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1.

001-es BibID:BIBFORM084877
Első szerző:Bouhsina, Saad
Cím:Formation of oligonuclear complexes between copper(II) and 1-hydroxyethane-1,1-diphosphonic acid / Saad Bouhsina, Péter Buglyó, Edmond Abi Aad, Antoine Aboukais, Tamás Kiss
Dátum:2004
ISSN:0020-1693
Megjegyzések:The complex formation between Cu(II) and 1-hydroxyethane-1,1-diphosphonic acid was studied by means of pH-potentiometry and spectroscopy (UV-Vis and EPR). Speciation revealed the formation of a trinuclear complex [Cu3A3]6 besides the mononuclear 1:1 and 1:2 species. In the complex [Cu3A3]6, which is not formed with other diphosphonic derivatives, the ligands adopt chelating and bridging modes via the four O atoms of the two phosphonates, the alcoholic-OH groups remaining in the protonated form.
Tárgyszavak:Természettudományok Kémiai tudományok idegen nyelvű folyóiratközlemény külföldi lapban
folyóiratcikk
Megjelenés:Inorganica Chimica Acta. - 357 : 1 (2004), p. 305-310. -
További szerzők:Buglyó Péter (1965-) (vegyész) Abi Aad, Edmond Aboukais, Antoine Kiss Tamás
Pályázati támogatás:OTKA T37385
OTKA
OTKA T31896
OTKA
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2.

001-es BibID:BIBFORM087717
Első szerző:Buglyó Péter (vegyész)
Cím:Speciation and NMR relaxation studies of VO(IV) complexes with several O-donor containing ligands: oxalate, malonate, maltolate and kojate / Péter Buglyó, Erzsébet Kiss, István Fábián, Tamás Kiss, Daniele Sanna, Eugenio Garribba, Giovanni Micera
Dátum:2000
ISSN:0020-1693
Megjegyzések:Potentiometric, spectral and 1H NMR relaxation studies are reported on the complex formation of VO(IV) with the bidentate chelating ligands oxalic and malonic acids, of a dicarboxylic nature, and maltol and kojic acid, of the hydroxy-4-pyrone type. Complexes with stochiometries VOA and VOA2 were characterised in aqueous solution. Two main features were established for the complex systems. It was found that five-membered ring chelation favours the cis arrangement in the bis complexes of maltol and kojic acid to a higher extent than in those of oxalic and malonic acids. Moreover, previous investigations of VO(IV) binding to maltol or its analogues did not consider the formation of hydroxo species. Formation of dihydroxo bridged dimeric complexes of stoichiometry (VOAH?1)2 and monomeric hydroxo species VOA2H?1 or VOA2(OH), are now taken into account in order to explain the equilibrium and spectroscopic results. 1H NMR relaxation measurements strongly suggest an equilibrium between the two isomers of the bis complexes.
Tárgyszavak:Természettudományok Kémiai tudományok idegen nyelvű folyóiratközlemény külföldi lapban
folyóiratcikk
Vanadium complexes
Oxo complexes
Oxalate complexes
Malonate complexes
Maltolate complexes
Megjelenés:Inorganica Chimica Acta. - 306 : 2 (2000), p. 174-183. -
További szerzők:Kiss Erzsébet (vegyész) Fábián István (1956-) (vegyész) Kiss Tamás Sanna, Daniele (1956-) (vegyész) Garribba, Eugenio Micera, Giovanni
Pályázati támogatás:T 23776
OTKA
T 29568
OTKA
T 28244
OTKA
FKFP 0013/97
Egyéb
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3.

001-es BibID:BIBFORM078704
Első szerző:Buglyó Péter (vegyész)
Cím:Tuning the redox potentials of ternary cobalt(III) complexes containing various hydroxamates / Buglyó Péter, Kacsir István, Kozsup Máté, Nagy Imre, Nagy Sándor, Bényei Attila Csaba, Kováts Éva, Farkas Etelka
Dátum:2018
ISSN:0020-1693
Megjegyzések:Sixteen cobalt(III) complexes incorporating one of the investigated 4N donor tripodal amines in the presence or absence of differently substituted hydroxamates have been synthesized and the effect of the nature of the N-donor, size of the chelates formed and the effect of the type of the substituent(s) at the hydroxamate moiety on the redox properties of the complexes have been studied. The crystal and molecular structures of the new complexes, [Co(unspenp)(H2O)Cl]Cl2.H2O (4), [Co(tren)(phebha)](ClO4)2 (11), [Co(tpa)(bha)](ClO4)2?C2H5OH?H2O (15) and [Co(tpa)(phebha)](ClO4)2 (16) have also been determined by single crystal X-ray diffraction method. Cyclic voltammetric (CV) results indicated the irreversible reduction of Co(III) in all the investigated complexes. Out of the four studied tripodal amines, abap was found to decrease the Co(III/II) reduction potential far below the region of bioreductants. Decreasing of two of the chains by one CH2 in tren compared to abap resulted in less negative reduction potential of the corresponding complex. Further positive shift was observed by introducing two (uns-penp), and especially three (tpa) ?-back-bonding pyridyl rings into the chains of tetramines. In agreement with literature results, the 3+ oxidation state of the central cobalt ion was found to be extremely stabilized in the ternary complexes containing the doubly deprotonated benzohydroximate, but the metal ion is significantly more reducible in the ternary complexes with mono-deprotonated benzohydroxamate/derivative ligands. Measurable effect was not found on the redox potential via introduction of chloro or nitro substituents in para position into the phenyl moiety of bha? (Cl-bha? and NO2-bha? ). Significant positive shift (ca. 200 mV) was obtained, however, when RN = H was replaced by a phenyl ring in phebha? therefore complexes with this latter ligand can be likely candidates for the in vitro releasing of hydroxamates with proven biological activity.
Tárgyszavak:Természettudományok Kémiai tudományok idegen nyelvű folyóiratközlemény külföldi lapban
Megjelenés:Inorganica Chimica Acta. - 472 (2018), p. 234-242. -
További szerzők:Kacsir István (1994-) (vegyész) Kozsup Máté (1992-) (Okleveles vegyész) Nagy Imre (1992-) (vegyész analitikus) Nagy Sándor (1993-) (vegyész) Bényei Attila (1962-) (vegyész) Kováts Éva (1977-) (vegyész) Farkas Etelka (1948-) (vegyész)
Pályázati támogatás:GINOP-2.3.2-15-2016-00008
GINOP
OTKA-112317
OTKA
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4.

001-es BibID:BIBFORM085976
Első szerző:Farkas Etelka (vegyész)
Cím:Factors affecting the metal ion-hydroxamate interactions: effect of the position of the peptide function in the connecting chain on the Fe(III), Mo(VI) and V(V) complexation of some new desferrioxamine B (DFB) model dihydroxamic acids / Etelka Farkas, Péter Buglyó, Éva A. Enyedy, Veronika A. Gerlei, Amelia M. Santos
Dátum:2002
ISSN:0020-1693
Megjegyzések:Three new dihydroxamic acids (HO(CH3)NCO (CH2) x CO NH (CH2) y CON(CH3)OH, where the related x and y values are as follows: 2,5; 3,4 and 3,3) with different length of the connecting chains containing the peptide group in different positions between the two functional groups were synthesized and their complexation with Fe(III), Mo(VI) and V(V) were studied by pH-potentiometric and spectrophotometric methods. Both the structure and length of the connecting chain in the 2,5-dihydroxamic acid (2,5-DIHA) are the same as those in the natural siderophore, desferrioxamine B (DFB). Although the stability of the monochelated complexes formed with all three dihydroxamic acids are similar, 2,5-DIHA forms significantly more stable bis-chelated complexes than the other two ligands with the three metal ions studied. The results support the hypothesis that the arrangement of the two chelating functions in 2,5-DIHA is in a proper preorganization for the coordination in octahedral complexes to metal ions having similar ionic radius as iron(III) has.
Tárgyszavak:Természettudományok Kémiai tudományok idegen nyelvű folyóiratközlemény külföldi lapban
folyóiratcikk
Dihydroxamic acids
Fe(III)
Mo(VI) and V(V) complexes
Desferrioxamine B models
Megjelenés:Inorganica Chimica Acta. - 339 (2002), p. 215-223. -
További szerzők:Buglyó Péter (1965-) (vegyész) Enyedy Éva Anna (1975-) (vegyész) Gerlei Veronika A. Santos, Amelia M.
Pályázati támogatás:T034674
OTKA
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5.

001-es BibID:BIBFORM084879
Első szerző:Farkas Etelka (vegyész)
Cím:Factors affecting the metal ion-hydroxamate interactions II: effect of the length of the connecting chain on the Fe(III), Mo(VI) and V(V) complexation of some new desferrioxamine B (DFB) model dihydroxamic acids / Farkas Etelka, Buglyó Péter, Enyedy Éva A., M. Amelia Santos
Dátum:2004
ISSN:0020-1693
Megjegyzések:Three new dihydroxamic acids (HO(CH3)NCO?(CH2)2?CO?NH?(CH2)x?CON(CH3)OH where the x values are 4; 3 and 2, and the compounds are abbreviated as 2,4-DIHA, 2,3-DIHA and 2,2-DIHA), containing the peptide group in a certain position to one of the two functional groups and in different distances to the other one, were synthesized and their complexation with Fe(III), Mo(VI) and V(V) was studied by pH-potentiometric, spectrophotometric and in some cases by CV methods to evaluate the redox behaviour of the Fe(III) complexes and assess their potential biological activity as siderophore models. All these compounds are structural models for the natural siderophore, desferrioxamine B (DFB). The results were compared to those of the complexes of 2,5-DIHA having the same connecting chain structure and length as DFB has, and the effects of the length of the connecting chain on the co-ordination mode and on the stability of the complexes formed were evaluated. Very similar stability of the mono-chelated complexes formed with all these dihydroxamic acids was found. All the results obtained suggest that one dihydroxamic acid (even the 2,2-DIHA) is able to complete the four coordination sites of a MoO 2? 2 core forming simple mononuclear complexes. Favoured monomeric structures of the bis-chelated complexes of these dihydroxamic acids are also suggested with V(V) having the smallest ionic radius among the three metal ions studied. In the case of iron(III), however, clear indication was obtained for the slightly different complexation behaviour of 2,2-DIHA. Namely, the formation of the mononuclear bis-chelated complex with this shortest ligand seems to have sufficient strain to induce the formation of bimetallic species such as [Fe(2,2-DIHA)2Fe)]2?. 2004 Elsevier B.V. All rights reserved.
Tárgyszavak:Természettudományok Kémiai tudományok idegen nyelvű folyóiratközlemény külföldi lapban
folyóiratcikk
Dihydroxamic acids
Fe(III)
Mo(VI) and V(V) complexes
Desferrioxamine B models
Megjelenés:Inorganica Chimica Acta. - 357 : 9 (2004), p. 2451-2461. -
További szerzők:Buglyó Péter (1965-) (vegyész) Enyedy Éva Anna (1975-) (vegyész) Santos, Amelia M.
Pályázati támogatás:T034674
OTKA
TS 040685
OTKA
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6.

001-es BibID:BIBFORM010515
Első szerző:Farkas Etelka (vegyész)
Cím:Metal-binding ability of histidine-containing peptidehydroxamic acids: Imidazole versus hydroxamate coordination / Etelka Farkas, Edit Csapó, Péter Buglyó, Chiara A. Damante, Giuseppe Di Natale
Dátum:2009
ISSN:0020-1693
Megjegyzések:Three new peptidehydroxamic acids (L-alanyl-L-histidinehydroxamic acid, L-Ala-L-HisNHOH, L-alanyl-L-alanyl-L-histidinehydroxamic acid, L-Ala-L-Ala-L-HisNHOH and L-histidyl-L-alaninehydroxamic acid, LHis-L- AlaNHOH) were synthesized and their complexation with Cu(II), Ni(II) and Zn(II) were studied by pH-potentiometric, UV-Vis, CD, H-1 NMR, EPR and ESI-MS methods. Each of the studied peptide derivatives involves one side-chain imidazole unit and the effect of this group on the metal binding of the hydroxamic moiety is evaluated in the paper. The obtained results are compared to those of the complexes of some histidine-containing di- or tripeptides and also to those of hydroxamic derivatives of aliphatic peptides. A competition between the hydroxamate and imidazole functions occurs in all systems, but the extent differs from metal to metal, from ligand to ligand and depends very much on the pH. The imidazole was found to play the most determinant role in the Cu(II) complexes, somewhat less in the Ni(II)-containing ones, while (except the case of L-Ala-L-HisNHOH) negligible role was found in the Zn(II)- complexes. Common feature of the Ni(II)- and especially Cu(II)-containing systems is that if an imidazole-N is displaced by a hydroxamate, imidazole-bridged di- and polynuclear complexes are formed. (C) 2008 Elsevier B. V. All rights reserved.
Tárgyszavak:Természettudományok Kémiai tudományok idegen nyelvű folyóiratközlemény külföldi lapban
Megjelenés:Inorganica Chimica Acta. - 362 : 3 (2009), p. 753-762. -
További szerzők:Csapó Edit (1983-) (vegyész) Buglyó Péter (1965-) (vegyész) Damante, Chiara A. Di Natale, Giuseppe
Internet cím:DOI
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7.

001-es BibID:BIBFORM100489
Első szerző:Griffith, Darren M.
Cím:Synthesis and solution behaviour of stable mono-, di- and trinuclear Pd(II) complexes of 2,5-pyridinedihydroxamic acid: X-ray crystal structure of a novel Pd(II) hydroxamato complex / Darren M. Griffith, Linda Bíró, James A. Platts, Helge Müller-Bunz, Etelka Farkas, Péter Buglyó
Dátum:2012
ISSN:0020-1693
Tárgyszavak:Természettudományok Kémiai tudományok idegen nyelvű folyóiratközlemény külföldi lapban
folyóiratcikk
Megjelenés:Inorganica Chimica Acta. - 380 (2012), p. 291-300. -
További szerzők:Bíró Linda (1985-) (vegyész) Platts, James A. Müller-Bunz, Helge Farkas Etelka (1948-) (vegyész) Buglyó Péter (1965-) (vegyész)
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8.

001-es BibID:BIBFORM085975
Első szerző:Jakusch Tamás
Cím:Thiolate-S as anchoring donor in the binary and ternary VO(IV) complexes of mercaptopropionylglycine / Tamás Jakusch, Péter Buglyó, Ana Isabel Tomaz, Joăo Costa Pessoa, Tamás Kiss
Dátum:2002
ISSN:0020-1693
Megjegyzések:The speciation and solution structures of the binary VO(IV) complexes of mertcaptopropionylglycine and its ternary complexes with 2,2·-bipyridyl, tiron, maltol and oxalic acid were studied by pH-potentiometric and spectroscopic (EPR and UV?Vis) methods. The thiolate-S ? donor of mercaptopropionylglycine proved to be an efficient anchoring donor which binds VO(IV) strongly enough to be able to promote deprotonation and subsequent coordination of the peptide?amide group. Ternary complex formation and the promotion of amide deprotonation were found to be favoured with the ( N, N) donor 2,2·-bipyridyl, but disfavoured with the ( O, O) donor ligands tiron, maltol and oxalic acid.
Tárgyszavak:Természettudományok Kémiai tudományok idegen nyelvű folyóiratközlemény külföldi lapban
folyóiratcikk
Vanadium complexes
Mercaptopropionylglycine
Peptide amide
Ternary complexes
Megjelenés:Inorganica Chimica Acta. - 339 (2002), p. 119-128. -
További szerzők:Buglyó Péter (1965-) (vegyész) Tomaz, Ana Isabel Pessoa, Joăo Costa Kiss Tamás
Pályázati támogatás:T31896
OTKA
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9.

001-es BibID:BIBFORM046407
Első szerző:Kiss Tamás
Cím:Oxovanadium(IV) complexes of citric and tartaric acids in aqueous solution / Kiss Tamas, Buglyó Péter, Sanna Daniele, Micera Giovanni, Decock Patrick, Dewaele Dorothee
Dátum:1995
ISSN:0020-1693
Tárgyszavak:Természettudományok Kémiai tudományok idegen nyelvű folyóiratközlemény külföldi lapban
Megjelenés:Inorganica Chimica Acta. - 239 : 1-2 (1995), p. 145-153. -
További szerzők:Buglyó Péter (1965-) (vegyész) Sanna, Daniele (1956-) (vegyész) Micera, Giovanni Decock, Patrick Dewaele, Dorothee
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10.

001-es BibID:BIBFORM099410
Első szerző:Sanna, Daniele (vegyész)
Cím:Speciation in aqueous solution and interaction with low and high molecular mass blood bioligands of [V IV O(oda)(H 2 O) 2 ], a V compound with in vitro anticancer activity / Daniele Sanna, Valeria Ugone, Péter Buglyó, Sándor Nagy, István Kacsir, Eugenio Garribba
Dátum:2018
ISSN:0020-1693
Megjegyzések:In this work the speciation in aqueous solution of the compound [VIVO(oda)(H2O)2], where oda is oxydiacetate dianion (OOCCH2)2O, which shows in vitro anticancer activity, was studied. Its interaction with the two serum bioligands with highest affinity for VIV, lactic (Hlact) and citric (H3citr) acid, and with the two proteins candidate to participate to the transport of VIVO compounds in the organism, transferrin (hTf) and albumin (HSA), was also examined. The study was carried out with the combined application of spectroscopic (Electron Paramagnetic Resonance, EPR), analytical (pH-potentiometry) and computational (Density Functional Theory, DFT) methods. The results showed that in aqueous solution [VO(oda)(H2O)2] undergoes hydrolysis above pH 4-5 with formation of the EPR-active species [(VO)2(oda)2(OH)2]2- around pH 6 and of [(VO)2(OH)5]- at physiological pH. DFT calculations suggested that the most stable isomers of 1:1 species are the hexa-coordinated OC-6-23 with a mer arrangement of oda - similar to that observed in the solid state - and the penta-coordinated SPY-5-14, whereas for 1:2 species the fac arrangement of oda is favored. Citrate is able to displace completely the oda ligand in [VO(oda)(H2O)2] and only the dinuclear species [(VO)2(citrH-1)2]4- was detected at pH 7.4, while with lactate the formation of a mixed complex VIVO-oda-lact was observed. [VO(oda)(H2O)2] interacts with apo-transferrin forming a mixed complex (VO)(hTf)(oda) where vanadium is bound in the iron sites and oda behaves as a synergistic anion, while with albumin no interaction was revealed. Model calculations suggest that when [VO(oda)(H2O)2] is administered orally (concentration ca. 1-10?M) or by injection (concentration approximately in the range 10-100?M), (VO)(hTf) and (VO)2(hTf) should be formed; these species could reach the target organs and be recognized by the hTf receptors of the cells, favoring the vanadium uptake.
Tárgyszavak:Természettudományok Kémiai tudományok idegen nyelvű folyóiratközlemény külföldi lapban
folyóiratcikk
vanádium
Megjelenés:Inorganica Chimica Acta. - 472 (2018), p. 127-138. -
További szerzők:Ugone, Valeria Buglyó Péter (1965-) (vegyész) Nagy Sándor (1993-) (vegyész) Kacsir István (1994-) (vegyész) Garribba, Eugenio
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