Structure of the Cu(Salen) molecule Cuo2N2C16H14 according to gas-phase electron diffraction data and quantum chemical calculations

Giricheva, N. I.; Girichev, G. V.; Kuzmina, Natalia; Medvedeva, Yu. S.; Rogachev, Andrey Yu.

doi:10.1007/s10947-009-0007-1

Cited by 19 publications

(8 citation statements)

References 10 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…This is a relevant aspect, considering that, if these materials have semiconductor behavior, the electric transport is expected to increase with temperature, without any modification in the structural and chemical composition. 2-benzylidene-1-indanone metal complexes derivatives with oxovanadium can form compounds with strong metal-ligand covalent bonds, which enhance the molecular stability and support the sublimation process without dissociation [16]. There are few differences between powder materials and their deposition on films, and they may be due to internal stress produced during the vaporization process.…”

Section: Resultsmentioning

confidence: 99%

Synthesis and Evaluation of the Semiconductor Behavior in Vanadium Indanone Derivatives Thin Films

Lozano-González¹,

Sánchez-Vergara²,

Alvarado-Beltrán³

et al. 2017

AMPC

View full text Add to dashboard Cite

In this work, we propose a method to synthesize vanadium (IV) 2-benzyli-dene-1-indanone derivatives, used to prepare film structures by thermal evaporation. The complexes possess high melting point allowing the using of vacuum deposition methods. All the samples were grown at room temperature (25˚C) and low deposition rates (0.4 Å/s). The surface morphology and structure of the deposited films were studied by scanning electron microscopy (SEM) and spectroscopy dispersive energy (EDS). Optical absorption studies of the complex films were performed in the 200 -1100 nm wavelength range. The Tauc band gap (Eg) of the thin films was determined from the (αhν) 1/2 vs. hν plots for indirect transitions. The vanadium (IV) complex films show optical activation energies in the range of organic semiconductors. Multilayer nylon 11/vanadium indanone devices were fabricated using ITO and silver electrodes. The d.c. electrical properties of the device were also investigated. It was found that the temperature-dependent electric current in the structure showed a semiconductor behavior. At lower voltages below 7 V, the current density in the forward direction was found to obey an ohmic I-V relationship; for higher voltages above 7 V, the conduction was dominated by a space-charge-limited (SCLC) mechanism. The electrical activation energies (Ea) of the complexes were in the 2.17 -2.31 eV range.

show abstract

Section: Resultsmentioning

confidence: 99%

Synthesis and Evaluation of the Semiconductor Behavior in Vanadium Indanone Derivatives Thin Films

Lozano-González¹,

Sánchez-Vergara²,

Alvarado-Beltrán³

et al. 2017

AMPC

View full text Add to dashboard Cite

show abstract

“…From the earlier studies, it can be seen that there are different reports regarding the coordination geometry of the copper center in Cu(salen) or Cu(salophen) complexes. In the present work, we have attempted to study the geometry around Cu centers using the technique of XAFS.…”

Section: Introductionmentioning

confidence: 99%

XAFS investigations of copper(II) complexes with tetradentate Schiff base ligands

et al. 2012

View full text Add to dashboard Cite

X‐ray absorption fine structure spectra have been investigated at the K‐edge of copper in copper(II) salen/salophen complexes: [Cu(salen)] (1), [Cu(salen)CuCl2].H2O (2), [Cu(salophen)] (3) and [Cu(salophen) CuCl2].H2O (4), where salen2− = N,N′‐ethylenebis (salicylidenaminato); salophen2− = o‐phenylenediaminebis(salicylidenaminato). Complexes 1 and 3 are supposed to have one type of copper centers (called (Cu1)) and complexes 2 and 4 two types of copper centers (called (Cu1) and (Cu2)) having different coordination environments and geometries. A theoretical model has been generated using the available crystallographic data of complex 1 and it has been used for analysis of the extended X‐ray absorption fine structure (EXAFS) data of the four complexes to obtain the structural parameters for (Cu1) center. For this center, the obtained Cu–Cu distance (3.2 Å) verifies the binuclear nature of all the complexes. For determining the coordination geometry around (Cu2) center in 2 and 4, a theoretical model has been generated using the crystal structure of a Cu(II) complex, [Cu(C16H12N2O2Cl2)]. This theoretical model has been fitted to the EXAFS data of 2 and 4 to obtain the structural parameters for (Cu2) center. The present analysis shows that (Cu1) center has square pyramidal geometry involving 2N and 3O donor atoms, whereas (Cu2) center has distorted tetrahedral geometry with 2O and 2Cl donor atoms. The values of the chemical shifts and presence of typical Cu(II) X‐ray absorption near‐edge spectroscopy features suggest that copper is in the +2 oxidation state in all these complexes. The intensity of ls → 3d pre‐edge feature has been used to investigate the geometry and binuclear nature of the complexes. Copyright © 2012 John Wiley & Sons, Ltd.

show abstract

“…1). 12,13 Salen-Cu catalysed N-arylation reactions Initially, the catalytic activity of the complexes 1-3 were evaluated by coupling 4-iodotoluene with 1H-pyrazole as a model reaction in the presence of NaOH at 100 °C for 12 h in DMSO. As expected, the three Salen-Cu complexes all exhibited good catalytic activity for this reaction, and gave the desired product in 77-95% isolated yields (Table 1, entries 1-3).…”

Section: Resultsmentioning

confidence: 99%

Salen–Cu(II) Complex Catalysed N-Arylation of Pyrazole under Mild Conditions

Liu

Zhang

et al. 2013

Journal of Chemical Research

View full text Add to dashboard Cite

Three inexpensive and air-/moisture-stable complexes (Salden)Cu (Salden = N, N′-bis(salicylidene)-1,2-dimethylethylenediamine), (Saldch)Cu (Saldch = N, N′-bis(salicylidene)-1,2-cyclohexenediamine), and (Salph)Cu (salph = N, N′-bis(salicylidene)-1,2phenylenediamine) were synthesised and evaluated as catalysts for the N-arylation of pyrazole with aryl halides. A variety of aryl iodides and bromides underwent coupling with pyrazole, promoted by the (Saldch)Cu complex, in moderate to excellent yields without the protection by an inert gas.

show abstract

Structure of the Cu(Salen) molecule Cuo2N2C16H14 according to gas-phase electron diffraction data and quantum chemical calculations

Cited by 19 publications

References 10 publications

Synthesis and Evaluation of the Semiconductor Behavior in Vanadium Indanone Derivatives Thin Films

Synthesis and Evaluation of the Semiconductor Behavior in Vanadium Indanone Derivatives Thin Films

XAFS investigations of copper(II) complexes with tetradentate Schiff base ligands

Salen–Cu(II) Complex Catalysed N-Arylation of Pyrazole under Mild Conditions

Contact Info

Product

Resources

About