scholarly journals Synthesis and characterization of the cyanobenzene-ethylenedithio-TTF donor

2015 ◽  
Vol 11 ◽  
pp. 951-956 ◽  
Author(s):  
Sandrina Oliveira ◽  
Dulce Belo ◽  
Isabel Cordeiro Santos ◽  
Sandra Rabaça ◽  
Manuel Almeida
Keyword(s):  
Coupling Reaction ◽  
Cross Coupling ◽  
Triethyl Phosphite ◽  
High Yield ◽  
Synthesis And Characterization ◽  
X Ray Diffraction ◽  
X Ray ◽  
Cross Coupling Reaction ◽  
Uv Visible

A dissymmetric TTF-type electron donor, cyanobenzene-ethylenedithio-tetrathiafulvalene (CNB-EDT-TTF), was obtained in high yield, by a cross-coupling reaction with triethyl phosphite between 2-thioxobenzo[d][1,3]dithiole-5-carbonitrile and 5,6-dihydro-[1,3]dithiolo[4,5-b][1,4]dithiin-2-one. This new donor was characterized namely by single crystal X-ray diffraction, cyclic voltammetry, NMR, UV-visible and IR spectroscopy.

Synthesis and Electrochemistry of Aluminum Porphycenes: Crystal and Molecular Structure of Methyl-σ-Bonded Aluminum Etioporphycene

1997 ◽  
Vol 01 (02) ◽  
pp. 109-119 ◽  
Author(s):  
ROGER GUILARD ◽  
VIRGINIE PICHON-PESME ◽  
HASSANE LACHEKAR ◽  
CLAUDE LECOMTE ◽  
ALLY M. AUKAULOO ◽  
...  
Keyword(s):  
Molecular Structure ◽  
Crystal And Molecular Structure ◽  
Structural Data ◽  
Synthesis And Characterization ◽  
X Ray Diffraction ◽  
X Ray ◽  
H Nmr ◽  
Axial Ligands ◽  
Uv Visible

The synthesis and characterization of three monomeric aluminum porphycenes with anionic or σ-bonded axial ligands is reported. The investigated compounds are represented as ( EtioPc ) Al ( CH 3) and ( EtioPc ) AlX where EtioPc represents the dianion of etioporphycene and X = Cl − or OH −. Each synthesized complex was characterized by mass spectrometry. 1 H NMR, IR and UV-visible spectroscopies as well as by electrochemistry. Comparisons are made between the properties of complexes in the aluminum etioporphycene series and related chloro- or methyl σ-bonded Al ( III ) porphyrins containing octaethylporphyrin ( OEP ) or tetraphenylporphyrin ( TPP ) macrocycles. Comparisons are also made between the currently investigated compounds and a previously reported Al ( III ) μ-oxo dimer, [( EtioPc ) Al ]2 O . In addition, the crystal and molecular structure of ( EtioPc ) Al ( CH 3) was determined by X-ray diffraction. The molecular structure of this methyl-σ-bonded aluminum etioporphycene provides the first structural data for an aluminum porphycene compound. The aluminum(III) atom in ( EtioPc ) Al ( CH 3) is pentacoordinated and is located 0.54 Å from the plane of the four N -nitrogens.

Microwave-Hydrothermal Synthesis and Characterization of Graphene

2012 ◽  
Vol 602-604 ◽  
pp. 917-920 ◽  
Author(s):  
Zhen Hui Xiao ◽  
Shui Sheng Wu ◽  
Yan Lin Sun ◽  
Yu Lin Zhao ◽  
Ya Ming Wang
Keyword(s):  
Chemical Reduction ◽  
Visible Spectrum ◽  
Synthesis And Characterization ◽  
X Ray Diffraction ◽  
X Ray ◽  
Microwave Hydrothermal ◽  
Ft Ir ◽  
Uv Visible ◽  
Scanning Electron

Graphene was synthesized by microwave-hydrothermal chemical reduction of graphite oxide using hydrazine hydrate as the reducing agent. Graphene was characterized using X-ray diffraction, UV-visible spectrum, FT-IR spectrum and scanning electron microscopy. Results indicated that the as-prepared graphene was wrinkled and comprised fewer graphenes with a highly crystalline structure.

scholarly journals Synthesis and Study of Chemical, Thermal, Mesomorphic, and Optical Properties of Terphenyls Modified with Nitrile Groups

2017 ◽  
Vol 2017 ◽  
pp. 1-9 ◽  
Author(s):  
M. L. Mota González ◽  
A. Carrillo Castillo ◽  
R. C. Ambrosio Lázaro ◽  
J. Flores Méndez ◽  
Mario Moreno ◽  
...  
Keyword(s):  
Optical Properties ◽  
Coupling Reaction ◽  
Cross Coupling ◽  
Photoluminescence Properties ◽  
X Ray Diffraction ◽  
Scanning Calorimetry ◽  
X Ray ◽  
H Nmr ◽  
Cross Coupling Reaction ◽  
Vis Spectroscopy

We report the synthesis, characterization, and the thermotropic and photoluminescence properties of dialkoxyterphenyls with (T12-CN and T12-2CN) and without (T12) nitrile groups. These terphenyls were prepared through the Suzuki-Miyaura cross-coupling reaction using a palladium-based catalyst. The products obtained were analyzed as powders or after being drop-casted or spin-coated on glass. Nuclear Magnetic Resonance (1H NMR) and Fourier Transform Infrared (FTIR) spectroscopy techniques confirmed the structure and purity of the synthesized terphenyls. The mesomorphic behavior was studied by differential scanning calorimetry (DSC), polarizing optical microscopy (POM), and X-ray diffraction (XRD). T12 developed various mesophases, whereas T12-CN and T12-2CN displayed one single mesophase of low order over a wide temperature range. The films topology was studied by AFM and the optical properties were determined by ultraviolet-visible (UV-Vis) spectroscopy and spectrofluorometry. Higher roughness was found for the films prepared with the asymmetric terphenyl (T12-CN). The photoluminescence (PL) spectrum obtained for the asymmetric terphenyl (T12-CN) exhibited the expected characteristics with an emission band centered at 381 nm and an overtone around 760 nm.

Synthesis and characterization of trinuclear N-heterocyclic carbene–palladium(ii) complexes and their applications in the Suzuki–Miyaura cross-coupling reaction

RSC Advances ◽  
2016 ◽  
Vol 6 (103) ◽  
pp. 100690-100695 ◽  
Author(s):  
Tao Wang ◽  
Lantao Liu ◽  
Kai Xu ◽  
Huanping Xie ◽  
Hui Shen ◽  
...  
Keyword(s):  
Coupling Reaction ◽  
Cross Coupling ◽  
Synthesis And Characterization ◽  
Effective Catalyst ◽  
Cross Coupling Reaction ◽  
One Step

Five novel trinuclear N-heterocyclic carbene–palladium(ii) complexes 5a–e were conveniently synthesized in one step. The obtained palladium(ii) complexes were the effective catalyst precursors for the Suzuki–Miyaura coupling.

Synthesis and Characterization of SnSe Nanowires by Solvothermal Method

2015 ◽  
Vol 713-715 ◽  
pp. 2924-2927 ◽  
Author(s):  
Jian Li ◽  
Long Yan ◽  
Hui Jin Liu
Keyword(s):  
Thin Film ◽  
Band Gap ◽  
Solvothermal Method ◽  
Thin Film Solar Cells ◽  
Synthesis And Characterization ◽  
X Ray Diffraction ◽  
X Ray ◽  
Structure Morphology ◽  
Uv Visible

A simple solvothermal route has been used to prepare SnSe nanowires using SnCl4·4H2O and Selenium powder. The phase, structure, morphology, and optical properties of the as-synthesized products were characterized by powder X-ray diffraction (XRD), scan electron microscopy (SEM), Raman spectroscope (RS) and UV-visible spectrophotometer (UV-vis). The results showed that SnSe nanowires were prepared at 200°C for 24 h and in the length of 150-200μm, and width of 1-1.5μm. The band gap of SnSe nanowires was about 1.67 eV, which was close to the optimum band gap of thin film solar cells.

scholarly journals Synthesis and characterization of erbium trioxide nanoparticles as photocatalyzers for degradation of methyl orange dye

2019 ◽  
Vol 12 (1) ◽  
pp. 15-21 ◽  
Author(s):  
Rifat Mohammed Dakhil ◽  
Tayser Sumer Gaaz ◽  
Ahmed Al-Amiery ◽  
Mohd S. Takriff ◽  
Abdul Amir H. Kadhum
Keyword(s):  
Methyl Orange ◽  
Synthesis And Characterization ◽  
X Ray Diffraction ◽  
Visible Spectroscopy ◽  
X Ray ◽  
Uv Visible ◽  
Methyl Orange Dye ◽  
Microscopy Techniques ◽  
Degradation Of Methyl Orange

Abstract. The present work focuses on the photocatalytic degradation of methyl orange (MO) on erbium trioxide nanoparticles (Er2O3 NPs). In this study, Er2O3 nanoparticles were synthesized and fully characterized via various techniques, including X-ray diffraction, UV–visible spectroscopy and scanning electron microscopy techniques. The results revealed that the photocatalytic activity of the prepared Er2O3 NPs was manifested in MO photodegradation. The optimum efficiency obtained was 16 %.

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