Figure 3.

Fluorescence excitation and emission spectra of 4-cis hexadecaheptaene in n- pentadecane at 77 K. The fluorescence spectrum was obtained by exciting at 411 nm, and the fluorescence excitation spectrum was monitored at 594 nm. Maximum absorbances of ~0.10 minimized the effects of self-absorption. Fluorescence intensities were corrected for the different room temperature absorbances of the two samples at the excitation wavelengths. Spectra were acquired with 1-nm bandpasses.