Unique (3,4,10)-Connected Lanthanide–Organic Framework as a Recyclable Chemical Sensor for Detecting Al³⁺

Abstract

Three isostructural Ln-BTB frameworks (Ln = Eu (1), Dy (2), Yb (3)) were synthesized and structurally characterized, in which mononuclear and trinuclear [Ln3] units as nodes construct unprecedented (3,4,10)-connected 3D frameworks with (4·6·8)4(4·8(2))2(4·8(5))(6(2)·8(4))(4(5)·6(8)·8(26)·10(6)) point symbol. The luminescent investigations revealed that compound 1 can sensitively and selectively detect Al(3+), but comparably compound 2 could not detect Al(3+) among various cations. More importantly, 1 as an Al(3+) sensor can be reused at least five times, which represents the first recyclable metal organic framework (MOF)-supported Al(3+) sensor. Additionally, magnetic investigations on 2 also were carried out, showing a single-molecule-magnet behavior.

Synthesis of Chiral Labtb and Visualization of Its Enantiomeric Excess by Induced Circular Dichroism Imaging

“…[2] These approaches use simple amino acids, [16,21] chiral amine, [22] alkaloids, [19] or nucleotides [20] as ac hiral source, instead of homochiral ligands, which require many synthetic efforts. [25,[35][36][37][38][39][40][41][42][43][44][45][46] As shown in FigureS1a, the obtained powders fit well to that with the space group of R32. Accordingly,t he evaluation of enantiomer excess( ee)i sn ecessary for CMOFs.…”

“…[26] However,t he specimen has been obtained as racemic conglomerates. [25,[35][36][37][38][39][40][41][42][43][44][45][46] As shown in FigureS1a, the obtained powders fit well to that with the space group of R32. The reaction conditions were finely tuned by using CD signals as objective variable.F inally,a strong CD signal was observed when the complex of lanthanum and d-o rl-phenylalanine (Phe) was employed as ap recursor.T he details of the synthetic procedures are shown in the Supporting Information.…”

Determination of Urinary 1‐Hydroxypyrene for Biomonitoring of Human Exposure to Polycyclic Aromatic Hydrocarbons Carcinogens by a Lanthanide‐functionalized Metal‐Organic Framework Sensor

“…Lanthanide metal‐organic frameworks (Ln‐MOFs) are attractive candidates for chemical‐sensing applications due to the perfect combination of the excellent optical properties through an “antenna effect” and the well‐defined porosity of MOFs. Up to now, a series of luminescent MOF‐based sensors has been developed, and their sensing objectives include cations, anions, organic small molecules, gases, and nitro explosives . Nevertheless, to the best of our knowledge, luminescent MOF‐based sensors for sensing urinary 1‐HP have not been reported so far.…”

Three Lanthanide Metal‐Organic Frameworks Based on an Ether‐Decorated Polycarboxylic Acid Linker: Luminescence Modulation, CO2 Capture and Conversion Properties

“…[19][20][21] So the "antenna effect"w as required to enhence the emission of Ln 3 + ions, in which the ligandsc ontaining appropriate absorbing chromophores served as antennas or sensitizers to increase light absorptionand transfer energy to Ln 3 + ions. [22,23] On the other hand, the increasing CO 2 discharge in atmosphere causedb yh uman beings has brought out the serious environmental issue. [24] The developmento fC O 2 capturea nd storaget echnology (CCS)h as become an urgent task.…”