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Intramolecular Electron Transfer At Metal Surfaces Iii Influence Of Bond Conjugation On Reduction Kinetics Of Cobaltiii Anchored To Metal Surfaces Via Thiophenecarboxylate Ligands
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Book Synopsis Intramolecular Electron Transfer at Metal Surfaces. III. Influence of Bond Conjugation on Reduction Kinetics of Cobalt(III) Anchored to Metal Surfaces Via Thiophenecarboxylate Ligands by : T. T. T. Li
Download or read book Intramolecular Electron Transfer at Metal Surfaces. III. Influence of Bond Conjugation on Reduction Kinetics of Cobalt(III) Anchored to Metal Surfaces Via Thiophenecarboxylate Ligands written by T. T. T. Li and published by . This book was released on 1983 with total page 32 pages. Available in PDF, EPUB and Kindle. Book excerpt: Unimolecular rate constants, K sub et, are reported for the one-electron electroreduction of pentaamminecobalt (III) anchored to mercury, gold, or copper electrodes via various thiophenecarboxylate ligands where the thiophene sulfur acts as the surface binding group and the carboxylate is coordinated to the cobalt reactants. At mercury, the rate parameters were found to be sensitive to the bridging ligand structure, substantially (ca. 10-20 fold) smaller values of K sub et being found for ligands containing one or more methylene groups between the thiophene sulfur and carboxylate oxygen than those featuring uninterrupted bond conjugation between the metal surface donor and Co(III) acceptor sites. Various contributions to these reactivity differences are asse-sed on the basis of the measured variations in the stability constants of the adsorbed precursor state, the rate constants for the homogeneous reduction of these complexes by hexammineruthenium (II), the unimolecular frequency factors obtained from the electrochemical activation parameters, and by comparison with ele-trochemical outer-sphere rate data. Taken together, these results provide strong evidence that the smaller values of K sub et values of the electronic transmission coefficient than are achieved with the conjugated ligands. Comparison is made with analogous results for intramolecular electron transfer via extended organic ligands in homogeneous solution. (Author).
Book Synopsis Intramolecular Electron Transfer at Metal Surfaces. V. Pendant Substituent Effects Upon Thiocarboxylate-Bridged Cobalt(III) Reduction Kinetics at Mercury and Gold Electrodes by : T. T. T. Li
Download or read book Intramolecular Electron Transfer at Metal Surfaces. V. Pendant Substituent Effects Upon Thiocarboxylate-Bridged Cobalt(III) Reduction Kinetics at Mercury and Gold Electrodes written by T. T. T. Li and published by . This book was released on 1985 with total page 17 pages. Available in PDF, EPUB and Kindle. Book excerpt: Unimolecular rate constants are reported for the reduction of pentaamminecobalt (III) anchored to mercury or gold electrodes via thiocarboxylate bridging ligands having the general form RSCH2COO ( - ). Since the carboxylate is bound to Co(III) and sulfur provides the surface binding group, the substituent R (where is various alkyl, carboxylate, ketone, or aromatic groups) will be pendant to the thiocarboxylate bridge linking the surface and cobalt reacting centers. Aleration of the pendant group R yields only small (ca. up to 4 fold) variations in unimolecular rate constants at a given electrode potential, although slightly larger variations occur in the stability of the precursor (absorbed reactant) state at mercury electrodes that are apparently due to specific interactions between R and the metal surface. The insensitivity of unimolecular rate constants to the pendant group is compared and contrasted with the effects of varying the substituent that bridges the redox center to the metal surface. Comparisons are also made with the pendent group effects for related redox processes in homogeneous solution. Originator furnished key words include: Bridging ligands, Pendent group effects, Surface excess, Percursor state.
Book Synopsis Herringbone and Pi-stacked Phases of Pent Pentacene Thin Films Grown on Metal Surfaces by : Joo Hyun Kang
Download or read book Herringbone and Pi-stacked Phases of Pent Pentacene Thin Films Grown on Metal Surfaces written by Joo Hyun Kang and published by . This book was released on 2005 with total page 256 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Applied Science & Technology Index by :
Download or read book Applied Science & Technology Index written by and published by . This book was released on 1985 with total page 2172 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Government Reports Announcements & Index by :
Download or read book Government Reports Announcements & Index written by and published by . This book was released on 1984 with total page 1196 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Electron-Transfer Kinetics of Redox Centers Anchored to Metal Surfaces: Weak- Versus Strong-Overlap Reaction Pathways by : S. W. Barr
Download or read book Electron-Transfer Kinetics of Redox Centers Anchored to Metal Surfaces: Weak- Versus Strong-Overlap Reaction Pathways written by S. W. Barr and published by . This book was released on 1983 with total page 19 pages. Available in PDF, EPUB and Kindle. Book excerpt: Unimolecular rate constants k sub et are presented for the one-electron electroreduction of various CoIII(NH3)5X complexes bound to mercury, platinum, and gold surfaces via either small inorganic or extended organic ligands X. These 'surface intramolecular' rate parameters are compared with estimates of k sub et for outer-sphere pathways obtained from homogeneous rate data in order to ascertain the consequences of reactant-surface binding upon the electron-transfer energetics. Only small or moderate decreases in the elementary reorganization barrier Delta G* sub et occur upon surface attachment, suggesting the occurrence of weak-overlap pathways. Aside from the dependence of k sub et upon the bridging ligand X at a given electrode potential due to differences in thermodynamic driving force, the observed variations in k sub et appear to be due in part to variations in the electronic transmission coefficient k sub el. Measurements of electrochemical frequency factors for reactants containing a series of thiophenecarboxylate bridges indicate that the substantial decreases in k sub et observed upon interruption of ligand conjugation arise predominantly from decreases in k sub el. (Author).
Book Synopsis Intramolecular Electron Transfer at Metal Surfaces. IV. Dependence of Tunneling Probability Upon Donor-Acceptor Separation Distance by : T. T. T. Li
Download or read book Intramolecular Electron Transfer at Metal Surfaces. IV. Dependence of Tunneling Probability Upon Donor-Acceptor Separation Distance written by T. T. T. Li and published by . This book was released on 1984 with total page 11 pages. Available in PDF, EPUB and Kindle. Book excerpt: Unimolecular electron-transfer rate constants, k sub et, are reported for the one-electron reduction of pentaaminecobalt (III) attached to gold and mercury electrodes via thioalkylcarboxylate ligands containing varying numbers, n, of alkyl carbons. While similar values of k sub et were found at mercury for each reaction, for close-packed monolayers at gold the k sub et values decreased by circa 10 to the 4th power as an increased from one to five. This effect is identified with increasingly nonadiabatic pathways as an increases, a linear plot of log k sub et versus n being obtained. The results provide estimates of the electronic transmission coefficient as a function of the surface-Co(III) separation distance.
Book Synopsis Electron Transfer Reactions by : R. D. Cannon
Download or read book Electron Transfer Reactions written by R. D. Cannon and published by Butterworth-Heinemann. This book was released on 2016-07-29 with total page 364 pages. Available in PDF, EPUB and Kindle. Book excerpt: Electron Transfer Reactions deals with the mechanisms of electron transfer reactions between metal ions in solution, as well as the electron exchange between atoms or molecules in either the gaseous or solid state. The book is divided into three parts. Part 1 covers the electron transfer between atoms and molecules in the gas state. Part 2 tackles the reaction paths of oxidation states and binuclear intermediates, as well as the mechanisms of electron transfer. Part 3 discusses the theories and models of the electron transfer process; theories and experiments involving bridged electron transfer; optical electron transfer; and electron transfer in the solid state. The text is recommended for chemists who would like to know more about the principles and mechanisms behind electron transfer reactions.
Book Synopsis Intramolecular Electron Transfer at Metal Surfaces. I. Relative Energetics of Some Corresponding Outer- and Inner-Sphere Pathways Involving Halide and Pseudohalide Bridging Ligands by : S. W. Barr
Download or read book Intramolecular Electron Transfer at Metal Surfaces. I. Relative Energetics of Some Corresponding Outer- and Inner-Sphere Pathways Involving Halide and Pseudohalide Bridging Ligands written by S. W. Barr and published by . This book was released on 1983 with total page 31 pages. Available in PDF, EPUB and Kindle. Book excerpt: The electroreduction kinetics of a number of Co(III) ammine and ethylene-diamine complexes containing chloride, bromide, and isothiocyanate ligands have been studied at platinum- and gold-aqueous interfaces in order to investigate the consequences of attaching simple transition-metal reactants to electrocatalytic metal surfaces upon the electron-transfer energetics. The virtues of evaluating unimolecular rate constants k sub et (per sec) for comparing the energetics of electrochemical inner- and outer-sphere pathways are pointed out.
Book Synopsis Electron Transfer Reactions of Complex Ions in Solution by : Henry Taube
Download or read book Electron Transfer Reactions of Complex Ions in Solution written by Henry Taube and published by Elsevier. This book was released on 2012-12-02 with total page 113 pages. Available in PDF, EPUB and Kindle. Book excerpt: Electron Transfer Reactions of Complex Ions in Solution covers the significant development of some important area of electron transfer reactions of complex ions. This four-chapter book emerged from a series of lectures at the Polytechnic Institute of Brooklyn in November and December 1967. Chapter I presents research studies in cation hydration. This chapter describes principal methods for composition determination of the first coordination spheres of the aquo ions. Chapter II examines the distinction between reactions in which electron transfer takes place from one primary bond system to another. Chapter III discusses some aspects of ligand effects in electron-transfer reactions. This chapter demonstrates that differences in the behavior of systems can be expected at least in the extremes of mechanisms. Chapter IV deals with the history, principles and applications of the induced electron-transfer effect. This book is of great value to electrochemists, students, and researchers.
Book Synopsis Electron Transfer Through Conjugated Organic Ligands by : James Kendall Hurst
Download or read book Electron Transfer Through Conjugated Organic Ligands written by James Kendall Hurst and published by . This book was released on 1966 with total page 236 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Electron Transfer Reactions by : Stephan S. Isied
Download or read book Electron Transfer Reactions written by Stephan S. Isied and published by . This book was released on 1997 with total page 472 pages. Available in PDF, EPUB and Kindle. Book excerpt: Begins with a historical overview by Henry Taube. Overviews the advances pioneered by Taube, including mechanisms of electron transfer reactions, charge transfer complexes, and *p back bonding effects in metal-ligand interactions. Discusses applications of principles of electron transfer to diverse areas of chemistry and biology such as the selective and controlled oxidation of organic functional groups, polymerization catalysis, metal biological interactions with DNA, biological electron transfer reactions, and new imaging agents in diagnostic medicine.
Book Synopsis Electron Transfer at Metal Surfaces by : Shachi S. Gosavi
Download or read book Electron Transfer at Metal Surfaces written by Shachi S. Gosavi and published by . This book was released on 2003 with total page 166 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Polyoxometalate Molecular Science by : Juan J. Borrás-Almenar
Download or read book Polyoxometalate Molecular Science written by Juan J. Borrás-Almenar and published by Springer Science & Business Media. This book was released on 2012-12-06 with total page 473 pages. Available in PDF, EPUB and Kindle. Book excerpt: Polyoxometalates (POMs) form a large, distinctive class of molecular inorganic compounds of unrivaled electronic versatility and structural variation, with impacts ranging from chemistry, catalysis, and materials science to biology, and medicine. This book covers the basic principles governing the structure, bonding and reactivity of these metal-oxygen cluster anions and the major developments in their molecular science. The book comprises three sections. The first covers areas ranging from topological principles via synthesis and stability to reactivity in solution. It also focuses on the physical methods currently used to extract information on the molecular and electronic structures as well as the physical properties of these clusters. The second part reviews different types of POMs, focusing on those systems that currently impact other areas of interest, such as supramolecular chemistry, nanochemistry and molecular magnetism. The third section is devoted to POM-based materials and their applications and prospects in catalysis and materials science.
Book Synopsis CRC Handbook of Chemistry and Physics, 85th Edition by : David R. Lide
Download or read book CRC Handbook of Chemistry and Physics, 85th Edition written by David R. Lide and published by CRC Press. This book was released on 2004-06-29 with total page 2900 pages. Available in PDF, EPUB and Kindle. Book excerpt: Get a FREE first edition facsimile with each copy of the 85th! Researchers around the world depend upon having access to authoritative, up-to-date data. And for more than 90 years, they have relied on the CRC Handbook of Chemistry and Physics for that data. This year is no exception. New tables, extensive updates, and added sections mean the Handbook has again set a new standard for reliability, utility, and thoroughness. This edition features a Foreword by world renowned neurologist and author Oliver Sacks, a free facsimile of the 1913 first edition of the Handbook, and thumb tabs that make it easier to locate particular data. New tables in this edition include: Index of Refraction of Inorganic Crystals Upper and Lower Azeotropic Data for Binary Mixtures Critical Solution Temperatures of Polymer Solutions Density of Solvents as a Function of Temperature By popular request, several tables omitted from recent editions are back, including Coefficients of Frictionand Miscibility of Organic Solvents. Ten other sections have been substantially revised, with some, such as the Table of the Isotopes and Thermal Conductivity of Liquids, significantly expanded. The Fundamental Physical Constants section has been updated with the latest CODATA/NIST values, and the Mathematical Tables appendix now features several new sections covering topics that include orthogonal polynomials Clebsch-Gordan coefficients, and statistics.
Download or read book Adamantane written by Raymond C. Fort and published by . This book was released on 1976 with total page 424 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Metal Electrodeposition by : Magdalena Nuñez
Download or read book Metal Electrodeposition written by Magdalena Nuñez and published by Nova Publishers. This book was released on 2005 with total page 226 pages. Available in PDF, EPUB and Kindle. Book excerpt: Electrochemistry is the branch of chemistry that deals with the chemical action of electricity and the production of electricity by chemical reactions. In a world short of energy sources yet long on energy use, electrochemistry is a critical component of the mix necessary to keep the world economies growing. Electrochemistry is involved with such important applications as batteries, fuel cells, corrosion studies, hydrogen energy conversion, and bioelectricity. Research on electrolytes, cells, and electrodes is within the scope of this old but extremely dynamic field. This book details advances in metal electrodeposition.
