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DC Field | Value | Language |
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dc.contributor.author | Kruk, M. M. | en |
dc.contributor.author | Vershilovskaya, I. V. | en |
dc.contributor.author | Ngo, T. | en |
dc.contributor.author | Scheblykin, I. G. | en |
dc.contributor.author | Dehaen, W. | en |
dc.contributor.author | Maes, W. | en |
dc.date.accessioned | 2017-05-31T11:14:20Z | - |
dc.date.available | 2017-05-31T11:14:20Z | - |
dc.date.issued | 2016 | - |
dc.identifier.citation | Free base and protonated form fluorescence of the mixed 5,10,15,20-arylporphyrins / M. M. Kruk [et al.] // Proceedings of BSTU. No. 4. – Minsk : BSTU, 2016. – P. 12-15 | en |
dc.identifier.uri | https://elib.belstu.by/handle/123456789/20915 | - |
dc.description.abstract | Fluorescence spectra for a series of mixed phenyl-mesityl 5,10,15,20-tetraarylporphyrins – with Mes4, Mes3Ph, Mes2Ph2- trans, Mes2Ph2- cis, MesPh 3 and Ph4 type architecture (Mes – mesityl, Ph – phenyl) – in their free base, mono- and diprotonated form are reported. Substitution of a single mesophenyl group with a sterically more demanding mesityl group is found to be sufficient to provide stabi-lization of the monoprotonated porphyrin species. A decrease in the number of mesityl substituents in the macrocycle leads to a decrease in the fluore scence quantum yield for protonated forms. The pro-gressive replacement of ortho,ortho’-substituted mesityl groups with unhindered phenyls results in the additive pattern of spectral changes for the free base porphyrins, whereas for both protonated species a specific jump at the trans to cis transition is observed, along with a gradual additive pattern before and afterwards. This feature is interpreted as a signature of the transition between the hindered-like and un-hindered-like conformations of the tetrapyrrolic m acrocycles in the protonated forms. These two mo-lecular conformations provide a different interaction of the two one-electron (a1u,eg) and (a2u,eg) configurations, which leads to changes of their contributions into electronic transitions. | en |
dc.format.mimetype | application/pdf | en |
dc.language.iso | en | en |
dc.publisher | BSTU | en |
dc.subject | порфирины | ru |
dc.subject | свободные основания | ru |
dc.subject | протонированные формы | ru |
dc.subject | молекулярная конформация | ru |
dc.subject | флуоресценция | ru |
dc.title | Free base and protonated form fluorescence of the mixed 5,10,15,20-arylporphyrins | en |
dc.type | Article | en |
Appears in Collections: | 2016, № 4 |
Files in This Item:
File | Description | Size | Format | |
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Kruk.Free base.pdf | 650.5 kB | Adobe PDF | View/Open |
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