Novel Schiff Bases with Oxime Groups and Their Homo- and Heteronuclear Copper(II) Complexes

2007 ◽  
Vol 72 (10) ◽  
pp. 1383-1397 ◽  
Author(s):  
Bülent Dede ◽  
Fatma Karipcin ◽  
Mustafa Cengiz
Keyword(s):  
Schiff Bases ◽  
Inductively Coupled Plasma ◽  
Thermal Analyses ◽  
Optical Emission ◽  
Schiff Base Ligands ◽  
Inductively Coupled ◽  
Imine Nitrogen ◽  
Elemental Analyses ◽  
Ft Ir ◽  
C Nmr

Two novel tetradentate Schiff bases containing oxime groups and their homodinuclear, homotrinuclear Cu(II) and heterodinuclear Cu(II)-Mn(II) and Cu(II)-Co(II) complexes were synthesized. The Schiff base ligands (H2L1 and H2L2) were prepared by condensing of diethylenetriamine with 2-(biphenyl-4-yl)-N-(4-chlorophenyl)-N'-hydroxy-2-oxoacetimidamide (HL1) and 2-(biphenyl-4-yl)-N'-hydroxy-N-(4-methylphenyl)-2-oxoacetimidamide (HL2). Structure assignments are supported by a combination of FT-IR, elemental analyses, inductively coupled plasma optical emission spectroscopy (ICP-OES), magnetic susceptibility, molar conductivity and thermal analyses studies. The free ligands were also characterized by 1H and 13C NMR spectra. Elemental analyses, stoichiometric and spectroscopic data indicated that the metal:ligand ratio is 2:1 for the dinuclear copper(II) complexes and 3:2 for the trinuclear copper(II) complexes. The copper(II) ions are coordinated to the oxime and imine nitrogen atoms. Pyrolytic decomposition occurred in melting the metal complexes and metal oxides were the ultimate products.

Synthesis and Characterization of Isobutyl-Chitosan-Ca(II) Complexes

2014 ◽  
Vol 809-810 ◽  
pp. 503-506
Author(s):  
Sheng Nan Zhao ◽  
Chang Ping Wei ◽  
Li Dan Dong ◽  
Xin Liu ◽  
Jing Li ◽  
...  
Keyword(s):  
Inductively Coupled Plasma ◽  
Diffuse Reflectance Spectrum ◽  
Optical Emission ◽  
Uv Spectra ◽  
Emission Spectrometry ◽  
Alkylation Reaction ◽  
Icp Oes ◽  
Inductively Coupled ◽  
Alkaline Conditions ◽  
Ft Ir

Through an alkylation reaction under alkaline conditions, isobutyl was introduced to chitosan to form isobutyl-chitosan. Isobutyl-chitosan-Ca (II) complex was synthesized at pH 6.0 by a reaction of isobutyl-chitosan and calcium chloride. The structure of isobutyl-chitosan-Ca (II) complexes was characterized by ultraviolet-visible diffuse reflectance spectrum (UV-Vis) and FT-IR spectrum, and the content of calcium was measured by inductively coupled plasma-optical emission spectrometry (ICP-OES). The FT-IR spectra of isobutyl-chitosan and chitosan showed that structure of isobutyl-chitosan-Ca (II) complexes was obviously different with isobutyl-chitosan. Results of UV spectra showed that the maximum absorption of isobutyl-chitosan and isobutyl-chitosan-Ca (II) were at 310 nm and 324 nm, respectively. The content of calcium was 1.6026%, measured by ICP-OES.

scholarly journals Facile Analytical Methods to Determine the Purity of Titanium Tetrachloride

2018 ◽  
Vol 2018 ◽  
pp. 1-5
Author(s):  
Dongwook Lim ◽  
Sang-Deuk Kim ◽  
Hyungseok Kong ◽  
Daehyeon Nam ◽  
Sang Eun Shim ◽  
...  
Keyword(s):  
Inductively Coupled Plasma ◽  
Optical Emission Spectroscopy ◽  
Titanium Tetrachloride ◽  
Optical Emission ◽  
Icp Oes ◽  
Simple Method ◽  
Qualitative And Quantitative ◽  
Inductively Coupled ◽  
Ft Ir ◽  
Quantitative Properties

We propose a simple method to investigate both the qualitative and quantitative properties of titanium tetrachloride. The selection and concentration of the employed solvent were found to be very important in the analysis of highly reactive titanium tetrachloride (TiCl4). Herein, we employed various concentrations of an acid solution to serve as a stabilizing medium. Qualitative analysis was performed via Fourier transform-infrared spectroscopy (FT-IR) and scanning electron microscope-energy dispersive spectroscopy (SEM-EDS). Additionally, the quantitative analysis was performed via inductively coupled plasma optical emission spectroscopy (ICP-OES). We concluded that both the qualitative and quantitative properties of titanium tetrachloride could be easily measured using a specific acidic solvent as a medium.

scholarly journals Mode of Action of Condensed- and Gaseous-Phase Fire Retardation in Some Phosphorus-Modified Polymethyl Methacrylate- and Polystyrene-Based Bulk Polymers

Polymers ◽  
2021 ◽  
Vol 13 (19) ◽  
pp. 3402
Author(s):  
Paul Joseph ◽  
Malavika Arun ◽  
Stephen Bigger ◽  
Maurice Guerrieri ◽  
Doris Pospiech ◽  
...  
Keyword(s):  
Polymethyl Methacrylate ◽  
Gaseous Phase ◽  
Inductively Coupled Plasma ◽  
Optical Emission ◽  
Bulk Polymerization ◽  
Inductively Coupled ◽  
Gaseous Products ◽  
Phosphorus Containing ◽  
Ft Ir ◽  
Bulk Polymers

The aspects of fire retardation in some phosphorus-modified polymethyl methacrylate (PMMA) and polystyrene (PSt) polymers are reported in the present paper. Both additive and reactive strategies were employed to obtain the desired level of loading of the phosphorus-bearing compound/moiety (2 wt.% of P in each case). Test samples were obtained using bulk polymerization. The modifying compounds contained the P-atom in various chemical environments, as well as in an oxidation state of either III or V. With a view to gain an understanding of the chemical constitution of the gaseous products formed from the thermal decomposition of liquid additives/reactives, these materials were subjected to GC/MS analysis, whereas the decomposition of solid additives was detailed using the pyrolysis-GC/MS technique. Other investigations included the use of: Inductively-coupled Plasma/Optical Emission Spectroscopy (ICP/OES), solid-state NMR and FT-IR spectroscopy. In the case of PMMA-based systems, it was found that the modifying phosphonate ester function, upon thermal cracking, produced ‘phosphorus’ acid species which initiated the charring process. In the case of solid additives, it is more likely that the resultant phosphorus- and/or oxygenated phosphorus-containing volatiles acted as flame inhibitors in the gaseous phase. With the PSt-based systems, a probable process involving the phosphorylation of the phenyl groups leading to crosslinking and char formation is feasible.

Evolution of the mineral concentration and bioaccumulation of the black soldier fly, Hermetia illucens, feeding on two different larval media

2021 ◽  
pp. 1-12
Author(s):  
P. Rubio ◽  
J.L Todolí ◽  
A. Martínez-Sánchez ◽  
S. Rojo
Keyword(s):  
Inductively Coupled Plasma ◽  
Optical Emission ◽  
Bioaccumulation Factor ◽  
Mineral Concentration ◽  
Black Soldier Fly ◽  
Hermetia Illucens ◽  
Inductively Coupled ◽  
Feed Industry ◽  
Elemental Analyses ◽  
Optical Emission Spectrometer

Intensive black soldier fly (BSF) Hermetia illucens (Diptera: Stratiomyidae) rearing has a great importance for the feed industry. The objective of the present work was to perform a systematic study about the effect of the feeding media on the concentration and bioaccumulation factor (BAF) of Ca, K, Mg, Na, Cr, Cu, Fe, Mn, Ni and Zn in BSF fractions. Therefore, the evolution of the concentration of these elements has been studied along the stages of the BSF life cycle (larva, pupa and adult) as well as during its growth (exuviae) and metamorphosis (empty puparia). Two diets consisting of beer bagasse and commercial hen feed moistened with water have been chosen. An inductively coupled plasma optical emission spectrometer has been used to perform the elemental analyses. The obtained results demonstrated that the behaviour was generally, similar for all the elements studied, i.e. an accumulation in exuviae and puparia followed by their further elimination. Moreover, no significant differences in the results as a function of the feeding media have been found. This may be attributed to the fact that the chosen diets were equally favourable for this insect’s growth. The obtained concentrations have been expressed on a dry as well as a wet sample basis. BAF results also suggested that exuviae and puparia could be used as supplements or as bioactive compounds.

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