Rhodamine-based ratiometric fluorescence sensing for the detection of mercury(II) in aqueous solution

Haizhu Liu, Ping Yu, Dan Du, Chunyan He, Bin Qiu, Xi Chen, Guonan Chen
Talanta 2010 April 15, 81 (1-2): 433-7
Novel ratiometric fluorescent silica nanoparticles with high selectivity towards Hg(2+) were synthesized for the detection of Hg(2+). Hg(2+) promoted the ring opening of spirolactam in the rhodamine moiety grafted onto the silica nanoparticles, resulting in a change in the fluorescence intensity. The fluorescence intensity was proportional to the Hg(2+) concentration, and the detection limit (S/N=3) for Hg(2+) was found to be 2.59 x 10(-9) mol L(-1) with a linear range from 0.4 to 8 x 10(-7) mol L(-1). In addition, the morphology of the silica nanoparticles, the effects of pH and co-existing substances, and the reversibility were investigated. The proposed approach was successfully applied to the determination of Hg(2+) in water samples.

Full Text Links

Find Full Text Links for this Article


You are not logged in. Sign Up or Log In to join the discussion.

Related Papers

Remove bar
Read by QxMD icon Read

Save your favorite articles in one place with a free QxMD account.


Search Tips

Use Boolean operators: AND/OR

diabetic AND foot
diabetes OR diabetic

Exclude a word using the 'minus' sign

Virchow -triad

Use Parentheses

water AND (cup OR glass)

Add an asterisk (*) at end of a word to include word stems

Neuro* will search for Neurology, Neuroscientist, Neurological, and so on

Use quotes to search for an exact phrase

"primary prevention of cancer"
(heart or cardiac or cardio*) AND arrest -"American Heart Association"