262276-71-1Relevant academic research and scientific papers
Synthesis, spectroscopy, electrochemistry and thermal study of Ni(II) and Cu(II) unsymmetrical N2O2 Schiff base complexes
Kianfar, Ali Hossein,Keramat, Liala,Dostani, Morteza,Shamsipur, Mojtaba,Roushani, Mahmoud,Nikpour, Farzad
, (2010)
The new tetradentate unsymmetrical N2O2 Schiff base ligands, Ni(II) and Cu(II) complexes were synthesised and chracterized by IR, UV-vis, 1H NMR and elemental analysis. The electrochemical properties of the Ni(II) complexe
Epoxidation of alkenes by an oxidovanadium(IV) tetradentate Schiff base complex as an efficient catalyst with tert-butyl hydroperoxide
Sedighipoor, Maryam,Kianfar, Ali Hossein,Mahmood, Wan Ahmad Kamil,Azarian, Mohammad Hossein
, p. 116 - 121 (2016/12/27)
A new asymmetrical tetradentate N2O2Schiff base ligand was synthesized from 2-hydroxyacetophenon, 2-hydroxynaphthaldehyde and 1,2 phenylenediimine. The new oxidovanadium(IV) Schiff base complex, VIVOL (L?=?N-2-hydroxyacetophenon-N′-2-hydroxynaphthaldehyde-1,2 phenylenediimine), was prepared by reaction of Schiff base ligand with vanadyl acetylacetonate. The Schiff base ligand (L) and the oxidovanadium(IV) complex were characterized by spectroscopic methods. The crystal structure of the complex was determined by the single crystal X-ray analysis. The complex crystallized in the orthorhombic system, having one V4+ion coordinating in an approximately square pyramidal N2O3geometry by two azomethine N atoms and phenolic oxygens from Schiff base ligand in a square plane and one oxygen atom in an apical position. Electrochemical properties of the complex were examined by means of cyclic voltammetry. The catalytic activity of the oxidovanadium(IV) Schiff base complex was tested in the epoxidation of cyclooctene.
CURING AGENTS FOR EPOXY RESINS
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Paragraph 0207, (2013/03/26)
The present invention relates to curatives for epoxy resins, and compositions (e.g. adhesives) containing such resins cured using the same methods of preparation and uses therefor. More specifically, the present invention relates to hybrid curatives for e
Tetra- and hexadentate Schiff base ligands and their Ni(II), Cu(II) and Zn(II) complexes. Synthesis, spectral, magnetic and thermal studies
Ismail, Tarek M.A.,Saleh, Akila A.,Ghamry, Mosad A. El
experimental part, p. 276 - 288 (2012/01/31)
Tetradentate N2O2, N4 Schiff bases, 1,2-bis(4-oxopent-2-ylideneamino) benzene (BOAB), 1-(4-oxopent-2-ylideneamino-2- [(2-hydroxyphenyl)ethylideneamino] benzene (OAHAB), 7,16-bis(4- chlorobenzylidene)-6,8,15,17-tetra-methyl-7,16-dihydro -5,9,14,18-tetraza- dibenzo[a,h] cyclo tetradecene (BCBDCT), 7,16-bis(2-hydroxy-benzylidene)-6,8,15, 17-tetramethyl-7,16-dihydro-5,9,14,18-tetraza-dibenzo [a,h] cyclo tetradecene (BHBDCT) and hexadentate N4O2 Schiff bases, 2,4-bis {2-[1-(2-hydroxyphenyl) ethylideneamino] phenylimino}-3-(2-hydroxybenzylidene) pentane (BHAPHP), 2,4-bis {2-[1-(2-hydroxyphenyl) ethylideneamino] phenylimino}-3-(4-chlorobenzylidene) pentane (BHAPCP) were prepared and characterized by elemental analysis, IR, UV-Vis, 1H NMR and mass spectra. The solid complexes of the prepared Schiff base ligands with Ni(II), Cu(II) and Zn(II) ions were isolated and characterized by elemental and thermal analyses, IR, electronic and ESR spectra as well as conductance and magnetic susceptibility measurements. The results showed that most complexes have octahedral geometry but few can attain the tetrahedral arrangement. The TG analyses suggest high stability for most complexes followed by thermal decomposition in different steps. The kinetic and thermodynamic parameters for decomposition steps in Cu(II) complexes thermograms have been calculated.
Curing agents for epoxy resins
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Page/Page column 62, (2012/10/23)
A variety of curing agents for epoxy resins and methods for preparation thereof are disclosed, including compounds having the structures of formulas III and IV: wherein each of R1, R2, R3, R4, and R5
Synthesis, spectroscopy, electrochemistry and thermal study of vanadyl unsymmetrical Schiff base complexes
Kianfar, Ali Hossein,Sobhani, Vida,Dostani, Morteza,Shamsipur, Mojtaba,Roushani, Mahmoud
scheme or table, p. 108 - 112 (2011/03/21)
The new tetradentate unsymmetrical N2O2 Schiff base ligands and VO(IV) complexes were synthesised and characterized by using IR, UV-Vis and elemental analysis. The electrochemical properties of the vanadyl complexes were investigated
Non-symmetrical tetradentate vanadyl Schiff base complexes derived from 1,2-phenylene diamine and 1,3-naphthalene diamine as catalysts for the oxidation of cyclohexene
Boghaei, Daver M,Mohebi, Sajjad
, p. 5357 - 5366 (2007/10/03)
Two series of the novel unsymmetrical diimino tetradentate Schiff bases derived from phenylenediamine and 1,3-naphthalene diamine and their vanadyl complexes were synthesized by template and non-template methods and characterized by 1H, 13C NMR, IR, UV-Vis and elemental analysis. These complexes are used as catalysts for the selective aerobic oxidation of cyclohexene. The catalytic activity increases as the number of electron-donor groups decreases, and the catalytic selectivity is varied by changing the substituents on the ligands. The catalytic system described here is an efficient and inexpensive method for the oxidation of olefins, with the advantages of high activity, selectivity, re-usability and short reaction times. Complexes containing the naphthylene bridged ligands had similiar redox potentials, however, their catalytic activities are quite varied. This difference in their activity is strongly dependent on fine structural data and ΔEp. But in the complexes containing phenylene bridged ligands, comparing the GC, redox potential and ΔEp measurements yields a good correlation between catalytic activity and redox potential and a slight corrolation to selectivity. In general, the conversion percentage decreases with the increase of ΔEp and decrease of Eredox0′.
