Rapid recognition of fatal cyanide in water in a wide pH range by a trifluoroacetamido based metal–organic framework

Abstract

A new metal-organic-framework (MOF) called UiO-66-NH-COCF3 was prepared using trifluoroacetamido functionalized terephthalic acid ligand. Powder X-ray diffraction (PXRD), infrared (IR) spectroscopy, thermogravimetric analysis (TGA) and Brunauer Emmett-Teller (BET) experiment were...

A self-cleaning hydrophobic MOF-based composite for highly efficient and recyclable separation of oil from water and emulsions

“…Hereafter, this post-modified MOF will be called 1 0 @CF 3 . 1 19 F NMR (400 MHz, DMSO-d 6 ): À75.18 ppm. ESI-MS (m/z): 277.0665 for (M-H) À ion (M = mass of H 2 BDC-OCOCF 3 linker) and m/z = 181.0165 corresponds to the mass of H 2 BDC-OH linker (Fig.…”

“…[16][17][18] The wide range of functionality in the family of MOFs makes them unique in the field of sensing and catalysis. [19][20][21][22][23] The other absorbent materials like core-shell magnetic materials developed by Yu et al have very low surface areas, whereas the MOF materials have very large surface areas, which is advantageous for absorption-related applications. 24,25 Therefore, we synthesized a Zr(IV) based MOF material (1 0 @CF 3 ) with a -OCOCF 3 group by the post-synthetic modification of Zr-BDC-OH MOF (1 0 ) with trifluoroacetic anhydride.…”

Sulfonic acid functionalized zirconium-based metal–organic framework for the selective detection of copper(ii) ions

“…Metal-organic frameworks (MOFs) are a class of porous materials with high surface area and large pore volume. 1 The MOF materials are applicable in the field of catalysis, [2][3][4][5] water harvesting, 6 drug delivery 7 and sensing 8,9 due to their porous nature and tunable functionality. A wide functional variety of MOFs could be prepared by the combination of different metals and functionalized ligands.…”

“…The presence of functional groups in MOFs is highly advantageous for the selective sensing of different analytes. The selective sensing of heavy metal ions, 9,10 reactive oxygen species (ROS), 11 volatile organic compounds (VOCs), 12 and toxic anions 8 by chromatography, 13 electrochemistry, 14 voltammetry, 15 and spectrophotometric 16 methods is time-consuming and complicated whereas, fluorescence sensing is rapid, selective, sensitive and simple to carry out. Because of the above advantages of the fluorescence-based technique over the other techniques, scientists working in the field of sensing prefer this method.…”

Design of “turn-off” luminescent Ln-MOFs for sensitive detection of cyanide anions

“…31,34 Recently, several MOF material systems have been developed as selective sensors for CN − ; however, post-synthetic modification or guest encapsulation of a reactive fluorescent probe is often required to achieve cyanide sensing. 32,[35][36][37][38] For synthesizing the target MOF probes, a straightforward, one-step process would be preferable over multi-step strategies. 39 The specific chemical reaction or hydrogen bonds between CN − and the recognition moiety in MOFs was involved in the sensing processes.…”