Owing
to the rapid increase of Hg(II) ions in water resources, the design
and development of new adsorbents for Hg(II) removal are becoming
a significant challenge in environmental protection. Herein, a thiol-functionalized
metal–organic framework (SH-MiL-68(In)) was successfully prepared
through a post-synthesis modification procedure, and the framework
intactness and porosity were well maintained after this process. SH-MiL-68(In)
exhibited selective adsorption performance for Hg(II) ions in water.
Meanwhile, SH-MiL-68(In) also shows a high adsorption capacity (450
mg g–1), large adsorption rate (rate constant k
2 = 1.25 g mg–1 min–1), and good recycling of adsorption capacity toward Hg(II) ions.
The excellent adsorption performance resulted from the strong binding
interactions between -SH soft basic groups and Hg(II) soft acidic
ions.
A new luminescent metal-organic framework, {[Cd3(HL)2(H2O)3]·3H2O·2CH3CN}n (1) (H4L = 1-(3,5-dicarboxylatobenzyl)-3,5-pyrazole dicarboxylic acid), has been synthesized by solvothermal reaction and characterized by infrared spectroscopy, powder X-ray diffraction, thermogravimetry measurements and so on. 1 shows a new trinodal (4,4,6)-connected topology. Importantly, 1 displays intense luminescence in the solid state and high luminescent sensitivity and selectivity for Fe3+, CrO42- and Cr2O72- ions in aqueous solution, making it a potential probe for detecting these substances. The quenching mechanisms are also further discussed in detail. In addition, further research on the adsorption of dyes shows that 1 can selectively adsorb Congo red dye from other dye molecules.
scite is a Brooklyn-based organization that helps researchers better discover and understand research articles through Smart Citations–citations that display the context of the citation and describe whether the article provides supporting or contrasting evidence. scite is used by students and researchers from around the world and is funded in part by the National Science Foundation and the National Institute on Drug Abuse of the National Institutes of Health.