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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my.um.eprints.258902021-04-28T01:28:46Z http://eprints.um.edu.my/25890/ Synthesis, structure elucidation, vibrational and thermal behavior study of new one-core dication molten-salt Zaharani, Lia Khaligh, Nader Ghaffari Johan, Mohd Rafie QC Physics 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 1H NMR of molten salt in DMSO‑d6. The 1H 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-piperazine-N,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. © 2021 Elsevier B.V. Elsevier 2021 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. p. 130134. ISSN 0022-2860 https://doi.org/10.1016/j.molstruc.2021.130134 doi:10.1016/j.molstruc.2021.130134 |
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QC Physics 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 |
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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 1H NMR of molten salt in DMSO‑d6. The 1H 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-piperazine-N,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. © 2021 Elsevier B.V. |
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 |
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Elsevier |
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2021 |
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http://eprints.um.edu.my/25890/ https://doi.org/10.1016/j.molstruc.2021.130134 |
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