Keto-enol tautomerism in new silatranes Schiff bases tailed with different substituted salicylic aldehyde
| Autor: | Angelica Vlad, Alexandra Bargan, Alina Soroceanu, Mihaela Dascalu, Maria Cazacu, Sergiu Shova, Ana-Maria-Corina Dumitriu, Mirela-Fernanda Zaltariov, Cristian-Dragos Varganici, Ana-Maria Macsim |
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| Rok vydání: | 2020 |
| Předmět: |
chemistry.chemical_classification
Thermogravimetric analysis General Chemical Engineering Infrared spectroscopy Sorption 02 engineering and technology General Chemistry Keto–enol tautomerism 010402 general chemistry 021001 nanoscience & nanotechnology 01 natural sciences Aldehyde 0104 chemical sciences lcsh:Chemistry chemistry.chemical_compound Differential scanning calorimetry lcsh:QD1-999 chemistry Salicylaldehyde Atom Polymer chemistry 0210 nano-technology |
| Zdroj: | Arabian Journal of Chemistry, Vol 13, Iss 1, Pp 3100-3111 (2020) |
| ISSN: | 1878-5352 |
| DOI: | 10.1016/j.arabjc.2018.09.001 |
| Popis: | New Schiff base-type products starting from 1-(3-aminopropyl)silatrane and three derivatives of salicylaldehyde having as substituents 3,5-dichloro- (1), 3-methoxy- (2) and 3,5-di-tert-butyl- (3), respectively were obtained and isolated with high yields (78–87%) in pure, crystalline forms and their structures were established by different methods. The molecular electronic transitions of the compounds in solvents with various polarities were investigated by UV–Vis spectral analysis. Their thermal behavior was studied by thermogravimetric analysis and differential scanning calorimetry, results of the latter highlighting thermocromism of the compounds, proved by the appearance of IR absorption bands specific for enolic form at the temperature corresponding to each sample. The moisture sorption capacity and stability of the compounds in wet environment were investigated by vapor sorption analysis in dynamic regime and IR spectroscopy. The biological activity was assessed by specific tests. All results were discussed in correlation with the nature of substituents and structures formed. The chemical handling of the silatrane tail, by using different substituents on the silicon atom would allow fine tuning of the compounds properties. Keywords: Aminopropylsilatrane, Schiff base modified silatranes, Single crystal X-ray, Azomethine, Antimicrobial activity, Surface properties |
| Databáze: | OpenAIRE |
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