A dual-functional luminescent Tb(iii) metal–organic framework for the selective sensing of acetone and TNP in water

Abstract

A novel 2D luminescent terbium metal–organic framework demonstrating highly efficient and selective sensing for acetone and 2,4,6-trinitrophenol (TNP) in an aqueous solution was solvothermally synthesized and structurally characterized.

Synthesis, structure and magnetocaloric properties of a new two-dimensional gadolinium(III) coordination polymer based on azobenzene-2,2′,3,3′-tetracarboxylic acid

“…The absorption observed at 1468 cm À1 is caused by the N N stretching vibration of the ligand (Goel & Kumar, 2018). The structural features of the complex deduced from IR spectra match the results of the single-crystal X-ray analysis.…”

Metal‐Carboxyl Helical Chain Secondary Units Supported Ion‐Exchangeable Anionic Uranyl–Organic Framework

“…Detailed structural analysisr eveals that, although the uranyl node in 1 is monomeric without any oligomerization, the bridging carboxyls of the Habtc 3À linkersi n( h 1 -h 1 )-m 2 mode connectt hese uranyl centres to form am etal-carboxyl helical chain (Figure 1b and 2b-d), which serves as the secondary buildingu nits of the 3D framework of 1.I nt his helical chain, all the adjacent uranium units are linked by bridging carboxyl Oa toms (O7 and O8)w ith at wist angle 69.71(6)8 (FigureS3). To the best of our knowledge,q uite different to those UOFs with buildingunits of clusters, [16] cages, [17] or linked by weak interaction, [18] this kind of helical chain-type buildingu nit is reported for the first time here, even compared with those abtc 4À -based MOFs with lanthanide [19] or transition metal nodes. [20] For example, metal trimer building blocks with differ-ent connectivity( from 4-connected to 6-connected) are found for In-MOF, [20a] or [20b,c] while 4-connected are found in the dimer [Zn 2 (CO 2 ) 4 (NO 3 )] for NENU-505 [20d] All the rigid flat Habtc 3À linkersa lign along both sides of the helical chain through coordination to uranyl nodes (Figure 2b).…”

“…In this helical chain, all the adjacent uranium units are linked by bridging carboxyl O atoms (O7 and O8) with a twist angle 69.71(6)° (Figure S3). To the best of our knowledge, quite different to those UOFs with building units of clusters, cages, or linked by weak interaction, this kind of helical chain‐type building unit is reported for the first time here, even compared with those abtc 4− ‐based MOFs with lanthanide or transition metal nodes . For example, metal trimer building blocks with different connectivity (from 4‐connected to 6‐connected) are found for In‐MOF, or PCN‐250, while 4‐connected are found in the dimer [Zn 2 (CO 2 ) 4 (NO 3 )] for NENU‐505 All the rigid flat H abtc 3− linkers align along both sides of the helical chain through coordination to uranyl nodes (Figure b).…”

Applications of MOFs as Luminescent Sensors for Environmental Pollutants

“…[133] Up to now, various NACs categories of nitrobenzene (NB), methyl nitrobenzene (NT), nitrophenol (NP) have been detected, especially well-known TNP (Table 1). [134][135][136][137][138][139][140][141][142][143][144][145][146][147][148][149][150][151][152][153] In 2009, Li group firstly reported a luminescent [Zn 2 (bpdc) 2 (bpee)] for explosives sensing, offering a new application of microporous MOFs. [41] Inspired by this work, they further built another microporous LMOF of [Zn 2 (oba) 2 (bpy)]• 3DMA.…”