Recognition of cations by self-assembled monolayers of crown ethers

Share/Save/Bookmark

Flink, Simon and Veggel van, Frank C.J.M. and Reinhoudt, David N. (1999) Recognition of cations by self-assembled monolayers of crown ethers. Journal of physical chemistry B, 103 (31). pp. 6515-6520. ISSN 10895647

[img]PDF
Restricted to UT campus only
: Request a copy
64Kb
Abstract:Self-assembled monolayers (SAMs) of crown ether adsorbates on gold reversibly bind metal ions from aqueous solutions. The resulting changes of the electrochemical properties of the monolayers were monitored by impedance spectroscopy. The increased dielectric constant of the layer due to the complexation of ions results in an increase of the monolayer capacitance (CML). Analysis of the response curves with a Langmuir isotherm enables the determination of association constants of the SAMs with various metal ions. The cation binding also influences the charge-transfer resistance (RCT) of a redox couple Ru(NH3)62+/3+ in the electrolyte. Comparison of both responses allows an accurate interpretation of the origin of the resistive response. Furthermore, the association constants enable the quantitative determination of interactions between SAMs and metal ions, using either capacitive or resistive responses.
Item Type:Article
Copyright:© 1999 American Chemical Society
Research Group:
Link to this item:http://purl.utwente.nl/publications/11619
Official URL:http://dx.doi.org/10.1021/jp990014v
Export this item as:BibTeX
EndNote
HTML Citation
Reference Manager

 

Repository Staff Only: item control page

Metis ID: 106253