Quinoline Group Modified Carbon Nanotubes for the Detection of Zinc Ions.

Zhengping Dong,Bin Yang,Xing Zhong,Jing Li,Hongwei Kang,Rong Li,Jiantai Ma,Jun Jin

doi:10.1007/s11671-008-9248-8

Abstract

Carbon nanotubes (CNTs) were covalently modified by fluorescence ligand (glycine-N-8-quinolylamide) and formed a hybrid material which could be used as a selective probe for metal ions detection. The anchoring to the surface of the CNTs was carried out by the reaction between the precursor and the carboxyl groups available on the surface of the support. Fourier transform infrared spectroscopy (FTIR) and Thermogravimetric analysis (TGA) unambiguously proved the existence of covalent bonds between CNTs and functional ligands. Fluorescence characterization shows that the obtained organic–inorganic hybrid composite is highly selective and sensitive (0.2 μM) to Zn(II) detection.

Highlights

There has been growing interest during the last decade in the development of fluorescent molecular sensors for cations and anions in solution [1,2,3,4,5,6,7,8]
We find that this new material (MWNTs-GNQ) has high selectivity and sensitivity to detect Zn(II), and the sensitivity is down to Nanoscale Res Lett (2009) 4:335–340
Comparing with the Fourier transform infrared spectroscopy (FTIR) spectrum of GNQ, the characteristic peaks of amino groups in the spectrum of multi-walled carbon nanotubes (MWNTs)-GNQ disappeared, demonstrating that the amino groups on GNQ have reacted with acyl chloride groups on the surface of MWNTs

Summary

Introduction

There has been growing interest during the last decade in the development of fluorescent molecular sensors for cations and anions in solution [1,2,3,4,5,6,7,8]. Keywords Carbon nanotubes Á Glycine-N-8-quinolylamide Á Zn(II) Á Fluorescent material Á Detection These materials exhibit excellent selectivity and sensitivity to sense metal ions.

Results

Conclusion