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Statements

Subject Item
n2:RIV%2F00216224%3A14310%2F13%3A00066862%21RIV14-MSM-14310___
rdf:type
n13:Vysledek skos:Concept
rdfs:seeAlso
http://www.sciencedirect.com/science/article/pii/S0277538713005111#
dcterms: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.
dcterms: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
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
skos:notation
RIV/00216224:14310/13:00066862!RIV14-MSM-14310___
n13:predkladatel
n21:orjk%3A14310
n3:aktivita
n9:S n9:P
n3:aktivity
P(GA13-08336S), P(ME09065), S
n3:cisloPeriodika
OCT 7 2013
n3:dodaniDat
n17:2014
n3:domaciTvurceVysledku
n5:9510028 n5:9007563
n3:druhVysledku
n10:J
n3:duvernostUdaju
n19:S
n3:entitaPredkladatele
n15:predkladatel
n3:idSjednocenehoVysledku
82656
n3:idVysledku
RIV/00216224:14310/13:00066862
n3:jazykVysledku
n11:eng
n3:klicovaSlova
Macrocyclic ligands; Cyclen derivatives; Thiol group; Copper/zinc complexes; Formation/dissociation kinetics; Rate constants; Radiopharmaceuticals
n3:klicoveSlovo
n4:Macrocyclic%20ligands n4:Thiol%20group n4:Cyclen%20derivatives n4:Radiopharmaceuticals n4:Copper%2Fzinc%20complexes n4:Rate%20constants n4:Formation%2Fdissociation%20kinetics
n3:kodStatuVydavatele
GB - Spojené království Velké Británie a Severního Irska
n3:kontrolniKodProRIV
[D8A2845D1CF9]
n3:nazevZdroje
Polyhedron
n3:obor
n12:CA
n3:pocetDomacichTvurcuVysledku
2
n3:pocetTvurcuVysledku
4
n3:projekt
n8:GA13-08336S n8:ME09065
n3:rokUplatneniVysledku
n17:2013
n3:svazekPeriodika
62
n3:tvurceVysledku
Campello, Maria Paula Cabral Santos, Isabel Lubal, Přemysl Ševčíková, Romana
n3:wos
000324226200032
s:issn
0277-5387
s:numberOfPages
6
n20:doi
10.1016/j.poly.2013.06.052
n14:organizacniJednotka
14310