16049-03-9Relevant articles and documents
Synthesis, structural, spectral characterization, DFT analysis and antimicrobial studies of aquabis(L-ornithine)copper(II) picrate
Kumar, Rakesh,Obrai, Sangeeta,Sharma, Aparna,Kaur Jassal, Amanpreet,Hundal, Maninder Singh,Mitra, Joyee
, p. 43 - 48 (2014)
The present work consists of synthesis, spectroscopic, DFT studies and crystal structure investigation of complex [Cu(L-orn)2(H 2O)](PIC)2 (where L-orn = L-ornithine, PIC = picrate anion). The molecular structure of comple
Synthesis, structural characterization and DFT analysis of an unusual tryptophan copper(II) complex bound via carboxylate monodentate coordination: Tetraaquabis(L-tryptophan) copper(II) picrate
Husain, Ahmad,Kumar, Girijesh,Sood, Trisha,Walia, Shiwani,Justino, Licínia L.G.,Fausto, Rui,Kumar, Rakesh
, p. 324 - 332 (2018)
Herein, we report the synthesis, spectroscopy, crystal structure and theoretical studies of a new Cu(II) complex with formula [Cu(L-trp)2(H2O)4](pic)2·4H2O (1), which exhibits an unusual tryptophan coordination to copper(II) via carboxylate monodentate binding. The complex has been prepared using the mixed ligand approach. Single crystal X-ray diffraction structural analysis of 1 revealed that, in the complex, the Cu(II) site shows a distorted octahedral geometry, and the tryptophan (trp) ligand is coordinated through the carboxylate group in a monodentate fashion. The picric acid (pic) co-ligand, which is present in the anionic form, resides outside the coordination sphere forming a charge-separated complex. Density Functional Theory (DFT; including time-dependent DFT) has been employed to calculate the equilibrium geometry of the complex as isolated species in dimethylsulfoxide (DMSO) solution, and also its electronic spectrum, which was used to understand details of the experimentally obtained ultraviolet-visible (UV-Vis) spectrum. The structural analysis was complemented by additional spectroscopic studies [infrared (IR) and electron paramagnetic resonance (EPR) spectroscopies], and the thermal stability of the complex evaluated by thermogravimetric analysis (TGA).
A highly copper selective chromogenic calix[4]arene derivative
Qazi, Mansoor Ahmed,Qureshi, Imdadullah,Memon, Shahabuddin
, p. 2579 - 2586 (2011/01/12)
In this article, copper selective complexation behavior of 5,11,17,23-tetrakis[(N,N-dicyclohexylamino)methyl]-25,26,27,28- tetrahydroxycalix[4]arene (4) has been explored. Besides this, the binding ability of 4 toward different metal ions such as Cd2+, Co 2+, Cu2+, Hg2+, Ni2+, Pb 2+ and Zn2+ has been investigated by UV-visible and fluorescence spectroscopies. The chromoionophore 4 shows pronounced selectivity for Cu2+ even in the presence of other metal ions. The results reveal that Cu2+ forms 11 host-guest complex with 4. The FT-IR spectroscopic method has also been applied for further confirmation of complex formation between 4 and Cu2+ and found to be satisfactory.
