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- W2952340845 abstract "Nitrogen heterocycles of azulene have currently been under study to examine the effects of nitrogen substitution in the azulene system. We have determined the dipole moments of three different electronic states of 1,3‐diazaazulene: the ground state, the first excited singlet state (1ππ*, B1), and the phosphorescent state (3ππ*). Measurements have been performed on the origin band and several prominent vibronic bands of the 1B1 ← 1A1 transition. The dipole moment of the ground state was determined from dielectric constant measurements, and the change in dipole moments upon excitation to higher electronic states was measured from the pseudo‐Stark effect of molecular crystals on diazaazulene in a naphthalene host. The measured values are μ(GS) = 2.98 ± 0.01 D, |Δμ(GS−S1)| = 1.80 ± 0.05 D, and |Δμ(GS—T1)| = 1.10 ± 0.07 D. The measurements enable us to examine the role of nitrogen atoms participating the charge distribution of the σ core and the π‐electron cloud in the 1B1 ← 1A1 transition in comparison with t..." @default.
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- W2952340845 date "1974-02-19" @default.
- W2952340845 modified "2023-09-23" @default.
- W2952340845 title "ChemInform Abstract: ELECTRIC FIELD SPECTRA AND DIPOLE MOMENTS OF 1,3-DIAZAAZULENE" @default.
- W2952340845 cites W1979981651 @default.
- W2952340845 doi "https://doi.org/10.1002/chin.197407061" @default.
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