1957
DOI: 10.1021/j150556a026
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The Interaction of Polyvinylpyrrolidone with Some Azo Dyes

Abstract: Polyvinylpyrrolidone (PVP) displays strong binding affinities toward various organic anions such as the azo dyes orange II (O-II) and benzopurpurin 4B (BP). The binding equilibria were studied by a conductance method and by a dialysis technique. It was found that one dyestuff ion is bound by chain segments of 7 or 10 monomer units for O-II and BP, respectively. It is believed that the dye ions align themselves with their long axis alongside the polymer chain and are held in place by van der Waals forces. The e… Show more

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Cited by 70 publications
(28 citation statements)
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“…Our justification for this assumption rests principally on the fact that our previous studies (2) on the binding of a wide range of simple aromatic cosolutes by PVP showed that for all of these the value of n lay within the range 0.10 4-0.03. Furthermore, similar values of n have been observed with the binding by PVP of diverse other cosolutes, such as the two azo dye-stuffs Orange II and Benzopurpurin 4B (29) and also a wide variety of other such dyes (30), and with chlorbutanol (2,2,2-trichloro-l,l-dimethylethanol) (31), dicumarol (32), and eco-disubstituted alkanes of the bolaform type (12).…”
Section: Choice Of the Site-density Value Nsupporting
confidence: 55%
“…Our justification for this assumption rests principally on the fact that our previous studies (2) on the binding of a wide range of simple aromatic cosolutes by PVP showed that for all of these the value of n lay within the range 0.10 4-0.03. Furthermore, similar values of n have been observed with the binding by PVP of diverse other cosolutes, such as the two azo dye-stuffs Orange II and Benzopurpurin 4B (29) and also a wide variety of other such dyes (30), and with chlorbutanol (2,2,2-trichloro-l,l-dimethylethanol) (31), dicumarol (32), and eco-disubstituted alkanes of the bolaform type (12).…”
Section: Choice Of the Site-density Value Nsupporting
confidence: 55%
“…FRANK und Mitarb. berichten in [32,33] In verschiedenen Arbeiten [41] wurde die Aggregation von MO und seinen Homologen bei der Wechselwirkung rnit PVP untersucht und dabei vor allem von TAKACISHI in [42] eine wachsende Aggregationstendenz rnit zunehmender Lange der Alkylkette des Farbstoffs festgestellt, was sich speziell beim Pentyl-Orange in einem ,,Stacking-Effekt" bei der Wechselwirkung mit PVP zeigte [43].…”
Section: Koinplexe Init P~) L Y ( V I N Y L P~r R O L I~l~~n ) ( P V unclassified
“…In [44] wurde die Wechselwirkung von PVP rnit Molmassen zwischen 10000 und 750000 mit einer Reihe anionischer Farbstoffe verfolgt, die ein bis drei S03H-Gruppen im Molekul enthielten, wobei sich eine Abnahme der Bindungskonstante rnit steigender Zahl von S03H-Gruppen ergab. Von verschiedenen Autoren in [32] beschriebene Ergebnisse zur Bindung unterschiedlicher aromatischer Farbstoffe rnit S03H-Gruppen an PVP sprechen dafur, daR vor allem van der Waalsbzw. Dispersionskrafte f i r die Wechselwirkung rnit dem nur schwach basischen Polymer verantwortlich sind.…”
Section: Koinplexe Init P~) L Y ( V I N Y L P~r R O L I~l~~n ) ( P V unclassified
“…There are a lot of studies on the dye aggregation [14][15][16][17][18][19][20][21], dye/polymer interaction [22][23][24][25][26][27][28], dye/surfactant interaction [29][30][31][32][33][34], polymer/surfactant interaction [35][36][37][38][39], and dye/polymer/surfactant interaction [40][41][42][43].…”
Section: Introductionmentioning
confidence: 99%