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Statements

Subject Item
n2:RIV%2F00216224%3A14310%2F06%3A00016337%21RIV10-GA0-14310___
rdf:type
n9:Vysledek skos:Concept
dcterms:description
Divalent metal complexes of macrocyclic ligand 1,4,8,11-tetraazacyclotetradecane-1,8-bis( methylphosphonic acid)) (1,8-H(4)te2p, H4L) were investigated in solution and in the solid state. The majority of transition-metal ions form thermodynamically very stable complexes as a consequence of high affinity for the nitrogen atoms of the ring. On the other hand, complexes with Mn2+, Pb2+ and alkaline earth ions interacting mainly with phosphonate oxygen atoms are much weaker than those of transition-metal ions and are formed only at higher pH. The same tendency is seen in the solid state. Zinc(II) ion in the octahedraltrans-O,O-[Zn(H2L)] complex is fully encapsulated within the macrocycle (N4O2 coordination mode with protonated phosphonate oxygen atoms). The polymeric {[Pb(H2L)(H2O)(2)] center dot 6H(2)O}(n) complex has double-protonated secondary amino groups and the central atom is bound only to the phosphonate oxygen atoms. The phosphonate moieties bridge lead atoms creating a 3D-polymeric network. Divalent metal complexes of macrocyclic ligand 1,4,8,11-tetraazacyclotetradecane-1,8-bis( methylphosphonic acid)) (1,8-H(4)te2p, H4L) were investigated in solution and in the solid state. The majority of transition-metal ions form thermodynamically very stable complexes as a consequence of high affinity for the nitrogen atoms of the ring. On the other hand, complexes with Mn2+, Pb2+ and alkaline earth ions interacting mainly with phosphonate oxygen atoms are much weaker than those of transition-metal ions and are formed only at higher pH. The same tendency is seen in the solid state. Zinc(II) ion in the octahedraltrans-O,O-[Zn(H2L)] complex is fully encapsulated within the macrocycle (N4O2 coordination mode with protonated phosphonate oxygen atoms). The polymeric {[Pb(H2L)(H2O)(2)] center dot 6H(2)O}(n) complex has double-protonated secondary amino groups and the central atom is bound only to the phosphonate oxygen atoms. The phosphonate moieties bridge lead atoms creating a 3D-polymeric network.
dcterms:title
Thermodynamic, kinetic and solid-state study of divalent metal complexes of 1,4,8,11-tetraazacyclotetradecane (cyclam) bearing two trans (1,8-)methylphosphonic acid pendant arms Thermodynamic, kinetic and solid-state study of divalent metal complexes of 1,4,8,11-tetraazacyclotetradecane (cyclam) bearing two trans (1,8-)methylphosphonic acid pendant arms
skos:prefLabel
Thermodynamic, kinetic and solid-state study of divalent metal complexes of 1,4,8,11-tetraazacyclotetradecane (cyclam) bearing two trans (1,8-)methylphosphonic acid pendant arms Thermodynamic, kinetic and solid-state study of divalent metal complexes of 1,4,8,11-tetraazacyclotetradecane (cyclam) bearing two trans (1,8-)methylphosphonic acid pendant arms
skos:notation
RIV/00216224:14310/06:00016337!RIV10-GA0-14310___
n3:aktivita
n15:P
n3:aktivity
P(GA203/03/0168), P(GA203/06/0467)
n3:cisloPeriodika
49
n3:dodaniDat
n14:2010
n3:domaciTvurceVysledku
n7:3062228 n7:9007563 n7:3978877
n3:druhVysledku
n13:J
n3:duvernostUdaju
n11:S
n3:entitaPredkladatele
n8:predkladatel
n3:idSjednocenehoVysledku
503782
n3:idVysledku
RIV/00216224:14310/06:00016337
n3:jazykVysledku
n18:eng
n3:klicovaSlova
CAMBRIDGE STRUCTURAL DATABASE; CRYSTAL-STRUCTURES; MACROCYCLIC LIGANDS; COPPER(II) COMPLEXES; LEAD(II) DIPHOSPHONATES; HYDROTHERMAL SYNTHESES; DISSOCIATION KINETICS; LANTHANIDE COMPLEXES; CIS/TRANS-ISOMERISM; AQUEOUS-SOLUTIONS
n3:klicoveSlovo
n6:AQUEOUS-SOLUTIONS n6:HYDROTHERMAL%20SYNTHESES n6:LANTHANIDE%20COMPLEXES n6:LEAD%28II%29%20DIPHOSPHONATES n6:COPPER%28II%29%20COMPLEXES n6:DISSOCIATION%20KINETICS n6:CIS%2FTRANS-ISOMERISM n6:CRYSTAL-STRUCTURES n6:CAMBRIDGE%20STRUCTURAL%20DATABASE n6:MACROCYCLIC%20LIGANDS
n3:kodStatuVydavatele
GB - Spojené království Velké Británie a Severního Irska
n3:kontrolniKodProRIV
[980350BD26B3]
n3:nazevZdroje
Dalton transactions : an international journal of inorganic chemistry
n3:obor
n10:CA
n3:pocetDomacichTvurcuVysledku
3
n3:pocetTvurcuVysledku
7
n3:projekt
n4:GA203%2F03%2F0168 n4:GA203%2F06%2F0467
n3:rokUplatneniVysledku
n14:2006
n3:svazekPeriodika
xx
n3:tvurceVysledku
Lubal, Přemysl Plutnar, Jan Hermann, Petr Svobodová, Ivona Lukeš, Ivan Kotek, Jan Havlíčková, Jana
n3:wos
000241679500012
s:issn
1477-9226
s:numberOfPages
14
n17:organizacniJednotka
14310