Book ChapterDOI
Magnetic Field and Magnetic Isotope Effects on the Products of Organic Reactions
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In this paper, the authors focus on the magnetic field and magnetic isotope effects on the products of organic reactions and discuss reactions of radical pairs and examine the spin states of radical pair systems as archetypes.Abstract:
Publisher Summary This chapter focuses on the magnetic field and magnetic isotope effects on the products of organic reactions. The chapter discusses reactions of radical pairs and examines the spin states of radical pair systems as archetypes. The crucial condition for observation of magnetic field effects is a competition between two processes: one of the processes must be magnetic field dependent and the other is magnetic field independent. As for magnetic field effects, magnetic isotope effects are generally very small or negligible in homogeneous solution, but may become significant in microheterogeneous environments, such as micelles. The chapter illustrates an example of a magnetic isotope effect involving 17 O, occurring in the thermolysis of endoperoxides of aromatic compounds. The decomposition of certain endoperoxides produces singlet molecular oxygen and the yield of singlet oxygen is magnetic field dependent. Such effects have been observed in many different kinds of chemical systems, and are readily interpreted in terms of the well-established principles of chemically induced magnetic polarization.read more
Citations
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Book ChapterDOI
Organic Reactivity in Aqueous Micelles and Similar Assemblies
TL;DR: In this article, thermal reactions in aqueous colloidal systems are analyzed from a mechanistic point of view, and discussion is focused on organic reactions in micelles or other colloidal droplets.
Journal ArticleDOI
Safety of Strong, Static Magnetic Fields
TL;DR: There is no replicated scientific study showing a health hazard associated with magnetic field exposure and no evidence for hazards associated with cumulative exposure to these fields, and the very high degree of patient safety in strong magnetic fields is attributed to the small value of the magnetic susceptibility of human tissues.
Journal ArticleDOI
Mass Fractionation Laws, Mass-Independent Effects, and Isotopic Anomalies
TL;DR: Isotopic variations usually follow mass-dependent fractionation, meaning that the relative variations in isotopic ratios scale with the difference in mass of the isotopes involved (e.g., δ17O ≈ 0.5×δ18O). In detail, the mass dependence of isotopic variations is not always the same and different natural processes can define distinct slopes in three-isotope diagrams as mentioned in this paper.
Journal ArticleDOI
Photochemistry of ketones adsorbed on porous silica
TL;DR: In this paper, the influence of surface coverage, silica average pore diameter, temperature, applied magnetic fields, and additives on the product distributions have been determined, consistent with a model in which the silica surface consists of two major regions, one consisting of stronger binding sites (active silanol groups) and the other consisting of weaker binding sites(free Silanol groups).
Journal ArticleDOI
Evidences of the static magnetic field influence on cellular systems
Wendell Wagner Campos Albuquerque,Romero Marcos Pedrosa Brandão Costa,Thiago de Salazar e Fernandes,Ana Lúcia Figueiredo Porto +3 more
TL;DR: This study intended to collect the most relevant issues separated by different topics (relating the SMF to its action on cellular systems) and analyze how the many field intensities, cell types and exposure time would affect the cell or intracellular structures.
References
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Book
Modern Molecular Photochemistry
TL;DR: In this paper, the authors bring students up to date with the advances in this field -the development of the theory of photoreactions, the utilization of photoresceptors in synthetic sequences, and the advancement of powerful laser techniques to study the mechanisms of the photoreaction.
Book
Molecular Quantum Mechanics
Peter Atkins,Ronald S. Friedman +1 more
TL;DR: In this paper, the Schrodinger equation has been used to describe the properties of the Schröter equation for electronic structure calculations and its application in the field of molecular mechanics.
Journal ArticleDOI
Photophysical and Photochemical Processes in Micellar Systems
TL;DR: In this paper, the authors present a Web of Science Record created on 2006-02-21, modified on 2017-05-12.Reference LPI-ARTICLE-1980-008
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