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Molecules
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Preparation and Application of MOF Materials
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Preparation and Application of MOF Materials

A special issue of Molecules (ISSN 1420-3049). This special issue belongs to the section "Electrochemistry".

Deadline for manuscript submissions: closed (30 April 2022) | Viewed by 6095

Special Issue Editor

Dr. Gen Zhang

E-Mail Website
Guest Editor
School of Chemical Engineering, Nanjing University of Science and Technology, Nanjing, China
Interests: covalent organic frameworks; metal organic frameworks; self-assemble; molecular dynamics; solid-state Li+&battery; ion conducting
Special Issues, Collections and Topics in MDPI journals

Special Issue Information

A proton conductor is a unique type of electrolyte that allows protons to pass through quickly and can effectively block electron transport. They have been widely used in solid-state electrochromic displays, hydrogen sensors, fuel cells, catalytic synthesis, biological probes, humidity sensors and other fields. For decades, the synthesis of excellent proton conductors has been of interest to scholars. Metal–organic frameworks (MOFs) are a type of crystalline porous material. Their channels are convenient for proton transport, and the structures are designable and controllable, which opens up new possibilities for researchers to explore the synthesis of new proton conductors. Furthermore, the microstructure of MOFs is clear, indicating that they can provide a favorable platform for the study of the proton conduction mechanism.

Dr. Gen Zhang
Guest Editor

Manuscript Submission Information

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Please visit the Instructions for Authors page before submitting a manuscript. The Article Processing Charge (APC) for publication in this open access journal is 2700 CHF (Swiss Francs). Submitted papers should be well formatted and use good English. Authors may use MDPI's English editing service prior to publication or during author revisions.

Keywords

  • synthesis
  • proton conductor
  • porous
  • metal–organic frameworks
  • mechanism study

Published Papers (2 papers)

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Research

13 pages, 5219 KiB  
Article
Fluorescein Hydrazide-Appended Metal–Organic Framework as a Chromogenic and Fluorogenic Chemosensor for Mercury Ions
by Aasif Helal, Muhammed Naeem, Mohammed Fettouhi and Md. Hasan Zahir
Molecules 2021, 26(19), 5773; https://doi.org/10.3390/molecules26195773 - 23 Sep 2021
Cited by 5 | Viewed by 2466
Abstract
In this work, we prepared a fluorescein hydrazide-appended Ni(MOF) (Metal–Organic Framework) [Ni3(BTC)2(H2O)3]·(DMF)3(H2O)3 composite, FH@Ni(MOF). This composite was well-characterized by PXRD (powder X-ray diffraction), FT-IR (Fourier transform infrared spectroscopy), N2 [...] Read more.
In this work, we prepared a fluorescein hydrazide-appended Ni(MOF) (Metal–Organic Framework) [Ni3(BTC)2(H2O)3]·(DMF)3(H2O)3 composite, FH@Ni(MOF). This composite was well-characterized by PXRD (powder X-ray diffraction), FT-IR (Fourier transform infrared spectroscopy), N2 adsorption isotherm, TGA (thermogravimetric analysis), XPS (X-ray photoelectron spectroscopy), and FESEM (field emission scanning electron microscopy). This composite was then tested with different heavy metals and was found to act as a highly selective and sensitive optical sensor for the Hg2+ ion. It was found that the aqueous emulsion of this composite produces a new peak in absorption at 583 nm, with a chromogenic change to a pink color visible to the naked eye upon binding with Hg2+ ions. In emission, it enhances fluorescence with a fluorogenic change to green fluorescence upon complexation with the Hg2+ ion. The binding constant was found to be 9.4 × 105 M−1, with a detection limit of 0.02 μM or 5 ppb. This sensor was also found to be reversible and could be used for seven consecutive cycles. It was also tested for Hg2+ ion detection in practical water samples from ground water, tap water, and drinking water. Full article
(This article belongs to the Special Issue Preparation and Application of MOF Materials)
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11 pages, 3842 KiB  
Communication
Gram-Scale Synthesis of an Ultrastable Microporous Metal-Organic Framework for Efficient Adsorptive Separation of C2H2/CO2 and C2H2/CH4
by Nuo Xu, Yunjia Jiang, Wanqi Sun, Jiahao Li, Lingyao Wang, Yujie Jin, Yuanbin Zhang, Dongmei Wang and Simon Duttwyler
Molecules 2021, 26(17), 5121; https://doi.org/10.3390/molecules26175121 - 24 Aug 2021
Cited by 1 | Viewed by 2933
Abstract
A highly water and thermally stable metal-organic framework (MOF) Zn2(Pydc)(Ata)2 (1, H2Pydc = 3,5-pyridinedicarboxylic acid; HAta = 3-amino-1,2,4-triazole) was synthesized on a large scale using inexpensive commercially available ligands for efficient separation of C2H [...] Read more.
A highly water and thermally stable metal-organic framework (MOF) Zn2(Pydc)(Ata)2 (1, H2Pydc = 3,5-pyridinedicarboxylic acid; HAta = 3-amino-1,2,4-triazole) was synthesized on a large scale using inexpensive commercially available ligands for efficient separation of C2H2 from CH4 and CO2. Compound 1 could take up 47.2 mL/g of C2H2 under ambient conditions but only 33.0 mL/g of CO2 and 19.1 mL/g of CH4. The calculated ideal absorbed solution theory (IAST) selectivities for equimolar C2H2/CO2 and C2H2/CH4 were 5.1 and 21.5, respectively, comparable to those many popular MOFs. The Qst values for C2H2, CO2, and CH4 at a near-zero loading in 1 were 43.1, 32.1, and 22.5 kJ mol−1, respectively. The practical separation performance for C2H2/CO2 mixtures was further confirmed by column breakthrough experiments. Full article
(This article belongs to the Special Issue Preparation and Application of MOF Materials)
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