title: On the photo-physical behavior and electro-optical effect of oxazine dyes in anisotropic host.
abstract: The optical characterization and polarized spectroscopy of oxazine 720, oxazine 750, and Nile blue were obtained in a nematic matrix. The interaction of these ionic dyes with the anisotropic surrounding and with that of the isotropic organic solvents was investigated and compared. The influence of the host nature on the molecular interaction of the guest molecules was also investigated. Dichroic ratios R and degree of anisotropy S of these ionic dyes in the liquid crystalline host were investigated by measuring the intensity of the absorption bands in the visible region of parallel aligned samples. The electro-optical effects of the guest-host systems were also investigated in an electro-optical system using polarized spectroscopic method based on homogeneous-homeotropic alignment.
authors.affiliation: Center of Applied Physics and Astronomy, Tabriz University, Tabriz, Iran. aggilani@guilan.ac.ir
authors.forename: A
authors.initials: A
authors.lastname: Ghanadzadeh
authors.forename: H
authors.initials: H
authors.lastname: Tajalli
authors.forename: P
authors.initials: P
authors.lastname: Zirack
authors.forename: J
authors.initials: J
authors.lastname: Shirdel
mesh_terms: D016880:Anisotropy; D004396:Coloring Agents / Q000737:chemistry*; D004563:Electrochemistry; D007834:Lasers; D015394:Molecular Structure; D055095:Optics and Photonics; D010078:Oxazines / Q000737:chemistry*; D010777:Photochemistry; D012997:Solvents; D013053:Spectrophotometry
chemical_list: D004396:Coloring Agents; D010078:Oxazines; D012997:Solvents; C008619:Nile Blue; C048170:oxazine 750