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On the Interplay Between Chirality and Exciton Coupling: A DFT Calculation of the Circular Dichroism in pi-Stacked Ethylene
Linköping University, Department of Physics, Chemistry and Biology, Computational Physics. Linköping University, The Institute of Technology.
Linköping University, Department of Physics, Chemistry and Biology, Computational Physics. Linköping University, The Institute of Technology.
2014 (English)In: Chirality, ISSN 0899-0042, E-ISSN 1520-636X, Vol. 26, no 9, 483-489 p.Article in journal (Refereed) Published
Abstract [en]

The chirality of stacked weakly interacting p-systems was interpreted in terms of Frenkel exciton states and the formation of excitonic circular dichroism (CD) bands was monitored for ethylene stacks of varying sizes. Convergence of CD bands with respect to the system size was observed for stacks involving around 10 molecules. By means of rotation around the C-C double bond in ethylene, chirality was induced in the monomeric system and which was shown to dominate the spectral responses, even for polymer aggregates. In helical assemblies of chiral entities, there will always be a mix of excitonic and monomeric contributions to the CD signal and it is demonstrated that the complex polarization propagator approach in combination with Density Functional Theory is a suitable method to address this situation.

Place, publisher, year, edition, pages
Wiley , 2014. Vol. 26, no 9, 483-489 p.
Keyword [en]
pi-stacked system; Density Functional Theory; excitonic circular dichroism
National Category
Physical Sciences
Identifiers
URN: urn:nbn:se:liu:diva-112060DOI: 10.1002/chir.22331ISI: 000343295600009PubMedID: 24839134OAI: oai:DiVA.org:liu-112060DiVA: diva2:763871
Note

Funding Agencies|Swedish Research Council [621-2010-5014]; SeRC (Swedish e-Science Research Center)

Available from: 2014-11-17 Created: 2014-11-13 Last updated: 2017-12-05

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Norman, PatrickLinares, Mathieu

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