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Titolo:
Metal(II) binding ability of a novel N-protected amino acid. A solution-state investigation on binary and ternary complexes with 2,2 '-bipyridine
Autore:
Saladini, M; Iacopino, D; Menabue, L;
Indirizzi:
Univ Modena & Reggio Emilia, Dept Chem, I-41100 Modena, Italy Univ Modena & Reggio Emilia Modena Italy I-41100 , I-41100 Modena, Italy
Titolo Testata:
JOURNAL OF INORGANIC BIOCHEMISTRY
fascicolo: 4, volume: 78, anno: 2000,
pagine: 355 - 361
SICI:
0162-0134(200003)78:4<355:MBAOAN>2.0.ZU;2-C
Fonte:
ISI
Lingua:
ENG
Soggetto:
AMIDE NITROGEN; SOLID-STATE; COORDINATION; SYSTEMS; ION; STABILITY; BEHAVIOR;
Keywords:
binding ability; amino acid; 2,2 '-bipyridine complexes; stability constants; potentiometric study;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Life Sciences
Physical, Chemical & Earth Sciences
Citazioni:
22
Recensione:
Indirizzi per estratti:
Indirizzo: Saladini, M Univ Modena & Reggio Emilia, Dept Chem, Via Campi 183, I-41100Modena, Italy Univ Modena & Reggio Emilia Via Campi 183 Modena Italy I-41100
Citazione:
M. Saladini et al., "Metal(II) binding ability of a novel N-protected amino acid. A solution-state investigation on binary and ternary complexes with 2,2 '-bipyridine", J INORG BIO, 78(4), 2000, pp. 355-361

Abstract

The binary and ternary systems 2,2'-bipyridine (bpy)-M(II)-NO(2)psglyH(2) (M(II) =Mn(II), Co(II), Ni(II), Cu(II), Zn(II), Cd(II), Pb(II); NO(2)psglyH(2) =N-(2-nitrophenylsulfonyl)glycine) were investigated in aqueous solution by means of potentiometry and electron spectroscopy in order to identify the type, number and stability of the complex species as a function of pH and metal-to-ligand molar ratio. The aim is to evaluate the effect of a substituent on the phenyl ring of the N-sulfonyl amino acids on their coordination properties. The prevailing species in the binary systems is the [ML] (M=Co(II), Ni(II), Cu(II), Cd(II), Pb(II)) where the amino acid molecule is in the dianionic form and coordinates the metal ion through both carboxylic oxygen and deprotonated sulfonamidic nitrogen, while in the Mn(II) and Zn(II)-containing binary system the only complex species found are those with the amino acid in the monoanionic form. In the ternary 2,2'-bipyridine-containing systems the chelating coordination mode of the dianionic amino acid is maintained with M(II) = Co(n),Ni(II), cu(n), Cd(II), Pb(II) and the addition of the aromatic base also enables the Zn(II) ion to substitute for the sulfonamide nitrogen-bound hydrogen of NO(2)psglyH(2). (C) 2000 Elsevier Science Inc. All rights reserved.

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Documento generato il 29/11/20 alle ore 18:25:53