Photophysical and electrochemical properties of perylene monoimide alcohol ester derivatives

Abstract

The fluorescence quantum yield (Φf), molar extinction coefficient (ε), and electrogenerated chemiluminescence (ECL) of perylene monoimide alcohol ester derivatives (PMDs) were characterized by UV-Vis spectroscopy, fluorescence spectroscopy and cyclic voltammetry (CV) charge trapping technique under identical conditions. The results showed that the Φf values of n-propylPMI, ethylPMI and PMD(1~4) were 0.96, 0.98, 0.94, 0.93, 0.91 and 0.89. ECL test results displayed that the luminescence intensity of PMD-2 was the highest, followed by that of PMD-4. The anhydride bond esterification affected the fluorescence quenching less, and only the derivatives spectral peaks were shifted. In the CV curves of PMD(1~4) the oxidation peaks disappeared, and those of PMD-2, and PMD-4 exhibited only reduction peaks.

Keywords

• perylene alcohol ester imide
• fluorescence
• fluorescence quantum yield
• electrochemistry
• electrogenerated chemiluminescence