tetrahedro-[Tetrakis {(1-methylimidazoline- 2(3H) -thionato) copper(I)}]: electrochemical synthesis, thermal analysis, cyclic voltammetry and crystal structure

Abstract[CoIII(salen)(DMF)2]+ X- salts [X = PF6, ClO4; salen = bis(salicyliden)ethylendiiminato; DMF = dimethylformamide] have been synthesized by electrochemical and chemical (air) oxidation of CoII(salen). Their monomeric structure with two DMF molecules in the axial positions in both the solid state and DMF solution is shown by X-ray crystal structure analysis, thermal analysis, mass spectroscopy, and 1H and 13C NMR spectroscopy. The electrochemical reduction of the [CoIII(salen)(DMF)2]+ cation is investigated by cyclic voltammetry and com pared to the oxidation of the neutral CoII(salen). The redox reaction connecting the cobalt(II) and the cobalt(III) species appears to be a quasi-reversible electron transfer. These properties make the [CoIII(salen)(DMF)2]+ X-salts starting materials for the analysis of the interaction of basic substrates with cobalt(III) species in the context of the biomimetic oxygenation reactions catalyzed by such complexes.

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Synthesis, crystal structure, luminescence, and photocatalytic properties of a 2D Cu(II) metal-organic frameworks based on 3,5-di(1H-benzimidazol-1-yl)pyridine and 4,4′-oxybis(benzoate) ligands

Zeitschrift für Naturforschung B ◽

10.1515/znb-2020-0041 ◽

2020 ◽

Vol 75 (8) ◽

pp. 727-732

Author(s):

Chen Zhang ◽

Jian-Qing Tao

Keyword(s):

Crystal Structure ◽

Thermal Analysis ◽

Uv Light ◽

Metal Organic Framework ◽

Metal Organic Frameworks ◽

X Ray Diffraction ◽

X Ray ◽

Uv Light Irradiation ◽

Photocatalytic Activities ◽

Metal Organic

AbstractA new Cu(II) metal-organic framework, [Cu(L)(OBA)·H2O]n (1) [H2OBA = 4,4′-oxybis(benzoic acid), L = 3,5-di(1H-benzimidazol-1-yl)pyridine] was hydrothermally synthesized and characterized through IR spectroscopy, elemental and thermal analysis and single-crystal X-ray diffraction. Complex 1 is a four-connected uni-nodal 2D net with a (44·62) topology which shows an emission centered at λ ∼393 nm upon excitation at λ = 245 nm. Moreover, complex 1 possesses high photocatalytic activities for the decomposition of Rhodamine B (RhB) under UV light irradiation.

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On tungstates of divalent cations (III) – Pb5O2[WO6]

Zeitschrift für Kristallographie - Crystalline Materials ◽

10.1515/zkri-2020-0041 ◽

2020 ◽

Vol 235 (8-9) ◽

pp. 311-317

Author(s):

Stephan G. Jantz ◽

Florian Pielnhofer ◽

Henning A. Höppe

Keyword(s):

Crystal Structure ◽

Thermal Analysis ◽

Quantum Chemical ◽

Density Functional ◽

Divalent Cations ◽

X Ray Diffraction ◽

Functional Theory ◽

X Ray ◽

First Results ◽

Electrostatic Calculations

Abstract${\text{Pb}}_{5}{\text{O}}_{2}\left[{\text{WO}}_{6}\right]$ was discovered as a frequently observed side phase during our investigation on lead tungstates. Its crystal structure was solved by single-crystal X-ray diffraction ($P{2}_{1}/n$, $a=7.4379\left(2\right)$ Å, $b=12.1115\left(4\right)$ Å, $c=10.6171\left(3\right)$ Å, $\beta =90.6847\left(8\right)$°, $Z=4$, ${R}_{\text{int}}=0.038$, ${R}_{1}=0.020$, $\omega {R}_{2}=0.029$, 4188 data, 128 param.) and is isotypic with ${\text{Pb}}_{5}{\text{O}}_{2}\left[{\text{Te}}_{6}\right]$. ${\text{Pb}}_{5}{\text{O}}_{2}\left[{\text{WO}}_{6}\right]$ comprises a layered structure built up by non-condensed [WO6]${}^{6-}$ octahedra and ${\left[{\text{O}}_{4}{\text{Pb}}_{10}\right]}^{12+}$ oligomers. The compound was characterised by spectroscopic measurements (Infrared (IR), Raman and Ultraviolet–visible (UV/Vis) spectra) as well as quantum chemical and electrostatic calculations (density functional theory (DFT), MAPLE) yielding a band gap of 2.9 eV fitting well with the optical one of 2.8 eV. An estimation of the refractive index based on the Gladstone-Dale relationship yielded $n\approx 2.31$. Furthermore first results of the thermal analysis are presented.

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A New Organic-Cation Cyclotetraphosphate C10H28N4P4O12·4H2O: Crystal Structure, Thermal Analysis, and Vibrational Spectra

Journal of Solid State Chemistry ◽

10.1006/jssc.2000.9007 ◽

2001 ◽

Vol 156 (2) ◽

pp. 364-369 ◽

Cited By ~ 17

Author(s):

E.H Soumhi ◽

I Saadoune ◽

A Driss

Keyword(s):

Crystal Structure ◽

Thermal Analysis ◽

Vibrational Spectra ◽

Organic Cation

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Synthesis, IR spectrum, thermal behaviour and crystal structure of a novel one-dimensional cyano-bridged zinc(II)/nickel(II) complex

Zeitschrift für Kristallographie - Crystalline Materials ◽

10.1524/zkri.220.1.74.58887 ◽

2005 ◽

Vol 220 (1) ◽

Cited By ~ 11

Author(s):

Ahmet Karadag ◽

Hümeyra Pasaoglu ◽

Gökhan Kastas ◽

Orhan Büyükgüngör

Keyword(s):

Crystal Structure ◽

Thermal Analysis ◽

Coordination Polymer ◽

Single Crystal ◽

Ir Spectrum ◽

Polymeric Chain ◽

X Ray Diffraction ◽

Bimetallic Complex ◽

One Dimensional ◽

X Ray

AbstractThe cyano-bridged heteronuclear coordination polymer of zinc(II)/nickel(II) has been prepared by N-(2-hydroxyethyl)-ethylendiamine (hydet-en), alternatively named 2-(2-aminoethylamino)-ethanol and characterised by IR and thermal analysis. In the bimetallic complex, the decomposition of hydet-en ligands is seen to be endothermic whereas that of the cyano ligands is found to be exothermic. The crystal structure of the complex has been determined by single-crystal X-ray diffraction. The crystal structure of the zinc(II)-nickel(II) complex consists of a one-dimensional polymeric chain –Zn(hydet-en)

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