𝔖 Bobbio Scriptorium
✦   LIBER   ✦

Polyelectrolyte complexes. II. Specific aspects of the formation of polycation/dye/polyanion complexes

✍ Scribed by Stela Dragan; Demetra Dragan; Mariana Cristea; Anton Airinei; Luminita Ghimici

Publisher
John Wiley and Sons
Year
1999
Tongue
English
Weight
262 KB
Volume
37
Category
Article
ISSN
0887-624X

No coin nor oath required. For personal study only.

✦ Synopsis

We report on the formation of the polycation/dye/polyanion (PC/D/PA) complexes by the interaction between nonstoichiometric polycation/dye (PC/D) complexes with polyanions. Polycations differed in their content of the (N,N-dimethyl-2hydroxypropylene ammonium chloride) units in the main chain. Poly(sodium acrylate) (NaPA), poly(sodium 2-acrylamido-2-methylpropane sulfonate) (NaPAMPS) and poly-(sodium styrenesulfonate) (NaPSS) were used as polyanions. Crystal Ponceau 6R (CP6R) and Ponceau 4R (P4R) with two or three sulfonic groups were used as anionic dyes. The interaction between nonstoichiometric PC/D complexes and polyanions was followed by UV-VIS spectroscopy, viscometry, and conductometry measurements. Formation of PC/D/PA complexes takes place mainly by the electrostatic interaction between the polyanion and the free positive charges of the nonstoichiometric PC/D complex. The stoichiometry and the stability of the tricomponent complexes depended on the polycation structure, the structure and molecular weight of polyanion, the dye structure, and the P/D molar ratio. A high amount of the dye was excluded from the complex before the end point when a branched polycation was used. The higher the solubility of the dye the lower the stability of the PC/D/PA complexes.

πŸ“œ SIMILAR VOLUMES

Complexes of polyelectrolyte hydrogels w
Complexes of polyelectrolyte hydrogels with organic dyes: Effect of charge density on the complex stability and intragel dye aggregation
✍ C. H. Jeon; E. E. Makhaeva; A. R. Khokhlov πŸ“‚ Article πŸ“… 1999 πŸ› John Wiley and Sons 🌐 English βš– 215 KB πŸ‘ 2 views

The swelling behavior of polyelectrolyte gels based on poly(diallyldimethylammonium chloride) (copolymers of diallyldimethylammonium chloride and acrylamide with the variable composition) and poly(methacrylic acid, sodium salt) in the presence of organic water soluble dyes (alizarin, naphthol blue b

Dual Specificity and the Formation of St
Dual Specificity and the Formation of Stable Autoimmune Complexes
✍ Creg J. Workman; William P. Pfund; Edward W. Voss πŸ“‚ Article πŸ“… 1997 πŸ› John Wiley and Sons 🌐 English βš– 192 KB

Since dual specificity at the antibody active-site level involves new principles relative to monospecific antigenantibody interactions and may be a general property of autoantibodies, it was important to further characterize such antibodies. Four lupus derived autoantibodies were studied to understa

Bis(dipeptide ester–H+) Complexes of Pal
Bis(dipeptide ester–H+) Complexes of Palladium(II) – Precursors for the Formation of Cyclotetrapeptides
✍ Katharina Haas; Eva-Maria Ehrenstorfer-SchΓ€fers; Kurt Polborn; Wolfgang Beck πŸ“‚ Article πŸ“… 1999 πŸ› John Wiley and Sons 🌐 English βš– 257 KB πŸ‘ 1 views

trans-Bis(dipeptide ester)palladium 1-6 complexes with a Addition of NaOCH 3 to Pd Ph 5] results in the formation of the deprotonated amide group were obtained by dehydrochlorination of trans-Cl 2 Pd(dipeptide ester) 2 or by direct corresponding complexes 7, 8 with cyclic tetrapeptides which also c