dc.contributor.author | Gokce, Gultekin | |
dc.date.accessioned | 2019-07-27T12:10:23Z | |
dc.date.accessioned | 2019-07-28T10:03:20Z | |
dc.date.available | 2019-07-27T12:10:23Z | |
dc.date.available | 2019-07-28T10:03:20Z | |
dc.date.issued | 2012 | |
dc.identifier.issn | 0253-5106 | |
dc.identifier.uri | https://hdl.handle.net/20.500.12418/8986 | |
dc.description | WOS: 000317434400020 | en_US |
dc.description.abstract | The acid dissociation constants of 3-(m-nitrophenyl)-1,5-diphenyl formazan (MNF) and 3-(p-nitrophenyl)-1,5-diphenyl formazan (PNF) have been determined in acetonitrile-water binary mixtures [50%, 60% and 70% (v/v)] by spectrophotometric method at 25 degrees C and an ionic strength of 0.1 mol .L-1 KCl. The absorption spectra were recorded in solutions of varying pH-values. Data evaluation was performed using the STAR software program which calculates stability constants and molar absorbances of the pure species by multilinear regression. A linear relationship between acidity constants and the mole fraction of acetonitrile in the solvent mixture was observed. The effect of solvent properties on acid-base behavior was discussed. The effect of nitro groups attached to para and meta positions on the ionization constant were investigated and the results were recorded. | en_US |
dc.description.sponsorship | Kafkas University [2008-FEF-18] | en_US |
dc.description.sponsorship | The author greatly acknowledges the financial support from Kafkas University (project no: 2008-FEF-18) and Jose L. Beltran from Universitat de Barcelona for kindly providing the spectral data processing software, STAR. | en_US |
dc.language.iso | eng | en_US |
dc.publisher | CHEM SOC PAKISTAN | en_US |
dc.rights | info:eu-repo/semantics/closedAccess | en_US |
dc.subject | Formazan | en_US |
dc.subject | acidity constants | en_US |
dc.subject | acetonitrile-water mixtures | en_US |
dc.subject | spectroscopic method | en_US |
dc.title | Spectrophotometric pKa Values of 3-(m-Nitrophenyl)-1,5-Diphenyl Formazan (MNF) and 3-(p-Nitrophenyl)-1,5-Diphenyl Formazan (PNF) in Different MeCN-Water Binary Mixtures | en_US |
dc.type | article | en_US |
dc.relation.journal | JOURNAL OF THE CHEMICAL SOCIETY OF PAKISTAN | en_US |
dc.contributor.department | Cumhuriyet Univ, Fac Educ, Dept Elementary Sci Educ, TR-58150 Sivas, Turkey | en_US |
dc.identifier.volume | 34 | en_US |
dc.identifier.issue | 5 | en_US |
dc.identifier.endpage | 1168 | en_US |
dc.identifier.startpage | 1163 | en_US |
dc.relation.publicationcategory | Makale - Uluslararası Hakemli Dergi - Kurum Öğretim Elemanı | en_US |