Mn(2+) complexes of 1-oxa-4,7-diazacyclononane based ligands with acetic, phosphonic and phosphinic acid pendant arms: Stability and relaxation studies

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216208%3A11310%2F11%3A10104182" target="_blank" >RIV/00216208:11310/11:10104182 - isvavai.cz</a>

Výsledek na webu

<a href="http://dx.doi.org/10.1039/c1dt10543d" target="_blank" >http://dx.doi.org/10.1039/c1dt10543d</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1039/c1dt10543d" target="_blank" >10.1039/c1dt10543d</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Mn(2+) complexes of 1-oxa-4,7-diazacyclononane based ligands with acetic, phosphonic and phosphinic acid pendant arms: Stability and relaxation studies

Popis výsledku v původním jazyce

A new class of macrocyclic ligands based on 1-oxa-4,7-diazacyclononane was synthesized and their Mn2+ complexes were investigated with respect to stability and relaxation properties. Each ligand has two pendant arms involving carboxylic, phosphonic, phosphinic or phenylphosphinic acid moieties. The crystal structure of the Mn2+ complex with H2L4 confirmed a coordination number of 6 for Mn2+. The protonation constants of all ligands and the stability constants of their complexes with Mn2+ and some biologically or biomedically relevant metal ions were determined by potentiometry and NMR. Variable temperature 1HNMRD and 17O NMR measurements have been performed on MnL1 and MnL2 to provide information on water exchange and rotational dynamics. The 17O chemical shifts indicate hydration equilibrium between mono- and bishydrated species for MnL1, while MnL2 is monohydrated. Small endogenous anions (phosphate, carbonate, citrate) do not replace the coordinated water in either of the complexes,

Název v anglickém jazyce

Mn(2+) complexes of 1-oxa-4,7-diazacyclononane based ligands with acetic, phosphonic and phosphinic acid pendant arms: Stability and relaxation studies

Popis výsledku anglicky

A new class of macrocyclic ligands based on 1-oxa-4,7-diazacyclononane was synthesized and their Mn2+ complexes were investigated with respect to stability and relaxation properties. Each ligand has two pendant arms involving carboxylic, phosphonic, phosphinic or phenylphosphinic acid moieties. The crystal structure of the Mn2+ complex with H2L4 confirmed a coordination number of 6 for Mn2+. The protonation constants of all ligands and the stability constants of their complexes with Mn2+ and some biologically or biomedically relevant metal ions were determined by potentiometry and NMR. Variable temperature 1HNMRD and 17O NMR measurements have been performed on MnL1 and MnL2 to provide information on water exchange and rotational dynamics. The 17O chemical shifts indicate hydration equilibrium between mono- and bishydrated species for MnL1, while MnL2 is monohydrated. Small endogenous anions (phosphate, carbonate, citrate) do not replace the coordinated water in either of the complexes,

Druh

J_x - Nezařazeno - Článek v odborném periodiku (Jimp, Jsc a Jost)

CEP obor

CA - Anorganická chemie

OECD FORD obor

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Projekt

Výsledek vznikl pri realizaci vícero projektů. Více informací v záložce Projekty.

Návaznosti

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)<br>Z - Vyzkumny zamer (s odkazem do CEZ)<br>S - Specificky vyzkum na vysokych skolach

Rok uplatnění

2011

Kód důvěrnosti údajů

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Název periodika

Dalton Transactions

ISSN

1477-9226

e-ISSN

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Svazek periodika

40

Číslo periodika v rámci svazku

39

Stát vydavatele periodika

GB - Spojené království Velké Británie a Severního Irska

Počet stran výsledku

16

Strana od-do

10131-10146

Kód UT WoS článku

000295843100023

EID výsledku v databázi Scopus

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