Factors influencing the thermal stability of azo and bisazo compounds

Masoud Kazem-Rostami

doi:10.1007/s10973-019-08884-4

Factors influencing the thermal stability of azo and bisazo compounds

Masoud Kazem-Rostami^*

^*Corresponding author for this work

Faculty of Science and Engineering

Research output: Contribution to journal › Article › peer-review

21 Citations (Scopus)

Abstract

The present study investigates the effects of substituents, structural rigidity, tautomerism, hydrogen bonding interaction, and spatial hindrance on the thermal stability of some azo compounds including bisazo Troger base analogs (BATBAs). The relatively large structures of BATBAs allow assessing their thermal stability before reaching the sublimation or boiling point. BATBAs carry two identical azo groups per molecule resulting in an intense and detectable sign of decomposition. Unlike most azo dyes, BATBAs are not ionic and prevent the complexity of decomposition associated with simultaneous dehydration. A few commercial azo dyes are also analyzed to evaluate the generality of the conclusion.

Original language	English
Pages (from-to)	613-623
Number of pages	11
Journal	Journal of Thermal Analysis and Calorimetry
Volume	140
Issue number	2
DOIs	https://doi.org/10.1007/s10973-019-08884-4
Publication status	Published - Apr 2020

Keywords

Azo
Bisazo
Thermal decomposition
Thermal stability
Thermolysis
Tröger base

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10.1007/s10973-019-08884-4

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AB - The present study investigates the effects of substituents, structural rigidity, tautomerism, hydrogen bonding interaction, and spatial hindrance on the thermal stability of some azo compounds including bisazo Troger base analogs (BATBAs). The relatively large structures of BATBAs allow assessing their thermal stability before reaching the sublimation or boiling point. BATBAs carry two identical azo groups per molecule resulting in an intense and detectable sign of decomposition. Unlike most azo dyes, BATBAs are not ionic and prevent the complexity of decomposition associated with simultaneous dehydration. A few commercial azo dyes are also analyzed to evaluate the generality of the conclusion.

KW - Azo

KW - Bisazo

KW - Thermal decomposition

KW - Thermal stability

KW - Thermolysis

KW - Tröger base

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JO - Journal of Thermal Analysis and Calorimetry

JF - Journal of Thermal Analysis and Calorimetry

IS - 2

ER -

Factors influencing the thermal stability of azo and bisazo compounds

Abstract

Keywords

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