Abstract
A three-dimensional protonated proflavin (PF) encapsulated metal-organic framework, formulated as [Zn(NIPH)2(HPF)2] (1), has been successfully synthesized under hydrothermal conditions using the familiar and cheap ligand 5-nitroisophthalic acid (5-H2NIPH). The as-synthesized compound 1 exhibits an intense green emission in solution, whereas strong red fluorescence is observed in the crystal form. The strong green emission of 1 could be highly and selectively quenched by Fe3+ ions, even in the presence of other competing metal ions such as Ag+, Al3+, Ca2+, Cd2+, Co2+, K+, Mg2+, Mn2+, Na+ and Zn2+. In addition, 1 exhibits superior selectivity and sensitivity towards Cr2O72− ions over other anions including Br−, CH3COO−, Cl−, F−, H2PO4−, HCO3−, HPO42−, NO3−, PO43− and SO42−. The possible luminescence quenching mechanisms were investigated. This work revealed that a dye-encapsulated MOF can be used as one of the most fascinating multi-response luminescence materials for selective chemical sensing.
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.
