ZHANG Yue-hua, ZHANG Qi-ping, SHI Wen-yan, LEI Wu, XIA Ming-zhu, WANG Feng-yun. Synthesis and Quantum Chemistry Study on Fluorescence Spectra of Three 1,8-naphthalimide Monomers[J]. Chinese Journal of Luminescence, 2011,32(5): 505-513
ZHANG Yue-hua, ZHANG Qi-ping, SHI Wen-yan, LEI Wu, XIA Ming-zhu, WANG Feng-yun. Synthesis and Quantum Chemistry Study on Fluorescence Spectra of Three 1,8-naphthalimide Monomers[J]. Chinese Journal of Luminescence, 2011,32(5): 505-513 DOI: 10.3788/fgxb20113205.0505.
Synthesis and Quantum Chemistry Study on Fluorescence Spectra of Three 1,8-naphthalimide Monomers
8-naphthaline fluorescent monomers were synthesized by using 4-bromo-1
8-naphthalic anhydride and N-methyl-piperazine. The structures were characterized by IR
MS
1
H NMR and element analysis. The fluorescent excitation and emission spectra were investigated. The structures of the three flourescent monomers were optimized in the ground and the first excited state by PM3 method. The analysis of structure indicates that the rings in the three fluorescent monomers are in the same plane
and the conjugate system is formed. For all the optimal configurations
there is no imaginary frequency after vibrational analysis
which indicates that the structures are true local minima. On the basis of optimized structures for both the ground state and the first excited state
the time dependent density function theory(TD-DFT)at the B3LYP/6-31G
*
level was used to predict the absorption and emission wavelength.The results indicate that the wavelength of the excitation and emission spectra are well consistent with the experimental data.
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