One‐Electron Oxidation of Aryltriazenes to Radical Cations

Dunsch, Lothar; Gollas, Bernhard; Neudeck, Andreas; Petr, Andreas; Speiser, Bernd; Stahl, Hartmut

doi:10.1002/cber.19941271213

Cited by 20 publications

(7 citation statements)

References 24 publications

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“…It is interesting to note that both the abundance of the M + • ion and pED 50 values relate directly, via Equation (4), to the radical parameter E R 30 which is a measure of the ability of the substituent at the 4-position to stabilize, by delocalization, the radical cation M + • . The The direct relationship between the stability of radical ion M + • , and the ability of the 4-substituents to delocalize the radical, qualitatively agree with the data on the one-electron oxidation of aryltriazenes to radical cations; 31,32 this indicates that the stability of the triazene radical cations decreases with decreasing electron donating power of the para substituent. We may infer from Equations (1)-(5) that a predominantly antimetastatic compound should not be overly reactive to exert its action, i.e.…”

supporting

confidence: 80%

Correlation of the antimetastatic properties of aryltriazenes with their electron impact ionization mass spectrometry

Tarzia

Diamantini

Tontini

et al. 1997

Rapid Commun. Mass Spectrom.

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Howard Watson describes how Hawkins\Brown's new Biochemistry Department for the University of Oxford represents an innovative new model for scientific research institutes. Spatially, its interior not only positively embraces and encourages social interaction and the fertilisation of ideas, but also brings art, architecture and science together under a single roof. Copyright © 2009 John Wiley & Sons, Ltd.

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supporting

confidence: 80%

Correlation of the antimetastatic properties of aryltriazenes with their electron impact ionization mass spectrometry

Tarzia

Diamantini

Tontini

et al. 1997

Rapid Commun. Mass Spectrom.

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“…While the p-dimethylamino derivative is reversibly oxidized to a radical cation in a first step, 13 Cyclic voltammogram (a) and temporal development of UV/Vis spectra during potential scan (b) of 3-(p-ethoxyphenyl)-1,1-dimethyl-triazene (with kind permission of Wiley-VCH from Ref. [91]); further details see text and Ref. [91].…”

Section: Typical Voltammograms -Classical Applicationsmentioning

confidence: 99%

“…These have been detected by ESR spectroscopy [90][91]. A detailed picture of the follow-up reaction is derived from the temporal development of UV/Vis-spectra during CV: maxima A 1 and A 2 correspond to the starting triazene, while B 1 and B 2 are assigned to the transient radical cation.…”

Section: Typical Voltammograms -Classical Applicationsmentioning

confidence: 99%

Linear Sweep and Cyclic Voltammetry

Speiser

2003

Encyclopedia of Electrochemistry

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The sections in this article are Introduction Historical Background Potential Scan Voltammetries—Definitions Scope of the Chapter Theory of Potential Scan Voltammetries General Reversible Electron Transfer Kinetics of Electron Transfer Coupled Homogeneous Chemical Kinetics Adsorption and Surface‐Bound Redox Species Nonlinear Diffusion Restricted Diffusion Simulation Practical Considerations Electrodes and Cells Solvents and Supporting Electrolytes Experimental Limitations Artifacts and how to Avoid Them Present Methodological Developments Voltammetry at Ultramicroelectrodes Fast Scan Techniques Voltammetry without Supporting Electrolyte Voltammetry Under Hydrodynamic Conditions Voltammetric Spectroelectrochemistry Derivative Voltammetry Semiintegral (“Convolution”) and Semiderivative Voltammetry Applications Typical Voltammograms—Classical Applications Selected Recent Examples Conclusion Acknowledgments

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“…The electrodes are sandwiched between quartz rods coupled to the spectrometer using fiber optics [155]. Figure 13 shows the separated spectrum of the diazonium product from the oxidation of a triazene using a LIGA electrode [156].…”

Section: Semi-infinite Cells: Optically Transparent Electrodes (Otes)mentioning

confidence: 99%

Spectroelectrochemistry: In s itu UV ‐visible Spectroscopy

Crayston

2003

Encyclopedia of Electrochemistry

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The sections in this article are Introduction and Principles Introductory Remarks Theory and Techniques: Steady State Measurement Cell Transmission for a Simple Electron Transfer Reaction: Determination of E and n Effect of Follow‐up Reactions in OTTLE Cells Theory and Techniques: Kinetic Measurements Chronoabsorptometry Instrumentation for Chronoabsorptometry Slow Heterogeneous Kinetics Effect of Follow‐up Reactions Derivative Cyclic Voltabsorptometry ( DCVA ) Galvanostatic Conditions Adsorption Cell Geometries, Design, Techniques, and Instrumentation General Considerations Transmission under Thin‐layer Conditions: OTTLEs and Flow‐cells Variations on and Alternatives to the Basic OTTLE Design OTTLE Cells Intended for Both UV ‐visible and FTIR Use OTTLE Cell Electrochemical and Spectroscopic Response Semi‐infinite Cells: Optically Transparent Electrodes ( OTEs ) Reflection from Electrodes and Liquid–Liquid Interfaces Glancing Incidence Reflection, Near‐parallel or Parallel Reflection, and Diffraction Liquid–Liquid Interface and Attenuated Total Reflection Long Optical Path‐length Thin‐layer Cell ( LOPTLC ) Forced Convection, RDE and Channel Flow UV ‐vis Combined with Other Spectroscopic Techniques Applications Solution Studies of Inorganic Species Solution Studies of Organic Species Molten Salts Spectroelectrochemistry Studies of Species of Biological Interest Inorganic Thin Films and Modified Electrodes Conducting Polymers and Oligomer Models Conclusions

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One‐Electron Oxidation of Aryltriazenes to Radical Cations

Cited by 20 publications

References 24 publications

Correlation of the antimetastatic properties of aryltriazenes with their electron impact ionization mass spectrometry

Correlation of the antimetastatic properties of aryltriazenes with their electron impact ionization mass spectrometry

Linear Sweep and Cyclic Voltammetry

Spectroelectrochemistry: In s itu UV ‐visible Spectroscopy

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