About: Extended viologen as a source of electric oscillations

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An Entity of Type : http://linked.opendata.cz/ontology/domain/vavai/Vysledek, within Data Space : linked.opendata.cz associated with source document(s)

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rdf:type	skos:Concept http://linked.opendata.cz/ontology/domain/vavai/Vysledek
Description	A long organic molecule 1 with five bipyridinium functions separated by benzene rings (extended viologen) undergoes a reversible multi-step electron transfer. Here we show that this decacation accepts electrons at the heterogeneous interface with the occurrence of the periodically changing electric reduction currents. According to the applied bias voltage the observed current-time dependence changes from chaotic through periodic and irregular to sinusoidal and finally to monotonous. A careful choice of the controlling parameters yields the sustained periodic sinusoidal currents lasting for a prolonged time. Oscillations stem from a mutual interplay of the heterogeneous supply of electrons and the homogeneous redox reactions (disproportionation) between the transient redox forms. In difference to many other electrochemical oscillating systems the described oscillations do not require any additional external impedance. A long organic molecule 1 with five bipyridinium functions separated by benzene rings (extended viologen) undergoes a reversible multi-step electron transfer. Here we show that this decacation accepts electrons at the heterogeneous interface with the occurrence of the periodically changing electric reduction currents. According to the applied bias voltage the observed current-time dependence changes from chaotic through periodic and irregular to sinusoidal and finally to monotonous. A careful choice of the controlling parameters yields the sustained periodic sinusoidal currents lasting for a prolonged time. Oscillations stem from a mutual interplay of the heterogeneous supply of electrons and the homogeneous redox reactions (disproportionation) between the transient redox forms. In difference to many other electrochemical oscillating systems the described oscillations do not require any additional external impedance. (en)
Title	Extended viologen as a source of electric oscillations Extended viologen as a source of electric oscillations (en)
skos:prefLabel	Extended viologen as a source of electric oscillations Extended viologen as a source of electric oscillations (en)
skos:notation	RIV/61388955:_____/11:00358314!RIV12-GA0-61388955
http://linked.open...avai/riv/aktivita	P Z
http://linked.open...avai/riv/aktivity	P(GA203/09/0705), P(IAA400400802), P(OC 140), Z(AV0Z40400503), Z(AV0Z40550506)
http://linked.open...iv/cisloPeriodika	10
http://linked.open...vai/riv/dodaniDat	2012
http://linked.open...aciTvurceVysledku	Pospíšil, Lubomír Hromadová, Magdaléna Gál, Miroslav Kolivoška, Viliam
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	199052
http://linked.open...ai/riv/idVysledku	RIV/61388955:_____/11:00358314
http://linked.open...riv/jazykVysledku	eng - angličtina
http://linked.open.../riv/klicovaSlova	electrochemical oscillators; electrochemistry; simple model (en)
http://linked.open.../riv/klicoveSlovo	electrochemical oscillators simple model electrochemistry
http://linked.open...odStatuVydavatele	GB - Spojené království Velké Británie a Severního Irska
http://linked.open...ontrolniKodProRIV	[D93237A32DA3]
http://linked.open...i/riv/nazevZdroje	Physical Chemistry Chemical Physics
http://linked.open...in/vavai/riv/obor	CG
http://linked.open...ichTvurcuVysledku	4 (xsd:int)
http://linked.open...cetTvurcuVysledku	6 (xsd:int)
http://linked.open...vavai/riv/projekt	Transfer of charge in single and assembled molecules http://linked.opendata.cz/resource/domain/vavai/projekt/OC%20140 Cationic redox catalysis and its role in the observation of electrochemical oscillatory phenomena.
http://linked.open...UplatneniVysledku	2011
http://linked.open...v/svazekPeriodika	13
http://linked.open...iv/tvurceVysledku	Gál, Miroslav Hromadová, Magdaléna Kolivoška, Viliam Pospíšil, Lubomír Valášek, Michal Fanelli, N.
http://linked.open...ain/vavai/riv/wos	000287584700022
http://linked.open...n/vavai/riv/zamer	Struktura, reaktivita a dynamika molekulárních a biomolekulárních systémů: teorie, experiment, aplikace Regulace biologických procesů: Chemické modulátory vybraných systémů významných pro medicínu a zemědělství
issn	1463-9076
number of pages	7 (xsd:int)
http://bibframe.org/vocab/doi	10.1039/c0cp01810d

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