Determination of Excited Singlet-State Dipole Moments of Methoxy and Dimethylamino Substituted Benzylidenebenzosuberones Using Solvatochromic Method

作者：Tomeckova Vladimira^*; Velika Beata; Malhotra Sanjay; Revicka Miroslava; Perjesi Pal

来源：Spectroscopy Letters, 2015, 48(5): 317-323.

DOI：10.1080/00387010.2014.881378

• cyclic chalcone analogues
• ground state and excited state dipole moments
• solvatochromic shift method

The solvent effects on the electronic absorption and emission fluorescence spectra for a series of chalcone cyclic analogues were studied. The singlet-state excited dipole moments and the ground state dipole moments of the cyclic chalcone analogues E-2-benzylidene-1-benzosuberone E-2-(4'-methoxybenzylidene)-1-benzosuberone E-2-(40-dimethylaminobenzylidene)-1-benzosuberone were calculated by using solvatochromic shift method by means of equations using the variations of Stokes' shift with the solvent's dielectric constant and refractive index values. It was found that the excited state dipole moments calculated by the solvatochromic shift method were greater than the ground state dipole moments indicating a substantial redistribution of the pi-electron densities in a more polar excited state for each derivative.

• 出版日期2015