Applied Chemistry
Milad Kazemnejadi; Aliakbar Dehno Khalaji; Hossein Mighani
Volume 5, Issue 3, pp. 237-363, Serial No. 16 , July 2017, , Pages 237-241
Abstract
Schiff base sal-2,5-Clan = 2-(2,5-dichlorobenzylideneamino)phenol used as a new precursor for preparation of poly-2-(2,5-dichlorobenzylideneamino)phenol (PDCBAP). In an aqueous alkaline medium, NaOCl oxidant is capable of oxidative poly-condensation reaction (OP). Both sal-2,5-Clan and PDCBAP were characterized ...
Read More
Schiff base sal-2,5-Clan = 2-(2,5-dichlorobenzylideneamino)phenol used as a new precursor for preparation of poly-2-(2,5-dichlorobenzylideneamino)phenol (PDCBAP). In an aqueous alkaline medium, NaOCl oxidant is capable of oxidative poly-condensation reaction (OP). Both sal-2,5-Clan and PDCBAP were characterized by solubility tests, FT-IR, 1H-NMR spectroscopy and TG-DTA studies. FT-IR and 1H-NMR spectrum of PDCBAP indicates the formation of Ar-O-Ar bond. According to TG/DTA curves, PDCBAP demonstrated higher resistance against temperature than sal-2,5-Clan. At optimum reaction conditions, viz. time = 14h, [NaOCl]0 = 0.12 M, [KOH]0 = 0.1 M and T = 90°C, the yield of PDCBAP is 52.17%. Thermal studies indicated that PDCBAP is more stable than sal-2,5-Clan.
Organic chemistry
Aliakbar Dehno Khalaji; Salar Hafez Goran; Sepideh Mehrani; Karla Fejfarova; Michal Dusek
Volume 5, Issue 2, pp. 121-236, Serial No. 15 , April 2017, , Pages 186-194
Abstract
In this paper, the structure of a new 16-membered macrocyclic Schiff base compound N,N′-(3,3′-dimethoxy-2,2′-(propane-1,3-diyldioxy)dibenzylidene)propane-1,3-diamine, C22H26N2O4 (1), derived from 1,3-propanediamine and 3,3′-dimethoxy-2,2′-(propane-1,3-diyldioxy)dibenzaldehyde ...
Read More
In this paper, the structure of a new 16-membered macrocyclic Schiff base compound N,N′-(3,3′-dimethoxy-2,2′-(propane-1,3-diyldioxy)dibenzylidene)propane-1,3-diamine, C22H26N2O4 (1), derived from 1,3-propanediamine and 3,3′-dimethoxy-2,2′-(propane-1,3-diyldioxy)dibenzaldehyde has been studied by single crystal X-ray diffraction, DFT calculations at B3LYP/6-31G** and FT-IR spectroscopy. The title compound crystallizes in the monoclinic space group P21/n with unit cell parameters: a = 16.3273 (5) Å, b = 7.0832 (2) Å, c = 16.8586 (4) Ǻ, β = 93.135 (2)°, V = 1946.77 (9) Å3 and Z=4. The optimized molecular geometry agrees closely to that obtained from single crystal X-ray crystallography. The FT-IR spectrum (4000-400 cm-1) was recorded and compared with that of the calculated spectrum.
Nanochemistry
Aliakbar Dehno Khalaji; Fatemeh Gharib
Volume 4, Issue 3, pp. 236-358, Serial No. 12 , July 2016, , Pages 265-272
Abstract
In this paper, nickel oxide (NiO) nanoparticles have been prepared by solid state thermal decomposition of an acyclic nickel(II) complex (1,2-bis(2-formyl-3-methoxyphenyl)propane)nickel(II) chloride, [NiL]Cl2, in an electrical furnace at optimal temperature, 450 ºC for 3.5 h. The nickel(II) complex ...
Read More
In this paper, nickel oxide (NiO) nanoparticles have been prepared by solid state thermal decomposition of an acyclic nickel(II) complex (1,2-bis(2-formyl-3-methoxyphenyl)propane)nickel(II) chloride, [NiL]Cl2, in an electrical furnace at optimal temperature, 450 ºC for 3.5 h. The nickel(II) complex is obtained via solid state synthesis using nickel(II) chloride and tetradentate O4 acyclic ligand 1,2-bis(2-formyl-3-methoxyphenyl)propane. The structure and morphology of NiO nanoparticles are characterized by Fourier transform infrared spectroscopy (FT-IR), powder X-ray diffraction (XRD), scanning electron microscopy (SEM) and transmission electron microscopy (TEM). XRD and TEM analysis show that NiO nanoparticles have pure and cubic phase with the average size of 5-10 nm.