Journal
JOURNAL OF THE AMERICAN CHEMICAL SOCIETY
Volume 127, Issue 6, Pages 2006-2011Publisher
AMER CHEMICAL SOC
DOI: 10.1021/ja044411h
Keywords
-
Categories
Ask authors/readers for more resources
A hydrogen-bond forming tris(amide) receptor based on cyclotriveratrylene (CTV) was prepared. Self-assembled monolayers; (SAMS) of the receptor were formed on gold surfaces. Desorption experiments show a surface coverage of 2.26 x 10(-10) Mol/cm(2). H-1 NMR and UV measurements confirm that the receptor exhibits the highest affinity for acetate ions among the anions studied. Electrochemical impedance was used to investigate anion sensing by the SAMS and proved to be an efficient and convenient technique for detecting anions in aqueous solutions. Upon binding acetate anions, the monolayer-modified gold electrodes show a drastic increase of the R-ct values when Fe(CN)(6)(3-)/(4-) is used as the redox probe. When the probe was changed to a positively charged one, Ru(NH3)(6)(3+/2+), the R-ct values decreased monotonically as the acetate concentration was increased, thus confirming the accumulation of negative surface charge upon anion binding. H2PO4- shows some interference when sensing AcO-. Other monovalent anions such as Cl-, Br-, NO3-, and HSO4- do not bind to the CTV receptor either in solution or on the surfaces.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available