Photon-Triggered Complex Formation: Radical Complexes of o-Benzosemiquinone, Dopa, Dopamine and Adrenaline Formed by Electron-Transfer Reaction from Excited Tris (2,2′-bipyridyl)ruthenium (II)

The pyrocatechol derivatives, dopamine (2), adrenaline (3) and L-dopa (4) form in their semiquinoid oxidation states complexes with several closed-shell metal ions like Zn2+, Cd2+ and Y3+. This complex formation can be triggered by visible light via a one-electron transfer reaction from the pyrocate...
Ausführliche Beschreibung

Gespeichert in:

Autor*in:	Plancherel, Dominique von Zelewsky, Alex

Format:	E-Artikel
Sprache:	Deutsch

Erschienen:	1982

Umfang:	8 Ill. ; 3 Tab. 12

Reproduktion:	Wiley InterScience Backfile Collection 1832-2000
Übergeordnetes Werk:	in: Helvetica Chimica Acta - New York, NY : Wiley-VCH, 65(1982) vom: Juni, Seite 1929-1940
Übergeordnetes Werk:	volume:65 ; year:1982 ; month:06 ; pages:1929-1940 ; extent:12

Links:	Link aufrufen

Katalog-ID:	NLEJ162645627

Internformat


LEADER	01000caa a22002652 4500
001	NLEJ162645627
003	DE-627
005	20210707094451.0
007	cr uuu---uuuuu
008	070201s1982 xx \|\|\|\|\|o 00\| \|\|ger c
035			\|a (DE-627)NLEJ162645627
040			\|a DE-627 \|b ger \|c DE-627 \|e rakwb
041			\|a ger
245	1	0	\|a Photon-Triggered Complex Formation: Radical Complexes of o-Benzosemiquinone, Dopa, Dopamine and Adrenaline Formed by Electron-Transfer Reaction from Excited Tris (2,2′-bipyridyl)ruthenium (II)
264		1	\|c 1982
300			\|b 8 Ill. \|b 3 Tab.
300			\|a 12
336			\|a nicht spezifiziert \|b zzz \|2 rdacontent
337			\|a nicht spezifiziert \|b z \|2 rdamedia
338			\|a nicht spezifiziert \|b zu \|2 rdacarrier
520			\|a The pyrocatechol derivatives, dopamine (2), adrenaline (3) and L-dopa (4) form in their semiquinoid oxidation states complexes with several closed-shell metal ions like Zn2+, Cd2+ and Y3+. This complex formation can be triggered by visible light via a one-electron transfer reaction from the pyrocatechol derivative to (3CT)Ru(bpy)32+, which is thereby reduced (Schemes 1 and 2), The quenching of the triplet charge-transfer state, (3CT)Ru(bpy)32+ cannot be measured by conventional methods (Stern-Volmer plot), because the bimolecular electron-transfer rate is too slow (kq < 10-7 M-1 s-1). ESR. spectroscopy shows, however, clearly the paramagnetic reaction products. The concentration of these paramagnetic species is strongly enhanced by complex formation.The hindered rotation of the side chain in L-dopa and in its Y3+-complex is described within a two-jump model, which gives best agreement between calculated and measured spectra assuming an energy of 37 kJmol-1 for the rotational barrier.
533			\|f Wiley InterScience Backfile Collection 1832-2000
700	1		\|a Plancherel, Dominique \|4 oth
700	1		\|a von Zelewsky, Alex \|4 oth
773	0	8	\|i in \|t Helvetica Chimica Acta \|d New York, NY : Wiley-VCH \|g 65(1982) vom: Juni, Seite 1929-1940 \|w (DE-627)NLEJ159071178 \|w (DE-600)1475013-2 \|x 0018-019X \|7 nnns
773	1	8	\|g volume:65 \|g year:1982 \|g month:06 \|g pages:1929-1940 \|g extent:12
856	4	0	\|u http://dx.doi.org/10.1002/hlca.19820650627 \|q text/html \|z Deutschlandweit zugänglich
912			\|a GBV_USEFLAG_U
912			\|a ZDB-1-WIS
912			\|a GBV_NL_ARTICLE
951			\|a AR
952			\|d 65 \|j 1982 \|c 6 \|h 1929-1940 \|g 12

Indexfelder

matchkey_str	article:0018019X:1982----::htnrgeecmlxomtordclopeeooezsmqioeoaoaienarnlnfrebeetotaserat
hierarchy_sort_str	1982
publishDate	1982
allfields	(DE-627)NLEJ162645627 DE-627 ger DE-627 rakwb ger Photon-Triggered Complex Formation: Radical Complexes of o-Benzosemiquinone, Dopa, Dopamine and Adrenaline Formed by Electron-Transfer Reaction from Excited Tris (2,2′-bipyridyl)ruthenium (II) 1982 8 Ill. 3 Tab. 12 nicht spezifiziert zzz rdacontent nicht spezifiziert z rdamedia nicht spezifiziert zu rdacarrier The pyrocatechol derivatives, dopamine (2), adrenaline (3) and L-dopa (4) form in their semiquinoid oxidation states complexes with several closed-shell metal ions like Zn2+, Cd2+ and Y3+. This complex formation can be triggered by visible light via a one-electron transfer reaction from the pyrocatechol derivative to (3CT)Ru(bpy)32+, which is thereby reduced (Schemes 1 and 2), The quenching of the triplet charge-transfer state, (3CT)Ru(bpy)32+ cannot be measured by conventional methods (Stern-Volmer plot), because the bimolecular electron-transfer rate is too slow (kq < 10-7 M-1 s-1). ESR. spectroscopy shows, however, clearly the paramagnetic reaction products. The concentration of these paramagnetic species is strongly enhanced by complex formation.The hindered rotation of the side chain in L-dopa and in its Y3+-complex is described within a two-jump model, which gives best agreement between calculated and measured spectra assuming an energy of 37 kJmol-1 for the rotational barrier. Wiley InterScience Backfile Collection 1832-2000 Plancherel, Dominique oth von Zelewsky, Alex oth in Helvetica Chimica Acta New York, NY : Wiley-VCH 65(1982) vom: Juni, Seite 1929-1940 (DE-627)NLEJ159071178 (DE-600)1475013-2 0018-019X nnns volume:65 year:1982 month:06 pages:1929-1940 extent:12 http://dx.doi.org/10.1002/hlca.19820650627 text/html Deutschlandweit zugänglich GBV_USEFLAG_U ZDB-1-WIS GBV_NL_ARTICLE AR 65 1982 6 1929-1940 12
spelling	(DE-627)NLEJ162645627 DE-627 ger DE-627 rakwb ger Photon-Triggered Complex Formation: Radical Complexes of o-Benzosemiquinone, Dopa, Dopamine and Adrenaline Formed by Electron-Transfer Reaction from Excited Tris (2,2′-bipyridyl)ruthenium (II) 1982 8 Ill. 3 Tab. 12 nicht spezifiziert zzz rdacontent nicht spezifiziert z rdamedia nicht spezifiziert zu rdacarrier The pyrocatechol derivatives, dopamine (2), adrenaline (3) and L-dopa (4) form in their semiquinoid oxidation states complexes with several closed-shell metal ions like Zn2+, Cd2+ and Y3+. This complex formation can be triggered by visible light via a one-electron transfer reaction from the pyrocatechol derivative to (3CT)Ru(bpy)32+, which is thereby reduced (Schemes 1 and 2), The quenching of the triplet charge-transfer state, (3CT)Ru(bpy)32+ cannot be measured by conventional methods (Stern-Volmer plot), because the bimolecular electron-transfer rate is too slow (kq < 10-7 M-1 s-1). ESR. spectroscopy shows, however, clearly the paramagnetic reaction products. The concentration of these paramagnetic species is strongly enhanced by complex formation.The hindered rotation of the side chain in L-dopa and in its Y3+-complex is described within a two-jump model, which gives best agreement between calculated and measured spectra assuming an energy of 37 kJmol-1 for the rotational barrier. Wiley InterScience Backfile Collection 1832-2000 Plancherel, Dominique oth von Zelewsky, Alex oth in Helvetica Chimica Acta New York, NY : Wiley-VCH 65(1982) vom: Juni, Seite 1929-1940 (DE-627)NLEJ159071178 (DE-600)1475013-2 0018-019X nnns volume:65 year:1982 month:06 pages:1929-1940 extent:12 http://dx.doi.org/10.1002/hlca.19820650627 text/html Deutschlandweit zugänglich GBV_USEFLAG_U ZDB-1-WIS GBV_NL_ARTICLE AR 65 1982 6 1929-1940 12
allfields_unstemmed	(DE-627)NLEJ162645627 DE-627 ger DE-627 rakwb ger Photon-Triggered Complex Formation: Radical Complexes of o-Benzosemiquinone, Dopa, Dopamine and Adrenaline Formed by Electron-Transfer Reaction from Excited Tris (2,2′-bipyridyl)ruthenium (II) 1982 8 Ill. 3 Tab. 12 nicht spezifiziert zzz rdacontent nicht spezifiziert z rdamedia nicht spezifiziert zu rdacarrier The pyrocatechol derivatives, dopamine (2), adrenaline (3) and L-dopa (4) form in their semiquinoid oxidation states complexes with several closed-shell metal ions like Zn2+, Cd2+ and Y3+. This complex formation can be triggered by visible light via a one-electron transfer reaction from the pyrocatechol derivative to (3CT)Ru(bpy)32+, which is thereby reduced (Schemes 1 and 2), The quenching of the triplet charge-transfer state, (3CT)Ru(bpy)32+ cannot be measured by conventional methods (Stern-Volmer plot), because the bimolecular electron-transfer rate is too slow (kq < 10-7 M-1 s-1). ESR. spectroscopy shows, however, clearly the paramagnetic reaction products. The concentration of these paramagnetic species is strongly enhanced by complex formation.The hindered rotation of the side chain in L-dopa and in its Y3+-complex is described within a two-jump model, which gives best agreement between calculated and measured spectra assuming an energy of 37 kJmol-1 for the rotational barrier. Wiley InterScience Backfile Collection 1832-2000 Plancherel, Dominique oth von Zelewsky, Alex oth in Helvetica Chimica Acta New York, NY : Wiley-VCH 65(1982) vom: Juni, Seite 1929-1940 (DE-627)NLEJ159071178 (DE-600)1475013-2 0018-019X nnns volume:65 year:1982 month:06 pages:1929-1940 extent:12 http://dx.doi.org/10.1002/hlca.19820650627 text/html Deutschlandweit zugänglich GBV_USEFLAG_U ZDB-1-WIS GBV_NL_ARTICLE AR 65 1982 6 1929-1940 12
allfieldsGer	(DE-627)NLEJ162645627 DE-627 ger DE-627 rakwb ger Photon-Triggered Complex Formation: Radical Complexes of o-Benzosemiquinone, Dopa, Dopamine and Adrenaline Formed by Electron-Transfer Reaction from Excited Tris (2,2′-bipyridyl)ruthenium (II) 1982 8 Ill. 3 Tab. 12 nicht spezifiziert zzz rdacontent nicht spezifiziert z rdamedia nicht spezifiziert zu rdacarrier The pyrocatechol derivatives, dopamine (2), adrenaline (3) and L-dopa (4) form in their semiquinoid oxidation states complexes with several closed-shell metal ions like Zn2+, Cd2+ and Y3+. This complex formation can be triggered by visible light via a one-electron transfer reaction from the pyrocatechol derivative to (3CT)Ru(bpy)32+, which is thereby reduced (Schemes 1 and 2), The quenching of the triplet charge-transfer state, (3CT)Ru(bpy)32+ cannot be measured by conventional methods (Stern-Volmer plot), because the bimolecular electron-transfer rate is too slow (kq < 10-7 M-1 s-1). ESR. spectroscopy shows, however, clearly the paramagnetic reaction products. The concentration of these paramagnetic species is strongly enhanced by complex formation.The hindered rotation of the side chain in L-dopa and in its Y3+-complex is described within a two-jump model, which gives best agreement between calculated and measured spectra assuming an energy of 37 kJmol-1 for the rotational barrier. Wiley InterScience Backfile Collection 1832-2000 Plancherel, Dominique oth von Zelewsky, Alex oth in Helvetica Chimica Acta New York, NY : Wiley-VCH 65(1982) vom: Juni, Seite 1929-1940 (DE-627)NLEJ159071178 (DE-600)1475013-2 0018-019X nnns volume:65 year:1982 month:06 pages:1929-1940 extent:12 http://dx.doi.org/10.1002/hlca.19820650627 text/html Deutschlandweit zugänglich GBV_USEFLAG_U ZDB-1-WIS GBV_NL_ARTICLE AR 65 1982 6 1929-1940 12
allfieldsSound	(DE-627)NLEJ162645627 DE-627 ger DE-627 rakwb ger Photon-Triggered Complex Formation: Radical Complexes of o-Benzosemiquinone, Dopa, Dopamine and Adrenaline Formed by Electron-Transfer Reaction from Excited Tris (2,2′-bipyridyl)ruthenium (II) 1982 8 Ill. 3 Tab. 12 nicht spezifiziert zzz rdacontent nicht spezifiziert z rdamedia nicht spezifiziert zu rdacarrier The pyrocatechol derivatives, dopamine (2), adrenaline (3) and L-dopa (4) form in their semiquinoid oxidation states complexes with several closed-shell metal ions like Zn2+, Cd2+ and Y3+. This complex formation can be triggered by visible light via a one-electron transfer reaction from the pyrocatechol derivative to (3CT)Ru(bpy)32+, which is thereby reduced (Schemes 1 and 2), The quenching of the triplet charge-transfer state, (3CT)Ru(bpy)32+ cannot be measured by conventional methods (Stern-Volmer plot), because the bimolecular electron-transfer rate is too slow (kq < 10-7 M-1 s-1). ESR. spectroscopy shows, however, clearly the paramagnetic reaction products. The concentration of these paramagnetic species is strongly enhanced by complex formation.The hindered rotation of the side chain in L-dopa and in its Y3+-complex is described within a two-jump model, which gives best agreement between calculated and measured spectra assuming an energy of 37 kJmol-1 for the rotational barrier. Wiley InterScience Backfile Collection 1832-2000 Plancherel, Dominique oth von Zelewsky, Alex oth in Helvetica Chimica Acta New York, NY : Wiley-VCH 65(1982) vom: Juni, Seite 1929-1940 (DE-627)NLEJ159071178 (DE-600)1475013-2 0018-019X nnns volume:65 year:1982 month:06 pages:1929-1940 extent:12 http://dx.doi.org/10.1002/hlca.19820650627 text/html Deutschlandweit zugänglich GBV_USEFLAG_U ZDB-1-WIS GBV_NL_ARTICLE AR 65 1982 6 1929-1940 12
language	German
source	in Helvetica Chimica Acta 65(1982) vom: Juni, Seite 1929-1940 volume:65 year:1982 month:06 pages:1929-1940 extent:12
sourceStr	in Helvetica Chimica Acta 65(1982) vom: Juni, Seite 1929-1940 volume:65 year:1982 month:06 pages:1929-1940 extent:12
format_phy_str_mv	Article
institution	findex.gbv.de
isfreeaccess_bool	false
container_title	Helvetica Chimica Acta
authorswithroles_txt_mv	Plancherel, Dominique @@oth@@ von Zelewsky, Alex @@oth@@
publishDateDaySort_date	1982-06-01T00:00:00Z
hierarchy_top_id	NLEJ159071178
id	NLEJ162645627
language_de	deutsch
fullrecord	<?xml version="1.0" encoding="UTF-8"?><collection xmlns="http://www.loc.gov/MARC21/slim"><record><leader>01000caa a22002652 4500</leader><controlfield tag="001">NLEJ162645627</controlfield><controlfield tag="003">DE-627</controlfield><controlfield tag="005">20210707094451.0</controlfield><controlfield tag="007">cr uuu---uuuuu</controlfield><controlfield tag="008">070201s1982 xx \|\|\|\|\|o 00\| \|\|ger c</controlfield><datafield tag="035" ind1=" " ind2=" "><subfield code="a">(DE-627)NLEJ162645627</subfield></datafield><datafield tag="040" ind1=" " ind2=" "><subfield code="a">DE-627</subfield><subfield code="b">ger</subfield><subfield code="c">DE-627</subfield><subfield code="e">rakwb</subfield></datafield><datafield tag="041" ind1=" " ind2=" "><subfield code="a">ger</subfield></datafield><datafield tag="245" ind1="1" ind2="0"><subfield code="a">Photon-Triggered Complex Formation: Radical Complexes of o-Benzosemiquinone, Dopa, Dopamine and Adrenaline Formed by Electron-Transfer Reaction from Excited Tris (2,2′-bipyridyl)ruthenium (II)</subfield></datafield><datafield tag="264" ind1=" " ind2="1"><subfield code="c">1982</subfield></datafield><datafield tag="300" ind1=" " ind2=" "><subfield code="b">8 Ill.</subfield><subfield code="b">3 Tab.</subfield></datafield><datafield tag="300" ind1=" " ind2=" "><subfield code="a">12</subfield></datafield><datafield tag="336" ind1=" " ind2=" "><subfield code="a">nicht spezifiziert</subfield><subfield code="b">zzz</subfield><subfield code="2">rdacontent</subfield></datafield><datafield tag="337" ind1=" " ind2=" "><subfield code="a">nicht spezifiziert</subfield><subfield code="b">z</subfield><subfield code="2">rdamedia</subfield></datafield><datafield tag="338" ind1=" " ind2=" "><subfield code="a">nicht spezifiziert</subfield><subfield code="b">zu</subfield><subfield code="2">rdacarrier</subfield></datafield><datafield tag="520" ind1=" " ind2=" "><subfield code="a">The pyrocatechol derivatives, dopamine (2), adrenaline (3) and L-dopa (4) form in their semiquinoid oxidation states complexes with several closed-shell metal ions like Zn2+, Cd2+ and Y3+. This complex formation can be triggered by visible light via a one-electron transfer reaction from the pyrocatechol derivative to (3CT)Ru(bpy)32+, which is thereby reduced (Schemes 1 and 2), The quenching of the triplet charge-transfer state, (3CT)Ru(bpy)32+ cannot be measured by conventional methods (Stern-Volmer plot), because the bimolecular electron-transfer rate is too slow (kq < 10-7 M-1 s-1). ESR. spectroscopy shows, however, clearly the paramagnetic reaction products. The concentration of these paramagnetic species is strongly enhanced by complex formation.The hindered rotation of the side chain in L-dopa and in its Y3+-complex is described within a two-jump model, which gives best agreement between calculated and measured spectra assuming an energy of 37 kJmol-1 for the rotational barrier.</subfield></datafield><datafield tag="533" ind1=" " ind2=" "><subfield code="f">Wiley InterScience Backfile Collection 1832-2000</subfield></datafield><datafield tag="700" ind1="1" ind2=" "><subfield code="a">Plancherel, Dominique</subfield><subfield code="4">oth</subfield></datafield><datafield tag="700" ind1="1" ind2=" "><subfield code="a">von Zelewsky, Alex</subfield><subfield code="4">oth</subfield></datafield><datafield tag="773" ind1="0" ind2="8"><subfield code="i">in</subfield><subfield code="t">Helvetica Chimica Acta</subfield><subfield code="d">New York, NY : Wiley-VCH</subfield><subfield code="g">65(1982) vom: Juni, Seite 1929-1940</subfield><subfield code="w">(DE-627)NLEJ159071178</subfield><subfield code="w">(DE-600)1475013-2</subfield><subfield code="x">0018-019X</subfield><subfield code="7">nnns</subfield></datafield><datafield tag="773" ind1="1" ind2="8"><subfield code="g">volume:65</subfield><subfield code="g">year:1982</subfield><subfield code="g">month:06</subfield><subfield code="g">pages:1929-1940</subfield><subfield code="g">extent:12</subfield></datafield><datafield tag="856" ind1="4" ind2="0"><subfield code="u">http://dx.doi.org/10.1002/hlca.19820650627</subfield><subfield code="q">text/html</subfield><subfield code="z">Deutschlandweit zugänglich</subfield></datafield><datafield tag="912" ind1=" " ind2=" "><subfield code="a">GBV_USEFLAG_U</subfield></datafield><datafield tag="912" ind1=" " ind2=" "><subfield code="a">ZDB-1-WIS</subfield></datafield><datafield tag="912" ind1=" " ind2=" "><subfield code="a">GBV_NL_ARTICLE</subfield></datafield><datafield tag="951" ind1=" " ind2=" "><subfield code="a">AR</subfield></datafield><datafield tag="952" ind1=" " ind2=" "><subfield code="d">65</subfield><subfield code="j">1982</subfield><subfield code="c">6</subfield><subfield code="h">1929-1940</subfield><subfield code="g">12</subfield></datafield></record></collection>
series2	Wiley InterScience Backfile Collection 1832-2000
ppnlink_with_tag_str_mv	@@773@@(DE-627)NLEJ159071178
format	electronic Article
delete_txt_mv	keep
collection	NL
remote_str	true
illustrated	Illustrated
issn	0018-019X
topic_title	Photon-Triggered Complex Formation: Radical Complexes of o-Benzosemiquinone, Dopa, Dopamine and Adrenaline Formed by Electron-Transfer Reaction from Excited Tris (2,2′-bipyridyl)ruthenium (II)
format_facet	Elektronische Aufsätze Aufsätze Elektronische Ressource
format_main_str_mv	Text Zeitschrift/Artikel
carriertype_str_mv	zu
author2_variant	d p dp z a v za zav
hierarchy_parent_title	Helvetica Chimica Acta
hierarchy_parent_id	NLEJ159071178
hierarchy_top_title	Helvetica Chimica Acta
isfreeaccess_txt	false
familylinks_str_mv	(DE-627)NLEJ159071178 (DE-600)1475013-2
title	Photon-Triggered Complex Formation: Radical Complexes of o-Benzosemiquinone, Dopa, Dopamine and Adrenaline Formed by Electron-Transfer Reaction from Excited Tris (2,2′-bipyridyl)ruthenium (II)
spellingShingle	Photon-Triggered Complex Formation: Radical Complexes of o-Benzosemiquinone, Dopa, Dopamine and Adrenaline Formed by Electron-Transfer Reaction from Excited Tris (2,2′-bipyridyl)ruthenium (II)
ctrlnum	(DE-627)NLEJ162645627
title_full	Photon-Triggered Complex Formation: Radical Complexes of o-Benzosemiquinone, Dopa, Dopamine and Adrenaline Formed by Electron-Transfer Reaction from Excited Tris (2,2′-bipyridyl)ruthenium (II)
journal	Helvetica Chimica Acta
journalStr	Helvetica Chimica Acta
lang_code	ger
isOA_bool	false
recordtype	marc
publishDateSort	1982
contenttype_str_mv	zzz
container_start_page	1929
container_volume	65
physical	8 Ill. 3 Tab. 12
format_se	Elektronische Aufsätze
title_sort	photon-triggered complex formation: radical complexes of o-benzosemiquinone, dopa, dopamine and adrenaline formed by electron-transfer reaction from excited tris (2,2′-bipyridyl)ruthenium (ii)
title_auth	Photon-Triggered Complex Formation: Radical Complexes of o-Benzosemiquinone, Dopa, Dopamine and Adrenaline Formed by Electron-Transfer Reaction from Excited Tris (2,2′-bipyridyl)ruthenium (II)
abstract	The pyrocatechol derivatives, dopamine (2), adrenaline (3) and L-dopa (4) form in their semiquinoid oxidation states complexes with several closed-shell metal ions like Zn2+, Cd2+ and Y3+. This complex formation can be triggered by visible light via a one-electron transfer reaction from the pyrocatechol derivative to (3CT)Ru(bpy)32+, which is thereby reduced (Schemes 1 and 2), The quenching of the triplet charge-transfer state, (3CT)Ru(bpy)32+ cannot be measured by conventional methods (Stern-Volmer plot), because the bimolecular electron-transfer rate is too slow (kq < 10-7 M-1 s-1). ESR. spectroscopy shows, however, clearly the paramagnetic reaction products. The concentration of these paramagnetic species is strongly enhanced by complex formation.The hindered rotation of the side chain in L-dopa and in its Y3+-complex is described within a two-jump model, which gives best agreement between calculated and measured spectra assuming an energy of 37 kJmol-1 for the rotational barrier.
abstractGer	The pyrocatechol derivatives, dopamine (2), adrenaline (3) and L-dopa (4) form in their semiquinoid oxidation states complexes with several closed-shell metal ions like Zn2+, Cd2+ and Y3+. This complex formation can be triggered by visible light via a one-electron transfer reaction from the pyrocatechol derivative to (3CT)Ru(bpy)32+, which is thereby reduced (Schemes 1 and 2), The quenching of the triplet charge-transfer state, (3CT)Ru(bpy)32+ cannot be measured by conventional methods (Stern-Volmer plot), because the bimolecular electron-transfer rate is too slow (kq < 10-7 M-1 s-1). ESR. spectroscopy shows, however, clearly the paramagnetic reaction products. The concentration of these paramagnetic species is strongly enhanced by complex formation.The hindered rotation of the side chain in L-dopa and in its Y3+-complex is described within a two-jump model, which gives best agreement between calculated and measured spectra assuming an energy of 37 kJmol-1 for the rotational barrier.
abstract_unstemmed	The pyrocatechol derivatives, dopamine (2), adrenaline (3) and L-dopa (4) form in their semiquinoid oxidation states complexes with several closed-shell metal ions like Zn2+, Cd2+ and Y3+. This complex formation can be triggered by visible light via a one-electron transfer reaction from the pyrocatechol derivative to (3CT)Ru(bpy)32+, which is thereby reduced (Schemes 1 and 2), The quenching of the triplet charge-transfer state, (3CT)Ru(bpy)32+ cannot be measured by conventional methods (Stern-Volmer plot), because the bimolecular electron-transfer rate is too slow (kq < 10-7 M-1 s-1). ESR. spectroscopy shows, however, clearly the paramagnetic reaction products. The concentration of these paramagnetic species is strongly enhanced by complex formation.The hindered rotation of the side chain in L-dopa and in its Y3+-complex is described within a two-jump model, which gives best agreement between calculated and measured spectra assuming an energy of 37 kJmol-1 for the rotational barrier.
collection_details	GBV_USEFLAG_U ZDB-1-WIS GBV_NL_ARTICLE
title_short	Photon-Triggered Complex Formation: Radical Complexes of o-Benzosemiquinone, Dopa, Dopamine and Adrenaline Formed by Electron-Transfer Reaction from Excited Tris (2,2′-bipyridyl)ruthenium (II)
url	http://dx.doi.org/10.1002/hlca.19820650627
remote_bool	true
author2	Plancherel, Dominique von Zelewsky, Alex
author2Str	Plancherel, Dominique von Zelewsky, Alex
ppnlink	NLEJ159071178
mediatype_str_mv	z
isOA_txt	false
hochschulschrift_bool	false
author2_role	oth oth
up_date	2024-07-06T06:18:58.874Z
_version_	1803809444461543424
fullrecord_marcxml	<?xml version="1.0" encoding="UTF-8"?><collection xmlns="http://www.loc.gov/MARC21/slim"><record><leader>01000caa a22002652 4500</leader><controlfield tag="001">NLEJ162645627</controlfield><controlfield tag="003">DE-627</controlfield><controlfield tag="005">20210707094451.0</controlfield><controlfield tag="007">cr uuu---uuuuu</controlfield><controlfield tag="008">070201s1982 xx \|\|\|\|\|o 00\| \|\|ger c</controlfield><datafield tag="035" ind1=" " ind2=" "><subfield code="a">(DE-627)NLEJ162645627</subfield></datafield><datafield tag="040" ind1=" " ind2=" "><subfield code="a">DE-627</subfield><subfield code="b">ger</subfield><subfield code="c">DE-627</subfield><subfield code="e">rakwb</subfield></datafield><datafield tag="041" ind1=" " ind2=" "><subfield code="a">ger</subfield></datafield><datafield tag="245" ind1="1" ind2="0"><subfield code="a">Photon-Triggered Complex Formation: Radical Complexes of o-Benzosemiquinone, Dopa, Dopamine and Adrenaline Formed by Electron-Transfer Reaction from Excited Tris (2,2′-bipyridyl)ruthenium (II)</subfield></datafield><datafield tag="264" ind1=" " ind2="1"><subfield code="c">1982</subfield></datafield><datafield tag="300" ind1=" " ind2=" "><subfield code="b">8 Ill.</subfield><subfield code="b">3 Tab.</subfield></datafield><datafield tag="300" ind1=" " ind2=" "><subfield code="a">12</subfield></datafield><datafield tag="336" ind1=" " ind2=" "><subfield code="a">nicht spezifiziert</subfield><subfield code="b">zzz</subfield><subfield code="2">rdacontent</subfield></datafield><datafield tag="337" ind1=" " ind2=" "><subfield code="a">nicht spezifiziert</subfield><subfield code="b">z</subfield><subfield code="2">rdamedia</subfield></datafield><datafield tag="338" ind1=" " ind2=" "><subfield code="a">nicht spezifiziert</subfield><subfield code="b">zu</subfield><subfield code="2">rdacarrier</subfield></datafield><datafield tag="520" ind1=" " ind2=" "><subfield code="a">The pyrocatechol derivatives, dopamine (2), adrenaline (3) and L-dopa (4) form in their semiquinoid oxidation states complexes with several closed-shell metal ions like Zn2+, Cd2+ and Y3+. This complex formation can be triggered by visible light via a one-electron transfer reaction from the pyrocatechol derivative to (3CT)Ru(bpy)32+, which is thereby reduced (Schemes 1 and 2), The quenching of the triplet charge-transfer state, (3CT)Ru(bpy)32+ cannot be measured by conventional methods (Stern-Volmer plot), because the bimolecular electron-transfer rate is too slow (kq < 10-7 M-1 s-1). ESR. spectroscopy shows, however, clearly the paramagnetic reaction products. The concentration of these paramagnetic species is strongly enhanced by complex formation.The hindered rotation of the side chain in L-dopa and in its Y3+-complex is described within a two-jump model, which gives best agreement between calculated and measured spectra assuming an energy of 37 kJmol-1 for the rotational barrier.</subfield></datafield><datafield tag="533" ind1=" " ind2=" "><subfield code="f">Wiley InterScience Backfile Collection 1832-2000</subfield></datafield><datafield tag="700" ind1="1" ind2=" "><subfield code="a">Plancherel, Dominique</subfield><subfield code="4">oth</subfield></datafield><datafield tag="700" ind1="1" ind2=" "><subfield code="a">von Zelewsky, Alex</subfield><subfield code="4">oth</subfield></datafield><datafield tag="773" ind1="0" ind2="8"><subfield code="i">in</subfield><subfield code="t">Helvetica Chimica Acta</subfield><subfield code="d">New York, NY : Wiley-VCH</subfield><subfield code="g">65(1982) vom: Juni, Seite 1929-1940</subfield><subfield code="w">(DE-627)NLEJ159071178</subfield><subfield code="w">(DE-600)1475013-2</subfield><subfield code="x">0018-019X</subfield><subfield code="7">nnns</subfield></datafield><datafield tag="773" ind1="1" ind2="8"><subfield code="g">volume:65</subfield><subfield code="g">year:1982</subfield><subfield code="g">month:06</subfield><subfield code="g">pages:1929-1940</subfield><subfield code="g">extent:12</subfield></datafield><datafield tag="856" ind1="4" ind2="0"><subfield code="u">http://dx.doi.org/10.1002/hlca.19820650627</subfield><subfield code="q">text/html</subfield><subfield code="z">Deutschlandweit zugänglich</subfield></datafield><datafield tag="912" ind1=" " ind2=" "><subfield code="a">GBV_USEFLAG_U</subfield></datafield><datafield tag="912" ind1=" " ind2=" "><subfield code="a">ZDB-1-WIS</subfield></datafield><datafield tag="912" ind1=" " ind2=" "><subfield code="a">GBV_NL_ARTICLE</subfield></datafield><datafield tag="951" ind1=" " ind2=" "><subfield code="a">AR</subfield></datafield><datafield tag="952" ind1=" " ind2=" "><subfield code="d">65</subfield><subfield code="j">1982</subfield><subfield code="c">6</subfield><subfield code="h">1929-1940</subfield><subfield code="g">12</subfield></datafield></record></collection>
score	7.4017944

Nicht das Richtige dabei?

Schreiben Sie uns!

Photon-Triggered Complex Formation: Radical Complexes of o-Benzosemiquinone, Dopa, Dopamine and Adrenaline Formed by Electron-Transfer Reaction from Excited Tris (2,2′-bipyridyl)ruthenium (II)

Nicht das Richtige dabei?

Zugang & Verfügbarkeit

Vorhandene Bände

Nicht das Richtige dabei?