Polarographic behaviour of 3-(2?-thiazolylazo)-2, 6-diaminopyridine using DC and differential pulse polarography

Abstract

The polarographic behaviour of 3-(2'-thiazolylazo)-2,6-diaminopyridine (2,6-TADAP) has been studied in aqueous buffer solutions and aqueous-ethanol mixtures of different pH's using DC and DP polarographic methods. The reduction of the azo linkage takes place via two electrons in both aqueous and aqueous-ethanol mixtures. The linear relationship between the current and 2,6-TADAP concentration allowed the polarographic determination of 2,6-TADAP over a wide concentration range. The values of the adsorption parameters in the presence of both Triton X-100 (non-ionic) and a new non-ionic surfactant, nonylphenol polyoxypropylene polyoxyethylene (NPE 1800) have been computed. The kinetic parameters of the electrode reaction have been calculated.

4-Amino-3-ammoniopyridinium dinitrate

“…For background to the chemistry of substituted pyridines, see: Pozharski et al (1997); Katritzky et al (1996); Abu Zuhri & Cox (1989). For related structures, see: Fun & Balasubramani (2009);Rubin-Preminger & Englert (2007); Qin & Wang (2009).…”

“…In particular, diaminopyridines play an important role in the preparation of aromatic azo dyes, the subject of many polarographic investigations (Abu Zuhri & Cox, 1989). Pyridine and its substituted derivatives are often involved in hydrogen-bond interactions (Jeffrey & Saenger, 1991;Jeffrey, 1997;Scheiner, 1997).…”

Bis(2,6-diaminopyridinium) bis(hydrogen oxalate) monohydrate

“…Data collection: APEX2 (Bruker, 2009); cell refinement: SAINT (Bruker, 2009); data reduction: SAINT; program(s) used to solve structure: SHELXTL (Sheldrick, 2008); program(s) used to refine structure: SHELXTL; molecular graphics: SHELXTL; software used to prepare material for publication: SHELXTL and PLATON (Spek, 2009). the subject of many polarographic investigations (Abu Zuhri & Cox, 1989). The crystal structures of 2,6-diaminopyridine (Schwalbe et al, 1987), tetrakis(2,6-diaminopyridinium) diphthalate 2,6-diaminopyridine (Al-Dajani et al, 2009), 2,6-diaminopyridinium pyridinium-2,6-dicarboxylate (Aghabozorg et al, 2005), 2,6-diaminopyridinium hydrogen fumarate (Büyükgüngör & Odabaşoğlu, 2006), bis(2,6-diaminopyridinium) oxalate dihydrate (Odabaşoğlu & Büyükgüngör, 2006), 2,6-diamino pyridinium bromide monohydrate (Haddad & Al-Far, 2003) and 2,6-diamino pyridinium 2-carboxybenzoate (Al-Dajani et al, 2010) have been reported in the literature.…”

“…For applications of 2,6-diaminopyridine, see: Abu Zuhri & Cox (1989). For related structures, see; Schwalbe et al (1987); Al-Dajani et al (2009, 2010; Aghabozorg et al (2005); Bü yü kgü ngö r & Odabaşog lu (2006); Odabaşog lu & Bü yü kgü ngö r (2006); Haddad & Al-Far (2003).…”

2-Amino-3-ammoniopyridinium dichloride

“…For background to the chemistry of substituted pyridines and chloride anions, see: Pozharski et al (1997); Katritzky et al (1996); Abu Zuhri & Cox (1989); De Cires-Mejias et al (2004); Sessler et al (2003). For related structures, see: ; Balasubramani & Fun (2009a,b).…”