Ground state and excited state dipole moments of 6,8-diphenylimidazo[1,2-α]pyrazine determined from solvatochromic shifts of absorption and fluorescence spectra

详细信息    查看全文

• 作者：İ ; sa S&#x131 ; d&#x131 ; r ; ^a ; ^{isidir@bitliseren.edu.tr" rel="nofollow} ; Yadigar Gü ; lseven S&#x131 ; d&#x131 ; r^a ; ^{ygsidir@bitliseren.edu.tr" rel="nofollow}
• 关键词：Solvatochromic shift ; Ground state and excited state dipole moments ; Dual fluorescence ; Imidazo[1 ; 2-α ; ]pyrazine ; Kamlet– ; Taft parameters
• 刊名：Spectrochimica Acta Part A: Molecular and Biomolecular Spectroscopy
• 出版年：2011
• 出版时间：September 2011
• 年：2011
• 卷：79
• 期：5
• 页码：1220-1225
• 全文大小：438 K
• ISSN：S1386142511002939

文摘

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 (μ_g) and the excited state (μ_g) dipole moments of 68DIP were estimated from solvatochromic shifts of absorption and fluorescence spectra as a function of the dielectric constant () and refractive index (n). The results show that the value of excited state dipole moment in SE: D and twisted intramolecular charge transfer (TICT) excited equilibrated state dipole moment value of D was found. The solvent dependent spectral shifts in absorption and fluorescence spectra were analyzed by the polarizability–polarity and Kamlet–Taft parameters.