Excitonic Model for Strongly Coupled Multichromophoric Systems : The Electronic Circular Dichroism Spectra of Guanine Quadruplexes as Test Cases
We here propose a general and flexible approach, based on fragment diabatization, which incorporates charge transfer states and significantly increases the reliability of excitonic Hamiltonians for systems where the chromophores are very close. This model (FrDEx) is used to compute the electronic circular dichroism and absorption spectra of two prototype guanine-rich DNA sequences folded in quadruple helices (GQs), i.e., a fragment of the human telomeric sequence (Tel21, antiparallel), and (TGGGGT)4 (TG4T, parallel). Calculations on different subsets of Tel21 and TG4T, from dimers to tetramers, show that FrDEx provides spectra close to the reference full quantum mechanical (QM) ones (obtained with time-dependent density functional theory), with significant improvements with respect to "standard" excitonic Hamiltonians. Furthermore, these tests enable the most cost-effective procedure for the whole GQ to be determined. FrDEx spectra of Tel21 and TG4T are also in good agreement with the QM and experimental ones and give access to interesting insights into the chemical-physical effects modulating the spectral signals. FrDEx could be profitably used to investigate many other biological and nanotechnological materials, from DNA to (opto)electronic polymers.
| Medienart: |
E-Artikel |
|---|
| Erscheinungsjahr: |
2021 |
|---|---|
| Erschienen: |
2021 |
| Enthalten in: |
Zur Gesamtaufnahme - volume:17 |
|---|---|
| Enthalten in: |
Journal of chemical theory and computation - 17(2021), 1 vom: 12. Jan., Seite 405-415 |
| Sprache: |
Englisch |
|---|
| Beteiligte Personen: |
Green, James A [VerfasserIn] |
|---|
| Links: |
|---|
| Themen: |
|---|
| Anmerkungen: |
Date Completed 14.06.2021 Date Revised 14.06.2021 published: Print-Electronic Citation Status MEDLINE |
|---|
| doi: |
10.1021/acs.jctc.0c01100 |
|---|
| funding: |
|
|---|---|
| Förderinstitution / Projekttitel: |
|
| PPN (Katalog-ID): |
NLM31942281X |
|---|
| LEADER | 01000naa a22002652 4500 | ||
|---|---|---|---|
| 001 | NLM31942281X | ||
| 003 | DE-627 | ||
| 005 | 20231225171419.0 | ||
| 007 | cr uuu---uuuuu | ||
| 008 | 231225s2021 xx |||||o 00| ||eng c | ||
| 024 | 7 | |a 10.1021/acs.jctc.0c01100 |2 doi | |
| 028 | 5 | 2 | |a pubmed24n1064.xml |
| 035 | |a (DE-627)NLM31942281X | ||
| 035 | |a (NLM)33378185 | ||
| 040 | |a DE-627 |b ger |c DE-627 |e rakwb | ||
| 041 | |a eng | ||
| 100 | 1 | |a Green, James A |e verfasserin |4 aut | |
| 245 | 1 | 0 | |a Excitonic Model for Strongly Coupled Multichromophoric Systems |b The Electronic Circular Dichroism Spectra of Guanine Quadruplexes as Test Cases |
| 264 | 1 | |c 2021 | |
| 336 | |a Text |b txt |2 rdacontent | ||
| 337 | |a ƒaComputermedien |b c |2 rdamedia | ||
| 338 | |a ƒa Online-Ressource |b cr |2 rdacarrier | ||
| 500 | |a Date Completed 14.06.2021 | ||
| 500 | |a Date Revised 14.06.2021 | ||
| 500 | |a published: Print-Electronic | ||
| 500 | |a Citation Status MEDLINE | ||
| 520 | |a We here propose a general and flexible approach, based on fragment diabatization, which incorporates charge transfer states and significantly increases the reliability of excitonic Hamiltonians for systems where the chromophores are very close. This model (FrDEx) is used to compute the electronic circular dichroism and absorption spectra of two prototype guanine-rich DNA sequences folded in quadruple helices (GQs), i.e., a fragment of the human telomeric sequence (Tel21, antiparallel), and (TGGGGT)4 (TG4T, parallel). Calculations on different subsets of Tel21 and TG4T, from dimers to tetramers, show that FrDEx provides spectra close to the reference full quantum mechanical (QM) ones (obtained with time-dependent density functional theory), with significant improvements with respect to "standard" excitonic Hamiltonians. Furthermore, these tests enable the most cost-effective procedure for the whole GQ to be determined. FrDEx spectra of Tel21 and TG4T are also in good agreement with the QM and experimental ones and give access to interesting insights into the chemical-physical effects modulating the spectral signals. FrDEx could be profitably used to investigate many other biological and nanotechnological materials, from DNA to (opto)electronic polymers | ||
| 650 | 4 | |a Journal Article | |
| 650 | 7 | |a Guanine |2 NLM | |
| 650 | 7 | |a 5Z93L87A1R |2 NLM | |
| 650 | 7 | |a DNA |2 NLM | |
| 650 | 7 | |a 9007-49-2 |2 NLM | |
| 700 | 1 | |a Asha, Haritha |e verfasserin |4 aut | |
| 700 | 1 | |a Santoro, Fabrizio |e verfasserin |4 aut | |
| 700 | 1 | |a Improta, Roberto |e verfasserin |4 aut | |
| 773 | 0 | 8 | |i Enthalten in |t Journal of chemical theory and computation |d 2005 |g 17(2021), 1 vom: 12. Jan., Seite 405-415 |w (DE-627)NLM169619249 |x 1549-9626 |7 nnns |
| 773 | 1 | 8 | |g volume:17 |g year:2021 |g number:1 |g day:12 |g month:01 |g pages:405-415 |
| 856 | 4 | 0 | |u http://dx.doi.org/10.1021/acs.jctc.0c01100 |3 Volltext |
| 912 | |a GBV_USEFLAG_A | ||
| 912 | |a GBV_NLM | ||
| 951 | |a AR | ||
| 952 | |d 17 |j 2021 |e 1 |b 12 |c 01 |h 405-415 | ||