/j.foodchem.2020.128232
日期:2021.3
TLC bioautography, (c) inhibitor identification via mass spectrometry coupled to bioautography. During these proof-of-concept experiments, the approach led to the straightforward identification of a new thiosemicarbazone with improved tyrosinase inhibition properties and fresh-cut apple slices antibrowning effect when compared to kojic acid. In conclusion, the platform represents an interesting strategy
Binuclear Ni(II) complexes containing ONS donor Schiff base ligands: Preparation, spectral characterization, X-ray crystallography and biological exploration
作者:G. Kalaiarasi、S. Dharani、S. Rex Jeya Rajkumar、Vincent M. Lynch、R. Prabhakaran
DOI:10.1016/j.jinorgbio.2020.111176
日期:2020.10
molecular structure of complexes [Ni2(H-DEAsal-tsc)2(μ-dppm)]·2Cl (1) and [Ni2(DEAsal-ptsc)2(μ-dppm)] (4) have been confirmed by single crystal X-ray diffraction studies. The analysis indicated that in complex 1, the ligand [H2-DEAsal-tsc] coordinated as monobasic tridentate donor through phenolic oxygen, azomethine nitrogen and thione sulfuratoms. However, in complex 4, the ligand [H2-DEAsal-ptsc] behaved
absorption and emission titration methods. Based on the observations, an intercalative binding mode of DNA has been proposed. The proteinbinding abilities of the new complexes along with their precursor were monitored by quenching of tryptophan and tyrosine residues using BSA as modelprotein. From the studies, it was found that the new palladium metallacycles exhibited better affinity than their
Semicarbazone and thiosemicarbazone appended 4-diethylamino-2‑hydroxybenzyl compounds as highly selective bifunctional chemosensors: An experimental and computational approach
and F− anion in a mixture of solvent, CH3CN:CH3OH (8:2, v/v). The receptor S3 possesses high sensitivity and selectivity in comparison with the receptors S1 and S2. The binding constant and limit of detection of the receptors with sensed cations and anion showed high sensitivity and selectivity towards Co2+ cation with order of magnitude 6, greater than the other sensed cations. In addition, the receptors