Towards multifunctional lanthanide-based metal–organic frameworks

Abstract

We report the synthesis, structure and physicochemical attributes of a new holmium(III)-based metal-organic framework whose 3D network structure gives rise to porosity; the reported structuretype can be varied using a range of different lanthanide ions to tune the photophysical properties and produce ligand-sensitised nearinfrared (NIR) and visible light emitters.Metal-organic frameworks (MOFs) are fascinating metallosupramolecular systems in which metal ions or polynuclear complexes are linked through organic ligands. Herein we report a synthetic approach to highly augmented lanthanide-based MOFs that give rise to porosity. The resulting structures can be regarded as multifunctional materials whereby their photophysical and magnetic properties can be tuned by the nature of the used lanthanide ion producing ligand-sensitised

Biomineralized Nano-Assemblies of Poly(Ethylene Glycol) Derivative with Lanthanide Ions as Ratiometric Fluorescence Sensors for Detection of Water and Fe3+ Ions

“…In contrast, MOFs, known as crystalline polymers generated from metal ions and organic ligands, have emerged as important candidates for chemosensory materials owing to their porous structures and high surface areas [ 10 ]. The self-assembly of Ln 3+ ions with suitable organic linkers into porous MOFs can render a powerful luminescent platform [ 11 ]. Mixed-crystal LnMOFs, adopting two or more Ln ions, could be designed as ratiometric fluorescent sensors to afford more accurate measurement by virtue of the self-calibration of two signal peaks, avoiding the influence of several environmental factors on the absolute fluorescence intensity of a single emissive transition [ 12 ].…”

2D Porphyrinic Metal-Organic Frameworks Featuring Rod-Shaped Secondary Building Units

“…To date, tens of thousands of MOFs have been reported in the literature [ 7 , 8 , 9 , 10 , 11 ]. The vast majority of these structures, including the archetypal frameworks MOF-5 [Zn 4 O(BDC) 3 ] (BDC = 1,4-benzene dicarboxylate) and HKUST-1 [Cu 3 (BTC) 2 (H 2 O) 3 ] (HKUST = Hong Kong University of Science and Technology, BTC = benzene-1,3,5-tricarboxylate), comprise discrete SBUs [ 12 , 13 ].…”

A Sensor for Trace H2O Detection in D2O

“…The Bigger Picture structural components provide access to materials with a high volumetric density of structurally identical emission centers, which enables a large photoluminescent sensor response from a small quantity of material. 10 Rational design principles in MOF chemistry also permit a degree of control over Ln-Ln separation distances in the solid state. Such tunability allows for optimization of the luminescence properties; this parameter is virtually impossible to control in the solution phase.…”