scholarly journals A novel redox-active calix[4]arene-tetrathiafulvalene dyad

2011 ◽  
Vol 9 (6) ◽  
pp. 1102-1108 ◽  
Author(s):  
Bang-Tun Zhao ◽  
Xiao-Min Zhu ◽  
Qi-Ming Peng ◽  
Zhen-Ning Yan ◽  
Franck Derf ◽  
...  
Keyword(s):  
Cyclic Voltammetry ◽  
Diffraction Analysis ◽  
Electrochemical Properties ◽  
Absorption Spectra ◽  
X Ray Diffraction ◽  
X Ray ◽  
Redox Active ◽  
Cesium Fluoride

AbstractA novel redox-active calix[4]arene-TTF 5 was prepared by the reaction of p-tert-butylcalix[4]arene 4 with the tosylated TTF 3 in the presence of cesium fluoride. The structure of the dyad 5 was identified by X-ray diffraction analysis, and the preliminary electrochemical properties of 5 were investigated by cyclic voltammetry (CV), for which two reversible one-electron waves were observed. Moreover, the UV-vis absorption spectra studies show that the dyad 5 undergoes progressive oxidation at the TTF moiety in presence of increasing amounts of Cu2+ or Hg2+.

Bis/tris[octakis(hexylthio)phthalocyaninato] europium(III) complexes: structure, spectroscopic, and electrochemical properties

2013 ◽  
Vol 17 (08n09) ◽  
pp. 673-681 ◽  
Author(s):  
Chunhua Huang ◽  
Yi Zhang ◽  
Junshan Sun ◽  
Yongzhong Bian ◽  
Dennis P. Arnold
Keyword(s):  
Cyclic Voltammetry ◽  
Ir Spectroscopy ◽  
Diffraction Analysis ◽  
Electrochemical Properties ◽  
Electronic Absorption ◽  
Elemental Analysis ◽  
Molecular Structures ◽  
Spectroscopic Methods ◽  
X Ray Diffraction ◽  
X Ray

Bis/tris(phthalocyaninato) europium double- and triple-decker complexes Eu [ Pc (β- SC 6 H 13)8]2 (1) and Eu 2[ Pc (β- SC 6 H 13)8]3 (2) [ Pc (β- SC 6 H 13)8 = 2, 3, 9, 10, 16, 17, 23, 24-octakis(hexylthio)phthalocyaninate] have been synthesized and characterized by a series of spectroscopic methods including mass, NMR, electronic absorption and IR spectroscopy in addition to elemental analysis. Their molecular structures have been determined by single crystal X-ray diffraction analysis and electrochemical properties studied by cyclic voltammetry.

scholarly journals Complexes of Cobalt(II) Iodide with Pyridine and Redox Active 1,2-Bis(arylimino)acenaphthene: Synthesis, Structure, Electrochemical, and Single Ion Magnet Properties

Molecules ◽  
2020 ◽  
Vol 25 (9) ◽  
pp. 2054 ◽  
Author(s):  
Dmitriy S. Yambulatov ◽  
Stanislav A. Nikolaevskii ◽  
Mikhail A. Kiskin ◽  
Tatiana V. Magdesieva ◽  
Oleg A. Levitskiy ◽  
...  
Keyword(s):  
Magnetic Field ◽  
Cyclic Voltammetry ◽  
External Magnetic Field ◽  
Electrochemical Behavior ◽  
Complex I ◽  
Molecular Structures ◽  
X Ray Diffraction ◽  
X Ray ◽  
Redox Active ◽  
Tetrahedral Environment

Complexes [(dpp-BIAN)0CoIII2]·MeCN (I) and [(Py)2CoI2] (II) were synthesized by the reaction between cobalt(II) iodide and 1,2-bis(2,6-diisopropylphenylimino)acenaphthene (dpp-BIAN) or pyridine (Py), respectively. The molecular structures of the complexes were determined by X-ray diffraction. The Co(II) ions in both compounds are in a distorted tetrahedral environment (CoN2I2). The electrochemical behavior of complex I was studied by cyclic voltammetry. Magnetochemical measurements revealed that when an external magnetic field is applied, both compounds exhibit the properties of field-induced single ion magnets.

{2}Metallocryptands of Iron and Gallium: Synthesis, Structure, and Properties [1]

2009 ◽  
Vol 64 (4) ◽  
pp. 1-6 ◽  
Author(s):  
Rolf W. Saalfrank ◽  
Uwe Reimann ◽  
Andreas Scheurer ◽  
Frank Hampel ◽  
Cornelia Goebel ◽  
...  
Keyword(s):  
Cyclic Voltammetry ◽  
Nmr Spectroscopy ◽  
Diffraction Analysis ◽  
Mossbauer Spectroscopy ◽  
Structure And Properties ◽  
X Ray Diffraction ◽  
X Ray ◽  
Tetradentate Ligands ◽  
Dinuclear Iron ◽  
Triple Helicate

Starting from CH-acidic tetradentate ligands H2L (1) and triethylamine, the synthesis and characterisation of four dinuclear iron(III) and gallium(III) cryptands [M2(L)3] (3, 4) are reported. The structures of the ligand H2L (1a) and the triple helicate 3b were determined by X-ray diffraction analysis. The ferric complexes 3 were further characterised by Mössbauer spectroscopy and cyclic voltammetry. NMR spectroscopy proved the diamagnetic gallium(III) cryptands 4 to remain stable in solution for several days.

Macrocyclic dipyrrin dimer bridged by ethylene and dioxyphenylene linkers

2015 ◽  
Vol 19 (01-03) ◽  
pp. 135-139 ◽  
Author(s):  
Ji-Young Shin ◽  
Satoru Hiroto ◽  
Hiroshi Shinokubo
Keyword(s):  
Charge Transfer ◽  
Diffraction Analysis ◽  
Absorption Spectra ◽  
Intramolecular Charge Transfer ◽  
X Ray Diffraction ◽  
X Ray ◽  
Dependent Absorption

A tetrapyrrolic macrocycle containing ethenylene and dioxyphenylene bridges was obtained through the reaction of a dipyrrin-DDQ adduct with triethylamine. The structure of the macrocycle was elucidated by X-ray diffraction analysis. The macrocycle exhibited solvent-dependent absorption spectra due to intramolecular charge transfer interactions.

Ni-MnO2 Synthesized by One-Step Liquid Phase Coprecipitation as Promising Electrode Materials for Supercapacitor

2020 ◽  
Vol 999 ◽  
pp. 21-27 ◽  
Author(s):  
Yue Zhou ◽  
Qing Hao Yang ◽  
Jie Dong
Keyword(s):  
Cyclic Voltammetry ◽  
Liquid Phase ◽  
Electrochemical Properties ◽  
Electrode Materials ◽  
Electrochemical Impedance ◽  
X Ray Diffraction ◽  
X Ray ◽  
Structure Morphology ◽  
Persistence Rate ◽  
One Step

Nickel-doped manganese dioxide (Ni-MnO2) as electrode materials for supercapacitors were successfully prepared by one-step chemical liquid phase coprecipitation with the different nickel doped proportions. X-ray diffraction (XRD), scanning electron microscopy (SEM) and X-ray fluorescence (XRF) were used to analyze the micro-structure, morphology and composition. And electrochemical properties were studied by cyclic voltammetry (CV), galvanostatic charge-discharge (GCD) and electrochemical impedance spectrometry (EIS). The results revealed that MnO2 synthesized in this work turned out to be δ-MnO2 of homogeneous dispersion and excellent electrochemical properties. Specific capacitance of 300.85 F/g was achieved for the 2% Ni-doped MnO2 at 2mV/s through cyclic voltammetry, and after 5000 circles the persistence rate of which still remained to 75%, exhibiting a preeminent advantage of stability and reversibility to naked MnO2.

scholarly journals Fully Solvated, Monomeric Re(II) Complexes: Insights into the Chemistry of [Re(NCCH3)6]2+

2020 ◽  
Author(s):  
Robin Bolliger ◽  
Giuseppe Meola ◽  
Henrik Braband ◽  
Olivier Blacque ◽  
lukas siebenmann ◽  
...  
Keyword(s):  
Cyclic Voltammetry ◽  
Diffraction Analysis ◽  
Oxidation State ◽  
Oxidation States ◽  
X Ray Diffraction ◽  
Rhenium Complexes ◽  
X Ray ◽  
Arene Complex

<sup>The chemistry of rhenium complexes covers oxidation state +VII to -I. Some oxidation states such as +II are only rarely found in literature. One of the reasons is the lack of a suitable stable precursor for the oxidation state +II. However, we have developed a two step synthesis to the fully solvated Re(+II) complex [Re(NCCH</sup><sub>3</sub><sup>)</sup><sub>6</sub><sup>]</sup>2+<sup> from [ReO</sup><sub>4</sub><sup>]</sup>-<sup> via the rhenium bis-arene complex [Re(C</sup><sub>10</sub><sup>H</sup><sub>8</sub><sup>)</sup><sub>2</sub><sup>]</sup>+<sup>. This fully solvated Re(+II) was fully characterized by various spectroscopic manners, cyclic voltammetry, and X-Ray diffraction analysis. Its potential as a precursor for Re(+II) chemistry was explored with various substitutions reactions with phosphines and halides, and the obtained products were as well fully characterized.<br></sup>

Novel Doped Tungstovanadate and Molybdovanadate with Bi-antimony-Capped Keggin Structure

2011 ◽  
Vol 64 (2) ◽  
pp. 197 ◽  
Author(s):  
Zhangang Han ◽  
Jingjing Wu ◽  
Yuanzhe Gao ◽  
Xueliang Zhai
Keyword(s):  
Diffraction Analysis ◽  
Electrochemical Properties ◽  
Carbon Paste ◽  
X Ray Diffraction ◽  
One Dimensional ◽  
X Ray ◽  
Carbon Paste Electrodes ◽  
Keggin Type ◽  
Metal Ligand ◽  
Modified Carbon Paste Electrodes

Three novel V-centred Keggin-based compounds containing cap-shaped Sb atoms: (HDMF)2[(VO4)W5.65V7.74Sb2.61O36.77]·6H2O (1), [Co(phen)3]2[(VO4)Mo9.58V2.42Sb2O36]·6H2O (2) and [Ni(phen)2(H2O)]2[(VO4)Mo8V4Sb2O36]·2H2O (3) (DMF = dimethylformamide; phen = 1,10-phenanthroline) have been synthesized and characterized. X-ray diffraction analysis revealed that compound 1 consists of an unusually one-dimensional 12-tungstovanadate Keggin-based polymer, in which the reduced tungstovanadate Keggin species are stabilized by introducing capping {VO} and {Sb} groups and then linked into chains via V(Sb)–O–V(Sb) interactions. Both 2 and 3 are built from secondary metal–ligand groups (Co-phen for 2, Ni-phen for 3) and 12-molybdovanadate doped Keggin-type cores with two antimony atoms capping two opposite sites. The anion in 3 represents a bi-capped and bi-supported Keggin-type structure. The electrochemical properties of 2- and 3-modified carbon paste electrodes (2-CPE and 3-CPE) are also studied.

scholarly journals Fully Solvated, Monomeric Re(II) Complexes: Insights into the Chemistry of [Re(NCCH3)6]2+

2020 ◽  
Author(s):  
Robin Bolliger ◽  
Giuseppe Meola ◽  
Henrik Braband ◽  
Olivier Blacque ◽  
lukas siebenmann ◽  
...  
Keyword(s):  
Cyclic Voltammetry ◽  
Diffraction Analysis ◽  
Oxidation State ◽  
Oxidation States ◽  
X Ray Diffraction ◽  
Rhenium Complexes ◽  
X Ray ◽  
Arene Complex

<sup>The chemistry of rhenium complexes covers oxidation state +VII to -I. Some oxidation states such as +II are only rarely found in literature. One of the reasons is the lack of a suitable stable precursor for the oxidation state +II. However, we have developed a two step synthesis to the fully solvated Re(+II) complex [Re(NCCH</sup><sub>3</sub><sup>)</sup><sub>6</sub><sup>]</sup>2+<sup> from [ReO</sup><sub>4</sub><sup>]</sup>-<sup> via the rhenium bis-arene complex [Re(C</sup><sub>10</sub><sup>H</sup><sub>8</sub><sup>)</sup><sub>2</sub><sup>]</sup>+<sup>. This fully solvated Re(+II) was fully characterized by various spectroscopic manners, cyclic voltammetry, and X-Ray diffraction analysis. Its potential as a precursor for Re(+II) chemistry was explored with various substitutions reactions with phosphines and halides, and the obtained products were as well fully characterized.<br></sup>

Photophysical and electrochemical properties of a novel 4f–3d heterometallic porphyrin

2014 ◽  
Vol 18 (07) ◽  
pp. 600-603 ◽  
Author(s):  
Wen-Tong Chen ◽  
Ya-Ping Xu ◽  
Qiu-Yan Luo ◽  
Yan-Kang Dai ◽  
Shan-Lin Huang ◽  
...  
Keyword(s):  
Diffraction Analysis ◽  
Electrochemical Properties ◽  
Fluorescence Lifetime ◽  
Emission Band ◽  
Hydrothermal Reaction ◽  
Three Dimensional ◽  
Ultraviolet Region ◽  
X Ray Diffraction ◽  
X Ray ◽  
Open Framework

A 4f-3d heterometallic porphyrin, [ TbCo ( TPPS ) H 3 O ]n (1) ( H 2 TPPS = tetra (4- sulfonatophenyl ) porphyrin ), has been synthesized via a hydrothermal reaction and structurally characterized by single crystal X-ray diffraction analysis. The structure of 1 consists of [ TbCo ( TPPS ) H 3 O ]n molecules. The Tb 3+ ions are coordinated by eight oxygen atoms from eight sulfonic groups, yielding a distorted square anti-prism geometry. Compound 1 is characterized by a three-dimensional (3-D) porous open framework that is thermally stable up to 350°C. Compound 1 displays a fluorescent emission band in the ultraviolet region and its fluorescence lifetime is 1.14 ms. A slow scan CV curve of compound 1 reveals one reversible wave with E1/2 being equal to -0.78 V, which is close to the value -0.74 V of DPV diagram.

Cobalt(III) and gallium(III) complexes of meso-free corroles with distinct position-dependent substituent effects

2016 ◽  
Vol 20 (01n04) ◽  
pp. 274-281 ◽  
Author(s):  
Shota Ooi ◽  
Takayuki Tanaka ◽  
Atsuhiro Osuka
Keyword(s):  
Diffraction Analysis ◽  
Electrochemical Properties ◽  
Substituent Effects ◽  
X Ray Diffraction ◽  
X Ray

Co(III) and Ga(III) complexes of 5,10-bis(pentafluorophenyl)corrole and 5,15-bis(pentafluorophenyl)corrole were synthesized by metalations with Co(OAc)2 •4H2O and GaCl3, respectively. The structures of these complexes have been all unambiguously revealed by X-ray diffraction analysis. Their optical and electrochemical properties have been studied, which reveals small but distinctly different substituent effects depending upon the substitution positions.

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