Journal
JOURNAL OF MATERIALS CHEMISTRY C
Volume 4, Issue 2, Pages 383-390Publisher
ROYAL SOC CHEMISTRY
DOI: 10.1039/c5tc02865e
Keywords
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Funding
- National Natural Science Foundation of China [51173050, 81271642]
- Natural Science Foundation of Guangdong Province [2015A030313205]
- Science and Technology Program of Guangdong Province [2015A010105010]
- Special Project on the Integration of Industry, Education and Research of Guangdong Province [2012A090300004]
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A novel fluorescence chemosensor 1 with aggregation-induced emission was designed and synthesized through a nucleophilic addition reaction between cyanide and triphenylamine. It exhibited remarkable selectivity and high sensitivity and was able to detect Fe3+, CN- and SO32- in almost pure aqueous solution with low detection limits of 1.44 mu M, 9.88 nM and 0.107 mu M, respectively. Job's plot and H-1 NMR data showed that the binding stoichiometry of 1 with Fe3+, CN- or SO32- was 1:1. Further observations of H-1 NMR titration suggested that a coordination bond was formed between two cyano of 1 and Fe3+ which resulted in fluorescence quenching of 1 after detection of Fe3+, whereas the nucleophilic addition of cyanide or sulfite to the vinyl group was responsible for the fluorescent quenching of CN- or SO32- toward 1. The biological applications of 1 were also evaluated and it was found to exhibit low cytotoxicity and membrane permeability. In addition, 1 could also be made into test strips to detect Fe3+ and CN- and was employed as a sensor for detection Fe3+ in living cells.
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