Properties of the excited electronic states of guanine quartet complexes with alkali metal cations
G-quartets are supra-molecular structures that consist of four guanine molecules connected by eight hydrogen bonds. They are additionally stabilized by metal cations. In this contribution, the excited states of G-quartet and its complexes with lithium, sodium and potassium were studied by employing...
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| Format: | Article |
| Language: | English |
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Serbian Chemical Society
2020-01-01
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| Series: | Journal of the Serbian Chemical Society |
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| Online Access: | http://www.doiserbia.nb.rs/img/doi/0352-5139/2020/0352-51391900140M.pdf |
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| author | Milovanović Branislav Ž. Petković Milena M. Etinski Mihajlo R. |
| author_facet | Milovanović Branislav Ž. Petković Milena M. Etinski Mihajlo R. |
| author_sort | Milovanović Branislav Ž. |
| collection | DOAJ |
| description | G-quartets are supra-molecular structures that consist of four guanine molecules connected by eight hydrogen bonds. They are additionally stabilized by metal cations. In this contribution, the excited states of G-quartet and its complexes with lithium, sodium and potassium were studied by employing time-dependent density functional theory. The findings indicate that vertical excitations from the optimized ground state involve transitions from several bases, whereas excitations from the optimized lowest excited state include transitions from one base. The charge-transfer character of these states was analyzed. It was shown that the cations are able to modify positions of the maxima of the fluorescence spectra of the complexes. [Project of the Serbian Ministry of Education, Science and Technological Development, Grant no. 451-03-68/2020-14/200146] |
| first_indexed | 2024-12-12T21:20:31Z |
| format | Article |
| id | doaj.art-5d0f20d5a05f4e8eb92bd155e4142b5a |
| institution | Directory Open Access Journal |
| issn | 0352-5139 1820-7421 |
| language | English |
| last_indexed | 2024-12-12T21:20:31Z |
| publishDate | 2020-01-01 |
| publisher | Serbian Chemical Society |
| record_format | Article |
| series | Journal of the Serbian Chemical Society |
| spelling | doaj.art-5d0f20d5a05f4e8eb92bd155e4142b5a2022-12-22T00:11:35ZengSerbian Chemical SocietyJournal of the Serbian Chemical Society0352-51391820-74212020-01-018581021103210.2298/JSC191025140M0352-51391900140MProperties of the excited electronic states of guanine quartet complexes with alkali metal cationsMilovanović Branislav Ž.0Petković Milena M.1Etinski Mihajlo R.2University of Belgrade, Faculty of Physical Chemistry, Belgrade, SerbiaUniversity of Belgrade, Faculty of Physical Chemistry, Belgrade, SerbiaUniversity of Belgrade, Faculty of Physical Chemistry, Belgrade, SerbiaG-quartets are supra-molecular structures that consist of four guanine molecules connected by eight hydrogen bonds. They are additionally stabilized by metal cations. In this contribution, the excited states of G-quartet and its complexes with lithium, sodium and potassium were studied by employing time-dependent density functional theory. The findings indicate that vertical excitations from the optimized ground state involve transitions from several bases, whereas excitations from the optimized lowest excited state include transitions from one base. The charge-transfer character of these states was analyzed. It was shown that the cations are able to modify positions of the maxima of the fluorescence spectra of the complexes. [Project of the Serbian Ministry of Education, Science and Technological Development, Grant no. 451-03-68/2020-14/200146]http://www.doiserbia.nb.rs/img/doi/0352-5139/2020/0352-51391900140M.pdfdensity functional theoryg-quadruplexfluorescence |
| spellingShingle | Milovanović Branislav Ž. Petković Milena M. Etinski Mihajlo R. Properties of the excited electronic states of guanine quartet complexes with alkali metal cations Journal of the Serbian Chemical Society density functional theory g-quadruplex fluorescence |
| title | Properties of the excited electronic states of guanine quartet complexes with alkali metal cations |
| title_full | Properties of the excited electronic states of guanine quartet complexes with alkali metal cations |
| title_fullStr | Properties of the excited electronic states of guanine quartet complexes with alkali metal cations |
| title_full_unstemmed | Properties of the excited electronic states of guanine quartet complexes with alkali metal cations |
| title_short | Properties of the excited electronic states of guanine quartet complexes with alkali metal cations |
| title_sort | properties of the excited electronic states of guanine quartet complexes with alkali metal cations |
| topic | density functional theory g-quadruplex fluorescence |
| url | http://www.doiserbia.nb.rs/img/doi/0352-5139/2020/0352-51391900140M.pdf |
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