期刊
NEW JOURNAL OF CHEMISTRY
卷 45, 期 45, 页码 21151-21159出版社
ROYAL SOC CHEMISTRY
DOI: 10.1039/d1nj03498g
关键词
-
资金
- Natural Science Foundation of Shanghai [15ZR1428500]
The newly synthesized molecule PCBI based on the N-phenyl carbazole fluorescent group is used as a fluorescent probe for detecting N2H4 in aqueous solutions, showing excellent AIE effects and fluorescence response. The sensing mechanism is attributed to a change in molecular aggregation state and an induced charge transfer effect. The PCBI probe demonstrates good sensitivity and selectivity in detecting N2H4.
In this work, based on the N-phenyl carbazole fluorescent group, a new molecule named 2-(4-(9-phenyl-9H-carbazol-3-yl)benzylidene)-1H-indene-1,3(2H)-dione (PCBI) is firstly synthesized and used as a fluorescent probe for detecting N2H4 in aqueous solutions. The PCBI probe exhibits an excellent aggregation-induced emission (AIE) effect with a good fluorescence response to N2H4 in a DMF-H2O (f(w) = 90%) system. A fitting curve between the fluorescence intensity at 628 nm of probe and the concentration of N2H4 shows excellent linear in the range of 0-6 x 10(-6) mol L-1. Meanwhile, the PCBI probe exhibits good sensitivity and selectivity. Based on the density functional theory, the sensing mechanism of this probe is attributed to a change of the molecular aggregation state and an induced charge transfer (ICT) effect from group conversion. The PCBI test strip can be applied successfully to detect N2H4 rapidly in water.
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