Enhanced adsorptive removal of anionic and cationic dyes from single or mixed dye solutions using MOF PCN-222

Abstract

MOF PCN-222 exhibits excellent adsorption/removal capacities for numerous anionic and cationic dyes individually and together in solutions.

PCN-222 metal–organic framework: a selective and highly efficient sorbent for the extraction of aspartame from gum, juice, and diet soft drink before its spectrophotometric determination

“…5. As can be seen in the image of metal-organic framework synthesized, that it has typical rod-like structure which was similar to the reported studies [30].…”

Triplet–Triplet Annihilation Upconversion in a MOF with Acceptor‐Filled Channels

“…The latter can be ascribed to CF 3 groups interacting with the MOF.T he resonances of the CF moietiesa re not observed, which is ascribed to the dispersion of the resonances by different chemicale nvironments. These results confirm the successful insertion of DPA-F 14 in the MOF channels [35,36] and suggest that DPA-F 14 is disordered and interacts with the MOF.…”

“…Small and large molecules can penetrate into the large hexagonal channels of PCN-222(M) (Ø 3.7 nm), allowing pH sensing, [29] catalytic reactions, [28b, [30][31][32][33][34] adsorptive removal of molecular speciesl ike dyes from solution, [35] as well as loading and releaseo fd rugs [36,37] To probe the insertion of the annihilator into the channels of PCN-222(Pd), we used NMR spectroscopy and a 19 F-labelled 1,2,3,4,5,6,7,8-octafluoro-9,10-bis(4-trifluoromethyl-phenyl) anthracene (DPA-F 14 ). The 19 FNMR resonances of DPA-F 14 shift from d = À63 (CF 3 ), À134 (CF) and À155 (CF) ppm in solution [38] to d = À64, À130/-134 and À153 ppm in the crystalline state (SupportingI nformation, Figures S3 and S4).…”

“…[35,36] Without coating the channel walls, loading of methyleneb lue andd oxorubicin in to PCN-222 gave 0.906 and 1.09 mg/ mg MOF,r espectively. [35,36] Subsequent leaking of DPAf rom CA/DPA@PCN-222(Pd) was studied in toluenea nd in water at 70 8C. In toluene, 0.37 mg DPA/mg CA/DPA@PCN-222(Pd) were released after 5h,w hile no release was observed in water after 2h(Supporting Information), confirming the desired retention of the DPAg uests in the hydrophobic hostinw ater.…”

A Fully Noble Metal-Free Photosystem Based on Cobalt-Polyoxometalates Immobilized in a Porphyrinic Metal–Organic Framework for Water Oxidation

“…In the proposed formula, the negative charge of the POMs is likely compensated by the protonation of the hybrid framework as confirmed by the absence of alkaline cations shown by EDS analysis (Table S2). Consistently, the isoelectric point of MOF-545 is at pH 8, 21 indicating that the MOF is indeed cationic under the pH synthetic conditions. Relying on IR spectroscopy 22 and DFT 23 studies on the related NU-1000 material, we thus propose the following proton localization on the charged Brunauer-Emmett-Teller (BET) surface area measurements ( Figure 3a) calculated from the N 2 adsorption/desorption isotherms show the expected correlation between decreased surface areas and POM encapsulation, from 2080 m 2 g -1 for the bare MOF to 1180 m 2 g -1 for P 2 W 18 Co 4 @MOF-545.…”