About: Kinetic study of formation/dissociation of Cu(II) and Zn(II) complexes of cyclen macrocyclic ligand with pendant thiol group

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About: Kinetic study of formation/dissociation of Cu(II) and Zn(II) complexes of cyclen macrocyclic ligand with pendant thiol group Goto Sponge NotDistinct Permalink

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rdf:type	skos:Concept http://linked.opendata.cz/ontology/domain/vavai/Vysledek
rdfs:seeAlso	http://www.sciencedirect.com/science/article/pii/S0277538713005111#
Description	The kinetic properties of macrocyclic ligand 2-[1,4,7,10-tetraazacyclododecane-1-yl]-ethanethiol (L1, DOSH) were studied with Cu(II) and Zn(II) metal ions, using conventional molecular absorption spectroscopy in pH regions 2.5-4.7 and 4.3-6.0 for Cu(II) and Zn(II), respectively. The obtained partial rate constants, measured at 25 degrees C and ionic strength I = 0.1 M (KCl), are slightly lower than for parent cyclen (1,4,7,10-tetraazacyclododecane) macrocyclic ligand supporting the hypothesis that the thiol pendant arm is not directly involved in the formation of these metal complexes. The study of the dissociation of the copper(II)-L1 complex in the presence of perchloric acid and at higher temperatures (75-95 degrees C) showed that this complex is more kinetically inert than the copper(II) complex with cyclen, indicating that the presence of the thiol pendant arm plays a key role as protecting group of copper(II) ion. The kinetic properties of macrocyclic ligand 2-[1,4,7,10-tetraazacyclododecane-1-yl]-ethanethiol (L1, DOSH) were studied with Cu(II) and Zn(II) metal ions, using conventional molecular absorption spectroscopy in pH regions 2.5-4.7 and 4.3-6.0 for Cu(II) and Zn(II), respectively. The obtained partial rate constants, measured at 25 degrees C and ionic strength I = 0.1 M (KCl), are slightly lower than for parent cyclen (1,4,7,10-tetraazacyclododecane) macrocyclic ligand supporting the hypothesis that the thiol pendant arm is not directly involved in the formation of these metal complexes. The study of the dissociation of the copper(II)-L1 complex in the presence of perchloric acid and at higher temperatures (75-95 degrees C) showed that this complex is more kinetically inert than the copper(II) complex with cyclen, indicating that the presence of the thiol pendant arm plays a key role as protecting group of copper(II) ion. (en)
Title	Kinetic study of formation/dissociation of Cu(II) and Zn(II) complexes of cyclen macrocyclic ligand with pendant thiol group Kinetic study of formation/dissociation of Cu(II) and Zn(II) complexes of cyclen macrocyclic ligand with pendant thiol group (en)
skos:prefLabel	Kinetic study of formation/dissociation of Cu(II) and Zn(II) complexes of cyclen macrocyclic ligand with pendant thiol group Kinetic study of formation/dissociation of Cu(II) and Zn(II) complexes of cyclen macrocyclic ligand with pendant thiol group (en)
skos:notation	RIV/00216224:14310/13:00066862!RIV14-MSM-14310___
http://linked.open...avai/riv/aktivita	P S
http://linked.open...avai/riv/aktivity	P(GA13-08336S), P(ME09065), S
http://linked.open...iv/cisloPeriodika	OCT 7 2013
http://linked.open...vai/riv/dodaniDat	2014
http://linked.open...aciTvurceVysledku	Lubal, Přemysl Ševčíková, Romana
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	Masarykova univerzita / Přírodovědecká fakulta
http://linked.open...dnocenehoVysledku	82656
http://linked.open...ai/riv/idVysledku	RIV/00216224:14310/13:00066862
http://linked.open...riv/jazykVysledku	eng - angličtina
http://linked.open.../riv/klicovaSlova	Macrocyclic ligands; Cyclen derivatives; Thiol group; Copper/zinc complexes; Formation/dissociation kinetics; Rate constants; Radiopharmaceuticals (en)
http://linked.open.../riv/klicoveSlovo	Cyclen derivatives Macrocyclic ligands Rate constants Radiopharmaceuticals Copper/zinc complexes Formation/dissociation kinetics Thiol group
http://linked.open...odStatuVydavatele	GB - Spojené království Velké Británie a Severního Irska
http://linked.open...ontrolniKodProRIV	[D8A2845D1CF9]
http://linked.open...i/riv/nazevZdroje	Polyhedron
http://linked.open...in/vavai/riv/obor	CA
http://linked.open...ichTvurcuVysledku	2 (xsd:int)
http://linked.open...cetTvurcuVysledku	4 (xsd:int)
http://linked.open...vavai/riv/projekt	Hybridní materiály založené na makrocyklických ligandech pro využití v medicíně Research of new detection systems based on sensor arrays for application in speciation analysis
http://linked.open...UplatneniVysledku	2013
http://linked.open...v/svazekPeriodika	62
http://linked.open...iv/tvurceVysledku	Lubal, Přemysl Santos, Isabel Ševčíková, Romana Campello, Maria Paula Cabral
http://linked.open...ain/vavai/riv/wos	000324226200032
issn	0277-5387
number of pages	6 (xsd:int)
http://bibframe.org/vocab/doi	10.1016/j.poly.2013.06.052
http://localhost/t...ganizacniJednotka	14310

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