Muddapur G V, Patil N R, Patil S S, Melavanki R M, Kusanur R A
Department of Physics, B V B College of Engineering and Technology, Hubli, 580031, Karnataka, India.
J Fluoresc. 2014 Nov;24(6):1651-9. doi: 10.1007/s10895-014-1452-6. Epub 2014 Sep 18.
In the present work, the absorption and fluorescence spectra of newly synthesized aryl boronic acid derivative namely 2-Methylphenyl boronic acid (2MPBA) have been recorded in various solvents of different polarities. The ground state dipole moment of 2MPBA was obtained from quantum chemical calculations. Solvatochromic correlations were used to estimate the ground state (μ g ) and excited state (μ e ) dipole moments. The excited state dipole moments are observed to be greater than the ground state dipole moment and ground and excited state dipole moments are not parallel but subtend by an angle of 88(0). Further, the changes in dipole moment (Δμ) were calculated both from solvatochromic shift method and microscopic solvent polarity parameter (E T (N) ), and the value are compared. The spectral variations were analyzed by Kamlet-Taft parameters.
在本研究中，新合成的芳基硼酸衍生物即2-甲基苯基硼酸（2MPBA）在不同极性的各种溶剂中的吸收光谱和荧光光谱已被记录。2MPBA的基态偶极矩通过量子化学计算获得。利用溶剂化显色相关性来估计基态（μg）和激发态（μe）偶极矩。观察到激发态偶极矩大于基态偶极矩，且基态和激发态偶极矩不平行，而是呈88(0)的夹角。此外，通过溶剂化显色位移法和微观溶剂极性参数（ET(N)）计算了偶极矩的变化（Δμ），并对其值进行了比较。通过Kamlet-Taft参数分析了光谱变化。
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