Delayed S1→S0 AND S2→S0 fluorescence, delayed excimer fluorescence, and phosphorescence from biphenylene

摘要

In liquid solution, the population of the metastable triplet state of biphenylene by triplet energy transfer from a triplet sensitizer leads to different types of delayed luminescence from biphenylene: delayed S1→S0 and S2→S0 fluorescence and delayed excimer fluorescence due to triplet-triplet annihilation, and phosphorescence. All four delayed luminescences have been observed for the first time.