A luminescent cadmium metal–organic framework for sensing of nitroaromatic explosives

Abstract

A novel metal–organic framework [Cd3(TPT)2(DMF)2]·(H2O)0.5 (1) has been solvothermally synthesized using a new rigid unsymmetrical tricarboxylate ligand p-terphenyl-3,4′′,5-tricarboxylic acid (H3TPT). Single-crystal X-ray diffraction analysis reveals that 1 possesses a three-dimensional (3D) framework with an alb-4,8-C2/c topology constructed by the combination of Cd–carboxylate chains and TPT linkers. The π-electron rich ligand H3TPT enables 1 to have an excellent luminescent property. The micrometer-sized compound 1′ dispersed in ethanol exhibits high efficiency detection for picric acid (PA). The high efficiency, stability and recyclability of 1′ make it a potential chemosensor for nitroaromatic explosives.

Fabrication of a new metal–organic framework for sensitive sensing of nitroaromatics and efficient dye adsorption

“…S22 †). The emission intensity of H 4 L remained almost unchanged with different concentrations of 2,4-DNP suggesting that there may be interactions operating between 2,4-DNP and the Cd(II) centers of 1 and the variation in emission intensity are not related to the between 2,4-DNP and the ligands H 4 L. [25][26][27] Also, the results of the powder X-ray diffraction (PXRD) patterns (Fig. S27d †) indicated possible structural and/or symmetry changes within the crystal structure of 1 during the guest uptake.…”

Structures and high fluorescence of novel nanocomposites of sodium carboxymethyl cellulose/Tb(III) prepared at different pHs

“…In recent years, a number of Ln-MOFs with carboxylate ligands have been reported, such as [Ln 2 (CIP) 2 (DMF) 4 [17][18][19].…”

Absorption competition quenching mechanism of porous covalent organic polymer as luminescent sensor for selective sensing Fe3+

“…Fluorescent probes have gained much attention in highly sensitive and selective detections of metal ions, small molecules and explosives in recent years. Previous studies have proved that conjugated polymer‐based fluorescent sensors can amplify this sensitive signal and detect analyte .…”