Cruciforms' polarized emission confirms disjoint molecular orbitals and excited states |
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Authors: | Gard Matthew N Zucchero Anthony J Kuzmanich Gregory Oelsner Christian Guldi Dirk Dreuw Andreas Bunz Uwe H F Garcia-Garibay Miguel A |
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Affiliation: | Department of Chemistry, University of California, Los Angeles, California 90095-1559, USA. |
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Abstract: | Steady-state and time-resolved polarized spectroscopy studies reveal that electronic excitation to the third excited state of 1,4-distyryl-2,5-bis(arylethynyl)benzene cruciforms results in fluorescence emission that is shifted an angle of ca. 60°. This result is consistent with quantum chemical calculations of the lowest electronic excited states and their transition dipole moments. The shift originates from the disjointed nature of the occupied molecular orbitals being localized on the different branches of the cruciforms. |
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