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García Cuesta, Inmaculada; Sánchez de Merás, Alfredo; Koch, Henrik | |||
Aquest document és un/a article, creat/da en: 2003 | |||
Este documento está disponible también en : http://scitation.aip.org/getpdf/servlet/GetPDFServlet?filetype=pdf&id=JCPSA6000118000018008216000001&idtype=cvips&prog=normal&doi=10.1063/1.1565999 |
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Coupled cluster linear-response formalism has been used to compute the vertical spectrum of ethylene and tetracyanoethylene (TCNE). We show that for both molecules the ππ∗ excitation 1A1g→1B1u of the experimental spectrum is not vertical nor the 0-0 transition. For TCNE this excitation is the only experimentally observed band. We have computed vertical excitations of 5.2 eV in gas phase and 5.1 eV in acetonitrile and estimated a lower bound for the 0-0 transition in the gas phase of 4.3 eV. | |||
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