Mechanochemically Induced Anion Exchange in Aminoazobenzene Salts

Džeba, Iva and Halasz, Ivan and Lukić-Glavaš, Kaja and Vančik, Hrvoj (2014) Mechanochemically Induced Anion Exchange in Aminoazobenzene Salts. Croatica Chemica Acta, 87 (4). pp. 407-412. ISSN 0011-1643

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Aminoazobenzene sulfate salt reacts with the crystals of KBr in solid-state under high pressure yielding corresponding bromide salt. The reactant and product differ also in the position of protonation, amino group,and azo group, respectively. Since protonation of azo-group destroys the coplanarity of two benzene rings and diminishes π-conjugation, the product differs from the reactant also in color, from orange to violet. Hence, the reaction is the example of the piezochromic effect. This solid-state process is studied by kinetic measurements,and the structures of the compounds were analyzed by X-ray chrystallography.

Item Type: Article
Keywords: mechanochemistry; solid-state reaction; azobenzene; Avrami equation; piezochromism
Date: 2014
Subjects: NATURAL SCIENCES > Chemistry
Divisions: Faculty of Science > Department of Chemistry
Publisher: Hrvatsko kemijsko društvo
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Depositing User: Branka Maravic
Date Deposited: 31 Mar 2015 12:16
Last Modified: 31 Mar 2015 12:23

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