scholarly journals Synthesis, Characterization and Thermal Analysis of New Cu(II) Complexes with Hydrazide Ligands

2010 ◽  
Vol 7 (s1) ◽  
pp. S278-S282 ◽  
Author(s):  
Saber Rajaei ◽  
Shahriare Ghammamy ◽  
Kheyrollah Mehrani ◽  
Hajar Sahebalzamani
Keyword(s):  
Thermal Stability ◽  
Thermal Analysis ◽  
Acetic Acid ◽  
Ir Spectroscopy ◽  
Coordination Mode ◽  
Azomethine Nitrogen ◽  
Excellent Thermal Stability ◽  
Spectral Techniques ◽  
Ft Ir ◽  
New Compounds

A number of new complexes have been synthesized by reaction of novel ligands acetic acid(4-methyl-benzylidene)hydrazide (L1) and acetic acid(naphthalen-1-ylmethylene)hydrazide (L2) with copper(II) nitrate. These new compounds were characterized by elemental analysis, TG, DTA, IR spectroscopy, UV spectral techniques. The changes observed between the FT-IR and UV-Vis spectra of the ligands and of the complexes allowed us to establish the coordination mode of the metal in complexes. The results suggest that the Schiff bases L1and L2coordinate as univalent anions with their bidentate N,O donors derived from the carbonyl and azomethine nitrogen. Also the probing of thermal analysis complexes can detect which complex has excellent thermal stability.

scholarly journals Synthesis, Characterization and Thermal Analysis of a New Acetic Acid (2-Hydroxy-benzylidene)-hydrazide and its Complexes with Hg(II) and Pd(II)

2011 ◽  
Vol 8 (s1) ◽  
pp. S13-S18
Author(s):  
Hajar Sahebalzamani ◽  
Shahriare Ghammamy ◽  
Shaghayegh Dexhkam ◽  
Alireza Hemati Moghadam ◽  
Farhod Siavoshifar
Keyword(s):  
Thermal Analysis ◽  
Thermal Decomposition ◽  
Acetic Acid ◽  
Thermal Properties ◽  
Nmr Spectroscopy ◽  
Coordination Mode ◽  
Spectral Techniques ◽  
H Nmr ◽  
Multi Stage ◽  
Ft Ir

The new complexes have been synthesized by the reaction of Hg(II) and Pd(II) with acetic acid(2-hydroxy-benzylidene)- hydrazide (L). These new complexes were characterized by elemental analysis, IR, H NMR spectroscopy and UV spectral techniques. The changes observed between the FT-IR, H NMR and UV-Vis spectra of the ligands and of the complexes allowed us to establish the coordination mode of the metal in complexes. Thermal properties, TG-DTA of these complexes were studied. TG- DTA and other analytical methods have been applied to the investigation of the thermal behavior and structure of the compounds [M(L)2]Cl2M= Hg, Pd. Thermal decomposition of these compounds is multi-stage processes.

Synthesis, Characterization of Poly(Aryl Ether Sulfone)s Based on Naphthalene Isomers

2012 ◽  
Vol 490-495 ◽  
pp. 3698-3702
Author(s):  
Su Xia Zhang ◽  
Yi Hong Tang ◽  
Yan Lu ◽  
Ya Ming Niu
Keyword(s):  
Thermal Stability ◽  
Thermal Analysis ◽  
Glass Transition ◽  
Ir Spectroscopy ◽  
Aryl Ether ◽  
Excellent Thermal Stability ◽  
Glass Transition Temperatures ◽  
Thermal Stability Of ◽  
Good Agreement

Six new poly(aryl ether sulfone)s were synthesized from 1,5-, 2,6- and 2,7- Bis-(4-fluorosulfonyl)naphthalene isomers with different diphenol. The structure of the poly(aryl ether sulfone)s were characterized by IR spectroscopy and elemental analysis, and the results were in good agreement with the expected structures. The glass transition temperatures were found to be in the range 219-236oC by DSC thermal analysis. The WAXD and thermogravimetric analyses revealed amorphous morphology and excellent thermal stability of the polymers.

Novel authigenic gas foaming hydrogels for preventing coal spontaneous combustion

e-Polymers ◽  
2015 ◽  
Vol 15 (5) ◽  
pp. 361-368 ◽  
Author(s):  
Xiangming Hu ◽  
Weimin Cheng ◽  
Zhenlu Shao
Keyword(s):  
Thermal Stability ◽  
Thermal Analysis ◽  
Acetic Acid ◽  
Electron Microscope ◽  
Scanning Electron Microscope ◽  
Substantial Effect ◽  
Foaming Agent ◽  
Synchronous Thermal Analysis ◽  
Gas Foaming ◽  
Scanning Electron

AbstractAuthigenic gas foaming hydrogels were synthesized using chitosan (CS), acrylic acid, and attapulgite (APT) as hydrophilic monomers; potassium persulfate as initiator; N,N′-methylenebisacrylamide as cross-linker; and sodium carbonate (Na2CO3)/acetic acid as foaming agent. Effects of different monomers, amount of foaming agent, and temperature on swelling ratio (SR) of the hydrogels were examined. Morphology, structure, and thermal stability of authigenic gas foaming hydrogels were studied using field emission scanning electron microscope, Fourier-transform infrared spectroscopy, and synchronous thermal analysis. Scanning electron microscope images reveal apparent pores on hydrogels, produced by foaming agent Na2CO3/acetic acid. Therefore, more foaming agent would bring more pores on hydrogels. Synchronous thermal analysis results suggest that higher amount of CS would result in higher thermostability of hydrogels. However, APT has no substantial effect on thermal stability. SR decreases with increasing amount of CS. Hydrogels prepared at 70°C reaction temperature exhibit maximum swelling. Furthermore, SR decreases with higher covalence of saltion.

scholarly journals Honey bee odorant-binding protein 14: effects on thermal stability upon odorant binding revealed by FT-IR spectroscopy and CD measurements

2013 ◽  
Vol 43 (2-3) ◽  
pp. 105-112 ◽  
Author(s):  
Andreas Schwaighofer ◽  
Caroline Kotlowski ◽  
Can Araman ◽  
Nam Chu ◽  
Rosa Mastrogiacomo ◽  
...  
Keyword(s):  
Thermal Stability ◽  
Ir Spectroscopy ◽  
Honey Bee ◽  
Binding Protein ◽  
Odorant Binding Protein ◽  
Ft Ir ◽  
Odorant Binding ◽  
Ft Ir Spectroscopy

scholarly journals AC conductivity and dielectric behavior of poly (o-phenylenediamine)/TiO2 nanocomposites

2017 ◽  
Vol 5 (1) ◽  
pp. 29
Author(s):  
Archana S.
Keyword(s):  
Thermal Stability ◽  
Polymer Nanocomposites ◽  
Ac Conductivity ◽  
Oxidative Polymerization ◽  
Dielectric Behavior ◽  
High Thermal Stability ◽  
Spectral Techniques ◽  
Vis Spectroscopy ◽  
Ft Ir ◽  
The Stability

Poly (o-phenylenediamine) and their nanocomposites with TiO2 nanoparticles were synthesized using oxidative polymerization technique and the polymer nanocomposites were characterized using spectral techniques like FT-IR, UV-VIS spectroscopy and the morphology have been analyzed by XRD, SEM and TEM. The stability of the prepared polymer nanocomposites was studied using TGA, DTA and found to have high thermal stability. The study of ac conductivity, dielectric property revealed that the formed nanocomposites are semiconducting in nature and can be widely used in the field of energy storage and semiconductor devices, in diodes, batteries etc.

scholarly journals A facile and concise route to (hydroxybenzoyl)pyrido[2,3-d]pyrimidine heterocycle derivatives: synthesis, and structural, spectral and computational exploration

RSC Advances ◽  
2019 ◽  
Vol 9 (59) ◽  
pp. 34567-34580 ◽  
Author(s):  
Abida Ashraf ◽  
Muhammad Khalid ◽  
Muhammad Nawaz Tahir ◽  
Muhammad Yaqub ◽  
Muhammad Moazzam Naseer ◽  
...  
Keyword(s):  
Electronic Structure ◽  
Ir Spectroscopy ◽  
X Ray Diffraction ◽  
Spectral Techniques ◽  
X Ray ◽  
Chemical Structures ◽  
Computational Exploration ◽  
Ft Ir ◽  
Ft Ir Spectroscopy ◽  
C Nmr

The chemical structures of the title compounds were ascertained by spectral techniques including 1H, 13C NMR, UV-vis and FT-IR spectroscopy as well as single-crystal X-ray diffraction, and DFT computation adopted to analyze the electronic structure.

Synthesis, crystal structures and characterizations of three new copper(II) complexes including anti-inflammatory diclofenac

2019 ◽  
Vol 75 (4) ◽  
pp. 388-397 ◽  
Author(s):  
Sevim Hamamci Alisir ◽  
Necmi Dege ◽  
Recep Tapramaz
Keyword(s):  
Thermal Analysis ◽  
Ir Spectroscopy ◽  
Magnetic Data ◽  
X Ray Diffraction ◽  
Paramagnetic Resonance ◽  
X Ray ◽  
Ft Ir ◽  
Fourier Transform Ir ◽  
Electron Paramagnetic ◽  
Ft Ir Spectroscopy

Three new diclofenac-based copper(II) complexes, namely tetrakis{μ-2-[2-(2,6-dichloroanilino)phenyl]acetato-κ2 O:O′}bis(methanol-κO)copper(II), [Cu2(μ-dicl)4(CH3OH)2] (1), bis{2-[2-(2,6-dichloroanilino)phenyl]acetato-κ2 O,O′}bis(1-vinyl-1H-imidazole-κN 3)copper(II), [Cu(dicl)2(vim)2] (2), and bis{2-[2-(2,6-dichloroanilino)phenyl]acetato-κ2 O,O′}bis(1H-imidazole-κN 3)copper(II), [Cu(dicl)2(im)2] (3) [dicl is diclofenac (C14H10Cl2NO2), vim is 1-vinylimidazole (C5H6N2) and im is imidazole (C3H4N2)], have been synthesized and characterized by elemental analysis, FT–IR spectroscopy, thermal analysis and single-crystal X-ray diffraction. X-ray diffraction analysis shows that complex 1 consists of dimeric units in which the dicl ligand exhibits a bidentate syn,syn-μ2 coordination mode linking two copper(II) centres. Complexes 2 and 3 have mononuclear units with the general formula [Cu(dicl)2 L 2] (L is vim or im) in which the CuII ions are octahedrally coordinated by two L and two dicl chelating ligands. The L and dicl ligands both occupy the trans positions of the coordination octahedron. The different coordination modes of dicl in the title complexes were revealed by Fourier transform IR (FT–IR) spectroscopy. The spin matching between the copper(II) centres in the dimeric [Cu2(μ-dicl)4(CH3OH)2] units was also confirmed by magnetic data to be lower than the spin-only value and electron paramagnetic resonance (EPR) spectra. The thermal properties of the complexes were investigated by thermogravimetric (TG) and differential thermal analysis (DTA) techniques.

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