Shahla Golghasemi - Academia.edu (original) (raw)
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Papers by Shahla Golghasemi
Spectrochimica Acta Part A: Molecular and Biomolecular Spectroscopy, 2013
A quantitative study of solvent environment effects on the photo-physical properties of a group o... more A quantitative study of solvent environment effects on the photo-physical properties of a group of polymeric cyano azo benzene compounds was carried out at room temperature. Absorption and emission spectra of this group of azo matter with similar structure and different statistical weight of azo block have been studied in different solvents. The solvatochromic method was used to estimate the dipole moments in ground and excited states. The nature and degree of solvent-solute interactions were characterized using Kamlet-Abboud-Taft multi-parameter polarity scale.
Journal of Molecular Liquids, 2013
Tautomerism 23 Absorption and emission spectra of salicylaldehyde azo and related two Schiff base... more Tautomerism 23 Absorption and emission spectra of salicylaldehyde azo and related two Schiff bases with the same molecular 24 skeletons and different functional groups have been studied in various solvents with different polarities. The 25 solute's photo-physical behavior depends strongly on the solvent-solute interactions and solvent microenviron-26 ment as well as resonance structures of the salicylaldehyde azo and related Schiff bases. In order to understand 27 the effects of intermolecular interactions on spectral behavior of these substances and to conceive nature and 28 extent of solvent-solute interactions the spectral variations were analyzed by the linear solvation energy 29 relationship concept. In addition, the variations of dye dipole moments, from ground to excited states, were 30 investigated in solvent media by means of solvatochromic method.
Journal of Molecular Structure
Absorption and fluorescence spectra of three polymeric azo sulfonamide substances were recorded i... more Absorption and fluorescence spectra of three polymeric azo sulfonamide substances were recorded in various solvents in the range of 300-800 nm at room temperature. The solvatochromic behavior of these substances and solvent-solute interactions both specific and non-specific-can be analyzed by means of linear solvation energy relationship concept suggested by Kamlet-Taft. The ground and excited state dipole moments of these substances were also evaluated by solvatochromic shift method. It was observed that the excited state dipole moments (μe) are higher than ground state dipole moments (μg) for all samples. Furthermore polymeric structural configurations show an important role in spectroscopic behaviors of polymeric azo sulfonamide samples.
Spectrochimica Acta Part A: Molecular and Biomolecular Spectroscopy, 2013
A quantitative study of solvent environment effects on the photo-physical properties of a group o... more A quantitative study of solvent environment effects on the photo-physical properties of a group of polymeric cyano azo benzene compounds was carried out at room temperature. Absorption and emission spectra of this group of azo matter with similar structure and different statistical weight of azo block have been studied in different solvents. The solvatochromic method was used to estimate the dipole moments in ground and excited states. The nature and degree of solvent-solute interactions were characterized using Kamlet-Abboud-Taft multi-parameter polarity scale.
Journal of Molecular Liquids, 2013
Tautomerism 23 Absorption and emission spectra of salicylaldehyde azo and related two Schiff base... more Tautomerism 23 Absorption and emission spectra of salicylaldehyde azo and related two Schiff bases with the same molecular 24 skeletons and different functional groups have been studied in various solvents with different polarities. The 25 solute's photo-physical behavior depends strongly on the solvent-solute interactions and solvent microenviron-26 ment as well as resonance structures of the salicylaldehyde azo and related Schiff bases. In order to understand 27 the effects of intermolecular interactions on spectral behavior of these substances and to conceive nature and 28 extent of solvent-solute interactions the spectral variations were analyzed by the linear solvation energy 29 relationship concept. In addition, the variations of dye dipole moments, from ground to excited states, were 30 investigated in solvent media by means of solvatochromic method.
Journal of Molecular Structure
Absorption and fluorescence spectra of three polymeric azo sulfonamide substances were recorded i... more Absorption and fluorescence spectra of three polymeric azo sulfonamide substances were recorded in various solvents in the range of 300-800 nm at room temperature. The solvatochromic behavior of these substances and solvent-solute interactions both specific and non-specific-can be analyzed by means of linear solvation energy relationship concept suggested by Kamlet-Taft. The ground and excited state dipole moments of these substances were also evaluated by solvatochromic shift method. It was observed that the excited state dipole moments (μe) are higher than ground state dipole moments (μg) for all samples. Furthermore polymeric structural configurations show an important role in spectroscopic behaviors of polymeric azo sulfonamide samples.