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Molecules
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Porous Organic Polymers for Adsorption, Storage, Separation and Catalysis
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Porous Organic Polymers for Adsorption, Storage, Separation and Catalysis

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

Deadline for manuscript submissions: closed (31 May 2020) | Viewed by 8687

Special Issue Editor

Dr. Himanshu Sekhar Jena

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Guest Editor
Department of Chemistry, Ghent University, Krijgslaan 281-S3, 9000 Ghent, Belgium
Interests: porous organic polymers; covalent triazine framework; adsorption; storage; separation; catalysis
Special Issues, Collections and Topics in MDPI journals

Special Issue Information

Dear Colleagues,

Porous organic polymers (POPs) have recently emerged as smart materials for carbon capture, storage, separation, and catalysis. These materials have gained significant interest in the scientific communities because of their low density, high stability, large surface area, and the possibility to customize their pore volume, size, and modifications. Using such materials, several parameters can be tuned towards achieving high carbon capture, storage, and separation. POPs have also gained significant attention in catalysis, since this sort of catalyst bridges the gap between homogenous and heterogeneous catalysis. Using POPs, three different sorts of catalysis can be achieved: organocatalysis, homogenous metal complex-based catalysis, and nanoparticle-based catalysis.

Within this context, the aim of this Special Issue is to collect articles describing POPs synthesis and applications in carbon capture, storage, separation, and catalysis. From a materials’ perspective, amorphous as well as crystalline porous materials (e.g., covalent organic frameworks (COFs) and covalent triazine frameworks (CTFs)) are of interest. Regarding applications, the scope of the POPs will be extended to dye adsorption, separation of organic pollutants, and chiral separation, in addition to carbon capture, storage, and separation. Organic transformation and the catalytic reactivity of POPs in flow synthesis photocatalysis and electrocatalysis will also be covered in this Special Issue.

Dr. Himanshu Sekhar Jena
Guest Editor

Manuscript Submission Information

Manuscripts should be submitted online at www.mdpi.com by registering and logging in to this website. Once you are registered, click here to go to the submission form. Manuscripts can be submitted until the deadline. All submissions that pass pre-check are peer-reviewed. Accepted papers will be published continuously in the journal (as soon as accepted) and will be listed together on the special issue website. Research articles, review articles as well as short communications are invited. For planned papers, a title and short abstract (about 100 words) can be sent to the Editorial Office for announcement on this website.

Submitted manuscripts should not have been published previously, nor be under consideration for publication elsewhere (except conference proceedings papers). All manuscripts are thoroughly refereed through a single-blind peer-review process. A guide for authors and other relevant information for submission of manuscripts is available on the Instructions for Authors page. Molecules is an international peer-reviewed open access semimonthly journal published by MDPI.

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

  • Porous organic polymers
  • Carbon capture, storage and separation
  • Adsorption and separation of dyes and pollutants
  • Organic synthesis
  • Photocatalysis
  • Electrocatalysis
  • Flow synthesis

Published Papers (2 papers)

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Research

13 pages, 2166 KiB  
Article
Extraction of Ibuprofen from Natural Waters Using a Covalent Organic Framework
by Soraia P. S. Fernandes, Abdelkarim Mellah, Petr Kovář, Marisa P. Sárria, Milan Pšenička, Harik Djamila, Laura M. Salonen and Begoña Espiña
Molecules 2020, 25(14), 3132; https://doi.org/10.3390/molecules25143132 - 8 Jul 2020
Cited by 19 | Viewed by 4320
Abstract
Ibuprofen is one of the most widely used pharmaceuticals, and due to its inefficient removal by conventional wastewater treatment, it can be found in natural surface waters at high concentrations. Recently, we demonstrated that the TpBD-(CF3)2 covalent organic framework (COF) [...] Read more.
Ibuprofen is one of the most widely used pharmaceuticals, and due to its inefficient removal by conventional wastewater treatment, it can be found in natural surface waters at high concentrations. Recently, we demonstrated that the TpBD-(CF3)2 covalent organic framework (COF) can adsorb ibuprofen from ultrapure water with high efficiency. Here, we investigate the performance of the COF for the extraction of ibuprofen from natural water samples from a lake, river, and estuary. In general, the complexity of the natural water matrix induced a reduction in the adsorption efficiency of ibuprofen as compared to ultrapure water. The best performance, with over 70% adsorption efficiency, was found in lake water, the sample which featured the lowest pH. According to the theoretical calculations, ibuprofen more favorably interacts with the COF pores in the protonated form, which could partially account for the enhanced adsorption efficiency found in lake water. In addition, we explored the effect of the presence of competing pharmaceuticals, namely, acetaminophen and phenobarbital, on the ibuprofen adsorption as binary mixtures. Acetaminophen and phenobarbital were adsorbed by TpBD-(CF3)2 with low efficiency and their presence led to an increase in ibuprofen adsorption in the binary mixtures. Overall, this study demonstrates that TpBD-(CF3)2 is an efficient adsorbent for the extraction of ibuprofen from natural waters as well. Full article
(This article belongs to the Special Issue Porous Organic Polymers for Adsorption, Storage, Separation and Catalysis)
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13 pages, 3334 KiB  
Article
Dual-Purpose Materials Based on Carbon Xerogel Microspheres (CXMs) for Delayed Release of Cannabidiol (CBD) and Subsequent Aflatoxin Removal
by Farid B. Cortés, Karol Zapata, Benjamín A. Rojano, Francisco Carrasco-Marín, Jaime Gallego, M. Alejandra Hernández and Camilo A. Franco
Molecules 2019, 24(18), 3398; https://doi.org/10.3390/molecules24183398 - 19 Sep 2019
Cited by 6 | Viewed by 3817
Abstract
The main objective of this study is to develop a novel dual-purpose material based on carbon xerogel microspheres (CXMs) that permits the delayed release of cannabidiol (CBD) and the removal of aflatoxin. The CXMs were prepared by the sol-gel method and functionalized with [...] Read more.
The main objective of this study is to develop a novel dual-purpose material based on carbon xerogel microspheres (CXMs) that permits the delayed release of cannabidiol (CBD) and the removal of aflatoxin. The CXMs were prepared by the sol-gel method and functionalized with phosphoric acid (CXMP) and melamine (CXMN). The support and the modified materials were characterized by scanning electronic microscopy (SEM), N2 adsorption at −196 °C, X-ray photoelectron spectroscopy (XPS), and zeta potential. For the loading of the cannabidiol (CBD) in the porous samples, batch–mode adsorption experiments at 25 °C were performed, varying the concentration of CBD. The desorption kinetics was performed at two conditions for simulating the gastric (pH of 2.1) and intestinal (pH of 7.4) conditions at 37 °C based on in vitro CBD release. Posteriorly, the samples obtained after desorption were used to study aflatoxin removal, which was evaluated through adsorption experiments at pH = 7.4 and 37 °C. The adsorption isotherms of CBD showed a type I(b) behavior, with the adsorbed uptake being higher for the support than for the modified materials with P and N. Meanwhile, the desorption kinetics of CBD at gastric conditions indicated release values lower than 8%, and the remaining amount was desorbed at pH = 7.4 in three hours until reaching 100% based on the in vitro experiments. The results for aflatoxin showed total removal in less than 30 min for all the materials evaluated. This study opens a broader landscape in which to develop dual-purpose materials for the delayed release of CBD, improving its bioavailability and allowing aflatoxin removal in gastric conditions. Full article
(This article belongs to the Special Issue Porous Organic Polymers for Adsorption, Storage, Separation and Catalysis)
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