Copper (II) chloride (CuCl2), sodium hydroxide (NaOH), ascorbic acid (C6H8O6), 4-mercaptopyridine (C5H5NS), thiophenol (C6H5SH), 2,6-dimethylbenzenethiol (C8H10S) and isopropanol (C3H8O) were purchased from Sigma-Aldrich. All chemicals were used directly without further purification. De-ionized water (DI water) was obtained from Millipore Q water purification system.
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