Piezochromism, kinetics and mechanism of solid-state phase transition of aminoazobenzene salts (CROSBI ID 512756)
Prilog sa skupa u zborniku | sažetak izlaganja sa skupa
Podaci o odgovornosti
Lukić, Kaja ; Halasz, Ivan ; Biljan, Tomislav ; Vančik, Hrvoj
engleski
Piezochromism, kinetics and mechanism of solid-state phase transition of aminoazobenzene salts
This work represents a solid-state kinetics and mechanism studies of the high pressure induced phase transition of 4-azobenzeneammonium sulphates (piezochromic effect). At room temperature the compound is a stable orange colored polycrystalline material, but in KBr pellet under the high mechanical pressure it changes color to violet. The kinetics of this conversion was analyzed by measuring the IR spectral changes at different temperatures and by using the Avrami – Erofeev methodology. From the analysis of the typical sigmoid kinetic curves, we speculate about possible mechanisms. From these kinetic studies it also follows that the transition state obtained after the pressure impact affords “ non-Arrhenius behavior” because it changes its structure with variations in temperature. The mechanistic interpretation
Ppezochromism ; kinetics ; mechanism of phase transition ; aminoazobenzene salts
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Podaci o prilogu
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2005.
objavljeno
Podaci o matičnoj publikaciji
XIX hrvatski skup kemičara i kemijskih inženjera : Knjiga sažetaka,
Rapić, Vladimir ; Rogošić, Marko
Zagreb: Hrvatsko društvo kemijskih inženjera i tehnologa (HDKI)
953-68942-38
Podaci o skupu
XIX Hrvatski skup kemičara i kemijskih inženjera
poster
24.04.2005-27.04.2005
Opatija, Hrvatska