Ratiometric SERS detection of N₂H₄ by porous Ag(<scp>i</scp>)-linked Waugh-type polyoxometalate as an efficient label-free substrate

Abstract

A 3D silver(I)-polyoxometalate complex of Ag 6 [MnMo 9 O 32 ]·4H 2 O was designed to realize the the elusive label-free SERS quantitative analysis for hydrazine, by which the ratiometric I Mn-O / I Mo-O signals are proportional to hydrazine concentrations.