3D lanthanide-coordination frameworks constructed by a ternary mixed-ligand: crystal structure, luminescence and luminescence sensing

Abstract

Highly stable 3D Ln-MOFs were constructed by a ternary mixed-ligand. The Sm/Dy-MOFs present dual-emission while the Tb/Eu-MOFs exhibit red/green MC emission. The detection of quercetin and Fe3+ion was realized based on the luminescence Eu-MOF under the excitation of 358 nm.

Cinnamal Sensing and Luminescence Color Tuning in a Series of Rare-Earth Metal−Organic Frameworks with Trans-1,4-cyclohexanedicarboxylate

“…Instead, the photoexcitation is released through a phen-centered π*→π transition, which is usually not very effective, as a great deal of the energy is released through a nonemitting relaxation along multiple vibrational states of the antenna ligand. Keeping in mind that the compounds 1-3 are completely isostructural, the coordination matrix 1 with low luminescence activity can be employed for the dilution of photoactive Eu 3+ and/or Tb 3+ cations in the homogeneous crystalline phase [52][53][54][55][56][57]. Such lanthanide doping of the yttrium framework could (i) improve the luminescence efficiency by reducing the concentration quenching known for such luminophores (Eu 3+ , Tb 3+ ) and (ii) allow the mixing of the luminescence colors for more complex optical properties.…”

Crystal structure of diaqua-bis(μ2-5-chloro-salicylato-κ3 O,O′:O′)-bis(5-chloro-salicylato-κ2 O,O′)-bis(1,10-phenanthroline-κ2 N,N′) dilead(II) – water (1/2), C52H36C14N4O14Pb2·2(H2O)

“…Salicylic acid (H 2 sal) and deprotonated derivatives are used as carboxylate ligands [4,5]. 1,10-Phenanthroline (phen) often acts as a chelating ligand for its high affinity to metal ions and also plays an important role in the development of supramolecular chemistry [6,7]. Furthermore, lead(II) complexes have received considerable attention due to the coordination and interesting stereochemical activity of the valence shell lone electron pairs [8,9].…”

A Facile One-Pot Approach to the Synthesis of Gd-Eu Based Metal-Organic Frameworks and Applications to Sensing of Fe3+ and Cr2O72− Ions

“…Up to date, syntheses of Ln-MOFs have been essentially carried out through microwave, electrochemical or mechanochemical processes and solvothermal route [ 37 , 38 , 39 ], where high pressure, organic solvents and, in some cases, very long reaction times are required. Recently, the need to develop an up-scalable, green synthetic process, of great interest in terms of industrial requirements, has been the focus of a review addressing the green synthesis of transition metal MOFs [ 40 ].…”