Diamine-appended metal–organic frameworks: enhanced formaldehyde-vapor adsorption capacity, superior recyclability and water resistibility

2016 ◽  
Vol 45 (28) ◽  
pp. 11306-11311 ◽  
Author(s):  
Zhong Wang ◽  
WenZhong Wang ◽  
Dong Jiang ◽  
Ling Zhang ◽  
Yali Zheng
Keyword(s):  
Adsorption Capacity ◽  
Metal Organic Frameworks ◽  
Adsorption Properties ◽  
Vapor Adsorption ◽  
Open Metal Sites ◽  
Formaldehyde Vapor ◽  
Metal Organic

This study presents a convenient modification of the well-known MOF, MIL-101, with ethylenediamine (ED) on its open-metal sites to substantially improve the HCHO adsorption properties.

scholarly journals An experimental and computational study of CO2adsorption in the sodalite-type M-BTT (M = Cr, Mn, Fe, Cu) metal–organic frameworks featuring open metal sites

2018 ◽  
Vol 9 (20) ◽  
pp. 4579-4588 ◽  
Author(s):  
Mehrdad Asgari ◽  
Sudi Jawahery ◽  
Eric D. Bloch ◽  
Matthew R. Hudson ◽  
Roxana Flacau ◽  
...  
Keyword(s):  
Molecular Level ◽  
Computational Study ◽  
Metal Organic Frameworks ◽  
Adsorption Properties ◽  
Open Metal Sites ◽  
Metal Organic ◽  
Insight Into

The work provides molecular level insight into the CO2adsorption properties of an isostructural series of MOFs, known as M-BTT.

Tuning the Redox Activity of Metal−Organic Frameworks for Enhanced, Selective O2 Binding

2019 ◽  
Author(s):  
Andrew Rosen ◽  
M. Rasel Mian ◽  
Timur Islamoglu ◽  
Haoyuan Chen ◽  
Omar Farha ◽  
...  
Keyword(s):  
Density Functional ◽  
Metal Organic Frameworks ◽  
Redox Activity ◽  
Screening Methods ◽  
Bridging Ligands ◽  
Metal Centers ◽  
Computational Screening ◽  
Open Metal Sites ◽  
Metal Organic ◽  
Unsaturated Metal Sites

<p>Metal−organic frameworks (MOFs) with coordinatively unsaturated metal sites are appealing as adsorbent materials due to their tunable functionality and ability to selectively bind small molecules. Through the use of computational screening methods based on periodic density functional theory, we investigate O<sub>2</sub> and N<sub>2</sub> adsorption at the coordinatively unsaturated metal sites of several MOF families. A variety of design handles are identified that can be used to modify the redox activity of the metal centers, including changing the functionalization of the linkers (replacing oxido donors with sulfido donors), anion exchange of bridging ligands (considering μ-Br<sup>-</sup>, μ-Cl<sup>-</sup>, μ-F<sup>-</sup>, μ-SH<sup>-</sup>, or μ-OH<sup>-</sup> groups), and altering the formal oxidation state of the metal. As a result, we show that it is possible to tune the O<sub>2</sub> affinity at the open metal sites of MOFs for applications involving the strong and/or selective binding of O<sub>2</sub>. In contrast with O<sub>2</sub> adsorption, N<sub>2</sub> adsorption at open metal sites is predicted to be relatively weak across the MOF dataset, with the exception of MOFs containing synthetically elusive V<sup>2+</sup> open metal sites. As one example from the screening study, we predict that exchanging the μ-Cl<sup>-</sup> ligands of M<sub>2</sub>Cl<sub>2</sub>(BBTA) (H<sub>2</sub>BBTA = 1<i>H</i>,5<i>H</i>-benzo(1,2-d:4,5-d′)bistriazole) with μ-OH<sup>-</sup> groups would significantly enhance the strength of O<sub>2</sub> adsorption at the open metal sites without a corresponding increase in the N<sub>2</sub> affinity. Experimental investigation of Co<sub>2</sub>Cl<sub>2</sub>(BBTA) and Co<sub>2</sub>(OH)<sub>2</sub>(BBTA) confirms that the former exhibits only weak physisorption, whereas the latter is capable of chemisorbing O<sub>2</sub> at room temperature. The chemisorption behavior is attributed to the greater electron-donating character of the μ-OH<sup>-</sup><sub> </sub>ligands and the presence of H-bonding interactions between the μ-OH<sup>-</sup> bridging ligands and the O<sub>2</sub> adsorbate.</p>

Effect of Lithium Doping on the Structures and CO 2 Adsorption Properties of Metal‐Organic Frameworks HKUST‐1

2018 ◽  
Vol 3 (45) ◽  
pp. 12865-12870 ◽  
Author(s):  
Lingling Zhou ◽  
Zhaodong Niu ◽  
Xu Jin ◽  
Lihong Tang ◽  
Liping Zhu
Keyword(s):  
Metal Organic Frameworks ◽  
Adsorption Properties ◽  
Lithium Doping ◽  
Metal Organic

scholarly journals Metal Organic Framework-Polyethersulfone Composite Membrane for Iodine Capture

Polymers ◽  
2020 ◽  
Vol 12 (10) ◽  
pp. 2309
Author(s):  
Po-Hsiang Tang ◽  
Pamela Berilyn So ◽  
Kueir-Rarn Lee ◽  
Yu-Lun Lai ◽  
Cheng-Shiuan Lee ◽  
...  
Keyword(s):  
Adsorption Capacity ◽  
Promising Result ◽  
Metal Organic Framework ◽  
Metal Organic Frameworks ◽  
Mixed Matrix Membranes ◽  
Iodine Vapor ◽  
Mixing Ratio ◽  
Mixed Matrix ◽  
Metal Organic ◽  
Iodine Adsorption

A variety of metal organic frameworks (MOFs) were synthesized and evaluated for their iodine adsorption capacity. Out of the MOFs tested, ZIF-8 showed the most promising result with an iodine vapor uptake of 876.6 mg/g. ZIF-8 was then incorporated into a polymer, polyethersulfone (PES), at different proportions to prepare mixed matrix membranes (MMMs), which were then used to perform further iodine adsorption experiments. With a mixing ratio of 40 wt % of ZIF-8, the iodine adsorption capacity reached 1387.6 mg/g, wherein an astounding 60% improvement in adsorption was seen with the MMMs prepared compared to the original ZIF-8 powder.

scholarly journals Innenrücktitelbild: Understanding CO2Dynamics in Metal-Organic Frameworks with Open Metal Sites (Angew. Chem. 16/2013)

2013 ◽  
Vol 125 (16) ◽  
pp. 4589-4589
Author(s):  
Li-Chiang Lin ◽  
Jihan Kim ◽  
Xueqian Kong ◽  
Eric Scott ◽  
Thomas M. McDonald ◽  
...  
Keyword(s):  
Metal Organic Frameworks ◽  
Open Metal Sites ◽  
Metal Organic

New Functionalized Metal–Organic Frameworks MIL-47-X (X = −Cl, −Br, −CH3, −CF3, −OH, −OCH3): Synthesis, Characterization, and CO2 Adsorption Properties

2013 ◽  
Vol 117 (44) ◽  
pp. 22784-22796 ◽  
Author(s):  
Shyam Biswas ◽  
Danny E. P. Vanpoucke ◽  
Toon Verstraelen ◽  
Matthias Vandichel ◽  
Sarah Couck ◽  
...  
Keyword(s):  
Co2 Adsorption ◽  
Metal Organic Frameworks ◽  
Adsorption Properties ◽  
Metal Organic
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