The Positive Muon as a Probe in Free Radical Chemistry

The Positive Muon as a Probe in Free Radical Chemistry

The work presented here is a result of an extended collaboration with a number of coworkers and guests.

Author: Emil Roduner

Publisher: Springer Science & Business Media

ISBN: 9783642517204

Category: Science

Page: 104

View: 272

The work presented here is a result of an extended collaboration with a number of coworkers and guests. Particularly, I would like to thank Dr. P. Burkhard and Dr. W. Strub for their careful work performed for their Ph. D. thesis and Dr. M. Heming for his brilliant ideas and his dedication. Very fruitful and stimulating were collaborations with our guests, i. e. with G. A. Brinkman and P. W. F. Louwrier from NIKHEF-K in Amsterdam, B. C. Webster, M. J. Ramos and D. McKenna from the University of Glasgow, M. C. R. Symons, D. Geeson and C. J. Rhodes from the University of Leicester, S. F. J. Cox and C. A. Scott from the Rutherford Appleton Laboratory in Chilton, and R. De Renzi and M. Ricco from the University of Parma. Many invaluable discussions with friends and competitors in the field helped to address new viewpoints and to define new goals. I shall not forget my teacher and director of the radical chemistry group, Prof. H. Fischer, whom I wish to thank for his interest and active support and for the great liberty he allowed me for the planning and organization of the project. Last but not least, I thank my dear wife Hanny and our children Christian, Martin and Andrea who suffered, without complaint, daddy's absence for so many hours.
Categories: Science

Muon Science

Muon Science

Radical frequencies of the Mu adducts to toluene in the ortho (o), meta (m), and para (p) positions to the methyl substituent. ... Roduner E., 1988, The Positive Muon as a Probe in Free Radical Chemistry (Lecture Notes in Chemistry 49, ...

Author: S.L Lee

Publisher: Routledge

ISBN: 9781351429467

Category: Science

Page: 496

View: 277

Muon science is rapidly assuming a central role in scientific and technological studies of the solid state within the disciplines of physics, chemistry, and materials science. Muon Science: Muons in Physics, Chemistry and Materials presents key developments in both theoretical and experimental aspects of muon spin relaxation, rotation, and resonance. Assuming no prior expertise in muon science, the book guides readers from introductory material to the latest developments in the field. The internationally renowned expert contributors cover topics in muon instrumentation and muon science applications that include muon production, beamlines and instrumentation, muonium chemistry, muon catalyzed fusion, fundamental muon physics, ultra-cold muons, magnetism, superconductivity, diffusion, semiconductors, simulations, and data analysis. The book maintains consistent notation and nomenclature throughout as well as cross-referencing and continuity between the contributions. It provides an excellent introduction to both new and experienced muon beam scientists and graduate students wishing to develop their knowledge and understanding of the subject.
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Organic Free Radicals

Organic Free Radicals

Springer-Verlag Berlin Heidelberg New York London Paris Tokyo Hong Kong E. Roduner The Positive Muon as a Probe in Free Radical Chemistry Potential and Limitations of the u SR Techniques 1988.8 figures, 7 tables. VII, 104 pages.

Author: Hanns Fischer

Publisher: Springer Science & Business Media

ISBN: 9783642739637

Category: Science

Page: 251

View: 939

Categories: Science

EPR of Free Radicals in Solids II

EPR of Free Radicals in Solids II

The positively charged surfactants (Scheme 7.1) CAT10 and CAT16 were adsorbed preferentially by anthophyllite fibres. Amosite fibres showed poor adsorption, ... Roduner E (1988) The positive muon as a probe in free radical chemistry.

Author: Anders Lund

Publisher: Springer Science & Business Media

ISBN: 9789400748873

Category: Science

Page: 390

View: 140

EPR of Free Radicals in Solids: Trends in Methods and Applications, 2nd ed. presents a critical two volume review of the methods and applications of EPR (ESR) for the study of free radical processes in solids. Emphasis is on the progress made in the developments in EPR technology, in the application of sophisticated matrix isolation techniques and in the advancement in quantitative EPR that have occurred since the 1st edition was published. Improvements have been made also at theoretical level, with the development of methods based on first principles and their application to the calculation of magnetic properties as well as in spectral simulations. EPR of Free Radicals in Solids II focuses on the trends in applications of experimental and theoretical methods to extract structural and dynamical properties of radicals and spin probes in solid matrices by continuous wave (CW) and pulsed techniques in nine chapters written by experts in the field. It examines the studies involving radiation- and photo-induced inorganic and organic radicals in inert matrices, the high-spin molecules and metal-based molecular clusters as well as the radical pro-cesses in photosynthesis. Recent advancements in environmental applications in-cluding measurements by myon resonance of radicals on surfaces and by quantitative EPR in dosimetry are outlined and the applications of optical detection in material research with much increased sensitivity reviewed. The potential use of EPR in quantum computing is considered in a newly written chapter. This new edition is aimed to experimentalists and theoreticians in research involving free radicals, as well as for students of advanced courses in physical chemis-try, chemical physics, materials science, biophysics, biochemistry and related fields.
Categories: Science

EPR of Free Radicals in Solids

EPR of Free Radicals in Solids

E. Roduner, The Positive Muon as a Probe in Free Radical Chemistry. Lecture Notes in Chemistry. Springer, Heidelberg, 1988. 7. A. Carrington and A.D. McLachlan, Introduction to Magnetic Resonance. Chapman and Hall, London, 1979. 8.

Author: Anders Lund

Publisher: Springer Science & Business Media

ISBN: 9781475751666

Category: Science

Page: 645

View: 711

EPR of Free Radicals in Solids: Trends in Methods and Applications presents methods and applications of modern EPR for the study of free radical processes in solids, which so far are only available in the journal literature. The first part of the book, covering trends in methods, contains experimentally oriented chapters on continuous wave and pulsed EPR techniques and special methods involving muon magnetic resonance and optical detection and theory for dynamic studies. New simulation schemes, including the influence of dynamics, are presented as well as advances in the calculation of hyperfine and electronic g-tensors. The second part of the book presents applications involving studies of radiation and photo-induced inorganic and organic radicals in inert matrices, including novel results of quantum effects in small radicals. High-spin molecules and complexes are also considered as well as radical processes in photosynthesis. Recent advances in EPR dosimetry are summarized.
Categories: Science

Charged Particle and Photon Interactions with Matter

Charged Particle and Photon Interactions with Matter

The Positive Muon as a Probe in Free Radical Chemistry, Lecture Notes in Chemistry. Vol. 49. Heidelberg, Germany: Springer. Roduner, E. 1993. Polarized positive muons probing free-radicals—A variant of magnetic-resonance. Chem. Soc.

Author: Yoshihiko Hatano

Publisher: CRC Press

ISBN: 1439811806

Category: Science

Page: 1064

View: 609

Building on Mozumder’s and Hatano’s Charged Particle and Photon Interactions with Matter: Chemical, Physicochemical, and Biological Consequences with Applications (CRC Press, 2004), Charged Particle and Photon Interactions with Matter: Recent Advances, Applications, and Interfaces expands upon the scientific contents of the previous volume by covering state-of-the-art advances, novel applications, and future perspectives. It focuses on relatively direct applications used mainly in radiation research fields as well as the interface between radiation research and other fields. The book first explores the latest studies on primary processes (the physical stage), particularly on the energy deposition spectra and oscillator strength distributions of molecules interacting with charged particles and photons. Other studies discussed include the use of synchrotron radiation in W-value studies and the progress achieved with positrons and muons interacting with matter. It then introduces new theoretical studies on the physicochemical and chemical stages that describe the behavior of electrons in liquid hydrocarbons and the high-LET radiolysis of liquid water. The book also presents new experimental research on the physicochemical and chemical stages with specific characteristics of matter or specific experimental conditions, before covering new experimental studies on the biological stage. The last set of chapters focuses on applications in health physics and cancer therapy, applications to polymers, the applications and interface formation in space science and technology, and applications for the research and development of radiation detectors, environmental conservation, plant breeding, and nuclear engineering. Edited by preeminent scientists and with contributions from an esteemed group of international experts, this volume advances the field by offering greater insight into how charged particles and photons interact with matter. Bringing together topics across a spectrum of scientific and technological areas, it provides clear explanations of the dynamic processes involved in and applications of interface formation.
Categories: Science

Physics and Chemistry of Finite Systems From Clusters to Crystals

Physics and Chemistry of Finite Systems  From Clusters to Crystals

Finally, the "vacuum" Mu may be used as a probe of chemical reactions on both molecular and granular surfaces,(10,11) leading to an ... E. Roduner, Lecture Notes in Chemistry 49: The Positive Muon as a Probe in Free Radical Chemistry ...

Author: Peru Jena

Publisher: Springer Science & Business Media

ISBN: 9789401726450

Category: Science

Page: 1436

View: 983

Recent innovations in experimental techniques such as molecular and cluster beam epitaxy, supersonic jet expansion, matrix isolation and chemical synthesis are increasingly enabling researchers to produce materials by design and with atomic dimension. These materials constrained by sire, shape, and symmetry range from clusters containing as few as two atoms to nanoscale materials consisting of thousands of atoms. They possess unique structuraI, electronic, magnetic and optical properties that depend strongly on their size and geometry. The availability of these materials raises many fundamental questions as weIl as technological possibilities. From the academic viewpoint, the most pertinent question concerns the evolution of the atomic and electronic structure of the system as it grows from micro clusters to crystals. At what stage, for example, does the cluster look as if it is a fragment of the corresponding crystal. How do electrons forming bonds in micro-clusters transform to bands in solids? How do the size dependent properties change from discrete quantum conditions, as in clusters, to boundary constrained bulk conditions, as in nanoscale materials, to bulk conditions insensitive to boundaries? How do the criteria of classification have to be changed as one goes from one size domain to another? Potential for high technological applications also seem to be endless. Clusters of otherwise non-magnetic materials exhibit magnetic behavior when constrained by size, shape, and dimension. NanoscaIe metal particles exhibit non-linear opticaI properties and increased mechanical strength. SimiIarly, materials made from nanoscale ceramic particIes possess plastic behavior.
Categories: Science

Radicals on Surfaces

Radicals on Surfaces

The main advantage of the uSR techniques is their sensitivity which allows detection of radicals under extremely low concentrations and in non-transparent and ... E. Roduner: The Positive Muon as a Probe in Free Radical Chemistry.

Author: A. Lund

Publisher: Springer Science & Business Media

ISBN: 9789401104937

Category: Science

Page: 318

View: 784

Studies of free radicals on surfaces are of interest for several reasons: the spontaneous or stimulated formation of radicals from adsorbed molecules may represent one possible mechanism for heterogeneous catalysis. In some cases the radicals are ionic, indicating that primary oxidation and reduction reactions occur. Radicals can also be used as probes to investigate diffusion processes on catalytic surfaces. The first direct observations were made more than 30 years ago, but detailed studies of structure, reactions and mobility have only recently become feasible with the advent of powerful spectroscopic techniques, to a great extent developed and used by the contributors to this volume. This comprehensive review describes new trends in the field. Leading experts write about the nature of surface active sites, methods to identify them, and the radicals formed from adsorbed molecules interacting with the surface. The emphasis is on the fundamentals covering thermal, photostimulated and radiation induced reactions as well as diffusion processes. This provides the necessary background for technological applications. This book will be useful to those who are interested in surface chemistry, heterogeneous catalysis as well as those who want to study reactive intermediates in chemical reactions. It is also of interest to scientists in photo and radiation physics and chemistry.
Categories: Science

Muon Spin Rotation Relaxation and Resonance

Muon Spin Rotation  Relaxation  and Resonance

Roduner E. (1988) The positive Muon as a Probe in Free Radical Chemistry, Lecture Notes in Chemistry, vol. 49 (Springer, Berlin). Roduner E. (1999) in Muon Science: Muons in Physics, Chemistry, and Materials, edited by Lee S.L., ...

Author: Alain Yaouanc

Publisher: Oxford University Press

ISBN: 9780199596478

Category: Science

Page: 486

View: 970

Intended for graduate students and researchers who plan to use the muon spin rotation and relaxation techniques. A comprehensive discussion of the information extracted from measurements on magnetic and superconductor materials. The muonium centres as well as the muon and muonium diffusion in materials are discussed.
Categories: Science

Radiation Chemistry

Radiation Chemistry

E. Roduner, The Positive Muon as a Probe in Free Radical Chemistry. Potential and Limitation of the HSR Techniques. Lecture Notes in Chemistry, Vol. 49, Springer, Heidelberg, 1988. 13. A. Mozumder, in Advcances in Radiation Chemistry, ...

Author: C.D. Jonah

Publisher: Elsevier

ISBN: 008054021X

Category: Science

Page: 776

View: 152

During the twentieth century, radiation chemistry emerged as a multi-faceted field encompassing all areas of science. Radiation chemical techniques are becoming increasingly popular and are being routinely used not only by chemists but also by biologists, polymer scientists, etc. "Radiation Chemistry: Present Status and Future Trends" presents an overall view of the different aspects of the subject. The chapters review the current status of the field and present the future opportunities in utilizing radiation chemical techniques. This will be of interest to chemists in general and in particular to radiation chemists, chemical kineticists, photochemists, physical-organic chemists and spectroscopists. In view of the diverse nature of the field, the book is a multi-authored effort by several experts in their particular areas of research. Six main areas, both basic and applied, were identified and the book is organized around them. The topics were selected in terms of their relative importance and the contribution of radiation chemistry to the general areas of chemistry, biology and physics. The topics covered are as diverse as gas phase radiation chemistry, the use of radiation chemical techniques, the treatment of water pollutants, the chemical basis of radiation biology, and muonium chemistry. The book also contains an update of the next generation electron accelerators.
Categories: Science