Highly selective and reversible colorimetric detection of mercury ions by a hydrophilic cycloruthenated complex in water

摘要: Abstract A new hydrophilic cyclometallated ruthenium complex Ru1-B with 4,4′-dicarboxylate-2,2′-bipyridine (abbreviated as dcbpy) and 2-(2-thienyl)pyridine thpy) ligands was successfully synthesized to selectively detect mercury ion in water. Only upon addition of ions, the aqueous solution exhibits very remarkable color change from red yellow a dramatic blue-shift (120 nm) MLCT absorption bands. The detection limit Hg 2+ for this chemo-sensor HEPES 0.59 μM. Interestingly, can be recovered complex-Hg both silica gel plates by adding I − . Therefore, it used sensitive “naked-eye” indicator natural environment.