Eu3+ complex of ligand4'-(4-carboxyphenyl)-2,2':6',2''-terpyridine as fluorosensor of heavy metals

International Symposium on Current Progress in Functional Materials

Zulys, A.^1 ; Rachmawati, N.^1

Department of Chemistry, Faculty of Mathematics, Natural Sciences Universitas Indonesia, Kampus UI Depok, Depok

16424, Indonesia^1

关键词: Elemental analyzers;    Fluorescence intensities;    Fluorosensors;    Hcptpy;    Hydrothermal process;    Terpyridines;    Turn offs;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/188/1/012007/pdf
DOI  :  10.1088/1757-899X/188/1/012007

来源: IOP

【 摘 要 】

Ligand 4'-(4-carboxyphenyl)-2,2':6',2″-terpyridine (2-Hcptpy) has been synthesized by modification of Kröhnke method. The synthesize was performed using aldol condensation reaction. The white precipitate was collected and produced 62% yield (1.062 gr). Ligand 2-Hcptpy has been characterized by FTIR, Elemental analyzer, H-NMR, UV-vis, and UV-DRS spectrometer. It was then reacted with lanthanide group (Eu3+) to form a complex by hydrothermal process. The result of Eu3+complex was 0.352 gr. of white yellowish precipitate. The application of this research is for the fluorosensor of heavy metals (Pb2+dan Cd2+). The data of fluorescence showed two types of fluorescence, either turn on or turn off fluorosensor. Ligand 2-Hcptpy has an on-off type with the addition of Pb2+and Cd2+, while complex Eu3+has two types of fluorosensor. The complex showed turn on-off and turn on-off by addition of Pb2+and type of turn off by addition of Cd2+. Either ligand or complex, showed fluorescence intensity by adding heavy metals up to concentration 5×10-8M.