Anion-dependent Hg2Â +-sensing of colorimetric (dppe)Pt(dmit) chemosensor (dppe: 1,2-bis(diphenylphosphino)ethane; dmit: 1,3-dithiole-2-thione-4,5-dithiolate)

The solution colors of HgX2/(dppe)Pt(dmit) depend on the binding constant of (dppe)Pt (dmit)⋯ Hg2 +.209