Teams from Germany, the US and Finland have re-investigated the structure of a famous gold-phosphine-halide compound.
The ‘‘Schmid Au55’’ cluster, originally formulated as Au55(PPh3)12Cl6, is one of the first and probably most utilised gold nanoparticles. However, the team found that the most energetically favourable anion is
[Au69(PR3)20Cl12]-1. It is energetically and chemically superior to the standard models based on Au55(PR3)12X6.
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