Reprint of proton uptake vs. redox driven release from metal–organic-frameworks: Alizarin red S reactivity in UMCM-1

2013 ◽  
Vol 710 ◽  
pp. 2-9 ◽  
Author(s):  
Jonathan E. Halls ◽  
Sunyhik D. Ahn ◽  
Dongmei Jiang ◽  
Luke L. Keenan ◽  
Andrew D. Burrows ◽  
...  
Keyword(s):  
Metal Organic Frameworks ◽  
Alizarin Red S ◽  
Alizarin Red ◽  
Metal Organic ◽  
Proton Uptake

Proton uptake vs. redox driven release from metal–organic-frameworks: Alizarin red S reactivity in UMCM-1

2013 ◽  
Vol 689 ◽  
pp. 168-175 ◽  
Author(s):  
Jonathan E. Halls ◽  
Sunyhik D. Ahn ◽  
Dongmei Jiang ◽  
Luke L. Keenan ◽  
Andrew D. Burrows ◽  
...  
Keyword(s):  
Metal Organic Frameworks ◽  
Alizarin Red S ◽  
Alizarin Red ◽  
Metal Organic ◽  
Proton Uptake

Design of dual-signal sensing platform for D-penicillamine based on UiO-66-NH2 MOFs and APBA@Alizarin Red

The Analyst ◽  
2021 ◽  
Author(s):  
Nan Wang ◽  
Youwei Wu ◽  
Mengke Wang ◽  
Zhengxuan Li ◽  
Guannan Wang ◽  
...  
Keyword(s):  
Boronic Acid ◽  
Metal Organic Frameworks ◽  
Acid Group ◽  
Alizarin Red ◽  
Sensing Platform ◽  
Metal Organic ◽  
Aminophenylboronic Acid

Herein, we designed a diversified sensing platform for D-penicillamine based on amino-functionalized Zr-based metal–organic frameworks (UiO-66-NH2 MOFs) and 3-aminophenylboronic acid (APBA)@Alizarin Red (ARS). The boronic acid group of 3-aminophenylboronic acid...

scholarly journals Adsorption of Malachite Green and Alizarin Red S Dyes Using Fe-BTC Metal Organic Framework as Adsorbent

2021 ◽  
Vol 22 (2) ◽  
pp. 788
Author(s):  
Giulia Rossella Delpiano ◽  
Davide Tocco ◽  
Luca Medda ◽  
Edmond Magner ◽  
Andrea Salis
Keyword(s):  
Malachite Green ◽  
Organic Dyes ◽  
Metal Organic Framework ◽  
Alizarin Red S ◽  
Alizarin Red ◽  
Industrial Sectors ◽  
Vis Spectroscopy ◽  
Wide Range ◽  
Metal Organic ◽  
Pseudo Second Order

Synthetic organic dyes are widely used in various industrial sectors but are also among the most harmful water pollutants. In the last decade, significant efforts have been made to develop improved materials for the removal of dyes from water, in particular, on nanostructured adsorbent materials. Metal organic frameworks (MOFs) are an attractive class of hybrid nanostructured materials with an extremely wide range of applications including adsorption. In the present work, an iron-based Fe-BTC MOF, prepared according to a rapid, aqueous-based procedure, was used as an adsorbent for the removal of alizarin red S (ARS) and malachite green (MG) dyes from water. The synthesized material was characterized in detail, while the adsorption of the dyes was monitored by UV-Vis spectroscopy. An optimal adsorption pH of 4, likely due to the establishment of favorable interactions between dyes and Fe-BTC, was found. At this pH and at a temperature of 298 K, adsorption equilibrium was reached in less than 30 min following a pseudo-second order kinetics, with k″ of 4.29 × 10−3 and 3.98 × 10−2 g∙mg−1 min−1 for ARS and MG, respectively. The adsorption isotherm followed the Langmuir model with maximal adsorption capacities of 80 mg∙g−1 (ARS) and 177 mg∙g−1 (MG), and KL of 9.30·103 L∙mg−1 (ARS) and 51.56·103 L∙mg−1 (MG).

Metal-Organic Frameworks

2021 ◽  
Author(s):  
Lars Öhrström ◽  
Francoise M. Amombo Noa
Keyword(s):  
Metal Organic Frameworks ◽  
Metal Organic

Substrate templated synthesis of single-phase and uniform Zr-porphyrin-based metal–organic frameworks

2020 ◽  
Vol 7 (1) ◽  
pp. 221-231
Author(s):  
Seong Won Hong ◽  
Ju Won Paik ◽  
Dongju Seo ◽  
Jae-Min Oh ◽  
Young Kyu Jeong ◽  
...  
Keyword(s):  
Chemical Bath Deposition ◽  
Single Phase ◽  
Metal Organic Frameworks ◽  
Templated Synthesis ◽  
Pore Structures ◽  
Phase Pure ◽  
Metal Organic ◽  
Cbd Method

We successfully demonstrate that the chemical bath deposition (CBD) method is a versatile method for synthesizing phase-pure and uniform MOFs by controlling their nucleation stages and pore structures.

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>

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