Kenndler, Ernst (Author)
Between 1800 and 1805 about half a dozen different theories of electrolytic decomposition and the movement of the particles - for which we coin the term "electrophoretic current" - were formulated, all contributing to the discourse, but lacking consistency and none fully convincing. They are discussed nonetheless because most of them fell into oblivion, even though they are interesting for historical reasons. However, from 1805/1806 the predominant theory, formulated by Theodor von Grotthuß and independently by Humphry Davy assumed that polarized molecules of water or dissolved ions form chains between the two electrodes. Only the terminal atoms of these chains were in direct contact with the electrodes and were liberated by galvanic action, but are immediately replaced by neighboring atoms of the same type. This decomposition and recombination of the molecules driven by electric forces which follow the “action at a distance” principle like in Coulomb´s law takes place over the entire chains; they represent the electrophoretic current. However, in 1833 Michael Faraday refuted all previous theories. Two of his groundbreaking findings were of particular importance for the electrophoresis of ions: one was that electricity consists of elementary units of charge. The ions thus carry one or a multiple of these units. The other was the revolutionary theory of the electric lines of force in early 1840s, and of what was later called the electric field. With these findings Faraday fundamentally changed the previously prevailing view of the electrophoresis of ions.
...More
Article
Ernst Kenndler;
(2022)
Capillary Electrophoresis (CE) and its Basic Principles in Historical Retrospect. Part 3. 1840s –1900ca. The First CE of Ions in 1861. Transference Numbers, Migration Velocity, Conductivity, Mobility.
(/isis/citation/CBB045320518/)
Article
Ernst Kenndler;
Marek Minárik;
(2021)
Capillary Electrophoresis and its Basic Principles in Historical Retrospect Part 1. The Early Decades of the “Long Nineteenth Century”: The Voltaic Pile, and the Discovery of Electrolysis, Electrophoresis and Electroosmosis
(/isis/citation/CBB491437044/)
Article
Jaselskis, Bruno;
Moore, Carl E.;
Smolinski, Alfred von;
(2007)
Theodor von Grotthuss (1785--1822)---A Trail Blazer
(/isis/citation/CBB000831528/)
Article
Ernst Kenndler;
(2022)
Capillary Electrophoresis and its Basic Principles in Historical Retrospect. Part 4. Svante Arrhenius' Electrolyte Dissociation. From 56 Theses (1884) to Theory (1887)
(/isis/citation/CBB684558534/)
Article
Mills, Allan A.;
(2003)
Early Voltaic Batteries: An Evaluation in Modern Units and Application to the Work of Davy and Faraday
(/isis/citation/CBB000340483/)
Article
Rubin, Mordecai B.;
(2010)
The Development of the Mercury Lamp
(/isis/citation/CBB001232513/)
Article
Hattie Lloyd Edmondson;
(2019)
Chivalrous Chemistry
(/isis/citation/CBB716686962/)
Article
David Knight;
(2019)
Sources and Resources for Davy: 1960 and Now
(/isis/citation/CBB992122289/)
Article
William Lynch;
(2015)
Thresholds of Change: Why Didn’t Green Chemistry Happen Sooner?
(/isis/citation/CBB031301470/)
Article
Vangelis Koutalis;
(2014)
Making discoveries for a better life vs. bringing fruits to the national treasury: Davy, Babbage, Brewster and the (ongoing) struggle for the soul of science
(/isis/citation/CBB203024543/)
Article
Knight, David;
(August 2007)
Davy and the Placing of Potassium among the Elements
(/isis/citation/CBB001221270/)
Article
Kurtis Hessel;
(2016)
The Romantic-Era Lecture: Dividing and Reuniting the Arts and Sciences
(/isis/citation/CBB239805148/)
Book
Stock, John Edmonds;
(2003)
Memoirs of Thomas Beddoes, M. D
(/isis/citation/CBB000330959/)
Article
Frank A. J. L. James;
(2019)
Constructing Humphry Davy’s Biographical Image
(/isis/citation/CBB430195677/)
Chapter
Frank A. J. L. James;
(2018)
The Subversive Humphry Davy: Aristocracy and Establishing Chemical Research Laboratories in Late Eighteenth- and Early Nineteenth-Century England
(/isis/citation/CBB343237491/)
Book
Russell, Colin Archibald;
(2010)
From Atoms to Molecules: Studies in the History of Chemistry from the 19th Century
(/isis/citation/CBB001220264/)
Article
Andrew Lacey;
(2019)
New Light on John Davy
(/isis/citation/CBB433584959/)
Article
Frank A. J. L. James;
Sharon Ruston;
(2019)
New Studies on Humphry Davy: Introduction
(/isis/citation/CBB704125685/)
Article
Gregory Tate;
(2019)
Humphry Davy and the Problem of Analogy
(/isis/citation/CBB652985322/)
Article
Grossman, Mark I.;
(2010)
William Higgins at the Dublin Society, 1810--20: The Loss of a Professorship and a Claim to the Atomic Theory
(/isis/citation/CBB001022725/)
Be the first to comment!