About: Search for a one-electron reduction of the cation radical of an %22extended viologen,%22 p-phenylene-bis-4,4´(1-aryl-2,6-diphenylpyridinium)

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About: Search for a one-electron reduction of the cation radical of an %22extended viologen,%22 p-phenylene-bis-4,4´(1-aryl-2,6-diphenylpyridinium) Goto Sponge NotDistinct Permalink

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rdf:type	skos:Concept http://linked.opendata.cz/ontology/domain/vavai/Vysledek
Description	Electrochemical one-electron reduction of the %22extended viologen%22 dication 1(2+) proceeds reversibly at -0.64 V (vs Ag vertical bar AgCl electrode) to yield the red cation radical 1(+center dot), which readily produces a dark-blue dimer hindering the observation of the one-electron reduction of 1(+center dot). The second reduction step at -1.4 V seen by conventional electrochemical methods then corresponds to the reduction of a dimer (1 - 1)(2+). Fast cyclic voltammetry at scan rates up to kV/s and voltammetry at micromolar concentrations eliminate the coupled bimolecular chemical reactions and permit the determination of the reduction potential of the cation radical 1(+center dot). Electrochemical one-electron reduction of the %22extended viologen%22 dication 1(2+) proceeds reversibly at -0.64 V (vs Ag vertical bar AgCl electrode) to yield the red cation radical 1(+center dot), which readily produces a dark-blue dimer hindering the observation of the one-electron reduction of 1(+center dot). The second reduction step at -1.4 V seen by conventional electrochemical methods then corresponds to the reduction of a dimer (1 - 1)(2+). Fast cyclic voltammetry at scan rates up to kV/s and voltammetry at micromolar concentrations eliminate the coupled bimolecular chemical reactions and permit the determination of the reduction potential of the cation radical 1(+center dot). (en) Elektrochemická jednoelektronová redukce dikationtu „rozšířeného viologenu“ probíhá reversibilně při -0.64 V za vzniku červeného kation readikálu, který snadno přechází na tmavě modrý dimer, čímž je znemožněno pozorování vlastní jednoelektronové redukce kation radikálu. Druhý redukční krok při -1 V, pozorovaný konvenčními elektrochemickými metodami odpovídá redukci dimeru. Rychlá voltametri při rychlostech polarizace řádu kV-sec a voltametrie při mikromolárních koncentracích eliminuje bimolekulární proces tvorby dimeru a umožňuje určit redox potenciál redukce kation radikálu. (cs)
Title	Search for a one-electron reduction of the cation radical of an %22extended viologen,%22 p-phenylene-bis-4,4´(1-aryl-2,6-diphenylpyridinium) Search for a one-electron reduction of the cation radical of an %22extended viologen,%22 p-phenylene-bis-4,4´(1-aryl-2,6-diphenylpyridinium) (en) Výzkum jednoelektronové redukce kation radikálu „rozšířeného viologenu“, p-fenylen-bis-4,4´-(1-aryl-2,6-dipyridinium (cs)
skos:prefLabel	Search for a one-electron reduction of the cation radical of an %22extended viologen,%22 p-phenylene-bis-4,4´(1-aryl-2,6-diphenylpyridinium) Search for a one-electron reduction of the cation radical of an %22extended viologen,%22 p-phenylene-bis-4,4´(1-aryl-2,6-diphenylpyridinium) (en) Výzkum jednoelektronové redukce kation radikálu „rozšířeného viologenu“, p-fenylen-bis-4,4´-(1-aryl-2,6-dipyridinium (cs)
skos:notation	RIV/61388955:_____/06:00044348!RIV07-AV0-61388955
http://linked.open.../vavai/riv/strany	E179;E183
http://linked.open...avai/riv/aktivita	P Z
http://linked.open...avai/riv/aktivity	P(GA203/04/0921), P(IAA400400505), P(KJB400400603), P(LC510), P(OC 140), Z(AV0Z40400503)
http://linked.open...iv/cisloPeriodika	11
http://linked.open...vai/riv/dodaniDat	2007
http://linked.open...aciTvurceVysledku	Fiedler, Jan Pospíšil, Lubomír Hromadová, Magdaléna Gál, Miroslav
http://linked.open.../riv/druhVysledku	J - Článek v odborném periodiku
http://linked.open...iv/duvernostUdaju	S - Úplné a pravdivé údaje nepodléhající ochraně podle zvláštních právních předpisů
http://linked.open...titaPredkladatele	Ústav fyzikální chemie J. Heyrovského AV ČR, v.v.i.
http://linked.open...dnocenehoVysledku	498605
http://linked.open...ai/riv/idVysledku	RIV/61388955:_____/06:00044348
http://linked.open...riv/jazykVysledku	eng - angličtina
http://linked.open.../riv/klicovaSlova	aromatic poly(pyridinium salt)s; methyl viologen; aqueous-solution; heptyl viologen (en)
http://linked.open.../riv/klicoveSlovo	aqueous-solution methyl viologen aromatic poly(pyridinium salt)s heptyl viologen
http://linked.open...odStatuVydavatele	US - Spojené státy americké
http://linked.open...ontrolniKodProRIV	[D80AD3B69559]
http://linked.open...i/riv/nazevZdroje	Journal of the Electrochemical Society
http://linked.open...in/vavai/riv/obor	CG
http://linked.open...ichTvurcuVysledku	4 (xsd:int)
http://linked.open...cetTvurcuVysledku	7 (xsd:int)
http://linked.open...vavai/riv/projekt	Center of nanotechnology and materials for nanoelectronics http://linked.opendata.cz/resource/domain/vavai/projekt/OC%20140 Synthesis of linear pyridinium-phenylene oligomers for use in molecular electronic Redox reactions of free radicals, reactivity in presence of host molecules Redox reactions of cyclooxygenase-2 inhibitors and their reactive intermediates in supramolecular nanocavities
http://linked.open...UplatneniVysledku	2006
http://linked.open...v/svazekPeriodika	153
http://linked.open...iv/tvurceVysledku	Fiedler, Jan Gál, Miroslav Hromadová, Magdaléna Pospíšil, Lubomír Valášek, M. Michl, J. Pecka, J.
http://linked.open...n/vavai/riv/zamer	Struktura, reaktivita a dynamika molekulárních a biomolekulárních systémů: teorie, experiment, aplikace
issn	0013-4651
number of pages	5 (xsd:int)

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