Physical, Thermal and Biological Properties of Yellow Dyes with Two Azodiphenylether Groups of Anthracene.

ABSTRACT: Two yellow bis-azo dyes containing anthracene and two azodiphenylether groups (BPA and BTA) were prepared, and an extensive investigation of their physical, thermal and biological properties was carried out. The chemical structure was confirmed by the FTIR spectra, while from the UV-Vis spectra, the quantum efficiency of the laser fluorescence at the 476.5 nm was determined to be 0.33 (BPA) and 0.50 (BTA). The possible transitions between the energy levels of the electrons of the chemical elements were established, identifying the energies and the electronic configurations of the levels of transition. Both crystals are anisotropic, the optical phenomenon of double refraction of polarized light (birefringence) taking place. Images of maximum illumination and extinction were recorded when th

SUBMITTER: Carabet CA 

PROVIDER: S-EPMC7731036 | biostudies-literature | 2020 Dec

REPOSITORIES: biostudies-literature