Abstract
Abstract Tetraphenylethylene-based covalent organic framework (COF-DHTA) was prepared and then well characterized. COF-DHTA processes regular pore structure and high thermal stability. COF-DHTA suspension in DMF displays moderate fluorescence emission in DMF suspension and a highly selective fluorescence “turn-on” response towards Al3+ ions. The fluorescence intensity of COF-DHTA suspension at the emission peak 352 nm exhibits a good linear relationship with the concentration of the added Al3+ ions with a very low detection limit of 0.927 μmol/L. The selective and sensitive fluorescence enhancement recognition and detection for Al3+ ions can be attributed to the coordination of Al3+ ions with N and O atoms on the COF-DHTA and the suppression of photoinduced electron transfer (PET). The results of the N2 adsorption experiment, X-ray photoelectron spectroscopy (XPS), and density functional theory (DFT) calculation verified the coordination interaction between Al3+ ion and the N and O chelating sites on COF-DHTA. This work may pave the way to reasonable design fluorescent COF chemosensors for the recognition and detection of specific metal ions.
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.
