Metal nanoclusters lie at the boundary between molecular species and nanoparticles and can provide insights into the origins of the optical, electronic and chemical properties of nanomaterials. The synthesis of metal nanoclusters ligated with various thiols has been explored in recent years, but the synthesis process is generally mediated by organic solvents, and as a result, the choice of thiol has been focused on those that can be dissolved in organic solvents only. This apparently limits the application of metal nanoclusters in biology and other field where water-solubility is critical. This work focuses on the synthesis of water-soluble Au25 cluster with high thermal stability. For this purpose the thiol (2S)-1-[(2S)-2-methyl-3-sulfanylpropanoyl] pyrrolidine-2-carboxylic acid (known as Captopril) is used as capping agent. The thermal stability and the chirality of this synthesized cluster have been compared with the previously reported Au25 cluster capped with other thiols. The Au25(Capt)18 exhibits enhanced stability and chiroptical property.

Synthesis of water soluble Au<sub>25</sub> cluster with high thermal stability

244th National Meeting (2012)

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Synthesis of water soluble Au25 cluster with high thermal stability

Synthesis of water soluble Au₂₅ cluster with high thermal stability