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Excited singlet states of "hairpin" polyenes

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Froelich, Wolfgang ; Dewey, Harry J. ; Deger, Hans ; Dick, Bernhard ; Klingensmith, Kenneth A. ; Puettmann, Wilhelm ; Vogel, Emanuel ; Hohlneicher, Georg ; Michl, Josef
Date of publication of this fulltext: 05 Aug 2009 13:50


The synthesis and UV-visible, polarized-fluorescence and MCD spectra of 6 U-shaped hairpin polyenes (e.g., I) are reported. Qual. arguments and results of p-electron calcns. permit the identification of 4 excited singlet states and their assignment to mixts. of singly and doubly excited configurations. The hairpin polyenes represent a link between the all-trans-polyenes on the 1 hand and the ...


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