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    Hedgehog-shaped {Mo-368} cluster: unique electronic/structural properties, surfactant encapsulation and related self-assembly into vesicles and films

    Year: 2015

    Journal: SOFT MATTER, Vol. 11, p 2372-2378, 20170208

    Authors: Garai, Somenath; Merca, Alice; Bhowmik, Susovan; El Moll, Hani; Li, Haolong; Haso, Fadi; Nogueira, Helena; Liu, Tianbo; Wu, Lixin; Gouzerh, Pierre; Mueller, Achim

    Organizations: Univ Bielefeld, Fak Chem, D-33501 Bielefeld, Germany; Jilin Univ, Coll Chem, State Key Lab Supramol Struct & Mat, Changchun 130012, Peoples R China; Univ Akron, Dept Polymer Sci, Akron, OH 44325 USA; Univ Aveiro, CICECO, P-3810193 Aveiro, Portugal; Univ Aveiro, Dept Chem, P-3810193 Aveiro, Portugal; Univ Paris 06, Sorbonne Univ, Inst Parisien Chim Mol, UMR CNRS 8232, F-75005 Paris, France

    The hedgehog-shaped {Mo-368} cluster shows unique electronic (extremely high extinction coefficient) and structural features, especially regarding its size, the high number of delocalized electrons which allows to measure the surface enhanced Raman scattering (SERS) spectrum and the option for coordination chemistry inside the cavity. Its relative instability in aqueous solution can be overcome by embedment in a hydrophobic shell of dimethyldioctadecylammonium cations. The resulting hybrid self-assembles into spherical vesicles in acetone-water mixtures, according to a process directed by hydrophobic-hydrophilic interactions. It also forms rather stable Langmuir monolayers while a second layer evolves under higher surface pressure, in accordance with a rather low alkyl surface density.