Phosphinate Analogues of IDA and NTA with Low Basicity of Nitrogen Atom: Acid-Base and Complexation Properties

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216208%3A11310%2F14%3A10277905" target="_blank" >RIV/00216208:11310/14:10277905 - isvavai.cz</a>

Výsledek na webu

<a href="http://dx.doi.org/10.1080/10426507.2014.904864" target="_blank" >http://dx.doi.org/10.1080/10426507.2014.904864</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1080/10426507.2014.904864" target="_blank" >10.1080/10426507.2014.904864</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Phosphinate Analogues of IDA and NTA with Low Basicity of Nitrogen Atom: Acid-Base and Complexation Properties

Popis výsledku v původním jazyce

Analogues of iminodiacetic acid (H2IDA) and nitrilotriacetic acid (H3NTA) bearing two (hydroxomethyl) methylphosphinate or (2-carboxyethyl) methylphosphinate groups were synthesized. Their acid-base and coordination properties with divalent metal ions (Cu2+, Ni2+ and Zn2+) were studied by potentiometry. The compounds exhibit very low basicity of the amino groups (pK(a) = 6.2-7.6) due to presence of two electron-withdrawing methylphosphinate groups and, consequently, a low stability of the complexes. Inthe case of IDA-analogues, the low complex stability results in precipitation of metal hydroxides in neutral region. As expected, NTA-analogues form more stable complexes and, thus, they were also studied in the alkaline region. Presence of additional carboxylate in the 2-carboxyethylphosphinic acid groups results in the formation of dinuclear complexes. Solid-state structures of two compounds were determined by X-ray diffraction analysis. The compounds are protonated on the nitrogen ato

Název v anglickém jazyce

Phosphinate Analogues of IDA and NTA with Low Basicity of Nitrogen Atom: Acid-Base and Complexation Properties

Popis výsledku anglicky

Analogues of iminodiacetic acid (H2IDA) and nitrilotriacetic acid (H3NTA) bearing two (hydroxomethyl) methylphosphinate or (2-carboxyethyl) methylphosphinate groups were synthesized. Their acid-base and coordination properties with divalent metal ions (Cu2+, Ni2+ and Zn2+) were studied by potentiometry. The compounds exhibit very low basicity of the amino groups (pK(a) = 6.2-7.6) due to presence of two electron-withdrawing methylphosphinate groups and, consequently, a low stability of the complexes. Inthe case of IDA-analogues, the low complex stability results in precipitation of metal hydroxides in neutral region. As expected, NTA-analogues form more stable complexes and, thus, they were also studied in the alkaline region. Presence of additional carboxylate in the 2-carboxyethylphosphinic acid groups results in the formation of dinuclear complexes. Solid-state structures of two compounds were determined by X-ray diffraction analysis. The compounds are protonated on the nitrogen ato

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<br>I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Rok uplatnění

2014

Kód důvěrnosti údajů

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

Název periodika

Phosphorus, Sulfur and Silicon and the Related Elements

ISSN

1042-6507

e-ISSN

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Svazek periodika

189

Číslo periodika v rámci svazku

7-8

Stát vydavatele periodika

GB - Spojené království Velké Británie a Severního Irska

Počet stran výsledku

13

Strana od-do

933-945

Kód UT WoS článku

000341577500010

EID výsledku v databázi Scopus

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