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7535388 
Journal Article 
SYNTHESIS AND FLUORESCENCE OF 9-BENZYL-9H-CARBAZOLE DERIVATIVES AND ITS APPLICATION FOR RECOGNITION OF RARE EARTH CATIONS 
Du, YuY; Han, LiMin; Guo, LWu; She, ZhiC; Cui, J; Lv, Li; Gao, RuoX; , 
2020 
Yes 
Heterocycles
ISSN: 0385-5414 
PERGAMON-ELSEVIER SCIENCE LTD 
OXFORD 
633-644 
WOS:000571526700009 
The synthesis and photophysical properties of 9-benzyl-9H-carbazole derivatives have been investigated. A novel ethyl 9-benzyl-1-methyl-9H-carbazole-2-carboxylate (Bncz 1) fluorescent chemosensor has been developed to recognize Ce(III) through a significant increase in fluorescence intensity in ethanol, whereas there is minimal difference on the introduction of the other rare earth metal cations (Yb3+, Sm3+, Gd3+, Er3+, Pr3+, Eu3+, Tb3+, Tm3+, Dy3+, Ho3+, Nd3+, Lu3+, Y3+, Sc3+, La3+). A moderate association constant of K = 2.4 19 x 10(5) L.mol(-1) has been determined by fluorescence titration, and the corresponding Job's plot analysis indicated 1:1 binding for metal complex formation. The linear increase in fluorescence intensity in response to different concentrations of Ce3+ gives a low limit of detection of 7.269 x 10(-6) M. 9-Benzyl-9H-carbazole derivative probe has a great potential for the detection of rare earth metal cations.