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Special Issue "Chemical Transformation of Renewable Material for Green Chemistry"

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

Deadline for manuscript submissions: closed (20 May 2018)

Special Issue Editors

Guest Editor
Dr. Lucia D’Accolti

Chemistry Department-Università degli Studi di Bari, Bari, Italy
Website | E-Mail
Phone: +390805442068
Interests: organocatalysis; oxidation; mechanism of reaction; renewable resources, photocatalysis
Guest Editor
Prof. Dr. Angelo Nacci

Chemistry Department-Università degli Studi di Bari, Bari, Italy
Website | E-Mail
Interests: organometallic chemistry; green synthesis in ionic liquids; metallo-catalysis; nanocatalysis; renewable resources
Guest Editor
Dr. Caterina Fusco

Consiglio Nazionale delle Ricerche - Istituto di Chimica dei Composti OrganoMetallici (ICCOM)-SS Bari- Bari, Italy
Website | E-Mail
Interests: organocatalysis; C-H oxidation; new carbon materials; natural products; renewable resources

Special Issue Information

Dear Colleagues,

In an era facing the depletion of fossil fuels and the increasing environmental concerns related to their burning, much of the current efforts have been directed to searching for more sustainable sources. These can ensure continuous manufacturing of commodities that have improved the quality of human life. As an example, recent years have witnessed a rapid increase in the production of bio-based plastics and polymers, entirely derived from renewable sources. This Special Issue provides a good opportunity for experts to make to point of the research for new, potential applications, and innovation in the biorefinery sector.

The Special Issue will focus on the following key areas: (1) novel catalytic reactions (homogeneous, heterogeneous, microalgae enzymatic, as well as their combinations) applied to bio-based products or reagents. (2) novel materials for manufacturing application (polyurethane, polyesters, etc.). (3) new technologies using flow chemistry, nano-catalysts and, more remarkably, novel combinations of the technologies.

It is our pleasure to invite you to contribute an original research paper or a review article for this Special Issue.

Dr. Lucia D’Accolti
Prof. Dr. Angelo Nacci
Dr. Caterina Fusco
Guest Editors

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 papers will be 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 monthly 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 1800 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

  • Green Chemistry
  • Sustainable
  • Circular Economy
  • Catalysis
  • New Synthetic Technology

Published Papers (5 papers)

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Research

Open AccessFeature PaperArticle Nickel Sulfides Decorated SiC Foam for the Low Temperature Conversion of H2S into Elemental Sulfur
Molecules 2018, 23(7), 1528; https://doi.org/10.3390/molecules23071528
Received: 1 June 2018 / Revised: 20 June 2018 / Accepted: 23 June 2018 / Published: 25 June 2018
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Abstract
The selective oxidation of H2S to elemental sulfur was carried out on a NiS2/SiCfoam catalyst under reaction temperatures between 40 and 80 °C using highly H2S enriched effluents (from 0.5 to 1 vol.%). The amphiphilic properties
[...] Read more.
The selective oxidation of H2S to elemental sulfur was carried out on a NiS2/SiCfoam catalyst under reaction temperatures between 40 and 80 °C using highly H2S enriched effluents (from 0.5 to 1 vol.%). The amphiphilic properties of SiC foam provide an ideal support for the anchoring and growth of a NiS2 active phase. The NiS2/SiC composite was employed for the desulfurization of highly H2S-rich effluents under discontinuous mode with almost complete H2S conversion (nearly 100% for 0.5 and 1 vol.% of H2S) and sulfur selectivity (from 99.6 to 96.0% at 40 and 80 °C, respectively), together with an unprecedented sulfur-storage capacity. Solid sulfur was produced in large aggregates at the outer catalyst surface and relatively high H2S conversion was maintained until sulfur deposits reached 140 wt.% of the starting catalyst weight. Notably, the spent NiS2/SiCfoam catalyst fully recovered its pristine performance (H2S conversion, selectivity and sulfur-storage capacity) upon regeneration at 320 °C under He, and thus, it is destined to become a benchmark desulfurization system for operating in discontinuous mode. Full article
(This article belongs to the Special Issue Chemical Transformation of Renewable Material for Green Chemistry)
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Graphical abstract

Open AccessFeature PaperArticle Encapsulation of Curcumin-Loaded Liposomes for Colonic Drug Delivery in a pH-Responsive Polymer Cluster Using a pH-Driven and Organic Solvent-Free Process
Molecules 2018, 23(4), 739; https://doi.org/10.3390/molecules23040739
Received: 6 February 2018 / Revised: 9 March 2018 / Accepted: 21 March 2018 / Published: 23 March 2018
PDF Full-text (39497 KB) | HTML Full-text | XML Full-text
Abstract
The present study aimed to develop and optimize liposome formulation for the colonic delivery of biologically active compounds. A strategy to facilitate such targeting is to formulate liposomes with a polymer coating sensitive to the pH shifts in the gastrointestinal tract. To this
[...] Read more.
The present study aimed to develop and optimize liposome formulation for the colonic delivery of biologically active compounds. A strategy to facilitate such targeting is to formulate liposomes with a polymer coating sensitive to the pH shifts in the gastrointestinal tract. To this end, liposomes encapsulating curcumin—chosen as the biologically active compound model—and coated with the pH-responsive polymer Eudragit S100 were prepared and characterized. Curcumin was encapsulated into small unilamellar vesicles (SUVs) by the micelle-to-vesicle transition method (MVT) in a simple and organic solvent-free way. Curcumin-loaded liposomes were coated with Eudragit S100 by a fast and easily scalable pH-driven method. The prepared liposomes were evaluated for size, surface morphology, entrapment efficiency, stability, in vitro drug release, and curcumin antioxidant activity. In particular, curcumin-loaded liposomes displayed size lower than 100 nm, encapsulation efficiency of 98%, high stability at both 4 °C and 25 °C, high in vitro antioxidant activity, and a cumulative release that was completed within 200 min. A good Eudragit S100 coating which did not alter the properties of the curcumin-loaded liposomes was obtained. The present work therefore provides a fast and solvent-free method to prepare pH-responsive polymer-coated liposomes for the colonic delivery of biologically active compounds. Full article
(This article belongs to the Special Issue Chemical Transformation of Renewable Material for Green Chemistry)
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Open AccessArticle Recyclable Keggin Heteropolyacids as an Environmentally Benign Catalyst for the Synthesis of New 2-Benzoylamino-N-phenyl-benzamide Derivatives under Microwave Irradiations at Solvent-Free Conditions and the Evaluation of Biological Activity
Received: 19 November 2017 / Revised: 17 December 2017 / Accepted: 20 December 2017 / Published: 21 December 2017
PDF Full-text (967 KB) | HTML Full-text | XML Full-text | Supplementary Files
Abstract
2-Benzoylamino-N-phenyl-benzamide derivatives (5ah) were prepared from 2-phenyl-3,1-(4H)-benzoxazin-4-one 3 and substituted anilines 4ah in the presence of a Keggin-type heteropolyacids series (H3PW12O40·13H2O; H4SiW12
[...] Read more.
2-Benzoylamino-N-phenyl-benzamide derivatives (5ah) were prepared from 2-phenyl-3,1-(4H)-benzoxazin-4-one 3 and substituted anilines 4ah in the presence of a Keggin-type heteropolyacids series (H3PW12O40·13H2O; H4SiW12O40·13H2O; H4SiMo12O40·13H2O; and H3PMo12O40·13H2O) as catalysts without solvent and under microwave irradiation. We found that the use of H3PW12O40·13H2O acid coupled to microwave irradiation allowed obtaining a high-yielding reaction with a short time. The compound structures were established by 1H-NMR and 13C-NMR. The antibacterial and antifungal activities of the synthesized compounds exhibited an inhibition of the growth of bacteria and fungi. Full article
(This article belongs to the Special Issue Chemical Transformation of Renewable Material for Green Chemistry)
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Graphical abstract

Open AccessArticle Bioremediation of Synthetic and Industrial Effluents by Aspergillus niger Isolated from Contaminated Soil Following a Sequential Strategy
Molecules 2017, 22(12), 2244; https://doi.org/10.3390/molecules22122244
Received: 19 November 2017 / Revised: 14 December 2017 / Accepted: 14 December 2017 / Published: 16 December 2017
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Abstract
The present study aimed to assess and compare the ability to remediate synthetic textile and industrial wastewaters by Fenton treatment, a biological system and sequential treatments using Aspergillus niger (A. niger). All studied treatments were found to be effective in decolorization
[...] Read more.
The present study aimed to assess and compare the ability to remediate synthetic textile and industrial wastewaters by Fenton treatment, a biological system and sequential treatments using Aspergillus niger (A. niger). All studied treatments were found to be effective in decolorization of the effluents under study. Fenton treatment followed by A. niger showed excellent potential for the maximum decolorization of the synthetic and industrial effluents under study. The effectiveness of sequential treatment was evaluated by water quality parameters such as total organic carbon (TOC), Biological Oxygen Demand (BOD5) and Chemical Oxygen Demand (COD) before and after each treatment. The results indicated that A. niger is an effective candidate for detoxification of textile wastewaters. Full article
(This article belongs to the Special Issue Chemical Transformation of Renewable Material for Green Chemistry)
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Open AccessArticle Heterogenization of Ketone Catalyst for Epoxidation by Low Pressure Plasma Fluorination of Silica Gel Supports
Molecules 2017, 22(12), 2099; https://doi.org/10.3390/molecules22122099
Received: 1 November 2017 / Revised: 22 November 2017 / Accepted: 27 November 2017 / Published: 30 November 2017
PDF Full-text (20069 KB) | HTML Full-text | XML Full-text | Supplementary Files
Abstract
Low pressure plasma was used for preparing heterogeneous organocatalysts 2-(A)-(C) suitable for dioxirane-mediated epoxidations. Heterogenization was accomplished by adsorption of the methyl perfluoroheptyl ketone (2) on fluorinated supports (A)-(C) deriving from the
[...] Read more.
Low pressure plasma was used for preparing heterogeneous organocatalysts 2-(A)-(C) suitable for dioxirane-mediated epoxidations. Heterogenization was accomplished by adsorption of the methyl perfluoroheptyl ketone (2) on fluorinated supports (A)-(C) deriving from the treatment of commercial C8-silica gel in low pressure plasma fed with fluorocarbons. Catalyst 2-(C) proved to be the most efficient one, promoting epoxidation of an array of alkenes, including unsaturated fatty esters like methyl oleate (10) and the triglyceride soybean oil (11), with the cheap potassium peroxymonosulfate KHSO5 (caroate) as a green oxidant. Notably, the perfluorinated matrix gives rise to the activation of caroate, generating singlet oxygen. Materials were characterized by infrared Attenuated Total Reflectance spectroscopy (ATR-FTIR), X-ray Photoelectron Spectroscopy (XPS ) and Emission Scanning Electron Microscope (FESEM). Full article
(This article belongs to the Special Issue Chemical Transformation of Renewable Material for Green Chemistry)
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