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129th General Meeting of Korean Chemical Society & Exposition Photoluminescence and electrochemiluminescence properties of Au(I)-glutathione complexes depending on pH conditions

Submission Date :
2 / 28 / 2022 , 11 : 00 : 03
Abstract Number :
Presenting Type:
Oral Presentation
Presenting Area :
Analytical Chemistry - Oral Presentation of Young Analytical Chemists II
Authors :
Jeongyun Choi, Joohoon Kim*
Department of Chemistry, Kyung Hee University, Korea
Assigned Code :
ANAL2.O-23 Assigend Code Guideline
Presenting Time :
FRI, 10 : 28
Electrochemiluminescence (ECL) is an electrochemical phenomenon in which electrochemically-generated species undergo electron transfer reactions to produce excited species emitting light at electrodes. The ECL has the advantages of high sensitivity and low background noise, and thus has been used in various fields such as biosensing, clinical diagnosis, environmental monitoring. In this study, we synthesized Au(I)-glutathione complexes under different pH conditions, then compared their ECL properties as well as photoluminescence (PL) properties. Glutathione is a tripeptide having two carboxyl groups and one amine group. As pH conditions change, Au(I)-glutathione complexes undergo a reversible assembly-disassembly process due to the functional groups of glutathione. Therefore, the aggregation extent of the Au(I)-glutathione complexes varies depending on the pH conditions. Because the aggregation of the Au(I)-glutathione complexes results in the aggregation-induced emission (AIE) of the complexes, we demonstrated different ECL and PL behaviors of the Au(I)-glutathione complexes depending on the pH conditions.