Cu(I)-organic framework as a platform for high-efficiency selective adsorption of methylene blue and reversible iodine uptake

A Cu(I)-MOF, namely {[Cu(4-PTZ)]·(H2O)0.5}n (1), that contains rhombic channels with the size of 10.174 ​Å ​× ​16.965 ​Å has been obtained based on in situ generated 5-(4-pyridyl)-1H-tetrazole ligand. Compound 1 not only displays remarkable capability for selective adsorption toward the organic dye Methylene Blue (149.5 ​mg ​g−1), but also shows reversible adsorption of I2 molecules in hexane medium (96.2%). Therefore, compound 1 should be a promising MOF-based bifunctional adsorbent in the field of pollutant removal.