Toxic metal complexes of macrocyclic cyclen molecule - synthesis, structure and complexing properties

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216208%3A11310%2F17%3A10360085" target="_blank" >RIV/00216208:11310/17:10360085 - isvavai.cz</a>

Výsledek na webu

<a href="https://doi.org/10.1080/00958972.2017.1305493" target="_blank" >https://doi.org/10.1080/00958972.2017.1305493</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1080/00958972.2017.1305493" target="_blank" >10.1080/00958972.2017.1305493</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Toxic metal complexes of macrocyclic cyclen molecule - synthesis, structure and complexing properties

Popis výsledku v původním jazyce

Toxic metal (Cd2+, Hg2+, Pb2+, and Ag+) complexes with the tetradentate macrocyclic ligand - cyclen (1,4,7,10-tetraazacyclododecane, [12]aneN(4), L) were prepared and studied in the solid state by IR, X-ray diffraction, elemental and thermal analysis. Diffraction results have yielded three molecular structures, [Cd([12]ane-N-4(1,4,7,10))(NO3)(2))] (1), [Hg([12]ane-N-4(1,4,7,10))(NO3-O-2,O&apos;)]NO3 (2), [Pb-2([12]ane-N-4(1,4,7,10))(2)][Pb(NO3)(6)] (3) and one polymeric structure {[Ag-2([12]ane-N-3(1,4,7))((2)-[12]aneN(10))](NO3)(2).2H(2)O)}(n) (4) featuring a unique coordination mode not observed before with cyclen as a ligand. The monodentate (1) and chelate (with small bite angle 50.3(3)degrees, (2) coordination modes of nitrate ligands were confirmed. Stereochemically active 6s(2) lone pair was suggested in 3 and DFT results confirmed no significant metal-metal covalent bond. The stability constants of the complexes with Cd2+ and Pb2+ ions were determined by potentiometric methods in aqueous solutions. Additionally, the structures of complexes in solution were observed by H-1 NMR. Both methods confirm similar cyclen complexing properties toward Zn2+ biometal and Cd2+, Pb2+ toxic metals.

Název v anglickém jazyce

Toxic metal complexes of macrocyclic cyclen molecule - synthesis, structure and complexing properties

Popis výsledku anglicky

Toxic metal (Cd2+, Hg2+, Pb2+, and Ag+) complexes with the tetradentate macrocyclic ligand - cyclen (1,4,7,10-tetraazacyclododecane, [12]aneN(4), L) were prepared and studied in the solid state by IR, X-ray diffraction, elemental and thermal analysis. Diffraction results have yielded three molecular structures, [Cd([12]ane-N-4(1,4,7,10))(NO3)(2))] (1), [Hg([12]ane-N-4(1,4,7,10))(NO3-O-2,O&apos;)]NO3 (2), [Pb-2([12]ane-N-4(1,4,7,10))(2)][Pb(NO3)(6)] (3) and one polymeric structure {[Ag-2([12]ane-N-3(1,4,7))((2)-[12]aneN(10))](NO3)(2).2H(2)O)}(n) (4) featuring a unique coordination mode not observed before with cyclen as a ligand. The monodentate (1) and chelate (with small bite angle 50.3(3)degrees, (2) coordination modes of nitrate ligands were confirmed. Stereochemically active 6s(2) lone pair was suggested in 3 and DFT results confirmed no significant metal-metal covalent bond. The stability constants of the complexes with Cd2+ and Pb2+ ions were determined by potentiometric methods in aqueous solutions. Additionally, the structures of complexes in solution were observed by H-1 NMR. Both methods confirm similar cyclen complexing properties toward Zn2+ biometal and Cd2+, Pb2+ toxic metals.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

10402 - Inorganic and nuclear chemistry

Projekt

—

Návaznosti

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Rok uplatnění

2017

Kód důvěrnosti údajů

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

Název periodika

Journal of Coordination Chemistry

ISSN

0095-8972

e-ISSN

—

Svazek periodika

70

Číslo periodika v rámci svazku

10

Stát vydavatele periodika

GB - Spojené království Velké Británie a Severního Irska

Počet stran výsledku

15

Strana od-do

1698-1712

Kód UT WoS článku

000401250400006

EID výsledku v databázi Scopus

2-s2.0-85016116716