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Special Issue "Review Papers in Green Chemistry"

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

Deadline for manuscript submissions: 30 September 2021.

Special Issue Editors

Dr. Matteo Guidotti
E-Mail Website
Guest Editor
CNR - Institute of Molecular Sciences and Technologies, via C. Golgi 19, Milano, Italy
Interests: sustainable oxidation; heterogeneous catalysis; degradation of toxic chemicals; liquid-phase selective oxidation; alternative oxidants; porous materials; molecular sieves; clays; bifunctional catalysis
Special Issues and Collections in MDPI journals
Dr. Raquel Soengas
E-Mail Website
Guest Editor
Department of Organic and Inorganic Chemistry, University of Oviedo, Julián Clavería, 33006 Oviedo, Spain
Interests: green organometallic chemistry; carbohydrate chemistry; natural products chemistry; NMR spectroscopy
Special Issues and Collections in MDPI journals

Special Issue Information

Dear Colleagues,

The journal Molecules intends to set up a Special Issue on “Review Papers in Green Chemistry” dedicated to all aspects of Green Chemistry. As the editors of the Special Issue, we are welcoming proposals for review articles covering all fundamental and application aspects in the field of Green Chemistry (theory, techniques, applications, instrumentation, up-to-date achievements, future perspectives, etc.).

Distinguished researchers from all over the world are invited to contribute to this issue. In order to avoid overlapping of topics, potential contributors/invited authors are kindly requested to submit the editors a tentative article title and 1–2-page description/table of contents for pre-evaluation.

Dr. Raquel Soengas
Dr. Matteo Guidotti
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 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 2000 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.

Published Papers (5 papers)

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Review

Review
Metal Nanoparticles as Sustainable Tools for C–N Bond Formation via C–H Activation
Molecules 2021, 26(13), 4106; https://doi.org/10.3390/molecules26134106 - 05 Jul 2021
Viewed by 546
Abstract
The design of highly active metal nanoparticles to be employed as efficient heterogeneous catalysts is a key tool for the construction of complex organic molecules and the minimization of their environmental costs. The formation of novel C–N bonds via C–H activation is an [...] Read more.
The design of highly active metal nanoparticles to be employed as efficient heterogeneous catalysts is a key tool for the construction of complex organic molecules and the minimization of their environmental costs. The formation of novel C–N bonds via C–H activation is an effective atom-economical strategy to access high value materials in pharmaceuticals, polymers, and natural product production. In this contribution, the literature of the last ten years on the use of metal nanoparticles in the processes involving direct C–N bond formation will be discussed. Where possible, a discussion on the role and influence of the support used for the immobilization and/or the metal chosen is reported. Particular attention was given to the description of the experiments performed to elucidate the active mechanism. Full article
(This article belongs to the Special Issue Review Papers in Green Chemistry)
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Review
Seaweed Polysaccharide Based Products and Materials: An Assessment on Their Production from a Sustainability Point of View
Molecules 2021, 26(9), 2608; https://doi.org/10.3390/molecules26092608 - 29 Apr 2021
Viewed by 635
Abstract
Among the various natural polymers, polysaccharides are one of the oldest biopolymers present on the Earth. They play a very crucial role in the survival of both animals and plants. Due to the presence of hydroxyl functional groups in most of the polysaccharides, [...] Read more.
Among the various natural polymers, polysaccharides are one of the oldest biopolymers present on the Earth. They play a very crucial role in the survival of both animals and plants. Due to the presence of hydroxyl functional groups in most of the polysaccharides, it is easy to prepare their chemical derivatives. Several polysaccharide derivatives are widely used in a number of industrial applications. The polysaccharides such as cellulose, starch, chitosan, etc., have several applications but due to some distinguished characteristic properties, seaweed polysaccharides are preferred in a number of applications. This review covers published literature on the seaweed polysaccharides, their origin, and extraction from seaweeds, application, and chemical modification. Derivatization of the polysaccharides to impart new functionalities by chemical modification such as esterification, amidation, amination, C-N bond formation, sulphation, acetylation, phosphorylation, and graft copolymerization is discussed. The suitability of extraction of seaweed polysaccharides such as agar, carrageenan, and alginate using ionic solvent systems from a sustainability point of view and future prospects for efficient extraction and functionalization of seaweed polysaccharides is also included in this review article. Full article
(This article belongs to the Special Issue Review Papers in Green Chemistry)
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Review
The Role of Hydrogen Bond Donor on the Extraction of Phenolic Compounds from Natural Matrices Using Deep Eutectic Systems
Molecules 2021, 26(8), 2336; https://doi.org/10.3390/molecules26082336 - 17 Apr 2021
Cited by 1 | Viewed by 621
Abstract
Recently, deep eutectic systems (DESs) as extraction techniques for bioactive compounds have surfaced as a greener alternative to common organic solvents. In order to study the effect of these systems on the extraction of phenolic compounds from different natural sources, a comprehensive review [...] Read more.
Recently, deep eutectic systems (DESs) as extraction techniques for bioactive compounds have surfaced as a greener alternative to common organic solvents. In order to study the effect of these systems on the extraction of phenolic compounds from different natural sources, a comprehensive review of the state of the art was carried out. In a first approach, the addition of water to these systems and its effect on DES physicochemical properties such as polarity, viscosity, and acidity was investigated. This review studied the effect of the hydrogen bond donor (HBD) on the nature of the extracted phenolics. The effects of the nature of the HBD, namely carbon chain length as well as the number of hydroxyl, methyl, and carbonyl groups, have shown to play a critical role in the extraction of different phenolic compounds. This review highlights the differences between DES systems and systematizes the results published in the literature, so that a more comprehensive evaluation of the systems can be carried out before any experimental trial. Full article
(This article belongs to the Special Issue Review Papers in Green Chemistry)
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Review
Overcoming the Biological Contamination in Microalgae and Cyanobacteria Mass Cultivations for Photosynthetic Biofuel Production
Molecules 2020, 25(22), 5220; https://doi.org/10.3390/molecules25225220 - 10 Nov 2020
Cited by 4 | Viewed by 725
Abstract
Microalgae and cyanobacteria have shown significant potential for the development of the next biofuels innovation because of their own characteristics as photosynthetic microorganisms. However, it is confronted with a lot of severe challenges on the economic scaling-up of the microalgae- and cyanobacteria-based biofuels [...] Read more.
Microalgae and cyanobacteria have shown significant potential for the development of the next biofuels innovation because of their own characteristics as photosynthetic microorganisms. However, it is confronted with a lot of severe challenges on the economic scaling-up of the microalgae- and cyanobacteria-based biofuels production. One of these major challenges is the lack of a reliable preventing and controlling culture system of biological contamination, which can attack the cell growth or product accumulation causing crashing effects. To increase the commercial viability of microalgae- and cyanobacteria-based biofuels production, overcoming the biological contaminations should be at the top of the priority list. Here, we highlight the importance of two categories of biological contaminations and their controlling strategies in the mass cultivations of microalgae and cyanobacteria, and outline the directions that should be exploited in the future. Full article
(This article belongs to the Special Issue Review Papers in Green Chemistry)
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Review
Chitosan: A Natural Biopolymer with a Wide and Varied Range of Applications
Molecules 2020, 25(17), 3981; https://doi.org/10.3390/molecules25173981 - 01 Sep 2020
Cited by 11 | Viewed by 1134
Abstract
Although chitin is of the most available biopolymers on Earth its uses and applications are limited due to its low solubility. The deacetylation of chitin leads to chitosan. This biopolymer, composed of randomly distributed β-(1-4)-linked D-units, has better physicochemical properties due to the [...] Read more.
Although chitin is of the most available biopolymers on Earth its uses and applications are limited due to its low solubility. The deacetylation of chitin leads to chitosan. This biopolymer, composed of randomly distributed β-(1-4)-linked D-units, has better physicochemical properties due to the facts that it is possible to dissolve this biopolymer under acidic conditions, it can adopt several conformations or structures and it can be functionalized with a wide range of functional groups to modulate its superficial composition to a specific application. Chitosan is considered a highly biocompatible biopolymer due to its biodegradability, bioadhesivity and bioactivity in such a way this biopolymer displays a wide range of applications. Thus, chitosan is a promising biopolymer for numerous applications in the biomedical field (skin, bone, tissue engineering, artificial kidneys, nerves, livers, wound healing). This biopolymer is also employed to trap both organic compounds and dyes or for the selective separation of binary mixtures. In addition, chitosan can also be used as catalyst or can be used as starting molecule to obtain high added value products. Considering these premises, this review is focused on the structure and modification of chitosan as well as its uses and applications. Full article
(This article belongs to the Special Issue Review Papers in Green Chemistry)
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