Thermodynamic characterization of the aggregation phenomena of SafranineT by spectral titration and chemometric analysis

سال انتشار: 1393
نوع سند: مقاله ژورنالی
زبان: انگلیسی
مشاهده: 681

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شناسه ملی سند علمی:

JR_IJABBR-2-6_016

تاریخ نمایه سازی: 26 اسفند 1394

چکیده مقاله:

The dimerization constants of Safranine T have been determined by studying the dependence of its absorption spectra on the temperature in the range 3070 ◦C at different total concentrations of Safranine T (1.03×10−5, 1.44×10−5 and 1.73×10−5 M). The monomerdimer equilibrium of Safranine T has beendetermined by applying MCR-ALS method on the absorption spectra. The quantitative analysis of the data of undefined mixtures, was carried out by simultaneous resolution of the overlapping spectral bands in the whole set of absorption spectra. In this work the dimerization constant of Safranine T has beendetermined by studying the dependence of absorption spectrum on temperature at different totalconcentrations of dye. The enthalpy and entropy of the dimerization reactions were determined from the dependence of the equilibrium constants on the temperature (vant Hoff equation). From these results it can be inferred that the driving force of the dimerization is of enthalpic origin.

نویسندگان

Masoud Karimi Goftar

Young Researchers and Elite Club, Baft Branch, Islamic Azad University, Baft, Iran

Narges Alizadeh Rayeni

Young Researchers and Elite Club, Baft Branch, Islamic Azad University, Baft, Iran

Nasrollah Moradi kor

Young Researchers and Elite Club, Kerman Branch, Islamic Azad University, Kerman, Iran