Switching the recognition preference of rhodamine B spirolactam by replacing one atom: design of rhodamine B thiohydrazide for recognition of Hg(II) in aqueous solution.
A new chemosensor based on rhodamine B thiohydrazide is described. Chemosensor B was found to show a reversible dual chromo- and fluorogenic response toward Hg2+ in aqueous solution in a highly selective and sensitive manner. This was suggested to result from the coordination of Hg2+ at the N, S binding sites in B to open its spiro ring.
Key Laboratory of Analytical Sciences, Ministry of Education, and Department of Chemistry, College of Chemistry and Chemical Engineering, Xiamen University, Xiamen 361005, China. hzheng@xmu.edu.cn
Hong
H
Zheng
Zhen-Hua
ZH
Qian
Lei
L
Xu
Fang-Fang
FF
Yuan
Li-Dan
LD
Lan
Jin-Gou
JG
Xu
D001665:Binding Sites; D005456:Fluorescent Dyes / Q000737:chemistry*; D006834:Hydrazines / Q000737:chemistry*; D007769:Lactams / Q000737:chemistry; D008628:Mercury / Q000737:chemistry*; D008958:Models, Molecular; D012235:Rhodamines / Q000737:chemistry*; D013141:Spiro Compounds / Q000737:chemistry*; D014867:Water / Q000737:chemistry
D005456:Fluorescent Dyes; D006834:Hydrazines; D007769:Lactams; D012235:Rhodamines; D013141:Spiro Compounds; C514777:rhodamine B thiohydrazide; D014867:Water; D008628:Mercury; C029773:rhodamine B