Bitlis Eren University, Faculty of Sciences and Arts, Department of Physics, 13000 Bitlis, Turkey.
Spectrochim Acta A Mol Biomol Spectrosc. 2011 Sep;79(5):1220-5. doi: 10.1016/j.saa.2011.04.046. Epub 2011 Apr 22.
Electronic absorption and dual fluorescence spectra of 6,8-diphenylimidazo[1,2-α]pyrazine (68DIP) was recorded in various solvents with different polarity at room temperature. The ground state (μg) and the excited state (μg) dipole moments of 68DIP were estimated from solvatochromic shifts of absorption and fluorescence spectra as a function of the dielectric constant (ɛ) and refractive index (n). The results show that the value of excited state dipole moment in SE: μeSE=2.8772 D and twisted intramolecular charge transfer (TICT) excited equilibrated state dipole moment value of μeLE=2.9744 D was found. The solvent dependent spectral shifts in absorption and fluorescence spectra were analyzed by the polarizability-polarity and Kamlet-Taft parameters.
室温下，在不同极性的各种溶剂中记录了 6,8-二苯基咪唑并[1,2-α]吡嗪（68DIP）的电子吸收和双荧光光谱。根据吸收和荧光光谱随介电常数（ɛ）和折射率（n）的溶剂变色，估算了 68DIP 的基态（μg）和激发态（μg）偶极矩。结果表明，在 SE 中激发态偶极矩的值为 μeSE=2.8772 D，而扭曲的分子内电荷转移（TICT）激发平衡态偶极矩值为 μeLE=2.9744 D。通过极化率-极性和 Kamlet-Taft 参数分析了吸收和荧光光谱中溶剂依赖性的光谱位移。
