Thermal and Infrared Study of Desorption of Pyridine and Pyridine Derivatives from Ni-exchanged Montmorillonite |
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| Authors: | Jóna E. Kubranová M. Sirota A. Kopcová M. |
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| Affiliation: | (1) Department of Inorganic Chemistry, Slovak Academy of Sciences, 842 36 Bratislava, Slovakia;(2) Department of Chemistry and Technology of Inorganic Materials, Faculty of Industrial Technologies, University of Trenčin, 020 32 Púchov, Slovakia;(3) Department of Inorganic Chemistry, Slovak Technical University, 812 37 Bratislava, Slovakia |
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| Abstract: | Thermal analysis (TG, DTG) and infrared absorption spectra were used to study desorption of pyridine (py), 4-methylpyridine (4-Mepy) and 4-ethylpyridine (4-Etpy) from Ni(II)-exchanged montmorillonite (Ni-MMT). It is shown that the bonds between the derivatives of pyridine (R-py) and the montmorillonite exhibit predominantly Lewis acid character. The thermal stability of studied samples and the total amounts of R-py inserted in the porous structure of Ni-MMT increase in the following sequence: py/Ni-MMT<4-Mepy/Ni-MMT<4-Etpy/Ni-MMT, i. e. the influence of the substituent on the pyridine ring is evident. This revised version was published online in August 2006 with corrections to the Cover Date. |
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| Keywords: | desorption of pyridine derivatives infrared spectra Ni(II)-montmorillonite thermal study |
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