Preparation and Properties of a Novel Cyclochalcone Fluorescent Dye
A new cyclic chalcone dye(A)was prepared from 1-indanone and 4-methoxybenzaldehyde by condensation reaction.In-done structure is the electron acceptor of the dye,and 4-methoxybenzaldehyde is the electron donor,which expands the conjugated system and makes dye A have intramolecular charge transfer ability.The structure of dye A was determined by NMR and high resolution mass spectrometry,and the UV-visible absorption spectrum and fluorescence emission spectrum of dye A in common solvents were test-ed.The results showed that dye A was polar sensitive,and the fluorescence lifetime of its solid powder was much longer than that in solution.The orbital energy gap of dye A is 3.16 eV(in theory).
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