scholarly journals Φωτοκαταλυτική αναγωγή του νερού με χρήση διθειολενικών συμπλόκων

2016 ◽  
Author(s):  
Ευγενία Κουτσούρη
Keyword(s):  
Hydrogen Production ◽  
Visible Region ◽  
Electron Donors ◽  
Sodium Ascorbate ◽  
Synthesis And Characterization ◽  
Chemistry Department ◽  
Thermal Conductivity Detector ◽  
Ft Ir ◽  
Phd Thesis

This work was conducted within the PhD thesis in the field of Inorganic Chemistry andInorganic Technology, at the Inorganic Laboratory of the Chemistry Department of UoA. Itcovers literature photocatalytic systems for hydrogen production with homogeneousphotocatalysis, whereas experimental deals with the synthesis and characterization of complexesthat show strong absorptions in the visible region and could act as chromophores orphotocatalysts for hydrogen production. During this thesis complexes [Cu(4,4΄-dcbpy)2]Cl,where dcbpy=2,2'-bypiridine-4,4'-dicarboxylate and [Cu(5,5΄-dcbpy)2]Cl, where dcbpy=2,2'-bypiridine-5,5'-dicarboxylate, which can be used as proton reductive catalysts, have beensynthesized. Also, rhenium complexes have been prepared following the literature procedures:[Rebpy(CO)3Br], [Rebpy(CO)3Cl], [Rebpy(CO)3(MeCN)](PF6), [Rebpy(CO)3(NCS)](PF6),which can be used as chromophores. All these complexes were characterized byphysicochemical methods, FT-IR, UV-Vis, 1H-NMR, cyclic voltammetry (CV), andspectroscopy methods, emission. During this thesis the photocatalytic systems have been testedfor hydrogen production where the complexes [Rebpy(CO)3Br], [Rebpy(CO)3Cl],[Rebpy(CO)3(MeCN)](PF6), [Rebpy(CO)3(NCS)](PF6), [Ru(bpy)3]Cl2, [Ru(dcbpy)2Cl2],[Ru(dcbpy)2qdt] were used as photosensitizers (PS), the complexes [Ni{S2C2(Ph)2}2],[Ni{S2C2(Ph)2}2](NEt4), [Ni{S2C2(Ph)(Ph-OCH3-4)}2], [Ni{S2C2(Ph)(Ph-OCH3-4)}2](NEt4),[Ni{S2C2(Ph-OCH3-4)2}2], [Ni{S2C2(Ph-OCH3-4)2}2](NEt4), [Ni{S2C2(Ph)2}2C3],[Ni{S2C2(Ph)(Ph-OCH3-4)}2C3], [Ni{S2C2(Ph-OCH3-4)2}2C3], [Ni(bdt)2](TBA), [Ni(bdt)2C3],[Ni(S4C3)Fe(CO)Cp*](BF4), [W{S2C2(C6H5)2}3], [W{S2C2(C6H5)2}3](TBA), [Cu(4,4΄-dcbpy)2]Cl, and [Cu(5,5΄-dcbpy)2]Cl as proton reductive catalysts, and the speciestriethanolamine TEOA and ascorbic acid/sodium ascorbate as sacrificial electron donors. Σhesolvents used were DMF, DMF/ H2O, CH3CN/H2O, acetone, CH2Cl2, H2O. For the detection ofH2 a gas chromatographer with a thermal conductivity detector (TCD) was used.

scholarly journals Synthesis and Characterization of Cobalt Oxide Nanoparticles

2018 ◽  
Vol 4 (5) ◽  
pp. 475-477 ◽  
Author(s):  
K. Prema Latha ◽  
C. Prema ◽  
S. Meenakshi Sundar
Keyword(s):  
Crystallite Size ◽  
Cobalt Oxide ◽  
Visible Region ◽  
Synthesis And Characterization ◽  
Oxide Nanoparticles ◽  
Face Centered Cubic ◽  
Cobalt Oxide Nanoparticles ◽  
Vis Spectroscopy ◽  
Ft Ir

The present work reports the synthesis and characterization of cobalt oxide nanoparticles. Microwave oven method was used for synthesizing cobalt oxide nanoparticles. The synthesized nanoparticles were characterized by X-ray diffraction (XRD), Fourier transform infrared spectroscopy (FT-IR), UV-Vis spectroscopy, photoluminescence (PL) and scanning electron microscope (SEM). The prepared samples show poor crystalline nature so that the samples were calcined at 300 °C for 1 hr. The calcined samples were characterized for further changes in its morphology. XRD identifies the sample is in Co3O4 phase with face-centered cubic structure. Debye-Scherer formula was used to calculate the average crystallite size of the annealed sample and it was found to be 7 to 28 nm. In addition to crystallite size, specific surface area, dislocation density and microstrain are calculated using XRD. Williamson-Hall plot was used to calculate the size and strain. FT-IR spectrum shows two stretching bands at 660 and 550 cm−1 which confirm the functional group present in the cobalt oxide nanoparticles. In optical absorption studies, a blue shift in the energy band gap reveals the quantum confinement effect. Photoluminescence spectra shows emission peak in the visible region.

One Step Synthesis and Characterization of Zirconia-Graphene Composites

2012 ◽  
Vol 600 ◽  
pp. 174-177 ◽  
Author(s):  
Jian Fei Xia ◽  
Zong Hua Wang ◽  
Yan Zhi Xia ◽  
Fei Fei Zhang ◽  
Fu Qiang Zhu ◽  
...  
Keyword(s):  
Synthesis And Characterization ◽  
Two Dimensional ◽  
X Ray Diffraction ◽  
X Ray ◽  
Graphene Composite ◽  
Transmission Electron ◽  
One Step ◽  
Ft Ir ◽  
Xrd Techniques

Zirconia-graphene composite (ZrO2-G) has been successfully synthesized via decomposition of ZrOCl2•6H2O in a water-isopropanol system with dispersed graphene oxide (GO) utilizing Na2S as a precursor could enable the occurrence of the deposition of Zr4+ and the deoxygenation of GO at the same time. Transmission electron microscopy (TEM), Fourier transform infrared spectroscopy (FT-IR) and X-ray diffraction (XRD) techniques were used to characterize the samples. It was found that graphene were fully coated with ZrO2, and the ZrO2 existing in tetragonal phase, which resulted in the formation of two-dimensional composite.

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.

scholarly journals Synthesis and Characterization of Some Novel Oxazine, Thiazine and Pyrazol Derivatives

2016 ◽  
Vol 13 (2) ◽  
pp. 244-252
Author(s):  
Baghdad Science Journal
Keyword(s):  
Acetic Acid ◽  
Ir Spectra ◽  
Glacial Acetic Acid ◽  
Basic Medium ◽  
Synthesis And Characterization ◽  
Pyrazole Derivatives ◽  
Phenyl Hydrazine ◽  
H Nmr ◽  
Ft Ir

In this paper, some chalcone derivatives (C1, C2) were synthesized based on the reaction of equal amount of substituted acetophenone and substituted banzaldehyde in basic medium. Oxazine and thiazine derivatives were prepared from the reaction of chalcones (C1-C2) with urea and thiourea respectively in a basic medium. Pyrazole derivatives were prepared based on the reaction of chalcones with hydrazine mono hydrate or phenyl hydrazine in the presence of glacial acetic acid as a catalyst. The new synthesized compounds were identified using various physical techniques like1 H-NMR and FT-IR spectra.

scholarly journals Synthesis and Characterization of some New 1,3,4-Oxadiazole derivatives based on 4-amino benzoic acid

2016 ◽  
Vol 13 (4) ◽  
pp. 762-769
Author(s):  
Baghdad Science Journal
Keyword(s):  
Schiff Base ◽  
Benzoic Acid ◽  
Spectral Data ◽  
1H Nmr ◽  
Synthesis And Characterization ◽  
Oxadiazole Derivatives ◽  
Ft Ir ◽  
Amino Benzoic Acid

Various of 2,5- disubstituted 1,3,4-oxadiazole (Schiff base, ?- lactam and azo) were synthesized from 2,5-di (4,4?-amino-1,3,4-oxadiazole which usequently synth-esized from mixture of 4- amino benzoic acid and hydrazine arch of polyphosphorus acid. The synthesized compounds were cherecterized by using some spectral data (UV, FT-IR , and 1H-NMR)

Synthesis and Characterization of an Alendronate-Chitosan Conjugate

2011 ◽  
Vol 140 ◽  
pp. 53-57 ◽  
Author(s):  
Xiao Hong Shao ◽  
Ji Qing Xu ◽  
Yan Peng Jiao ◽  
Chang Ren Zhou
Keyword(s):  
Drug Delivery ◽  
Drug Delivery System ◽  
Synthesis And Characterization ◽  
Hydroxyl Groups ◽  
Amino Groups ◽  
H Nmr ◽  
Ft Ir ◽  
Novel Drug Delivery System ◽  
Novel Drug

The biomineral-binding alendronate-chitosan conjugate (Scheme 1) was developed as a novel drug delivery system. Alendronate was conjugated to the hydroxyl groups of chitosan, thereby maintaining the amino groups of chitosan intact. By means of FT-IR and 1H NMR, the characterization was conducted to confirm the successful synthesis of alendronate-chitosan conjugate.

scholarly journals Synthesis and Characterization of 2-Pyrazoline Derivatives and their in silico and in vitro Studies on Antimicrobial and Anticancer Activities

2019 ◽  
Vol 31 (10) ◽  
pp. 2191-2196 ◽  
Author(s):  
S. Rathinamanivannan ◽  
K. Megha ◽  
Raja Chinnamanayakar ◽  
Ashok Kumar ◽  
M.R. Ezhilarasi
Keyword(s):  
Breast Cancer ◽  
Synthesis And Characterization ◽  
Anticancer Activities ◽  
1H And 13C Nmr ◽  
Chemical Structures ◽  
Ft Ir ◽  
Affinity Score ◽  
High Binding Affinity

The new series of 1-(4,5-dihydro-5-phenyl-3-diphenylpyrazol-1-yl)butan-1-one derivatives were synthesized by cyclization method using biphenyl chalcone with n-butyric acid and hydrazine hydrate. The synthesized 1-(4,5-dihydro-5-phenyl-3-diphenylpyrazol-1-yl)butan-1-one derivatives chemical structures were confirmed from spectral data such as FT-IR, 1H and 13C NMR. 2-Pyrazoline derivatives were docked with bacterial (1UAG) and breast cancer (1OQA) protein. Based on high binding affinity score, the best compound was subjected to in vitro anticancer activity by MTT assay. Also, antimicrobial activity were studied for synthesized 2-pyrazoline derivatives.

Synthesis and characterization of Au-Pd/NaTaO3 multilayer films for photocatalytic hydrogen production

2017 ◽  
Vol 332 ◽  
pp. 208-214 ◽  
Author(s):  
Jessica Rodríguez-Torres ◽  
Christian Gómez-Solís ◽  
Leticia M. Torres-Martínez ◽  
Isaías Juárez-Ramírez
Keyword(s):  
Hydrogen Production ◽  
Multilayer Films ◽  
Synthesis And Characterization ◽  
Photocatalytic Hydrogen Production

Preparation and Electrical Characterization of Poly(Aniline) NanoClay Composites

2015 ◽  
Vol 34 (4) ◽  
Author(s):  
Esma Ahlatcioǧlu ◽  
Bahire Filiz şenkal ◽  
Mustafa Okutan
Keyword(s):  
Electrical Characterization ◽  
Synthesis And Characterization ◽  
X Ray Diffraction ◽  
Inorganic Hybrid ◽  
X Ray ◽  
Ft Ir ◽  
Doped Polyaniline ◽  
Poly Aniline ◽  
Scanning Electron

AbstractIn this work, synthesis and characterization of composite materials based on NanoClay(NC) and boric acid doped PolyAniline (PANI) is studied. PANI was successfully incorporated into NC to form PANI-NC composites. The resulting organic-inorganic hybrid material, PANI-NC was characterized by various physicochemical techniques. Formation of PANI inside the clay tactoid has been confirmed by X-ray diffraction studies (XRD), scanning electron microscope (SEM) and FT-IR. Also, conductivity and physical properties of the PANI-NC composites were investigated.

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