Identification of two aromatic isomers between 3- and 4-hydroxy benzoic acid by their perturbation on the potential oscillations of a Belousov-Zhabotinsky system

Identification of two aromatic isomers between 3- and 4-hydroxy benzoic acid by their perturbation on the potential oscillations of a Belousov-Zhabotinsky system

A novel method for identification of two aromatic isomers of mono hydroxy benzoic acid (HBA) was reported by using their different perturbation effects on the potential oscillations of a Belousov-Zhabotinsky (BZ) system. In such a system, a macrocyclic complex of Cu [CuL](ClO4)2 was used as catalyst...

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Main Authors: Waqar Uddin, Gang Hu, Xuanxuan Sun, Hui Zhang, Yegui Wang, Lin Hu
Format: Article
Language:English
Published: Elsevier 2020-01-01
Series:Arabian Journal of Chemistry
Online Access:http://www.sciencedirect.com/science/article/pii/S187853521730179X
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spelling doaj-92675426e5e54a57878661cb8c0f70822020-11-25T01:38:39ZengElsevierArabian Journal of Chemistry1878-53522020-01-0113110791087Identification of two aromatic isomers between 3- and 4-hydroxy benzoic acid by their perturbation on the potential oscillations of a Belousov-Zhabotinsky systemWaqar Uddin0Gang Hu1Xuanxuan Sun2Hui Zhang3Yegui Wang4Lin Hu5Department of Chemistry, Anhui University, Hefei 230601, People’s Republic of ChinaDepartment of Chemistry, Anhui University, Hefei 230601, People’s Republic of China; Corresponding author.Department of Chemistry, Anhui University, Hefei 230601, People’s Republic of ChinaDepartment of Chemistry, Anhui University, Hefei 230601, People’s Republic of ChinaInstitute of Applied Chemistry, East China Jiaotong University, Nanchang 330013, People’s Republic of ChinaInstitute of Applied Chemistry, East China Jiaotong University, Nanchang 330013, People’s Republic of ChinaA novel method for identification of two aromatic isomers of mono hydroxy benzoic acid (HBA) was reported by using their different perturbation effects on the potential oscillations of a Belousov-Zhabotinsky (BZ) system. In such a system, a macrocyclic complex of Cu [CuL](ClO4)2 was used as catalyst in which ligand L is 5,7,7,12,14,14-hexamethyl-1,4,8,11-tetraazacyclotetradeca-4,11-diene. To the BZ system, 3-hydroxy benzoic acid (3-HBA) could temporarily quench and regenerate potential oscillations with damping characters after inhibition time (tin) while 4-hydroxy benzoic acid (4-HBA) could only change the oscillation amplitude (ΔA) to give damping oscillations with no inhibition time. Thus, these two isomers of HBA were identified. Reaction mechanisms of BZ have been proposed by FKN model. An explanation of perturbation mechanism is that, although 3-HBA reacted with BrO2· while 4-HBA reacted with BrO3−, they all produced 1,4-quinone. Keywords: Belousov-Zhabotinsky, Perturbation, Hydroxy benzoic acid, Isomer, Identificationhttp://www.sciencedirect.com/science/article/pii/S187853521730179X
collection DOAJ
language English
format Article
sources DOAJ
author Waqar Uddin
Gang Hu
Xuanxuan Sun
Hui Zhang
Yegui Wang
Lin Hu
spellingShingle Waqar Uddin
Gang Hu
Xuanxuan Sun
Hui Zhang
Yegui Wang
Lin Hu
Identification of two aromatic isomers between 3- and 4-hydroxy benzoic acid by their perturbation on the potential oscillations of a Belousov-Zhabotinsky system
Arabian Journal of Chemistry
author_facet Waqar Uddin
Gang Hu
Xuanxuan Sun
Hui Zhang
Yegui Wang
Lin Hu
author_sort Waqar Uddin
title Identification of two aromatic isomers between 3- and 4-hydroxy benzoic acid by their perturbation on the potential oscillations of a Belousov-Zhabotinsky system
title_short Identification of two aromatic isomers between 3- and 4-hydroxy benzoic acid by their perturbation on the potential oscillations of a Belousov-Zhabotinsky system
title_full Identification of two aromatic isomers between 3- and 4-hydroxy benzoic acid by their perturbation on the potential oscillations of a Belousov-Zhabotinsky system
title_fullStr Identification of two aromatic isomers between 3- and 4-hydroxy benzoic acid by their perturbation on the potential oscillations of a Belousov-Zhabotinsky system
title_full_unstemmed Identification of two aromatic isomers between 3- and 4-hydroxy benzoic acid by their perturbation on the potential oscillations of a Belousov-Zhabotinsky system
title_sort identification of two aromatic isomers between 3- and 4-hydroxy benzoic acid by their perturbation on the potential oscillations of a belousov-zhabotinsky system
publisher Elsevier
series Arabian Journal of Chemistry
issn 1878-5352
publishDate 2020-01-01
description A novel method for identification of two aromatic isomers of mono hydroxy benzoic acid (HBA) was reported by using their different perturbation effects on the potential oscillations of a Belousov-Zhabotinsky (BZ) system. In such a system, a macrocyclic complex of Cu [CuL](ClO4)2 was used as catalyst in which ligand L is 5,7,7,12,14,14-hexamethyl-1,4,8,11-tetraazacyclotetradeca-4,11-diene. To the BZ system, 3-hydroxy benzoic acid (3-HBA) could temporarily quench and regenerate potential oscillations with damping characters after inhibition time (tin) while 4-hydroxy benzoic acid (4-HBA) could only change the oscillation amplitude (ΔA) to give damping oscillations with no inhibition time. Thus, these two isomers of HBA were identified. Reaction mechanisms of BZ have been proposed by FKN model. An explanation of perturbation mechanism is that, although 3-HBA reacted with BrO2· while 4-HBA reacted with BrO3−, they all produced 1,4-quinone. Keywords: Belousov-Zhabotinsky, Perturbation, Hydroxy benzoic acid, Isomer, Identification
url http://www.sciencedirect.com/science/article/pii/S187853521730179X
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