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

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An Entity of Type : http://linked.opendata.cz/ontology/domain/vavai/Vysledek, within Data Space : linked.opendata.cz associated with source document(s)

Attributes	Values
rdf:type	skos:Concept http://linked.opendata.cz/ontology/domain/vavai/Vysledek
rdfs:seeAlso	http://dx.doi.org/10.1080/10426507.2014.904864
Description	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. In the 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 atom and the structures are stabilized by rich hydrogen bond network. 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. In the 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 atom and the structures are stabilized by rich hydrogen bond network. (en)
Title	Phosphinate Analogues of IDA and NTA with Low Basicity of Nitrogen Atom: Acid-Base and Complexation Properties Phosphinate Analogues of IDA and NTA with Low Basicity of Nitrogen Atom: Acid-Base and Complexation Properties (en)
skos:prefLabel	Phosphinate Analogues of IDA and NTA with Low Basicity of Nitrogen Atom: Acid-Base and Complexation Properties Phosphinate Analogues of IDA and NTA with Low Basicity of Nitrogen Atom: Acid-Base and Complexation Properties (en)
skos:notation	RIV/00216208:11310/14:10277905!RIV15-MSM-11310___
http://linked.open...avai/riv/aktivita	I P S Z
http://linked.open...avai/riv/aktivity	I, P(GPP207/10/P153), P(LD13012), S, Z(MSM0021620857)
http://linked.open...iv/cisloPeriodika	7-8
http://linked.open...vai/riv/dodaniDat	2015
http://linked.open...aciTvurceVysledku	Böhmová, Zuzana Procházková, Soňa Kotek, Jan Lukeš, Ivan Hermann, Petr Kubíček, Vojtěch
http://linked.open.../riv/druhVysledku	J - Článek v odborném periodiku
http://linked.open...iv/duvernostUdaju	S - Úplné a pravdivé údaje nepodléhající ochraně podle zvláštních právních předpisů
http://linked.open...titaPredkladatele	Univerzita Karlova v Praze / Přírodovědecká fakulta
http://linked.open...dnocenehoVysledku	36460
http://linked.open...ai/riv/idVysledku	RIV/00216208:11310/14:10277905
http://linked.open...riv/jazykVysledku	eng - angličtina
http://linked.open.../riv/klicovaSlova	potentiometry; complex stability; dissociation constant; phosphinic acid; aminophosphinate (en)
http://linked.open.../riv/klicoveSlovo	aminophosphinate complex stability potentiometry phosphinic acid dissociation constant
http://linked.open...odStatuVydavatele	GB - Spojené království Velké Británie a Severního Irska
http://linked.open...ontrolniKodProRIV	[7FC7407DF488]
http://linked.open...i/riv/nazevZdroje	Phosphorus, Sulfur and Silicon and the Related Elements
http://linked.open...in/vavai/riv/obor	CA
http://linked.open...ichTvurcuVysledku	6 (xsd:int)
http://linked.open...cetTvurcuVysledku	6 (xsd:int)
http://linked.open...vavai/riv/projekt	Geminal diphosphinates – a route to improved complexation rates of macrocyclic ligands for biomedical applications Ligands for complexation of lanthanides
http://linked.open...UplatneniVysledku	2014
http://linked.open...v/svazekPeriodika	189
http://linked.open...iv/tvurceVysledku	Hermann, Petr Kotek, Jan Kubíček, Vojtěch Lukeš, Ivan Procházková, Soňa Böhmová, Zuzana
http://linked.open...ain/vavai/riv/wos	000341577500010
http://linked.open...n/vavai/riv/zamer	Nové molekulární systémy pro pokročilé aplikace prospěšné pro zdraví a šetrné k životnímu prostředí
issn	1042-6507
number of pages	13 (xsd:int)
http://bibframe.org/vocab/doi	10.1080/10426507.2014.904864
http://localhost/t...ganizacniJednotka	11310

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