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Controllable Synthesis and Biological Application of Schiff Bases from d-Glucosamine and Terephthalaldehyde
[Image: see text] Theoretically, the two aldehydes of terephthalaldehyde (TPA) are equivalent, so the single or double Schiff base from TPA and d-glucosamine (Glc) may be formed at the same time. However, it is preferred to produce separately a single Schiff base (L(1)) or double Schiff base (L(2))...
Autores principales: | , , , , , , , |
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Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
American Chemical Society
2020
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Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7528290/ https://www.ncbi.nlm.nih.gov/pubmed/33015505 http://dx.doi.org/10.1021/acsomega.0c03591 |
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author | Weng, Qinghua Yi, Jinquan Chen, Xiaoping Luo, Dengwang Wang, Yaduan Sun, Weiming Kang, Jie Han, Zhizhong |
author_facet | Weng, Qinghua Yi, Jinquan Chen, Xiaoping Luo, Dengwang Wang, Yaduan Sun, Weiming Kang, Jie Han, Zhizhong |
author_sort | Weng, Qinghua |
collection | PubMed |
description | [Image: see text] Theoretically, the two aldehydes of terephthalaldehyde (TPA) are equivalent, so the single or double Schiff base from TPA and d-glucosamine (Glc) may be formed at the same time. However, it is preferred to produce separately a single Schiff base (L(1)) or double Schiff base (L(2)) for different synthesis systems of anhydrous methanol or water–methanol. We calculated the Δ(r)G of the formation of compounds L(1) and L(2) by density functional theory (DFT). In an anhydrous methanol system, the Δ(r)G values of L(1) and L(2) are both below zero and L(2) is lower, suggesting the spontaneous formation of the two Schiff bases. Though adjusting the molar ratio of Glc to TPA, L(1) and L(2) both were separately formed in anhydrous methanol. However, in the water–methanol system, L(2) was absent, which is most likely due to higher Δ(r)G (4.95 eV) and better water solubility. The results also exhibits that the positive charge of C in −CHO for TPA is smaller in a mixed solvent than that in methanol, which confirms that the nucleophilic reaction of the Schiff base is more difficult in a mixed solvent. Therefore, we could realize to control the synthesis of a pure single or double Schiff base from Glc and TPA by adjusting the molar ratio and solvent. The as-prepared two kinds of Schiff bases have strong optical properties, high bacteriostatic activity, and can be used as fluorescent probes for tumor cell imaging. |
format | Online Article Text |
id | pubmed-7528290 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2020 |
publisher | American Chemical Society |
record_format | MEDLINE/PubMed |
spelling | pubmed-75282902020-10-02 Controllable Synthesis and Biological Application of Schiff Bases from d-Glucosamine and Terephthalaldehyde Weng, Qinghua Yi, Jinquan Chen, Xiaoping Luo, Dengwang Wang, Yaduan Sun, Weiming Kang, Jie Han, Zhizhong ACS Omega [Image: see text] Theoretically, the two aldehydes of terephthalaldehyde (TPA) are equivalent, so the single or double Schiff base from TPA and d-glucosamine (Glc) may be formed at the same time. However, it is preferred to produce separately a single Schiff base (L(1)) or double Schiff base (L(2)) for different synthesis systems of anhydrous methanol or water–methanol. We calculated the Δ(r)G of the formation of compounds L(1) and L(2) by density functional theory (DFT). In an anhydrous methanol system, the Δ(r)G values of L(1) and L(2) are both below zero and L(2) is lower, suggesting the spontaneous formation of the two Schiff bases. Though adjusting the molar ratio of Glc to TPA, L(1) and L(2) both were separately formed in anhydrous methanol. However, in the water–methanol system, L(2) was absent, which is most likely due to higher Δ(r)G (4.95 eV) and better water solubility. The results also exhibits that the positive charge of C in −CHO for TPA is smaller in a mixed solvent than that in methanol, which confirms that the nucleophilic reaction of the Schiff base is more difficult in a mixed solvent. Therefore, we could realize to control the synthesis of a pure single or double Schiff base from Glc and TPA by adjusting the molar ratio and solvent. The as-prepared two kinds of Schiff bases have strong optical properties, high bacteriostatic activity, and can be used as fluorescent probes for tumor cell imaging. American Chemical Society 2020-09-16 /pmc/articles/PMC7528290/ /pubmed/33015505 http://dx.doi.org/10.1021/acsomega.0c03591 Text en This is an open access article published under an ACS AuthorChoice License (http://pubs.acs.org/page/policy/authorchoice_termsofuse.html) , which permits copying and redistribution of the article or any adaptations for non-commercial purposes. |
spellingShingle | Weng, Qinghua Yi, Jinquan Chen, Xiaoping Luo, Dengwang Wang, Yaduan Sun, Weiming Kang, Jie Han, Zhizhong Controllable Synthesis and Biological Application of Schiff Bases from d-Glucosamine and Terephthalaldehyde |
title | Controllable Synthesis and Biological
Application of Schiff Bases from d-Glucosamine and Terephthalaldehyde |
title_full | Controllable Synthesis and Biological
Application of Schiff Bases from d-Glucosamine and Terephthalaldehyde |
title_fullStr | Controllable Synthesis and Biological
Application of Schiff Bases from d-Glucosamine and Terephthalaldehyde |
title_full_unstemmed | Controllable Synthesis and Biological
Application of Schiff Bases from d-Glucosamine and Terephthalaldehyde |
title_short | Controllable Synthesis and Biological
Application of Schiff Bases from d-Glucosamine and Terephthalaldehyde |
title_sort | controllable synthesis and biological
application of schiff bases from d-glucosamine and terephthalaldehyde |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7528290/ https://www.ncbi.nlm.nih.gov/pubmed/33015505 http://dx.doi.org/10.1021/acsomega.0c03591 |
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