Sc(III) Complexes of 1,4,7-Triazacyclononane-1,4,7-triacetic Acid and Its Monoamides

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F61388963%3A_____%2F25%3A00642018" target="_blank" >RIV/61388963:_____/25:00642018 - isvavai.cz</a>

Nalezeny alternativní kódy

RIV/00216208:11310/25:10505992

Výsledek na webu

<a href="https://doi.org/10.1021/acs.inorgchem.5c04142" target="_blank" >https://doi.org/10.1021/acs.inorgchem.5c04142</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1021/acs.inorgchem.5c04142" target="_blank" >10.1021/acs.inorgchem.5c04142</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Sc(III) Complexes of 1,4,7-Triazacyclononane-1,4,7-triacetic Acid and Its Monoamides

Popis výsledku v původním jazyce

Scandium(III) complexes with H3nota and its N-ethyl (H2 L 1) and N,N-diethyl (H2 L 2) monoamides were studied in the solid state and solution. Potentiometric measurements showed high stabilities of the binary ScIII complexes with the ligands (log K [Sc(L)] = 19.50, 16.64, and 17.94 for H3nota, H2 L 1 and H2 L,2 respectively) and weak coordination of the second ligand molecule under the ligand excess. The chemical model was confirmed by 45Sc NMR. Multinuclear NMR spectroscopy was used to study the ternary ScIII-ligand-oxalate systems. The results showed the presence of species with 2:1 and 1:1 [Sc(L)]-to-oxalate stoichiometry. Ternary complexes with the nota-monoamides form two isomers differing in the position of oxalate versus amide pendant arm. In the solid state, the [Sc(L)] complexes form oligomers interconnected through ligand carboxylate groups. Crystallization from solutions containing H2O2 or oxalate anions yielded ternary complexes. In all binary and ternary complexes, the ScIII ion is octacoordinated with the N3O4O1 coordination mode. All of the carboxylate groups of the ligands are coordinated in the O4-plane. The apical position is occupied by an oxygen atom of water, peroxide, or carboxylate anion. The apical Sc-O bonds are usually longer compared to those of the oxygen atoms forming the O4-plane.

Název v anglickém jazyce

Sc(III) Complexes of 1,4,7-Triazacyclononane-1,4,7-triacetic Acid and Its Monoamides

Popis výsledku anglicky

Scandium(III) complexes with H3nota and its N-ethyl (H2 L 1) and N,N-diethyl (H2 L 2) monoamides were studied in the solid state and solution. Potentiometric measurements showed high stabilities of the binary ScIII complexes with the ligands (log K [Sc(L)] = 19.50, 16.64, and 17.94 for H3nota, H2 L 1 and H2 L,2 respectively) and weak coordination of the second ligand molecule under the ligand excess. The chemical model was confirmed by 45Sc NMR. Multinuclear NMR spectroscopy was used to study the ternary ScIII-ligand-oxalate systems. The results showed the presence of species with 2:1 and 1:1 [Sc(L)]-to-oxalate stoichiometry. Ternary complexes with the nota-monoamides form two isomers differing in the position of oxalate versus amide pendant arm. In the solid state, the [Sc(L)] complexes form oligomers interconnected through ligand carboxylate groups. Crystallization from solutions containing H2O2 or oxalate anions yielded ternary complexes. In all binary and ternary complexes, the ScIII ion is octacoordinated with the N3O4O1 coordination mode. All of the carboxylate groups of the ligands are coordinated in the O4-plane. The apical position is occupied by an oxygen atom of water, peroxide, or carboxylate anion. The apical Sc-O bonds are usually longer compared to those of the oxygen atoms forming the O4-plane.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

10402 - Inorganic and nuclear chemistry

Projekt

<a href="/cs/project/TH78020003" target="_blank" >TH78020003: Zobrazovací a inhibiční sondy pro diagnostiku a léčení Alzheimerovy choroby</a><br>

Návaznosti

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Rok uplatnění

2025

Kód důvěrnosti údajů

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

Název periodika

Inorganic Chemistry

ISSN

0020-1669

e-ISSN

1520-510X

Svazek periodika

64

Číslo periodika v rámci svazku

46

Stát vydavatele periodika

US - Spojené státy americké

Počet stran výsledku

11

Strana od-do

22928-22938

Kód UT WoS článku

001613517200001

EID výsledku v databázi Scopus

2-s2.0-105022618947