1. A New Fluorescent Probe of Hydrazine: 2-[4-(Imidazo[1,2-a]pyridin-3-ylethynyl)benzylidene]malononitrile
- Author
-
Yi Le, Chao Huang, Liu Li, Zhao Chunshen, Chai Huifang, and Shuo Yang
- Subjects
chemistry.chemical_classification ,Imidazopyridine ,Chemistry ,010401 analytical chemistry ,Hydrazine ,General Chemistry ,Electron acceptor ,010402 general chemistry ,Photochemistry ,01 natural sciences ,Fluorescence ,0104 chemical sciences ,chemistry.chemical_compound ,Intramolecular force ,Pyridine ,Molecular orbital ,Malononitrile - Abstract
Hydrazine is widely used in a plenty of fields as a raw material and is closely related to our healthy. A new fluorescent probe of hydrazine was designed and synthesized, choosing imidazo[1,2-a]pyridine as the electron acceptor, based on the intramolecular charge-transfer (ICT) effect. The probe, 2-[4-(imidazo[1,2-a]pyridin-3-ylethynyl)benzylidene]malononitrile (5), responds rapidly to hydrazine and exhibits obvious color changes from yellow to colorless, indicating its use as a color indicator for hydrazine. Sensing mechanism of probe 5 toward hydrazine was deduced through HOMO–LUMO energy levels and the interfacial plots of the molecular orbitals. Its physical and chemical properties were demonstrated by UV, fluorescence, and single-crystal X-ray diffraction via computation and experiment. The calculated data are consistent with experimental results.
- Published
- 2017