Journal
OPTICAL MATERIALS
Volume 123, Issue -, Pages -Publisher
ELSEVIER
DOI: 10.1016/j.optmat.2021.111834
Keywords
Fluorescent chemosensor; Cu2+ ion; Sensing mechanism; Phenanthro[9; 10-d]imidazole-derivative
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Funding
- National Natural Science Foundation [21373160, 21173165, 22001212, 20190026]
- State Key Laboratory of Struc-ture Chemistry [20190026]
- Guangdong Basic and Applied Basic Research Foundation [2019A1515110527]
- Natural Science Foun-dation of Chongqing, China in P. R. of China [cstc2020jcyj-msxmX0868]
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By molecular design, a new phenanthro[9,10-d]imidazole-based compound was synthesized, which exhibited strong emissive properties at 462 nm and showed a unique fluorescent turn-off for Cu2+ ion with a low detection limit. This study suggests that the phenanthro[9,10-d]imidazole-derivative could serve as a selective fluorescence and visual sensor platform for Cu2+ ion.
Through molecular design of a new phenanthro[9,10-d]imidazole-based compound, the probe 4-VB-PI-DMBA (4-VB-PI-DMBA = N,N-dimethyl-4-(1-(4- vinylbenzyl)-1H-phenanthro[9,10-d]imidazole-2-yl)aniline) strongly emissive at lambda em = 462 nm, is capable of the uniquely fluorescent turn-off for Cu2+ ion with a detection limit of 30.2 nM. This result shows that the phenanthro[9,10-d]imidazole-derivative with a twisting structure and without proton-donating groups, renders a selective fluorescence and visual sensor platform to Cu2+ ion.
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