YIN Fang-fang, ZHU Wei-ju, FANG Min etc. Visual Recognition for Hg<sup>2+</sup> and Ag<sup>+</sup> of Carbazole-thiourea Schiff Base Fluorescence Probe[J]. Chinese Journal of Luminescence, 2015,36(10): 1137-1144
YIN Fang-fang, ZHU Wei-ju, FANG Min etc. Visual Recognition for Hg<sup>2+</sup> and Ag<sup>+</sup> of Carbazole-thiourea Schiff Base Fluorescence Probe[J]. Chinese Journal of Luminescence, 2015,36(10): 1137-1144 DOI: 10.3788/fgxb20153610.1137.
Visual Recognition for Hg2+ and Ag+ of Carbazole-thiourea Schiff Base Fluorescence Probe
) containing carbazole was synthesized from carbazole derivative and 4-phenyl-3-amino thiourea as reagents. The structure of compound
L
was characterized by
1
H NMR and MS. The recognition performance and the binding mode of
L
and metal ions were investigated by UV-Vis and fluorescence spectroscopies. The results show that
L
has a quick visual selective recognition response to Hg
2+
and Ag
+
. The addition of metal ions caused the color of
L
changed from colorless to yellow
and it can be identified by the naked eyes. The fluorescence spectrum of
L
has different changes with the adding of Hg
2+
or Ag
+
to the solution. The presence of other ions does not interfere with the selective recognition of
L
for Hg
2+
and Ag
+
. It is also found that the binding model of
L
and Hg
2+
/Ag
+
for fluorescent recognition is different:
L
coordinates with Ag
+
to form complex which causes fluorescence quenching effect;
L
coordinates with Hg
2+
to form complex which causes fluorescence quenching effect
then the complex removes HgS to produce a new compound.
关键词
Keywords
references
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