Recognition of Potassium Ion in Water by 15-Crown-5 Functionalized Gold Nanoparticles
Citations Over TimeTop 10% of 2001 papers
Abstract
Reported here is an efficient recognition of K+ by 15-crown-5 functionalized gold nanoparticles in aqueous matrix containing physiologically important cations, such as Li+, Cs+, NH4+, Mg2+, Ca2+, and excess amount of Na+. Upon exposure to K+, the colloidal solution changes from red to blue, in response to surface plasmon absorption of dispersed and aggregated nanoparticles. The concentration ranges of K+ detected in this study are 0.099-0.48 mM and 7.6 microM-0.14 mM, when concentrations of colloidal gold are 54.9 and 7.1 nM, respectively. Recognition of K+ and formation of the aggregates are proposed via a sandwich complex of 2:1 between 15-crown-5 moiety and K+. Also discussed is the possibility of a preorganized structure of 15-crown-5 at the water-organic interface for the efficient complexation with K+.
Related Papers
- → Synthetic Approaches for the Construction of Five- and Six-Membered Silaazacycles(2022)15 cited
- → Synthesis and Shuttling Behavior of [2]Rotaxanes with a Pyrrole Moiety(2016)26 cited
- → Oxidation of Unsymmetrically Substituted Quaterthiophene with Two Terminal Ferrocenyl Groups(2009)11 cited
- Design, synthesis and evaluation of novel hydroxyethylamine derivatives with nitrogen heterocyclic moiety at N-terminal as BACE1 inhibitors(2010)
- STUDY ON INTRAMOLECULAR SYNERGISTIC INHIBITIVE EFFECTS OF BENZOTRIAZOLY MOIETY AND INIDAZOLY MOIETY(2009)