Abstract
Synthesis of metal–organic framework (MOF) materials via ultrasound (US) irradiation involves shorter reaction times and offers enhanced control of particle size and morphology compared to conventional electric heating. Here, we report the exploration of highly luminescent three-dimensional microporous metal–organic framework, [Zn2(oba)2(bpy)], (1; H2oba = 4,4′-oxybis(benzoicacid); bpy = 4,4′-bipyridine) synthesized by sonochemistry for highly selective and sensitive detection of Fe3+ in MeOH solution via a fluorescence quenching mechanism. Fluorescence titration experiments reveal that 1 is highly selective for Fe3+ ion with a response time of <2 min and the limit of detection (LOD) reaches a low level of 0.3 μM (17 ppb). The luminescence is completely quenched in 100 µM MeOH solution of Fe3+. Furthermore, the static quenching constant is calculated to be upper than 58 000 M−1 by the fluorescence titration experiment in low concentration of Fe3+. No interferences from 250 μM As3+, Cd2+, Zn2+, Co2+, Ni2+, Cu2+, Pb2+, Mn2+ and Al3+ were found for the detection of Fe3+. Importantly, 1 can be cycled at least four times without loss of emission signals, which suggests that the functionalized 1 is a promising luminescent probe for selectively sensing of Fe3+ ions.
Published Version
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.
