Abstract
This study demonstrates the visible spectral data for two oxazine dyes, brilliant cresyl blue (BCB) and Nile blue (NB) in aqueous additive solutions as a function of the dye and additive concentrations at room temperature. The added organic additives were thiourea (TU) and two basic mono and di-amino compounds, i.e. diethanolamine (DEA) and aminoethyl ethanolamine (AEEA). The monomer and dimer spectra as well as dimerization constants (Kd) of the studied dyes in water with or without TU were determined and analyzed using DECOM Program. Due to the multiple properties of the additives (having various functional groups), different absorption characteristics were observed for these dyes in water with or without additives. A reduction of the dimerization parameters for the dyes in aqueous additive solutions was observed. The exciton theory was used to analyze the dimer structure. The nature of deprotonation of the dyes in the basic media (adjusted by addition of additive) was interpreted in terms of direct and indirect mechanisms of proton transfer process.
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
