]>Electrochemiluminescence Study of Europium (III) Complex with Coumarin3-Carboxylic Acid : Figure 6
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Figure 6: Photoluminescence ( 𝜆 e x c = 3 5 5  nm) and electrochemiluminescence spectra of Eu(C3CA ) 2 (N O 3 )( H 2 O ) 2 complex in aqueous solution. Experimental conditions: Al/A l 2 O 3 as a working electrode, Pt wire as a counter electrode, applied pulse voltage −50 V, frequency 40 Hz, pulse charge 30  𝜇 C, pH of solution 4.5, concentration of the complex 5 × 1 0 − 5  mol × dm−3.