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- W2005014740 abstract "Azo linked dye derivatives were synthesized and characterized by NMR, mass and elemental analysis. An excited state intramolecular proton transfer (ESIPT) in hydroxy Schiff base has been analyzed, and found that two distinct ground state isomers of I and II are responsible for the observed dual emission. DFT calculation on energy, dipole moment, charge distribution of the rotamers in the ground and excited states support the ESIPT process. PES calculation indicates that the energy barrier for the interconversion of two rotamers is too high in the excited state than the ground state. By varying the addition of base concentration to hydroxy Schiff base, two isobestic points were found which confirm the equilibrium among the trans enol form, anion and the cis enol form. Fluorescence quenching with metal ions reveal that hydroxy Schiff base can be used as a new fluorescence sensor to detect the Cu2+ ion." @default.
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- W2005014740 date "2011-12-01" @default.
- W2005014740 modified "2023-10-11" @default.
- W2005014740 title "A physiochemical study of azo dyes: DFT based ESIPT process" @default.
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- W2005014740 doi "https://doi.org/10.1016/j.saa.2011.08.017" @default.
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