Metal-Organic Frameworks

A special issue of Polymers (ISSN 2073-4360). This special issue belongs to the section "Polymer Applications".

Deadline for manuscript submissions: closed (30 June 2019) | Viewed by 7840

Special Issue Editor


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Guest Editor
Department of Chemistry, Soochow University, Taipei, Taiwan
Interests: coordination polymers; metal–organic frameworks; supramolecular structures for functional applications; structural topology; gas adsorptions; CO2 uptake
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Special Issue Information

Dear Colleagues,

Metal-organic frameworks (MOFs) have emerged as particularly exciting porous materials which can be simply self-assembled from metal ions with organic linkers to create fascinating 2D or 3D structural topologies. The pores within MOFs can be utilized to encapsulate a large number of guest species as energy storage of fuels, capture of gases, separation, etc. The applications of MOFs in societally and industrially relevant fields include gases storage, capture of gases, catalysis, drug delivery sensing, electronic devices, as synthetic precursors to porous materials, and among others. This Special Issue focus on creating a multidisciplinary forum of discussion on recent advances in the attractive and unique properties of MOFs, such as structure flexibility, high surface area, tunable pore size and functionalizable organic linkers and metal centres, which have led to vast array of promising applications. This Special Issue accepts high quality full articles and short communications containing original research results and review articles of exceptional merit.

Of particular interests are (though not exclusively): The design of new organic linkers in the synthesis and structural topology of new porous MOFs, gases (CO2 capture, H2 and CH4) storage, and gas separation, water treatment using adsorptive properties of MOFs, heterogeneous catalysis, photocatalysis, fluorescent sensors, etc.

Prof. Dr. Chih-Chieh Wang
Guest Editor

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Keywords

  • Structural diversity and topology for MOFs
  • Porous MOFs for CO2 capture
  • Porous MOFs for H2 and CH4 storage
  • MOFs for water treatment
  • MOFs for fluorescent sensor
  • MOFs for heterogeneous catalysis
  • MOFs for photocatalysis

Published Papers (2 papers)

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Research

16 pages, 11780 KiB  
Article
Synthesis, Structural Characterization and Ligand-Enhanced Photo-Induced Color-Changing Behavior of Two Hydrogen-Bonded Ho(III)-Squarate Supramolecular Compounds
by Chih-Chieh Wang, Szu-Yu Ke, Yun Feng, Mei-Lin Ho, Chung-Kai Chang, Yu-Chun Chuang and Gene-Hsiang Lee
Polymers 2019, 11(8), 1369; https://doi.org/10.3390/polym11081369 - 19 Aug 2019
Cited by 3 | Viewed by 2898
Abstract
Two coordination polymers (CPs) with chemical formulas, [Ho2(C4O4)2(C2O4)(H2O)8]·4H2O (1) and [Ho(C4O4)1.5(H2O)3] (2 [...] Read more.
Two coordination polymers (CPs) with chemical formulas, [Ho2(C4O4)2(C2O4)(H2O)8]·4H2O (1) and [Ho(C4O4)1.5(H2O)3] (2), (C4O42− = dianion of squaric acid, C2O42− = oxalate), have been synthesized and their structures were determined by single-crystal X-ray diffractometer (XRD). In compound 1, the coordination environment of Ho(III) ion is eight-coordinate bonded to eight oxygen atoms from two squarate, one oxalate ligands and four water molecules. The squarates and oxalates both act as bridging ligands with μ1,2-bis-monodentate and bis-chelating coordination modes, respectively, connecting the Ho(III) ions to form a one-dimensional (1D) ladder-like framework. Adjacent ladders are interlinked via O–H⋅⋅⋅O hydrogen bonding interaction to form a hydrogen-bonded two-dimensional (2D) layered framework and then arranged orderly in an AAA manner to construct its three-dimensional (3D) supramolecular architecture. In compound 2, the coordination geometry of Ho(III) is square-antiprismatic eight coordinate bonded to eight oxygen atoms from five squarate ligands and three water molecules. The squarates act as bridging ligands with two coordination modes, μ1,2,3-trismonodentate and μ1,2-bis-monodentate, connecting the Ho(III) ions to form a 2D bi-layered framework. Adjacent 2D frameworks are then parallel stacked in an AAA manner to construct its 3D supramolecular architecture. Hydrogen bonding interactions between the squarate ligands and coordinated water molecules in 1 and 2 both play important roles on the construction of their 3D supramolecular assembly. Compounds 1 and 2 both show remarkable ligand-enhanced photo-induced color-changing behavior, with their pink crystals immediately turning to yellow crystals under UV light illumination. Full article
(This article belongs to the Special Issue Metal-Organic Frameworks)
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16 pages, 3081 KiB  
Article
Efficient Adsorption of Pb(II) from Aqueous Solutions by Metal Organic Framework (Zn-BDC) Coated Magnetic Montmorillonite
by Jian Shen, Nan Wang, Yang Guang Wang, Di Yu and Xiao–kun Ouyang
Polymers 2018, 10(12), 1383; https://doi.org/10.3390/polym10121383 - 13 Dec 2018
Cited by 38 | Viewed by 4613
Abstract
Composite adsorption materials combine the advantages of various adsorptive materials and compensate for the defects of single adsorbents. Magnetic montmorillonite (MMMT) shows good adsorption properties for Pb(II). In order to further improve the adsorption properties of MMMT, in this work, Zn-BDC, a kind [...] Read more.
Composite adsorption materials combine the advantages of various adsorptive materials and compensate for the defects of single adsorbents. Magnetic montmorillonite (MMMT) shows good adsorption properties for Pb(II). In order to further improve the adsorption properties of MMMT, in this work, Zn-BDC, a kind of metal–organic framework (MOF), was modified onto the surface of MMMT by in situ polymerization. The composite material MMMT@Zn-BDC was characterized by Zetasizer, SEM, TEM, FTIR, XRD, VSM, and XPS. The influence of adsorption conditions on the adsorption capacity of MMMT@Zn-BDC for Pb(II) was examined, including the adsorbent dosage, pH of Pb(II) solution, initial concentration of Pb(II), and the temperature and adsorption time. Also, the adsorption mechanism was studied. The results of this study show that MMMT@Zn-BDC adsorbs Pb(II) via chemisorption. In addition, MMMT@Zn-BDC exhibits good potential for adsorbing Pb(II), including its high adsorption capacity (724.64 mg/g) and good recyclability. Full article
(This article belongs to the Special Issue Metal-Organic Frameworks)
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