Potentiometric and spectroscopic studies on yttrium(III) complexes of dihydroxybenzoic acids

Aydin R., Ozer U.

CHEMICAL & PHARMACEUTICAL BULLETIN, cilt.52, sa.1, ss.33-37, 2004 (SCI-Expanded) identifier identifier identifier

  • Yayın Türü: Makale / Tam Makale
  • Cilt numarası: 52 Sayı: 1
  • Basım Tarihi: 2004
  • Doi Numarası: 10.1248/cpb.52.33
  • Dergi Adı: CHEMICAL & PHARMACEUTICAL BULLETIN
  • Derginin Tarandığı İndeksler: Science Citation Index Expanded (SCI-EXPANDED), Scopus
  • Sayfa Sayıları: ss.33-37
  • Bursa Uludağ Üniversitesi Adresli: Evet

Özet

The equilibrium reactions of yttrium(III) ion with dihydroxybenzoic acids (2,3-dihydroxybenzoic acid (2,3-DHBA) and 3,4-dihydroxybenzoic acid (3,4-DHBA)) (H3L) were investigated in aqueous solution by means of potentiometric and spectroscopic methods, in 0.1 mol.l(-1) ionic strength medium at 25degreesC. The stability constants are reported for YL, YL(HL)(2-) and YL23--type mononuclear complexes. 2,3-DHBA can bind Y(III) ion strongly and the salicylate mode is effective over the acidic pH range. But in higher pH range, 2,3-DHBA and 3,4-DHBA act more efficiently through catecholate groups. The complexes of 2,3-DHBA are more stable than the complexes of 3,4-DHBA.