scholarly journals Luminescent and Magnetic Tb-MOF Flakes Deposited on Silicon

Molecules ◽  
2021 ◽  
Vol 26 (18) ◽  
pp. 5503
Author(s):  
Elena Bartolomé ◽  
Ana Arauzo ◽  
Sergio Herce ◽  
Anna Palau ◽  
Narcis Mestres ◽  
...  

The synthesis of a terbium-based 2D metal–organic framework (MOF), of formula [Tb(MeCOO)(PhCOO)2] (1), a crystalline material formed by neutral nanosheets held together by Van der Waals interactions, is presented. The material can be easily exfoliated by sonication and deposited onto different substrates. Uniform distributions of Tb-2D MOF flakes onto silicon were obtained by spin-coating. We report the luminescent and magnetic properties of the deposited flakes compared with those of the bulk. Complex 1 is luminescent in the visible and has a sizeable quantum yield of QY = 61% upon excitation at 280 nm. Photoluminescence measurements performed using a micro-Raman set up allowed us to characterize the luminescent spectra of individual flakes on silicon. Magnetization measurements of flakes-on-silicon with the applied magnetic field in-plane and out-of-plane display anisotropy. Ac susceptibility measurements show that 1 in bulk exhibits field-induced slow relaxation of the magnetization through two relaxation paths and the slowest one, with a relaxation time of τlf ≈ 0.5 s, is assigned to a direct process mechanism. The reported exfoliation of lanthanide 2D-MOFs onto substrates is an attractive approach for the development of multifunctional materials and devices for different applications.

2015 ◽  
Vol 68 (1) ◽  
pp. 161 ◽  
Author(s):  
Zhuo-Wei Wang ◽  
Hui Zhao ◽  
Min Chen ◽  
Min Hu

Combination of a non-planar tripodal ligand 3,4-bi(4-carboxyphenyl)-benzoic acid (H3L) and Zn5O4-cluster secondary building units affords a highly connected three-dimensional metal–organic framework, {[Zn5(μ3-OH)3(μ2-OH)L2(H2O)2](H2O)2}n (1), which exhibits an unusual (3,4,9)-connected (42.5)(3.43.52)(32.45.511.613.73.82) topological net. The thermal stability and solid luminescence of the crystalline material have also been investigated.


2019 ◽  
Vol 10 (1) ◽  
Author(s):  
Christian Schneider ◽  
David Bodesheim ◽  
Julian Keupp ◽  
Rochus Schmid ◽  
Gregor Kieslich

Abstract The post-synthetic installation of linker molecules between open-metal sites (OMSs) and undercoordinated metal-nodes in a metal-organic framework (MOF) — retrofitting — has recently been discovered as a powerful tool to manipulate macroscopic properties such as the mechanical robustness and the thermal expansion behavior. So far, the choice of cross linkers (CLs) that are used in retrofitting experiments is based on qualitative considerations. Here, we present a low-cost computational framework that provides experimentalists with a tool for evaluating various CLs for retrofitting a given MOF system with OMSs. After applying our approach to the prototypical system CL@Cu3BTC2 (BTC = 1,3,5-benzentricarboxylate) the methodology was expanded to NOTT-100 and NOTT-101 MOFs, identifying several promising CLs for future CL@NOTT-100 and CL@NOTT-101 retrofitting experiments. The developed model is easily adaptable to other MOFs with OMSs and is set-up to be used by experimentalists, providing a guideline for the synthesis of new retrofitted MOFs with modified physicochemical properties.


2020 ◽  
Vol 19 (12) ◽  
pp. 1730-1740
Author(s):  
Heidi A. Schwartz ◽  
Hannah Laurenzen ◽  
Samuel Kerschbaumer ◽  
Melanie Werker ◽  
Selina Olthof ◽  
...  

The incorporation of photochromic dyes into porous metal–organic frameworks (MOFs) is an attractive way to transfer the photochromic properties of the dye to a solid crystalline material.


2019 ◽  
Vol 55 (68) ◽  
pp. 10056-10059 ◽  
Author(s):  
Timothée Stassin ◽  
Sabina Rodríguez-Hermida ◽  
Benedikt Schrode ◽  
Alexander John Cruz ◽  
Francesco Carraro ◽  
...  

Vapour-phase deposition of copper dicarboxylate metal–organic framework thin films with an out-of-plane orientation and accessible porosity.


2021 ◽  
Author(s):  
Paul Iacomi ◽  
Ji Sun Lee ◽  
Louis Vanduyfhuys ◽  
Kyung-Ho Cho ◽  
Pierre Fertey ◽  
...  

Mercury porosimetry and in situ high pressure single crystal X-ray diffraction revealed the wine-rack CUK-1 MOF as a unique crystalline material capable of a fully reversible mechanical pressure-triggered structural contraction....


2007 ◽  
Vol 6 (10) ◽  
pp. 760-764 ◽  
Author(s):  
Christophe Volkringer ◽  
Dimitry Popov ◽  
Thierry Loiseau ◽  
Nathalie Guillou ◽  
Gerard Ferey ◽  
...  

Nanoscale ◽  
2020 ◽  
Vol 12 (46) ◽  
pp. 23620-23625
Author(s):  
Jie Li ◽  
Ruqian Wu

New functional two-dimensional metal–organic framework materials with room-temperature magnetic ordering, large out-of-plane magnetic anisotropic energy, huge topological band gap, and excellent spin-filtering performance were theoretically predicted.


2019 ◽  
Author(s):  
Timothée Stassin ◽  
Sabina Rodríguez-Hermida ◽  
Benedikt Schrode ◽  
Alexander John Cruz ◽  
Francesco Carraro ◽  
...  

Copper dicarboxylate metal-organic framework films are deposited via chemical vapour deposition. Uniform films of CuBDC and CuCDC with an out-of-plane orientation and accessible porosity are obtained from the reaction of Cu and CuO with vaporised dicarboxylic acid linkers.


Author(s):  
Timothée Stassin ◽  
Sabina Rodríguez-Hermida ◽  
Benedikt Schrode ◽  
Alexander John Cruz ◽  
Francesco Carraro ◽  
...  

Copper dicarboxylate metal-organic framework films are deposited via chemical vapour deposition. Uniform films of CuBDC and CuCDC with an out-of-plane orientation and accessible porosity are obtained from the reaction of Cu and CuO with vaporised dicarboxylic acid linkers.


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