Chadha, Ridhima; Das, Abhishek; Debnath, Anil K.; Kapoor, Sudhir; Maiti, Nandita published the artcile< 2-thiazoline-2-thiol functionalized gold nanoparticles for detection of heavy metals, Hg(II) and Pb(II) and probing their competitive surface reactivity: A colorimetric, surface enhanced Raman scattering (SERS) and x-ray photoelectron spectroscopic (XPS) study>, Recommanded Product: 4,5-Dihydrothiazole-2-thiol, the main research area is colorimetry SERS 2thiazoline2thiol gold nanoparticles heavy metals surface reactivity.
A novel 2-thiazoline-2-thiol functionalized gold (Au-TT) nanosensor was developed for the selective and sensitive detection of toxic heavy metal ions, Hg(II) and Pb(II) by colorimetry, and for studying its competitive surface reactivity using SERS and XPS. The detection mechanism and surface reactivity is based on competitive binding affinity of thiocarbonyl S or thiazoline ring N/S atom with the metal ions and the nanoparticles (NPs). Due to diff ;erences in the binding affinities of the metal ions towards the active binding sites of TT, addition of different metal ions resulted in variation of color and SERS spectral features. Of the various metal ions studied, viz. Cu(II), Cd(II), Co(II), Zn(II), Ni(II), Hg(II), Pb(II), Ca(II), Fe(II), Mn(II) and Sn(II), only Hg(II) and Pb(II) showed distinctive colorimetric and SERS spectral response that was quantified using XPS. This study, thus, realizes a selective and sensitive visual based nanosensor for Hg(II) and Pb(II) with limit of detection (LOD) of ∼ 0.1 ppm. SERS revealed the formation of Hg(TT)2 and Pb(TT)2 complexes on the Au NPs surface with the former remaining bonded to the NPs, resulting in enhanced Raman intensity for the 1026 cm-1 band, while the latter gets desorbed from the surface leading to reduced SERS intensity.
Colloids and Surfaces, A: Physicochemical and Engineering Aspects published new progress about Affinity. 96-53-7 belongs to class thiazole, and the molecular formula is C3H5NS2, Recommanded Product: 4,5-Dihydrothiazole-2-thiol.
Referemce:
Thiazole | C3H3NS – PubChem,
Thiazole | chemical compound | Britannica