Directions of the Electronic Absorption Transition Moments in ͹-Substituted 4-Dimethylamino-trans-Styrenes

A. Kawski, Z. Gryczyński, I. Gryczyński, J. Kuśba

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Absorption transition moment directions of the diphenylphosphinyl (2a) and methylsulphonyl (3a) ͹-substtuted in 4-dimethylamino-trans-styrenes were determined in stretched poylvinyl alcohol (PVA) films based on measurements of the absorption anisotropies. It has been found that the long-wave absorption spectrum consists of two bands corresponding to differently directed transition moments. The transition moment of the intensive long-wave 1La band is lies along the long axis of these molecules whereas that of the short-wave 1Lbband is oriented at φ = 38° for 2a and φ= 35° for 3a relative to the transition moment direction of the 1Laband.

Original languageEnglish
Pages (from-to)471-474
Number of pages4
JournalZeitschrift fur Naturforschung - Section A Journal of Physical Sciences
Issue number3
StatePublished - 1 Mar 1992


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