Abstract

AbstractA terpyridine derivative DPTP [di‐(4‐methylphenyl)‐2,2′:6′,2′ ′‐terpyridine] was conveniently synthesized from 2‐bromopyridine via halogen‐dance reaction, Kharash coupling and Stille coupling reaction. Then its corresponding ruthenium complex Ru‐DPTP [N,N,N‐4,4′′‐di‐(4‐methylphenyl)‐2,2′:6′,2′′‐terpyridine‐N,N,N‐tris(iso‐thiocyanato)‐ruthenium(II) ammonium] was obtained and fully characterized by IR, UV‐Vis, ESI MS and elemental analysis. The MLCT absorption band of Ru‐DPTP was blue‐shifted from 570 to 500 nm upon addition of Hg2+. Among a series of surveyed metal ions, the complex showed a unique recognition to Hg2+, indicating that it can be used as a selective colorimetric sensor for Hg2+.

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