Quinone-Annulated N-Heterocyclic Carbene−Transition-Metal Complexes:  Observation of π-Backbonding Using FT-IR Spectroscopy and Cyclic Voltammetry

2006 ◽  
Vol 128 (51) ◽  
pp. 16514-16515 ◽  
Author(s):  
Matthew D. Sanderson ◽  
Justin W. Kamplain ◽  
Christopher W. Bielawski
Keyword(s):  
Cyclic Voltammetry ◽  
Ir Spectroscopy ◽  
Transition Metal ◽  
Metal Complexes ◽  
Transition Metal Complexes ◽  
Ft Ir ◽  
Ft Ir Spectroscopy

Electrochemically Synthesis and Characterization of Copolymers Based on 1, 4-Diethoxybenzene and 3, 4-Ethylenedioxythiophene

2011 ◽  
Vol 335-336 ◽  
pp. 989-993
Author(s):  
Mi Ouyang ◽  
Zhen Wei Yu ◽  
Yi Xu ◽  
Yu Jian Zhang ◽  
Cheng Zhang
Keyword(s):  
Cyclic Voltammetry ◽  
Ir Spectroscopy ◽  
Feed Ratio ◽  
Synthesis And Characterization ◽  
Monomer Mixture ◽  
Long Wavelength ◽  
H Nmr ◽  
Ft Ir ◽  
Ft Ir Spectroscopy

Copolymers based on 1, 4-diethoxybenzene (DEB) and 3, 4-ethylenedioxythiophene (EDOT) were electrochemically synthesized and characterized. The structures of the copolymers were established by 1H NMR and FT-IR spectroscopy. The results indicated the final product was a copolymer instead of a blend or a composite. The physical properties were systematically investigated by cyclic voltammetry, UV-vis absorption and fluorescence. The PL maximum of copolymers presented obviously red-shift to long wavelength as the feed ratio of EDOT in monomer mixture increased.

Syntheses of Chelating Tetrazole-Containing Ligands and Studies of Their Palladium(II) and Ruthenium(II) Complexes

1995 ◽  
Vol 48 (9) ◽  
pp. 1625 ◽  
Author(s):  
AJ Downard ◽  
PJ Steel ◽  
J Steenwijk
Keyword(s):  
Cyclic Voltammetry ◽  
Transition Metal ◽  
Metal Complexes ◽  
Transition Metal Complexes ◽  
Absorption Spectroscopy ◽  
Electronic Absorption ◽  
Ph Control ◽  
Strong Electron ◽  
Ligand Interactions ◽  
Metal Ligand

Eleven chelating tetrazole -containing ligands have been synthesized, and their complexes with palladium(II) and ruthenium(II) prepared. Proton n.m.r. spectroscopy, electronic absorption spectroscopy and cyclic voltammetry have been used to study the nature of the metal-ligand interactions in these complexes. The negatively charged tetrazolate group is shown to be a strong electron donor with very different properties to those of the protonated or alkylated tetrazole group. This leads to pH control of the properties of transition metal complexes containing such ligands.

scholarly journals Preparation, Spectroscopic Characterization and Theoretical Studies of Transition Metal Complexes with 1-[(2-(1H-indol-3-yl)ethylimino)methyl]naphthalene-2-ol Ligand

2019 ◽  
Vol 31 (11) ◽  
pp. 2430-2438 ◽  
Author(s):  
Vian Yamin Jirjees ◽  
Veyan Taher Suleman ◽  
Abbas Ali Salih Al-Hamdani ◽  
Suzan Duraid Ahmed
Keyword(s):  
Transition Metal ◽  
Metal Complexes ◽  
Transition Metal Complexes ◽  
Spectroscopic Characterization ◽  
Bidentate Ligand ◽  
Spectroscopic Techniques ◽  
Theoretical Studies ◽  
Ft Ir ◽  
Uv Visible ◽  
Methyl Naphthalene

A new Schiff base [1-((2-(1H-indol-3-yl)ethylimino)methyl)naphthalene-2-ol] (HL) has been synthesized by condensing (2-hydroxy-1-naphthaldehyde) with (2-(1H-indol-3-yl)ethylamine). In turn, its transition metal complexes were prepared having the general formula; [Pt(IV)Cl2(L)2], [Re(V)Cl2(L)2]Cl and [Pd(L)2], 2K[M(II)Cl2(L)2] where M(II) = Co, Ni, Cu] are reported. Ligand as well as metal complexes are characterized by spectroscopic techniques such as FT-IR, UV-visible, 13C & 1H NMR, mass, elemental analysis. The results suggested that the ligand behaves like a bidentate ligand for all the synthesized complexes. On the other hand, theoretical studies of the ligand as well its metal complexes were conducted at gas phase using HyperChem 8.0. These metal complexes exhibited good antibacterial activity.

Synthesis, Characterization and DNA-Binding Studies of Transition Metal Complexes with Imidazole Ligands

2011 ◽  
Vol 233-235 ◽  
pp. 175-179 ◽  
Author(s):  
Jun Wang ◽  
Xiang Rong Liu ◽  
Yu Jin Sun ◽  
Kan She Li ◽  
Shun Sheng Zhao
Keyword(s):  
Dna Binding ◽  
Transition Metal ◽  
Metal Complexes ◽  
Transition Metal Complexes ◽  
Elemental Analysis ◽  
Binding Studies ◽  
Binding Ability ◽  
Dna Binding Studies ◽  
Ft Ir ◽  
Imidazole Ligands

A series of novel complexes of transition metal (Co, Fe and Mn) with imidaloze have been synthesized and characterized by Elemental Analysis, FT-IR and UV-Vis Absorption spectroscopy. Based on elemental and spectral data, the complexes were found to be of Co(C3H4N2)4(ClO4)2(1), Fe(C3H4N2)3(ClO4)3(2) and Mn(C3H4N2)4(Ac)2(3) (C3H4N2= imidazole). The three complexes and the ligand (imidazole) display DNA binding ability, ascertained by UV-Vis titration.

scholarly journals Synthesis of Compounds Containing Fluorine, Vinylsulfone Groups and Transition Metal Complexes and their Applications to Textiles

2008 ◽  
Vol 5 (s1) ◽  
pp. S997-S1007
Author(s):  
E. Yildiz ◽  
N. Bozok
Keyword(s):  
Transition Metal ◽  
Metal Complexes ◽  
Transition Metal Complexes ◽  
Nickel Complex ◽  
Reactive Dye ◽  
International Standards ◽  
Fastness Properties ◽  
H Nmr ◽  
Ft Ir

A ligand which has reactive dye character and its transition metal complexes such as Cu(II), Co(II), Cr(III), Ni(II) containing vinylsulfone and fluorine groups were synthesized. The diazotation reaction has been studied at 0-5°C carefully. Completion of the reaction was monitored by the TLC method. FT-IR, UV,1H-NMR, TGA and microanalysis methods were used for determination of the synthesized compounds. We assumed that copper complex indicated dimeric structure based on magnetic susceptibility result. All the synthesized compounds which have dye character were applied on cotton, polyamide and nylon fibers. Their dyeing and fastness properties were investigated according to international standards. These properties gave good results for all synthesized dyes except light fastnesses of chromium and nickel complex dyes.

Reductive electropolymerization of N-methyl-3-pyridylethynyl-porphyrins

2015 ◽  
Vol 51 (3) ◽  
pp. 519-521 ◽  
Author(s):  
Sung-Chou Huang ◽  
Ching-Yao Lin
Keyword(s):  
Cyclic Voltammetry ◽  
Ir Spectroscopy ◽  
Theoretical Calculations ◽  
Ft Ir ◽  
Uv Visible ◽  
Ft Ir Spectroscopy

The first reductive electropolymerization of porphyrins was studied by cyclic voltammetry, UV-visible and FT-IR spectroscopy, and theoretical calculations.

scholarly journals Synthesis and Spectral Investigations of Polymeric Hydrazone Schiff Base and its Transition Metal Complexes with Promising Antimicrobial, Anti-Angeogenic and DNA Photo-Cleavage Activities

2019 ◽  
Vol 31 (10) ◽  
pp. 2331-2336 ◽  
Author(s):  
Manoj Kumar ◽  
Anita Rani ◽  
Hardeep Singh Tuli ◽  
Rajshree Khare ◽  
Vinit Parkash
Keyword(s):  
Schiff Base ◽  
Transition Metal ◽  
Metal Complexes ◽  
Transition Metal Complexes ◽  
Schiff Base Ligand ◽  
Biological Activities ◽  
Free Ligand ◽  
Ft Ir ◽  
Bacteria And Fungi

This report describes the synthesis and exploration of novel Schiff base ligand in the form of a polymer (heptamer) which was prepared by reaction between 3,4-diacetyl-2,5-hexanedione and hydrazine hydrate in ethanol. On further reaction of Schiff base with transition metals ions (Co and Cu) leads to formation of its transition metal complexes. The structural identification of Schiff base ligand and its transition metal complexes were characterized by classical structural techniques like FT-IR, NMR and mass spectra. The free ligand and its transition metal complexes have been screened for in vitro biological activities against various strains of bacteria and fungi. The prepared Schiff base and its metal complexes were also screened for antiangiogenic activity. The results have shown the remarkable antimicrobial and antiangiogenic activities of the Schiff base and its metal complexes.

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