Abstract
7-tert-Butylpyrene-1-azine-salicylaldehyde, L1 has been synthesized as a dual fluorescent chemosensor based on an excited state intramolecular proton transfer (ESIPT) mechanism. Ligand L1 undergoes AcO−/F− triggered sharp fluorescence enhancement towards Zn2+ in a co-operative fashion to form a complex with 2:1 stoichiometry. In order to investigate the influence of the 7-tert-butyl group, pyrene-1-azine-salicylaldehyde, L2 was also prepared. With ligand L1, fluorescence enhancement in acetonitrile solution is found to be twice as large than with ligand L2. The association constants of L1(O−)2⊃Zn2+ in the presence of AcO− and F− were determined to be Ka2 = 9.2 × 108 M−1 and 1.5 × 106 M−1, respectively using a 2:1 binding model. The results of a DFT interaction study were consistent with the experimental results.
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.
