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大学・研究所にある論文を検索できる 「Potential-modulated electrochemiluminescence of a tris(2,2′-bipyridine) ruthenium(II) / lidocaine system under 430 kHz ultrasound irradiation」の論文概要。リケラボ論文検索は、全国の大学リポジトリにある学位論文・教授論文を一括検索できる論文検索サービスです。
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Potential-modulated electrochemiluminescence of a tris(2,2′-bipyridine) ruthenium(II) / lidocaine system under 430 kHz ultrasound irradiation

Takahashi, Fumiki Shimizu, Ryo Nakazawa, Tomoyuki Jin, Jiye 信州大学 DOI:10.1016/j.ultsonch.2019.104947

2021.12.09

概要

The electrochemiluminescence (ECL) of tris(2,2′-bipyridine)ruthenium(II) (Ru(bpy) 2+) in the presence of li- docaine was investigated under ultrasound (US) irradiation. The sonoelectrochemical experiments are conducted by indirect irradiation of ultrasound with a piezoelectric transducer operating at 430 kHz. In a supporting electrolyte at pH 11, the Ru(bpy)32+/lidocaine system gave weak ECL peaks around +1.2 V and +1.45 V, respectively. The ECL signal at +1.2 V was attributed to redox reactions of the oxidative intermediates of Ru (bpy) 2+ and lidocaine, while the signal at +1.45 V was assumed to be caused by an advanced oxidation process due to the generation of hydroxyl radicals (%OH) at the electrode surface. In this study, the potential modulation approach is employed in the study of ECL process upon US irradiations because it can suppress the noise components from sonoluminescence effectly and improve the resolution of ECL-potential profiles. It is found ECL signals were greatly enhanced upon US irradiation at the output power of 30 W, however, the relative intensity of ECL signal at +1.2 V was larger than that obtained with a rotating disk electrode even though the mass transport effect is equilvalent. The experiment results suggest that the chemical effect (i.e., generation of %OH) by 430 kHz US becomes remarkable in the electrochemical process. Detailed ECL reaction routes under US are proposed in this study.

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