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Ferric complexes of acetoacetyl derivatives of poly(L-lysine), poly(L-ornithine), and poly(L-diaminobutyric acid). I. Preparation and absorption properties in solution

✍ Scribed by M. Palumbo; A. Cosani; M. Terbojevich; G. Bacchion; E. Peggion

Publisher
Wiley (John Wiley & Sons)
Year
1976
Tongue
English
Weight
639 KB
Volume
15
Category
Article
ISSN
0006-3525

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✦ Synopsis

Abstract

Poly(N^ε^‐acetoacetyl‐L‐lysine), poly(N^δ^‐acetoacetyl‐L‐ornithine) and poly(N^γ^‐acetoacetyl‐L‐diaminobutyric acid) form colored complexes with ferric ions in water/dioxane solutions. These complexes are soluble at pH values lower than 2.8 and show their maximum absorption at 257 nm in the uv and at 478 nm in the visible region; whereas the ferric complex of the model compound n‐hexylacetoacetamide exhibits absorptions centered at 258 and 536 nm, respectively. It is shown that in the complex of the model compound one metal ion is bound per acetoacetamide group, while in the complexes of the three polymers two β‐ketoamides side chains are bound per ferric ion under the same solvent, pH, concentration, and ionic strength conditions. The binding constants of ferric ions to the three polymers, and the formation constant of the ferric complex of the model compound are also evaluated.

📜 SIMILAR VOLUMES

Ferric complexes of acetoacetyl derivati
Ferric complexes of acetoacetyl derivatives of poly(L-lysine), poly(L-ornithine), and poly(L-diaminobutyric acid). II. Conformational properties in solution. Evidence for a stereospecific complex formation
✍ M. Palumbo; A. Cosani; M. Terbojevich; E. Peggion 📂 Article 📅 1976 🏛 Wiley (John Wiley & Sons) 🌐 English ⚖ 408 KB 👁 2 views

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