Kinetic spectrophotometric method for o-phenylenediamine in the presence of gold(III)
Küçük Resim Yok
Tarih
2007
Yazarlar
Dergi Başlığı
Dergi ISSN
Cilt Başlığı
Yayıncı
Pergamon-Elsevier Science Ltd
Erişim Hakkı
info:eu-repo/semantics/closedAccess
Özet
From the color developing reactions of o-phenylenediamine oxidizing agent and gold(III), the kinetic reactions between both of them in aquaeous solutions were studied using spectrophotometric and differential method. Light absorbances in the visible spectral range are measured as a function of mole fractions of phenylenediamine at a fixed gold(III) concentration and as a function of mole fraction of gold(III) at a fixed o-phenylenediamine concentration at periodic time internal. In the differential method, which was suggested by van't Hoff, one deals with the actual rates of reactions as determined by measuring the slopes of absorbance-time curves. Optimum condition of the reaction were established as pH 6 at lambda = 466 nm and room temperature. When the oxidation of o-phenylenediamine by gold(III) was investigated, it was observed that the following rate formula and rate constant were found: v = k[Au+3](1/2) [o-phenylenediamine](1/2), k = 2.33 x 10(-2) s(-1) (c) 2006 Elsevier B.V. All rights reserved.
Açıklama
Anahtar Kelimeler
Spectrophotometry, Differential Method, Gold(III), O-Phenylenediamine, Reaction Kinetics, Ortho-Substituted Anilines, Gold, Manganese(Ii), Oxidation
Kaynak
Spectrochimica Acta Part A-Molecular And Biomolecular Spectroscopy
WoS Q Değeri
Q2
Scopus Q Değeri
Q2
Cilt
66
Sayı
2
