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Synthesis, structure elucidation, vibrational and thermal behavior study of new one-core dication molten-salt

We decided to conduct the acid-base reaction of piperazine and sulfuric acid as a secondary diamine and diprotic acid, respectively. A new molten salt was obtained, which its structure elucidation was performed by FTIR, 1D NMR, 2D NMR, and mass spectrometry. In contrast to previous reports and our e...

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Main Authors: Zaharani, Lia, Khaligh, Nader Ghaffari, Johan, Mohd Rafie
Format: Article
Published: Elsevier 2021
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QD Chemistry
Online Access:http://eprints.um.edu.my/26972/
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spelling my.um.eprints.269722022-05-11T08:20:19Z http://eprints.um.edu.my/26972/ Synthesis, structure elucidation, vibrational and thermal behavior study of new one-core dication molten-salt Zaharani, Lia Khaligh, Nader Ghaffari Johan, Mohd Rafie QD Chemistry We decided to conduct the acid-base reaction of piperazine and sulfuric acid as a secondary diamine and diprotic acid, respectively. A new molten salt was obtained, which its structure elucidation was performed by FTIR, 1D NMR, 2D NMR, and mass spectrometry. In contrast to previous reports and our expectation, no characteristic signal was detected for the existence of hydrogen sulfate anion in 1 H NMR of molten salt in DMSO-d(6). The H-1 NMR of reactants, the new molten salt, and another derivative of this molten salt analyzed in the same deuterated solvent. Further support for the formation of 1H,4H-piperazineN,N'-diium dication was concluded by an NMR study of its bromide derivative i.e., 1H,4H-piperazine-N,N'diium dibromide. Based on the results of FTIR, NMR, pH, and titrimetry analyses, the formation of sulfate anion and the presence of an excess of sulfuric acid were excluded. The thermal behavior and thermal stability of new molten salt are also studied and reported. (c) 2021 Elsevier B.V. All rights reserved. Elsevier 2021-07-05 Article PeerReviewed Zaharani, Lia and Khaligh, Nader Ghaffari and Johan, Mohd Rafie (2021) Synthesis, structure elucidation, vibrational and thermal behavior study of new one-core dication molten-salt. Journal of Molecular Structure, 1235. ISSN 0022-2860, DOI https://doi.org/10.1016/j.molstruc.2021.130134 <https://doi.org/10.1016/j.molstruc.2021.130134>. 10.1016/j.molstruc.2021.130134
institution Universiti Malaya
building UM Library
collection Institutional Repository
continent Asia
country Malaysia
content_provider Universiti Malaya
content_source UM Research Repository
url_provider http://eprints.um.edu.my/
topic QD Chemistry
spellingShingle QD Chemistry
Zaharani, Lia
Khaligh, Nader Ghaffari
Johan, Mohd Rafie
Synthesis, structure elucidation, vibrational and thermal behavior study of new one-core dication molten-salt
description We decided to conduct the acid-base reaction of piperazine and sulfuric acid as a secondary diamine and diprotic acid, respectively. A new molten salt was obtained, which its structure elucidation was performed by FTIR, 1D NMR, 2D NMR, and mass spectrometry. In contrast to previous reports and our expectation, no characteristic signal was detected for the existence of hydrogen sulfate anion in 1 H NMR of molten salt in DMSO-d(6). The H-1 NMR of reactants, the new molten salt, and another derivative of this molten salt analyzed in the same deuterated solvent. Further support for the formation of 1H,4H-piperazineN,N'-diium dication was concluded by an NMR study of its bromide derivative i.e., 1H,4H-piperazine-N,N'diium dibromide. Based on the results of FTIR, NMR, pH, and titrimetry analyses, the formation of sulfate anion and the presence of an excess of sulfuric acid were excluded. The thermal behavior and thermal stability of new molten salt are also studied and reported. (c) 2021 Elsevier B.V. All rights reserved.
format Article
author Zaharani, Lia
Khaligh, Nader Ghaffari
Johan, Mohd Rafie
author_facet Zaharani, Lia
Khaligh, Nader Ghaffari
Johan, Mohd Rafie
author_sort Zaharani, Lia
title Synthesis, structure elucidation, vibrational and thermal behavior study of new one-core dication molten-salt
title_short Synthesis, structure elucidation, vibrational and thermal behavior study of new one-core dication molten-salt
title_full Synthesis, structure elucidation, vibrational and thermal behavior study of new one-core dication molten-salt
title_fullStr Synthesis, structure elucidation, vibrational and thermal behavior study of new one-core dication molten-salt
title_full_unstemmed Synthesis, structure elucidation, vibrational and thermal behavior study of new one-core dication molten-salt
title_sort synthesis, structure elucidation, vibrational and thermal behavior study of new one-core dication molten-salt
publisher Elsevier
publishDate 2021
url http://eprints.um.edu.my/26972/
_version_ 1735409482539728896
score 13.211869

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