Güncel Gönderiler: Fizik Bölümü
Toplam kayıt 1178, listelenen: 761-780
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N,N,N ',N '-Tetrakis(2-hydroxyethyl)ethylenediamine palladium(II) complex as efficient catalyst for the Suzuki/Miyaura reaction in water
(Pergamon-Elsevier Science LTD, 2010)A new water soluble palladium(II) complex (2) derived from N,N,N',N'-tetrakis(2-hydroxyethyl)ethylenediamine (edteH(4)) (1) was synthesized in high yield and characterized by (1)H, (13)C, HMQC and COSY NMR spectroscopy. ... -
A New Application Area for Ag-NHCs: CO2 Fixation Catalyst
(Wiley-V C H Verlag GMBH, 2012)The first example of the silver-NHC catalyzed cycloaddition of CO2 to terminal epoxides is reported. The choice of NHC substituents, halides and the nature of additives were determined to be important. Ionic [(Cnmim)2Ag]2[Ag2Br4] ... -
Mn(II) complexes with bipyridine, phenanthroline and benzoic acid: Biological and catalase-like activity
(Indian Acad Sciences, 2016)Five mononuclear Mn(II) complexes, [Mn(phen)(2)(ClO4)(2)] (1), [Mn(phen)(3)](ClO4)(2)(H2CO3)(2)(2), [Mn(bipy)(2)(ClO4)(2)] (3), [Mn(bipy)(3)](ClO4)(2)) (4), and Mn(phen)(2)(ba)(H2O)](ClO4)(CH3OH) (5), where bipy = ... -
Effective catalytic oxidation of alcohols and alkenes with monomeric versus dimeric manganese(II) catalysts and t-BuOOH
(Wiley, 2016)Two new Mn(II) complexes, [Mn(C6H5COO)(H2O)(phen)(2)](ClO4)(CH3OH) (1) and [Mn-2(-C6H5COO)(2)(bipy)(4)]2(ClO4) (2) (phen = 1,10-phenanthroline; bipy = 2,2-bipyridine), were synthesized and characterized using UV-visible ... -
Determination of Adsorption and Kinetic Parameters for Synthesis of Isobutyl Acetate Catalyzed by Amberlite IR-122
(Taylor & Francis Inc, 2009)In the present study, the kinetics of esterification of acetic acid with isobutanol was studied by using Amberlite IR-122 as an acid catalyst. Experiments were carried out in a stirred batch reactor in dioxane at different ... -
Dielectric behavior of the catalyst zeolite NaY
(Scientific Technical Research Council Turkey-Tubitak, 2007)Zeolites are crystalline hydrated aluminosilicates of alkaline and alkaline earth metals. The basic zeolite structure is an anionic frame of Si and Al T-atoms, which are tetrahedral and coordinated with oxygen atoms. The ... -
Infrared spectrum and STM images of cyclohexene-2-ethanamine: First principle investigation
(Elsevier Science BV, 2008)The vibrational properties of cyclohexene-2-ethanamine molecule are studied by both theoretically and experimentally. The theoretical calculations are performed using density functional perturbation theory (DFPT) based on ... -
Dielectric Properties of Isotactic Polypropylene and Montmorillonite Nanocomposites
(IEEE, 2010)Polymer nanocomposites typically consist of inorganic particles dispersed in a polymer matrix. Layered-silicate-based polymer nanocomposites have great potential as low-cost, highperformance materials with various engineering ... -
Electrical Properties of n-ZnO:La/p-Si Heterostructure Diode
(Amer Scientific Publishers, 2016)Lanthanum (La)-doped ZnO nanofilms were prepared by facile dip-coating method. The surface morphologies and crystallinity of the prepared films were examined by field emission scanning electron microscopy (FESEM) and X-ray ... -
Synthesized some 4-(2-thiazolylazo)resorcinol complexes: Characterization, thermal and optical properties
(Pergamon-Elsevier Science LTD, 2009)Some transition metal complexes of the type [ML2]center dot nH(2)O (n = 0 or 2) of the title ligand, 4-(2-thiazolylazo)resorcinol, HL (TAR) have been synthesized and characterized by various analytical and physicochemical ... -
Controlled growth of c-axis oriented ZnO nanorod array films by electrodeposition method and characterization
(Pergamon-Elsevier Science LTD, 2014)ZnO nanorod array films were deposited from aqueous solution containing different concentrations (1 x 10(-2) M and 5 x 10(-3) M) Zn(NO3)(2)center dot 6H(2)O and C6H12N4 and at different electrodeposition times (i.e., 15 ... -
Influence of Irradiation Time on Structural, Morphological Properties of ZnO-NRs Films Deposited by MW-CBD and Their Photodiode Applications
(Hindawi LTD, 2017)Microwave-assisted chemical bath deposition (MW-CBD) was used to deposit zinc oxide nanorods (ZnO-NRs) films by using different microwave irradiation time. The films exhibit a good crystallinity having a hexagonal wurtzite ... -
Structural, optical and electrical properties of F-doped ZnO nanorod semiconductor thin films deposited by sol-gel process
(Elsevier Science BV, 2008)Structural, optical and electrical properties of fluorine-doped ZnO nanostructure semiconductor thin films prepared by sol-gel spin coating method have been investigated. The thin films have polycrystalline structure with ... -
Photovoltaic solar cell properties of CdxZn1-xO films prepared by sol-gel method
(Pergamon-Elsevier Science LTD, 2009)CdxZn1-xO films have been deposited by sol-gel spin-coating method onto glass substrates. The Cd/Zn ratio in solution was changed from 0 to 1. Zinc acetate dehydrates, cadmium acetate dehydrates, 2-methoxyethanol and ... -
Fabrication of p-Si/n-ZnO:Al heterojunction diode and determination of electrical parameters
(Elsevier Science BV, 2018)We present a fundamental experimental study of a microwave assisted chemical bath deposition (MW-CBD) method for Al doped ZnO films. Field emission scanning electron microscopy (FESEM) and X-ray diffraction (XRD) spectroscopy ... -
Sn doping effects on the electro-optical properties of sol gel derived transparent ZnO films
(Elsevier Science BV, 2010)Undoped and tin (Sn) doped ZnO films have been deposited by sol gel spin coating method. The Sn/Zn nominal volume ratio was 1, 3 and 5% in the solution. The effect of Sn incorporation on structural and electro-optical ... -
Microstructure and electro-optical properties of sol-gel derived Cd-doped ZnO films
(Academic Press LTD- Elsevier Science LTD, 2010)The microstructure, and the electrical and optical properties of undoped zinc oxide (ZnO) and cadmium-doped ZnO (CZO) films deposited by a sol-gel method have been investigated. The films have a polycrystalline structure ... -
The role of pH and boron doping on the characteristics of sol gel derived ZnO films
(Elsevier Science Sa, 2011)Undoped and boron doped ZnO films (nominal volume B/Zn ratio = 1%, 3% and 5%) were deposited onto glass substrates by the sol gel method using spin coating technique. Zinc acetate dihydrate (ZnAc), 2-methoxyethanol and ... -
The effects of substrate temperature on refractive index dispersion and optical constants of CdZn(S0.8Se0.2)(2) alloy thin films
(Elsevier Science Sa, 2009)The effect of substrate temperature on optical properties of CdZn(S0.8Se0.2)(2) thin films deposited onto glass substrates by the spray pyrolysis method has been investigated. The average optical transmittance of the films ... -
Effect of Cu and In content in precursor solution on the structural and optical properties of CuInS2 in CH ordered nanostructured films
(Elsevier GMBH, 2016)CuInS2 nanostructured films were prepared by Ultrasonic spray pyrolysis (USP) method. Variation of structural and optical properties of the CuInS2 films including Cu and In in the precursor solution were investigated. The ...