Lanthanide-MOFs as multifunctional luminescent sensors

Zhang

et al. 2023

Inorg. Chem. Front.

Self Cite

Section: Luminescence Emission Properties Of Eu-bdc-nh 2 /Tdamentioning

confidence: 99%

A ratiometric fluorescent probe based on a dual-ligand lanthanide metal–organic framework (MOF) for sensitive detection of aluminium and fluoride ions in river and tap water

Zhang

et al. 2023

Inorg. Chem. Front.

Self Cite

“…[17][18][19][20] In recent years, small molecules, ions, solvents, gases, biomolecules, pH, temperature and other types of analytes have been efficiently detected by MOF-based fluorescent sensors. [21][22][23][24][25][26][27][28] The detection mechanism based on MOFs is also attributed to the electron/ energy transfer, which is closely related to the weak interactions (p-p stacking or hydrogen bonds) between the MOFs and the analytes. [29][30][31] Of the reported MOF-based fluorescent sensors, some sensors predominately show quenched emission, defined as ''turn-off'' sensors.…”

Section: Introductionmentioning

confidence: 99%

A novel 2D metal–organic framework probe: a highly sensitive and visual fluorescent sensor for Al³⁺, Cr³⁺ and Fe³⁺ ions

Shi

et al. 2022

New J. Chem.

“…To properly analyze the turning-off process in the full concentration region, the curve was fitted to polynomial expression that considers both a static and a dynamic quenching (see the ESI for further details) [85]. The K sv calculated for the whole range was estimated to be of 1.4 × 10 5 M −1 (R 2 = 0.998), which is, as far as we are aware, among the best results found for other lanthanide-based MOFs reported so far (usually in the range of 10 −4 M −1 , see Table 3) [30,86]. (TATMA) The limit of detection (LOD) is as low as 5.6 × 10 −7 M, a fact that reveals the great capacity of this material to detect the TNP molecule.…”

Section: Sensing Experimentsmentioning

confidence: 61%

Lanthanide(III) Ions and 5-Methylisophthalate Ligand Based Coordination Polymers: An Insight into Their Photoluminescence Emission and Chemosensing for Nitroaromatic Molecules

Pajuelo-Corral

Razquin-Bobillo²,

Garcı́a³

et al. 2022

Nanomaterials

The work presented herein reports on the synthesis, structural and physico-chemical characterization, luminescence properties and luminescent sensing activity of a family of isostructural coordination polymers (CPs) with the general formula [Ln2(μ4-5Meip)3(DMF)]n (where Ln(III) = Sm (1Sm), Eu (2Eu), Gd (3Gd), Tb (4Tb) and Yb (5Yb) and 5Meip = 5-methylisophthalate, DMF = N,N-dimethylmethanamide). Crystal structures consist of 3D frameworks tailored by the linkage between infinite lanthanide(III)-carboxylate rods by means of the tetradentate 5Meip ligands. Photoluminescence measurements in solid state at variable temperatures reveal the best-in-class properties based on the capacity of the 5Meip ligand to provide efficient energy transfers to the lanthanide(III) ions, which brings intense emissions in both the visible and near-infrared (NIR) regions. On the one hand, compound 5Yb displays characteristic lanthanide-centered bands in the NIR with sizeable intensity even at room temperature. Among the compounds emitting in the visible region, 4Tb presents a high QY of 63%, which may be explained according to computational calculations. At last, taking advantage of the good performance as well as high chemical and optical stability of 4Tb in water and methanol, its sensing capacity to detect 2,4,6-trinitrophenol (TNP) among other nitroaromatic-like explosives has been explored, obtaining high detection capacity (with Ksv around 105 M−1), low limit of detection (in the 10−6–10−7 M) and selectivity among other molecules (especially in methanol).