ChemInform Abstract: Spectroscopic and Electrochemical Properties of Dimeric Ruthenium(II) Diimine Complexes and Determination of Their Excited State Redox Properties.

ChemInform ◽  
1987 ◽  
Vol 18 (36) ◽  
Author(s):  
Y. FUCHS ◽  
S. LOFTERS ◽  
T. DIETER ◽  
W. SHI ◽  
R. MORGAN ◽  
...  
Keyword(s):  
Excited State ◽  
Electrochemical Properties ◽  
Redox Properties ◽  
Diimine Complexes

Influence of Metal Core Composition on Redox Properties and Photoreactivity of the Clusters [H4-xRu4-xRhx(CO)12] (x = 0, 2, 3, 4)

2001 ◽  
Vol 66 (7) ◽  
pp. 1062-1077 ◽  
Author(s):  
Maarten J. Bakker ◽  
Tapani A. Pakkanen ◽  
František Hartl
Keyword(s):  
Electrochemical Properties ◽  
Electrochemical Reduction ◽  
Redox Properties ◽  
Metal Core ◽  
Loss Product ◽  
Condensation Reactions ◽  
Core Composition ◽  
Co Dissociation ◽  
Major Reduction

Electrochemical properties of tetrahedral clusters [H2Ru2Rh2(CO)12], [HRuRh3(CO)12] and [Rh4(CO)12] were investigated in order to evaluate the influence of metal core composition in the series [H4-xRu4-xRhx(CO)12] (x = 0-4). The cluster [H3Ru3Rh(CO)12] was not available in sufficient quantities. As reported for [H4Ru4(CO)12], electrochemical reduction of the hydride-containing clusters [H2Ru2Rh2(CO)12] and [HRuRh3(CO)12] also results in (stepwise) loss of hydrogen, producing the anions [HRu2Rh2(CO)12]-, [Ru2Rh2(CO)12]2- and [RuRh3(CO)12]-. These anions can also be prepared from the neutral parent clusters via chemical routes. Electrochemical reduction of [Rh4(CO)12] does not result in the formation of any stable tetranuclear anion. Instead, [Rh5(CO)15]- and [Rh6(CO)15]2- are the major reduction products detected in the course of IR spectroelectrochemical experiments. Most likely, these cluster species are formed from the secondary CO-loss product [Rh4(CO)11]2- by fast redox condensation reactions. Their reoxidation regenerates parent [Rh4(CO)12], together with some [Rh6(CO)16]. Unlike [H4Ru4(CO)12] that undergoes photochemical CO-dissociation, [H2Ru2Rh2(CO)12] and [Rh4(CO)12] are completely photostable in neat hexane and dichloromethane as well as in the presence of oct-1-ene.

Nanomolar Determination of Nitrofurans in Water via Excited-State Inter-Ligand Proton Transfer

2021 ◽  
pp. 338905
Author(s):  
Xiaojun Zhang ◽  
Lina Zhao ◽  
Xiaomeng Jin ◽  
Zijun Zhang ◽  
Yuxin Li
Keyword(s):  
Excited State ◽  
Proton Transfer

Synthesis, Characterization, Investigation of Capacitance and Redox Properties of Self-assembled Phe-Phe with Ferrocene Conjugates

2021 ◽  
Author(s):  
Om Shanker Tiwari
Keyword(s):  
Nucleic Acid ◽  
Electrochemical Properties ◽  
Self Assembly ◽  
Peptide Nucleic Acid ◽  
Redox Properties ◽  
Self Assembled ◽  
Acid Unit

The synthesis, nanostructure self-assembly and electrochemical properties of a series of ferrocene conjugated peptides derived from the dipeptide Phe-Phe, nucleoside and the peptide nucleic acid unit which are covalently attached...

Permanganate Based Chemiluminescence Analysis of Cefoperazon

2013 ◽  
Vol 333-335 ◽  
pp. 1807-1810
Author(s):  
De Yi Zhang ◽  
Li Wen Zheng
Keyword(s):  
Excited State ◽  
Standard Deviation ◽  
Potassium Permanganate ◽  
Injection Technique ◽  
Pharmaceutical Samples ◽  
Analysis Process ◽  
Relative Standard ◽  
Novel Method ◽  
Emitting Species

In this paper, a novel method fog determination of chemiluminescence (CL) spectra utilizing LS55 luminescence spectrophotometer was proposed. By this means, the CL spectra generated from the oxidation of cephalosporins with potassium permanganate was investigated. The result indicated that acid potassium permanganate CL system has more then three emitting species, excited state Mn(Ⅱ), Mn(Ⅲ) and singlet oxygen all could be assigned as the possible emitting species of this CL system. Base on above investigation results, sodium cefoperazone in pharmaceutical samples was determined by a CL analysis process combining with flow-injection technique. The detection limits estimated by a conservative model (3σ) of cefoperazone was 0.1µg dm-3, and the maximum relative standard deviation (RSD) was not more than 0.8 % (n=11, ρ=20µg dm-3).

Reaktionen von α-Ketoaziden mit N,N-Dimethylammo-nitrosobenzol Darstellung von α-Imino-β-ketonitrilen und deren Redoxeigenschaften / Reactions of α-Ketoazides with N,N-Dimethylamino-nitrosobenzol Synthesis of α-Imino-β-Ketonitriles and their Redox Properties

1983 ◽  
Vol 38 (8) ◽  
pp. 930-933 ◽  
Author(s):  
Dierk Knittel
Keyword(s):  
Electrochemical Properties ◽  
Redox Properties ◽  
Nitroso Compounds ◽  
Aromatic Nitroso Compounds

A survey about the reaction between α-azidoacetophenones with aromatic nitroso compounds is given. The synthesis of α-imino-β-ketonitriles and some electrochemical properties of this class are described.

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