Selective picomolar detection of mercury(II) using optical sensors.
The rational design of a mercury(II) ligand consisting in a 1-(4'-oxyphenyl)-4(1'-pyrenyl)-2,3-diaza-1,3-butadiene receptor unit, optimizes the sensitivity and reliability of a SPR sensor by the formation of a well packed SAM over the gold surface. SPR analysis allows detecting mercury(II) concentrations in aqueous systems in the picomolar range, meliorating on three orders of magnitude the EU mercury(II) detection limit in drinkable water.
Departament de Nanociència Molecular i Materials Orgànics, Institut de Ciència de Materials de Barcelona, Consejo Superior de Investigaciones Científicas (CSIC), Campus U.A.B., 08193 Bellaterra, Spain.
César
C
Díez-Gil
Rosario
R
Martínez
Imma
I
Ratera
Thomas
T
Hirsh
Arturo
A
Espinosa
Alberto
A
Tárraga
Pedro
P
Molina
Otto S
OS
Wolfbeis
Jaume
J
Veciana
D002070:Butadienes / Q000737:chemistry; D002413:Cations, Divalent / Q000032:analysis; D004326:Drinking; D008024:Ligands; D057230:Limit of Detection; D008628:Mercury / Q000032:analysis*; D020349:Surface Plasmon Resonance / Q000379:methods*; D013997:Time Factors; D014881:Water Supply / Q000032:analysis* / Q000592:standards
D002070:Butadienes; D002413:Cations, Divalent; D008024:Ligands; D008628:Mercury