Study of the optical rotation of dextran solutions containing metal ions

Lugovaya, Z.A; Tolmachev, V.N.; Il'yenko, I.B.

doi:10.1016/0032-3950(81)90192-1

Cited by 4 publications

(2 citation statements)

References 4 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…There is a little selectivity between potential coordination sites in saccharides [11]. In polysaccharides the hydroxyl groups at C2 and C3 are also involved in coordination and that process does not influence the saccharide units conformation [27]. Disordered conformations of polysaccharide chains has a priority at low salt concentration but as concentration increases ordering of the macrostructure in complexes proceeds [51][52][53].…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Starch–metal complexes and their rheology

Ciesielski¹,

Krystyjan²

2009

E-Polymers

View full text Add to dashboard Cite

Changes in conductivity of 5 w/w% starch gels was studied on their titration with 0.1 M aqueous solutions of selected metal salts. Starch gels usually trapped around 10 mg metal ions per 1 g starch [Co(II), Cu(II), Fe(III), Ni(II)] and that value was only slightly dependent on starch origin (amaranthus, corn, potato, tapioca, waxy corn). Among salts studied (acetates, chlorides, nitrates) FeCl 3 and NiCl 2 were likely to be used because they hydrolyzed increasing conductivity of the solutions and formed micelles of corresponding hydroxides adhering to starch micelles and increasing amount of trapped metal. Addition of metal salts to starch gels had a devastating effect on pseudoplasticity and viscosity of starch gels and only potato starch gel was to a certain extent, exceptional in that respect.

show abstract

Section: Introductionmentioning

confidence: 99%

“…Consequently, also polysaccharides are capable as O-ligate metal ions [12][13][14][15][16][17][18][19][20][21][22][23][24][25][26][27]. Particular attention has been paid to starch as the ligand of metal ions.…”

Section: Introductionmentioning

confidence: 99%

Starch–metal complexes and their rheology

Ciesielski¹,

Krystyjan²

2009

E-Polymers

View full text Add to dashboard Cite

show abstract

Solution thermodynamics of the dextran/methoxy ethylene glycol system

Güner

Çatıker

2001

J of Applied Polymer Sci

View full text Add to dashboard Cite

ABSTRACT:The title monomer was synthesized from 3-isopropenyl-␣,␣-dimethylbenzyl isocyanate in a significantly better yield than was previously reported. 3-Isopropenyl-␣,␣-dimethylbenzylamine proved incapable of homopolymerization using free-radical initiation but readily copolymerized with a variety of commonly available monomers under free-radical conditions. Films of some of the copolymers were prepared and crosslinked using a variety of multifunctional epoxy compounds. The films had good solvent resistance, high hardness, and good gloss.

show abstract

Study of terbium(III)–dextran and terbium(III)–α‐methyl glucoside interactions

Soares

Rodrigues

Alario

1993

J Polym Sci B Polym Phys

View full text Add to dashboard Cite

The interaction of dextran with terbium(III) was studied in aqueous solution, pH 3.0–6.6, by fluorescence and optical rotatory dispersion. The polysaccharide enhances Tb(III) fluorescence intensity when the system is excited at the 290‐nm hypersensitive transition (7F6 → 5H4). The dextran rotatory power is decreased in the presence of the metal ion. The results indicate that a 38% maximum of the polymer repeat units are coordinated. Complex formation occurs with displacement of water from the cation coordination sphere by hydroxyl groups at the second and third carbon atoms of the pyranoside ring. As the pH increases, a more asymmetric complex is formed. The α‐methyl glucoside, low molecular weight dextran analogue, interacts with Tb(III) less strongly than dextran. Fluorimetric titrations indicated that the order of binding ability to polysaccharide is Tb(III) > Al(III) > Ca (II). © 1993 John Wiley & Sons, Inc.

show abstract

Study of the optical rotation of dextran solutions containing metal ions

Cited by 4 publications

References 4 publications

Starch–metal complexes and their rheology

Starch–metal complexes and their rheology

Solution thermodynamics of the dextran/methoxy ethylene glycol system

Study of terbium(III)–dextran and terbium(III)–α‐methyl glucoside interactions

Contact Info

Product

Resources

About