119th General Meeting of the KCS

Type Oral Presentation
Area Oral Presentation of Young Scholars in Electrochemistry
Room No. 406호
Time THU 10:30-:
Code ELEC.O-7
Subject Electrochemiluminescence of Water-soluble Poly(amidoamine) Dendrimers Conjugated with Multiple Ru(II) Tris(bipyridine) Moieties
Authors 이혜인, 김주훈*
경희대학교 화학과, Korea
Abstract We reported intense electrochemiluminescence (ECL) of water-soluble [Ru(bpy)3]2+n–dendrimer (n = 7.5) conjugates which are tris(bipyridine)ruthenium(II) ([Ru(bpy)3]2+, where bpy = 2,2’-bipyridine)-functionalized poly(amidoamine) (PAMAM) dendrimers in the absence of any additional coreactant. [Ru(bpy)3]2+ was covalently conjugated to PAMAM dendrimers via reaction of [Ru(bpy)3]2+–NHS esters with terminal primary amines of dendrimers. We demonstrated the coreactant effect of Gn-NH2 (n = 2, 4, and 6) dendrimers for the ECL of [Ru(bpy)3]2+ where [Ru(bpy)3]2+/G4-NH2 system exhibited the largest ECL emission, which is ~23 times larger than that obtained in the absence of the dendrimers. It was also found that interior tertiary amine moieties of the dendrimer are primarily responsible for the coreactant effect of Gn-NH2 (n = 2, 4, and 6) dendrimers. Based on the considerable coreactant effect of G4-NH2 dendrimers, we synthesized [Ru(bpy)3]2+n–G4-NH2 dendrimer (n = 7.5) conjugates. The resulting water-soluble dendritic conjugates exhibited ~9-fold enhanced ECL intensity compared to ECL obtained from corresponding aqueous mixtures, including the same amounts of free G4-NH2 dendrimers and [Ru(bpy)3]2+ complexes.
E-mail hein225@naver.com