Sulfur Modification of Au via Treatment with Piranha Solution Provides Low-Pd Releasing and Recyclable Pd Material, SAPd
Journal of the American Chemical Society2010Vol. 132(21), pp. 7270–7272
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Naoyuki Hoshiya, Masahiko Shimoda, Hideki Yoshikawa, Yoshiyuki Yamashita, Satoshi Shuto, Mitsuhiro Arisawa
Abstract
We have found in the SR-HXPS measurement of Piranha-treated Au(111)/mica that the gold surface underwent sulfur modification during this treatment, which was believed to have only removed impurities from the gold surface. We also successfully developed a practical Pd material, SAPd, whose Pd was immobilized on sulfur-modified Au. With the lowest Pd-releasing levels and high recyclability, this is one of the best Pd materials thus far developed. Because it leaches extremely low levels of Pd into reaction mixtures, removal of the residual Pd is unnecessary using SAPd, even in syntheses involving pharmaceutical ingredients.
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