UV–Vis, IR spectra, mass spectrometry and thermal studies of charge transfer complexes formed in the reaction of 1, 4, 8, 11-tetraazacyclotetradecane with π-electron acceptors
| Autor: | Adel Mostafa, Joelle Fadlallah, Siham Y. AlQaradawi, Sherzod T. Madrahimov |
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| Rok vydání: | 2019 |
| Předmět: |
Materials science
TBCHD Infrared spectroscopy Electron donor 02 engineering and technology DDQ 010402 general chemistry Mass spectrometry 01 natural sciences TACTD chemistry.chemical_compound TFQ Materials Chemistry Physical and Theoretical Chemistry Spectroscopy chemistry.chemical_classification Spectra Electron acceptor Molar absorptivity 021001 nanoscience & nanotechnology Condensed Matter Physics Atomic and Molecular Physics and Optics 0104 chemical sciences Electronic Optical and Magnetic Materials chemistry Stability constants of complexes Physical chemistry Ionization energy 0210 nano-technology Stoichiometry |
| Zdroj: | Journal of Molecular Liquids. 284:616-624 |
| ISSN: | 0167-7322 |
| Popis: | The solid charge-transfer (CT) molecular complexes formed in the reaction of the electron donor 1,4,8,11-tetraazacyclotetradecane (TACTD) with the π-electron acceptors 2,4,6-tetrafluoro-1,4-benzoquinone (TFQ), 2,3-dichloro-5,6-dicyano-1,4-benzoquinone (DDQ) and 2,4,4,6-tetrabromo-2,5-cyclohexadienone (TBCHD) have been investigated spectrophotometrically in chloroform at 25 °C. These were characterized through electronic and infrared spectra as well as elemental and thermal analysis. The obtained results showed that the formed solid CT-complexes have the formulas [(TACTD)(TFQ)2] and [(TACTD)(DDQ)2] and [(TACTD)(TBCHD)2] in full agreement with the known reaction stoichiometry in solution as well as the elemental measurements. The formation constant kCT, molar extinction coefficient eCT, free energy change ΔG0, CT energy ECT and the ionization potential Ip have been calculated for these CT-complexes. |
| Databáze: | OpenAIRE |
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