Study in the Solvent Polarity Effects on Solvatochromic Behaviour of Pomiferin

摘要

Solvent polarity is very important considering the coulombic and dispersive interactions between the charge distribution in the solubility and the polarizability of the solvent. Therefore, the solvatochromic properties of pomiferin molecule in solvents of different polarities has been investigated. So, the electronic absorption of pomiferin molecule at room temperature was analyzed by using some physical parameters such as refractive index, dielectric constant, Kamlet–Taft parameters src=image/10.5923.j.pc.20160602.01_001.gif> (hydrogen bond donating ability) and src=image/10.5923.j.pc.20160602.01_002.gif> (hydrogen bond accepting ability). The absorption spectra were decomposed by using multiple peak analysis. It was obtained that some solvents indicated a good linearity for hydrogen-bond acceptor basicity parameter,refractive index and dielectric constant with respect to wavenumber. This showed that the hydrogen-bond acceptor basicity parameter is the most important parameter for both dissociation and complex formation reactions, and the hydrogen bonding acceptor ability and the induction-dispersive forces of solvent molecules have caused the bathochromic shift in absorption maxima of pomiferin molecule.