Colorimetric response to mercury-induced abstraction of triethylene glycol ligands from a gold nanoparticle surface.
A simple method for specific colorimetric sensing of aqueous mercury(II) has been developed by using a gold nanoparticle supported by triethylene glycol ligand (Au:S-EG(3)). The unusual kinetic behavior of the sensing process of Hg(2+) and the TEM images of the Au core, as well as the electrospray ionization mass spectroscopic analysis of the analyte solution, have led us to propose a new color changing mechanism that involves ligand abstraction from a gold surface by Hg(2+).
Hirayama
Tasuku
T
Graduate School of Human & Environmental Studies, Kyoto University, Yoshida, Sakyo-ku, Kyoto, 606-8501, Japan.
Taki
Masayasu
M
Kashiwagi
Yukiyasu
Y
Nakamoto
Masami
M
Kunishita
Atsushi
A
Itoh
Shinobu
S
Yamamoto
Yukio
Y
D000042:Absorption; D003124:Colorimetry; D006046:Gold / Q000737:chemistry*; D008024:Ligands; D008628:Mercury / Q000032:analysis / Q000737:chemistry*; D053768:Metal Nanoparticles / Q000737:chemistry*; D011092:Polyethylene Glycols / Q000737:chemistry*; D013499:Surface Properties; D013997:Time Factors
D008024:Ligands; C028914:triethylene glycol; D011092:Polyethylene Glycols; D006046:Gold; D008628:Mercury