A Zn-based, mixed-ligand (pillared paddlewheel), metal-organic framework (MOF) has been covalently and quantitatively decorated with free carboxylic acids to demonstrate the utility of covalent post-synthesis modification in the construction of otherwise inaccessible carboxy-functionalized MOFs.

Abstract Nickel salts of Keggin heteropolytungstates with the general formula Ni x A y W 12− O 39or40 (A = Si/P) were synthesized and studied as bulk catalytic materials or supported ones by deposition on modified functionalized clay minerals (pillared layered porous heterostructure). Characterizations Raman, 31 P 29 Si-NMR, ESEM-EDS techniques showed that pure systems preserved Ni/W ratio expe...

The effect of initial Congo Red and Procion concentration on isotherm adsorption thermodynamic study using natural Zn/Fe Pillared bentonite have been conducted. adsorbents were also characterized by Fourier transform infrared (FTIR), X-Ray Diffraction (XRD), Scanning electron microscope-energy dispersive analysis (SEM-EDX). showed that the optimum dye removal was obtained at 80 mg/L. followed F...

In this work, Ti-pillared bentonites were evaluated to remove ciprofloxacin (CIP) from the aqueous solution. Pillared sodium bentonite (BSP) and pillared calcium (BCP) prepared by means of sol–gel method using titanium tetraisopropoxide with calcination for 3 h at 500 °C. They characterized BET N2 adsorption, subjected X-ray diffraction Fourier transform infrared spectroscopy. The results show ...

Ten coordination compounds based on a sulfonated monoazo dye, formulated as M(H(2)O)(2)(4,4'-abs)(2) (M = Mn , Co , Cu , Zn , Cd and Pb ; 4,4'-abs = 4-aminoazobenzene-4'-sulfonic anion), Ag(4,4'-abs) (), [Ln(H(2)O)(phen)(2)(4,4'-abs)(3)].3H(2)O (Ln = Gd , Tb , and Ho ; phen = 1,10-phenanthroline), as well as the parent ligand L [(4,4'-Habs)(2).4H(2)O] and precursor NaL.HL [Na(4,4'-abs)(4,4'-Hab...

We report on a new approach for the synthesis of TiO2-pillared montmorillonite, where the pillars exhibit a high degree of crystallinity (nanocrystals) representing a mixture of anatase and rutile phases. The structures exhibit improved adsorption and photocatalytic activity as a result of hydrothermally activated intercalation of titanium polyhydroxo complexes (i.e., TiCl4 hydrolysis products)...