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Mechanochemically induced anion exchange in aminoazobenzene salts

Džeba, Iva; Halasz, Ivan; Lukić-Glavaš, Kaja; Vančik, Hrvoje (2014) Mechanochemically induced anion exchange in aminoazobenzene salts. Croatica Chemica Acta, 87 (4). pp. 407-412. ISSN 0011-1643

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minoazobenzene sulfate salt reacts with the crystals of KBr in solid-state under high pressure yield-ing 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 -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
Uncontrolled Keywords: mechanochemistry; solid-state reaction, azobenzene, Avrami equation, piezochromism
Subjects: NATURAL SCIENCES > Chemistry
Divisions: Division of Materials Chemistry
Division of Physical Chemistry
Depositing User: Sofija Konjević
Date Deposited: 17 Apr 2015 13:57
DOI: 10.5562/cca2485

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