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The Effect of Substituent Position on Excited State Intramolecular Proton Transfer in Benzoxazinone Derivatives: Experiment and DFT Calculation

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Abstract

The preparation and the photophysical behaviour of two benzoxazinone derivatives isomers 2-(1-hydroxynaphthalen-2-yl)-4H-benzo[e][1, 3]oxazin-4-one(1) and 2-(3-hydroxynaphthalen-2-yl)-4H-benzo[e][1, 3]oxazin-4-one(2) designed for displaying were reported. The effect of substituent position and solvent effect on the excited state intramolecular proton transfer (ESIPT) dynamics and the spectroscopic properties were investigated using a combined theoretical (i.e., time-dependent density function theory (DFT)) and experimental (i.e., steady-state absorption and emission spectra and time-resolved fluorescence spectra) study. The results showed that compound 1 would facilitate ESIPT process and favored the keto tautomer emission, while compound 2 suppressed the ESIPT process and favored the enol emission.

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Acknowledgments

The authors gratefully thank the support from International S&T Cooperation Program of China (2012DFA51210), National Natural Science Foundation of China (51203138, 51273179, 51573165), Natural Science Foundation of Zhejiang Province, China (LY15E030006) and Natural Science Foundation of Zhejiang University of Technology (1401101002408).

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Correspondence to Cheng Zhang.

Supplementary material

See supplementary material for the calculated structures cartesian coordinates of 1 and 2 and corresponding fitting parameters of the time-resolved fluorescence for 1 and 2. (DOCX 73 kb)

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Bian, GF., Guo, Y., Lv, XJ. et al. The Effect of Substituent Position on Excited State Intramolecular Proton Transfer in Benzoxazinone Derivatives: Experiment and DFT Calculation. J Fluoresc 27, 235–242 (2017). https://doi.org/10.1007/s10895-016-1950-9

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  • DOI: https://doi.org/10.1007/s10895-016-1950-9

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