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Ab initio modeling of excited state absorption of polyenes
Royal Inst Technol, SE-10044 Stockholm, Sweden Ctr Chem, Dept Theoret Chem, SE-22100 Lund, Sweden Linkoping Univ, Dept Phys & Measurement Technol, SE-58183 Linkoping, Sweden.
Royal Inst Technol, SE-10044 Stockholm, Sweden Ctr Chem, Dept Theoret Chem, SE-22100 Lund, Sweden Linkoping Univ, Dept Phys & Measurement Technol, SE-58183 Linkoping, Sweden.
Linköping University, The Institute of Technology. Linköping University, Department of Physics, Chemistry and Biology, Computational Physics .
Royal Inst Technol, SE-10044 Stockholm, Sweden Ctr Chem, Dept Theoret Chem, SE-22100 Lund, Sweden Linkoping Univ, Dept Phys & Measurement Technol, SE-58183 Linkoping, Sweden.
2001 (English)In: Physical Chemistry, Chemical Physics - PCCP, ISSN 1463-9076, Vol. 3, no 13, 2567-2575 p.Article in journal (Refereed) Published
Abstract [en]

Vertical excitation energies and transition dipole moments between excited electronic states have been calculated for the trans-polyenes series C4H6-C12H14 in order to study the formation of excited state absorption spectra of these species. Quadratic response theory is applied in conjunction with the self-consistent field method and a hierarchical set of coupled-cluster methods. The convergence of the excited state absorption, with respect to wavefunction and treatment of electron correlation and also the length of the oligomer unit, is studied, revealing a considerable demand on the computational effort in order to predict the excited state spectra with precision. The organization of the excited states is found to change in character along the polyene series. The inflexion point for the vertical excitation energies between the one-photon allowed 1(1)B(u) and the two-photon 2(1)A(g) state is predicted to occur between hexatriene and octatetraene. Good agreement with experiment is obtained for butadiene and hexatriene for which the most accurate calculations have been carried out.

Place, publisher, year, edition, pages
2001. Vol. 3, no 13, 2567-2575 p.
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Engineering and Technology
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URN: urn:nbn:se:liu:diva-49214OAI: oai:DiVA.org:liu-49214DiVA: diva2:270110
Available from: 2009-10-11 Created: 2009-10-11 Last updated: 2011-01-13

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