An analytical method for detecting toxic metal cations using cyclotriveratrylene derivative capped gold nanoparticles

TETRAHEDRON LETTERS

卷:56

Article

Osner, Zachary R.¹  Holz, Richard C.²  Becker, Daniel P.¹ 

[1] Loyola Univ, Dept Chem & Biochem, Chicago, IL 60626 USA

[2] Marquette Univ, Dept Chem, Milwaukee, WI 53201 USA

关键词: Gold nanoparticles;    Supramolecular chemistry;    Heavy metal detection;    Lanthanides;    Cyclotriveratrylene;   

DOI  :  10.1016/j.tetlet.2015.08.005

来源: Elsevier

【 摘 要 】

Cyclotriveratrylene-oxime (CTV-oxime) derivatives that terminate with a dithiolate linker were synthesized enabling the supramolecular scaffold to adhere to gold nanoparticles (AuNPs) with the bowl-shaped cavity of the CTV scaffold exposed for utilization in host-guest chemistry. Exposure of these CTV functionalized AuNPs to varying concentrations of di- and trivalent metal cations resulted in the formation of large CTV-AuNP polymeric clusters and an accompanying a shift in the plasmon resonance. These interactions between the CTV-AuNPs and the metal cations in solution provides proof-of-concept that supramolecular functionalized AuNPs can be used as a simple and straightforward, on-site detection system for toxic metal cations in solution. The order of binding affinity of the metals studied based on observed K-d values is Cu2+> Zn2+> Pb2+> Hg2+> Eu3+ > Cd2+. (C) 2015 Elsevier Ltd. All rights reserved.

【 授权许可】

Free