The effect of fast neutron and gamma irradiation on thermal,structural and colorant properties of 2,6-diaminopyridine |
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| Authors: | Hassangholi Mohammadi Ali Hassanzadeh Rasol Khodabakhsh |
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| Affiliation: | 1. Department of Physics, Faculty of Science, Urmia University, Urmia, Iran;2. Department of Chemistry, Faculty of Science, Urmia University, Urmia, Iran;3. Research center of Nanotechnology of Urmia University, Urmia, Iran;1. Laboratoire Physico-Chimie de l''Etat Solide, LR11 ES51, Faculte des Sciences de Sfax, Universite de Sfax, 3071, Sfax, Tunisia;2. Laboratoire de Physique Appliquée, Faculté des Sciences de Sfax, Université de Sfax, BP 1171, 3018, Sfax, Tunisia;3. Laboratoire de Cristallographie, CNRS, 25 Avenue des Martyrs, BP 166, 3804, Grenoble Cedex 9, France;1. Laboratoire Physico-Chimie de l''Etat Solide, LR11 ES51, Faculté des Sciences de Sfax, Université de Sfax, 3071, Sfax, Tunisia;2. Laboratoire de Cristallographie, CNRS, 25 avenue des Martyrs, BP 166, 380, France |
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| Abstract: | The variation in structural, thermal and colorant properties of 2,6-diaminopyridine were studied using differential scanning calorimetry (DSC), UV–visible, NMR spectroscopies and powder X-ray diffraction techniques, before and after fast neutrons irradiation with 2.12 and 3.50 kGy and gamma irradiation with 136.16 Gy doses. Under fast neutron irradiation, the sample enthalpy values, and melting and boiling temperatures were varied with increase in the irradiation dose. But the variation in boiling temperature was more pronounced than that of the melting point. However, there was no drastic change in these transition temperatures. The kinetic parameters were calculated using free isoconversional and Kissinger analysis methods. Moreover, UV–visible spectra showed that fast neutron and gamma irradiations had destroyed the color of the title compound. The gamma irradiation showed similar effect on structural and thermal properties. Results are also shown where the intensity of XRD patterns strongly depends on the irradiation dose. According to the NMR results, it seems that the collision occurs between para-hydrogen of 2,6-DAP and fast neutrons. |
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