A NEW ELECTRONIC STATE IN TRANS-STILBENE

$^{1}$ B. R. Henry and W. Siebrand, J. Chem. Phys. 54, 1072 (1971). $^{2}$ F. Metz, S. Friedrich, and G. Hohlneicher, Chem. Phys. Lett. 16, 353 (1972). $^{3}$D. A. Antheunis, J. Schmidt, and J. H. van der Waals, Molec. Phys. 27, 1521 (1974).Author Institution: Student Learning Center, University of California; Department of Chemistry, Wayne State UniversityThe two-photon excitation spectrum (TPE) of trans-stilbene In liquid solution is presented in the total energy region $31 000-47 000 cm^{-1}$ using a laser pumped organic dye laser as the excitation source. A previously hidden electronic state is uncovered at $\sim 41 000$ $cm^{-1}$. An assignment of this state is made on the basis of the ratio of the spectrum taken with a circularly polarized source to that taken with a linearly polarized source