Journal
CHEMICAL COMMUNICATIONS
Volume 55, Issue 99, Pages 14980-14983Publisher
ROYAL SOC CHEMISTRY
DOI: 10.1039/c9cc08174g
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Funding
- National Natural Science Foundation of China [21672130, 21601065]
- Natural Science Foundation of Shandong Province [ZR2017MEM006]
- Fundamental Research Funds of Shandong University [2017JC011]
- State Key Laboratory of Crystal Materials
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A ratiometric fluorescent probe for hydrazine based on a coumarin chalcone framework and a levulinic acid terminal group with a low detection limit (0.1 ppb, 0.003 mu M), a large ratiometric fluorescence change (I-465/I-575, 1265-fold enhancement) and a wide pH work range (3.0-12.0) was developed. The mechanism analysis of the isolated hydrazine product characterized by NMR, HRMS and the crystal structure indicates that the levulinic acid group is firstly removed by deprotection and then the dihydropyrazole ring is formed due to the addition and subsequent cyclization reaction in the presence of hydrazine.
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