Abstract
The green emission from pyrene excimer has been observed usually in the electrochemiluminescence (ECL) of pyrene. The red emission, however, is observed additionally at low concentration. The ECL of pyrene at low concentration in dimethylformamide (DMF) is investigated at various temperatures between room temperature and −51°C. The red emission with a maximum about at 600 nm is observed predominantly at low temperature, and it has almost the same spectrum as the phosphorescence of pyrene. The current‐potential curves and emission‐potential curves are measured for these cases. The red ECL can be concluded to be the phosphorescence from the triplet state of pyrene and a probable mechanism is proposed for it.
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