Abstract
The absorption and fluorescence spectra of salicylaldehyde 2-pyridyl-hydrazone (SAPH) and indolaldehyde 2-salicylhydrazone (IASH) were studied in various solvents. The relative fluorescence intensity and efficiency ratio are reported. Highly polar solvents cause red shifts in SAPH and blue shifts in IASH which indicate that the long-wavelength bands of the neutral molecule arise from π → π* and n → π* transitions respectively. The ground state dissociation constants p K a of SAPH and IASH were measured spectrophotometrically and spectrofluorometrically in 40 vol.% ethanol—water solutions. The corresponding p K a reveal that the compounds have an increased acidity in the excited state.
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.
