Mixed precious-group metal–organic frameworks: a case study of the HKUST-1 analogue [RuxRh3−x(BTC)2]

2019 ◽  
Vol 48 (32) ◽  
pp. 12031-12039 ◽  
Author(s):  
Werner R. Heinz ◽  
Tim Kratky ◽  
Markus Drees ◽  
Andreas Wimmer ◽  
Ondřej Tomanec ◽  
...  
Keyword(s):  
Metal Organic Frameworks ◽  
Group Metal ◽  
Metal Organic

Mixed precious-group metal–organic frameworks [RuxRh3−x(BTC)2] of the HKUST-1-type were synthesized and characterized (PXRD, BET, IR, Raman, XPS, TGA, SS-UV/VIS, EA, and HR-TEM).

Thermal Defect Engineering of Precious Group Metal–Organic Frameworks: A Case Study on Ru/Rh-HKUST-1 Analogues

2020 ◽  
Vol 12 (36) ◽  
pp. 40635-40647 ◽  
Author(s):  
Werner R. Heinz ◽  
Iker Agirrezabal-Telleria ◽  
Raphael Junk ◽  
Jan Berger ◽  
Junjun Wang ◽  
...  
Keyword(s):  
Metal Organic Frameworks ◽  
Defect Engineering ◽  
Group Metal ◽  
Thermal Defect ◽  
Metal Organic

Metal-Organic Frameworks vs. Buffers: Case Study of UiO-66 Stability

2020 ◽  
Author(s):  
Daniel Bůžek ◽  
Slavomír Adamec ◽  
Kamil Lang ◽  
Jan Demel
Keyword(s):  
Inductively Coupled Plasma ◽  
Buffer Capacity ◽  
Metal Organic Framework ◽  
Metal Organic Frameworks ◽  
Analytical Techniques ◽  
Aqueous Dispersions ◽  
Inductively Coupled ◽  
Plasma Mass Spectrometry ◽  
Metal Organic

<div><p>UiO-66 is a zirconium-based metal-organic framework (MOF) that has numerous applications. Our group recently determined that UiO-66 is not as inert in aqueous dispersions as previously reported in the literature. The present work therefore assessed the behaviour of UiO-66 in buffers: 2-amino-2-(hydroxymethyl)-1,3-propanediol (TRIS), 4-(2-hydroxyethyl)piperazine-1-ethane sulfonic acid (HEPES), N-ethylmorpholine (NEM) and phosphate buffer (PB), all of which are commonly used in many UiO-66 applications. High pressure liquid chromatography and inductively coupled plasma mass spectrometry were used to monitor degradation of the MOF. In each buffer, the terephthalate linker was released to some extent, with a more pronounced leaching effect in the saline forms of these buffers. The HEPES buffer was found to be the most benign, whereas NEM and PB should be avoided at any concentration as they were shown to rapidly degrade the UiO-66 framework. Low concentration TRIS buffers are also recommended, although these offer minimal buffer capacity to adjust pH. Regardless of the buffer used, rapid terephthalate release was observed, indicating that the UiO-66 was attacked immediately after mixing with the buffer. In addition, the dissolution of zirconium, observed in some cases, intensified the UiO-66 decomposition process. These results demonstrate that sensitive analytical techniques have to be used to monitor the release of MOF components so as to quantify the stabilities of these materials in liquid environments.</p></div>

Achieving Large Volumetric Gas Storage Capacity in Metal–Organic Frameworks by Kinetic Trapping: A Case Study of Xenon Loading in MFU-4

2018 ◽  
Vol 140 (32) ◽  
pp. 10191-10197 ◽  
Author(s):  
Hana Bunzen ◽  
Felicitas Kolbe ◽  
Andreas Kalytta-Mewes ◽  
German Sastre ◽  
Eike Brunner ◽  
...  
Keyword(s):  
Storage Capacity ◽  
Metal Organic Frameworks ◽  
Gas Storage ◽  
Metal Organic ◽  
Kinetic Trapping

On the Electronic and Optical Properties of Metal–Organic Frameworks: Case Study of MIL-125 and MIL-125-NH2

2020 ◽  
Vol 124 (7) ◽  
pp. 4065-4072 ◽  
Author(s):  
Gloria Capano ◽  
Francesco Ambrosio ◽  
Stavroula Kampouri ◽  
Kyriakos C. Stylianou ◽  
Alfredo Pasquarello ◽  
...  
Keyword(s):  
Optical Properties ◽  
Metal Organic Frameworks ◽  
Electronic And Optical Properties ◽  
Metal Organic

Metal-Organic Frameworks vs. Buffers: Case Study of UiO-66 Stability

2020 ◽  
Author(s):  
Daniel Bůžek ◽  
Slavomír Adamec ◽  
Kamil Lang ◽  
Jan Demel
Keyword(s):  
Inductively Coupled Plasma ◽  
Buffer Capacity ◽  
Metal Organic Framework ◽  
Metal Organic Frameworks ◽  
Analytical Techniques ◽  
Aqueous Dispersions ◽  
Inductively Coupled ◽  
Plasma Mass Spectrometry ◽  
Metal Organic

<div><p>UiO-66 is a zirconium-based metal-organic framework (MOF) that has numerous applications. Our group recently determined that UiO-66 is not as inert in aqueous dispersions as previously reported in the literature. The present work therefore assessed the behaviour of UiO-66 in buffers: 2-amino-2-(hydroxymethyl)-1,3-propanediol (TRIS), 4-(2-hydroxyethyl)piperazine-1-ethane sulfonic acid (HEPES), N-ethylmorpholine (NEM) and phosphate buffer (PB), all of which are commonly used in many UiO-66 applications. High pressure liquid chromatography and inductively coupled plasma mass spectrometry were used to monitor degradation of the MOF. In each buffer, the terephthalate linker was released to some extent, with a more pronounced leaching effect in the saline forms of these buffers. The HEPES buffer was found to be the most benign, whereas NEM and PB should be avoided at any concentration as they were shown to rapidly degrade the UiO-66 framework. Low concentration TRIS buffers are also recommended, although these offer minimal buffer capacity to adjust pH. Regardless of the buffer used, rapid terephthalate release was observed, indicating that the UiO-66 was attacked immediately after mixing with the buffer. In addition, the dissolution of zirconium, observed in some cases, intensified the UiO-66 decomposition process. These results demonstrate that sensitive analytical techniques have to be used to monitor the release of MOF components so as to quantify the stabilities of these materials in liquid environments.</p></div>

Noble Metals Can Have Different Effects on Photocatalysis Over Metal-Organic Frameworks (MOFs): A Case Study on M/NH2-MIL-125(Ti) (M=Pt and Au)

2014 ◽  
Vol 20 (16) ◽  
pp. 4780-4788 ◽  
Author(s):  
Dengrong Sun ◽  
Wenjun Liu ◽  
Yanghe Fu ◽  
Zhenxing Fang ◽  
Fangxiang Sun ◽  
...  
Keyword(s):  
Noble Metals ◽  
Metal Organic Frameworks ◽  
Metal Organic

scholarly journals Isoreticular Linker Substitution in Conductive Metal–Organic Frameworks with Through-Space Transport Pathways

2020 ◽  
Author(s):  
Lilia S. Xie ◽  
Sarah S. Park ◽  
Michał J. Chmielewski ◽  
Hanyu Liu ◽  
Ruby A. Kharod ◽  
...  
Keyword(s):  
Charge Transport ◽  
Metal Organic Frameworks ◽  
Three Dimensional ◽  
Strong Interactions ◽  
Conductivity Data ◽  
Electrically Conductive ◽  
Transport Pathways ◽  
Intermolecular Contacts ◽  
Metal Organic

<p>The extension of reticular chemistry concepts to electrically conductive three-dimensional metal-organic frameworks (MOFs) has been challenging, particularly for cases in which strong interactions between electroactive linkers create the charge transport pathways. Here, we report the successful replacement of tetrathiafulvalene (TTF) with a nickel glyoximate core in a family of isostructural conductive MOFs with Mn<sup>2+</sup>, Zn<sup>2+</sup>, and Cd<sup>2+</sup>. Different coordination environments of the framework metals lead to variations in the linker stacking geometries and optical properties. Single crystal conductivity data are consistent with charge transport along the linker stacking direction, with conductivity values only slightly lower than those reported for the analogous TTF materials. These results serve as a case study demonstrating how reticular chemistry design principles can be extended to conductive frameworks with significant intermolecular contacts.</p>

Sign in / Sign up

Export Citation Format

Share Document