Potentiometeric study of protonation and complex formation of some amino acids with Zn (II) , Co(II) and Ni (II) in aqueous solution

Subject Areas : Journal of the Iranian Chemical Research

Mohammad Mazloum-Ardakani ¹ , Sharam Lotfi ² , Jahan B. Ghasemi ³

1 - Department of Chemistry, Faculty of Science, Yazd University, Yazd, Iran
2 - Department of Chemistry, Faculty of Sciences, Payame Noor University (PNU), Iran
3 - Department of Chemistry, Faculty of Sciences, K.N. Toosi University, Tehran, Iran

Received: 2009-05-28 Accepted : 2009-11-15 Published : 2009-12-31

Keywords: L-glutamine, L-arginine, glycine, BEST, Potentiometrically, Nonaqueous, solvents,

Abstract :

The stability constants and complexation reaction between L-glutamine, L-arginine andglycine with Zn (II) , Co (II) and Ni (II) were studied potentiometrically in aqueous solution at25° C and μ=0.1 M KNO3. The overall stability constants log β´s of all species are obtained bycomputer refinement of pH-volume data using BEST computer program. Several models weretested and the lowest δFIT, the best one is accepted. The main species in binary complexes MHL,ML, ML2, MLOH, ML(OH)2 and for ternary complexes are ML1L2, ML1L2H, ML1L2OH,ML1L2(OH)2. The order found for the resulting stability constants vary as Co (II) < Ni (II) <Zn(II). The concentration distribution diagram was obtained with the program SPEPLOT.

References:

[1] Z.B. Maksimovic, A. Miksa- Spiric, S.V.Ribnikar, J. Inorg. Nucl. Chem. 35 (1973) 1239-1246.
[2] G. Hefter, Coord. Chem. 12 (1974) 221-239.
[3] D. Kong, A.E. Martell, R.J. Motekaitis, J.H. Reibenspies, J. Inorg. Chim. Acta 317 (2001) 243-251.
[4] D. Vulpius, G. Geipel, L. Baraniak, G. Bernhard, Spectrochim. Acta Part A 63 (2006) 603-608.
[5] J. Ghasemi, Sh. Ahmadi, K. Torkestani, Anal. Chim. Acta 487 (2003) 181-188.
[6] J.F. Chen, Y.X. Xia, G.R. Choppin, Anal. Chem. 68 (1996) 3973-3981.
[7] D. Janecki, K. Dokto´r, T. Michalowski, Talanta 48 (1999) 1191-1197.
[8] I. Sovaga, A. Gergely, Pure Appl. Chem. 65 (1993) 1029-1080.
[9] T.Kiss, I.Sovaga, A.Gergely, Pure &Appl.Chem. 63 (1991) 597-606.
[10] A. Braibanti, G. Ostacoli, P. Paoletti, L.D. Pettit, S. Sammartano, Pure Appl. Chem. 59 (1967) 1721-
1728.
[11] A. Braibanti, F. Dallavalle, G. Mori, B.Veroni, Talanta 29 (1982) 725-731.
[12] A. Braibanti, C. Bruschi, E. Fisicaro, M. Pasquali, Talanta, 33 (1986) 471-480.
[13] H. Sigel, Metal Ions in Biological System, Marcel Dekker, New York, 1975.
Sh. Lotfi et al. / J. Iran. Chem. Res. 2 (2009) 247-255
255
[14] R.W. Schayer, Biogenic Amines and physiological Membrane in Drug Therapy, Marcel Dekker,
New York, 1971.
[15] G.L. Eichhorn, Inorganic Biochemistry, Elsevier, Amsterdam, 1973.
[16] V. Vojinovi´c, F.M.F. Esteves, J.M.S. Cabral, L.P. Fonseca, Anal. Chim. Acta 565 (2006) 240-249.
[17] P. Paoletti, Pure Appl. Chem. 56 (1984) 4-12.
[18] M.S. Nair, P.T. Arasu, M.S. Pilai, C. Natarajan, Talanta 40 (1993) 1411-1417.
[19] M.T. Beck, Pure Appl. Chem. 49 (1977) 127-135.
[20] D.G. Tuck, Pure Appl.Chem. 55 (1983) 1477-1528.
[21] M.S. Nair, K. Venkatachalapalthi, M. Santappa, J. Chem. Soc. Dalton Trans. 26 (1982) 555-561.
[22] A.E. Martell, R.J. Motekaitis, Determination and Use of Stability Constants, VCH, New York, 1992.
[23] M. Maeder, Y.M. Neuhold, G. Puxty, Chemom. Intell. Lab. Syst. 70 (2004) 193-203.
[24] G. Ghasemi, A. Shokrollahi, Iran. J. Chem. Chem. Eng. 20 (2001) 22-28.
[25] R.J. Molekalis, A.E. Martell, Can. J. Chem. 60 (1982) 2403-2416.
[26] M.B. Gholivand , F. Bamdad, J. Ghasemi, Talanta 46 (1998) 875-884..
[27] Raue. Roderich; Ullmann’s Encyclopedia of Industrial Chemistry, 6th completely Revised Ed.,
Wiley- Vch, 4, 2003.
[28] R.P. Martin, R.A. Paris, Bull. Soc. Chim. France 54 (1964) 3170-3179.
[29] O. Enea, G. Berthon, Termochim. Acta 50 (1981) 147-157.
[30] R.N. Patel, N. Singh, R. P. Shrivastava, S. Kumar, J. Molecular Liquids, 89 (2000) 207-211.
[31] I. Török, P. Surdy, A. Rockenbauer, L. Korecz Jr., G.J.A.A. Koolhaas, T. Gajda, J. Inorg.
Biochem.71 (1998) 7-11.
[32] H. Sigel, Angew. Chem. Int. 14 (1975) 394-402.