Mechanochemically Induced Anion Exchange in Aminoazobenzene Salts

Džeba, Iva; Halasz, Ivan; Lukić-Glavaš, Kaja; 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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Abstract

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 -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:	Iva Džeba
Date Deposited:	18 Feb 2025 11:17
URI:	http://fulir.irb.hr/id/eprint/9579
DOI:	10.5562/cca2485

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