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Exclusive Review Papers in Molecular Liquids

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

Deadline for manuscript submissions: closed (28 February 2023) | Viewed by 19228

Special Issue Editors


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Guest Editor
CICECO - Aveiro Institute of Materials, Chemistry Department, University of Aveiro, Aveiro, Portugal
Interests: separation processes; ionic liquids; deep eutectic solvents; (bio)pharmaceuticals; biomarkers; purification; stability
Special Issues, Collections and Topics in MDPI journals

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Guest Editor
Department of Chemistry and ICCRAM, University of Burgos, 09001 Burgos, Spain
Interests: multiscale materials modeling; thermodynamics; in silico toxicology; safe and sustainable by design; deep eutectic solvents; CO2 capture; nanomaterials; phase equilibrium; physical chemistry
Special Issues, Collections and Topics in MDPI journals

Special Issue Information

Dear Colleagues,

This Special Issue aims to collect high-quality review papers in the research field of molecular liquids, for which the Editorial Board members of the journal Molecules, Section “Molecular Liquids”, and other researchers working in the field are invited to contribute.

This Special Issue is designed to gather review papers that will improve the knowledge of simple or mixtures of liquids, comprising molecular and/or ionic fluids, such as water and aqueous solutions; molecular organic liquids; polymers and biopolymers; molten salts and ionic liquids; deep eutectic solvents and eutectic mixtures; surfactant and colloidal solutions; thermotropic and lyotropic liquid crystals; supercritical fluids; bio-based solvents. Reviews should be based on available information, from fundamental to applied research, while providing a critical view and future perspectives in the field.

Given the relevance of the present research on molecular liquids, and being that this is a field under continuous development, it is our great pleasure to invite the submission of review articles to the Special Issue entitled “Exclusive Review Papers in Molecular Liquids”.

Prof. Dr. Mara G. Freire
Prof. Dr. Santiago Aparicio
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 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

  • Molecular liquids
  • Reviews
  • Neoteric solvents
  • Molecular fluids
  • Liquid crystals
  • Surfactant and colloidal solutions

Published Papers (4 papers)

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Review

24 pages, 4705 KiB  
Review
The Role Played by Ionic Liquids in Carbohydrates Conversion into 5-Hydroxymethylfurfural: A Recent Overview
by Salvatore Marullo and Francesca D’Anna
Molecules 2022, 27(7), 2210; https://doi.org/10.3390/molecules27072210 - 29 Mar 2022
Cited by 3 | Viewed by 2539
Abstract
Obtaining industrially relevant products from abundant, cheap, renewable, and low-impacting sources such as lignocellulosic biomass, is a key step in reducing consumption of raw fossil materials and, consequently, the environmental footprint of such processes. In this regard, a molecule that is similar to [...] Read more.
Obtaining industrially relevant products from abundant, cheap, renewable, and low-impacting sources such as lignocellulosic biomass, is a key step in reducing consumption of raw fossil materials and, consequently, the environmental footprint of such processes. In this regard, a molecule that is similar to 5-hydroxymethylfurfural (5-HMF) plays a pivotal role, since it can be produced from lignocellulosic biomass and gives synthetic access to a broad range of industrially important products and polymers. Recently, ionic liquids (ILs) have emerged as suitable solvents for the conversion of biomass and carbohydrates into 5-HMF. Herein, we provide a bird’s-eye view on recent achievements about the use of ILs for the obtainment of 5-HMF, covering works that were published over the last five years. In particular, we first examine reactions involving homogeneous catalysis as well as task-specific ionic liquids. Then, an overview of the literature addressing the use of heterogeneous catalysts, including enzymes, is presented. Whenever possible, the role of ILs and catalysts driving the formation of 5-HMF is discussed, also comparing with the same reactions that are performed in conventional solvents. Full article
(This article belongs to the Special Issue Exclusive Review Papers in Molecular Liquids)
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21 pages, 2628 KiB  
Review
Recent Advances in the Synthesis of Inorganic Materials Using Environmentally Friendly Media
by Lorenzo Gontrani, Pietro Tagliatesta, Domenica Tommasa Donia, Elvira Maria Bauer, Matteo Bonomo and Marilena Carbone
Molecules 2022, 27(7), 2045; https://doi.org/10.3390/molecules27072045 - 22 Mar 2022
Cited by 6 | Viewed by 3536
Abstract
Deep Eutectic Solvents have gained a lot of attention in the last few years because of their vast applicability in a large number of technological processes, the simplicity of their preparation and their high biocompatibility and harmlessness. One of the fields where DES [...] Read more.
Deep Eutectic Solvents have gained a lot of attention in the last few years because of their vast applicability in a large number of technological processes, the simplicity of their preparation and their high biocompatibility and harmlessness. One of the fields where DES prove to be particularly valuable is the synthesis and modification of inorganic materials—in particular, nanoparticles. In this field, the inherent structural inhomogeneity of DES results in a marked templating effect, which has led to an increasing number of studies focusing on exploiting these new reaction media to prepare nanomaterials. This review aims to provide a summary of the numerous and most recent achievements made in this area, reporting several examples of the newest mixtures obtained by mixing molecules originating from natural feedstocks, as well as linking them to the more consolidated methods that use “classical” DES, such as reline. Full article
(This article belongs to the Special Issue Exclusive Review Papers in Molecular Liquids)
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46 pages, 5684 KiB  
Review
Thermoresponsive Ionic Liquid/Water Mixtures: From Nanostructuring to Phase Separation
by Nancy C. Forero-Martinez, Robinson Cortes-Huerto, Antonio Benedetto and Pietro Ballone
Molecules 2022, 27(5), 1647; https://doi.org/10.3390/molecules27051647 - 02 Mar 2022
Cited by 15 | Viewed by 3945
Abstract
The thermodynamics, structures, and applications of thermoresponsive systems, consisting primarily of water solutions of organic salts, are reviewed. The focus is on organic salts of low melting temperatures, belonging to the ionic liquid (IL) family. The thermo-responsiveness is represented by a temperature driven [...] Read more.
The thermodynamics, structures, and applications of thermoresponsive systems, consisting primarily of water solutions of organic salts, are reviewed. The focus is on organic salts of low melting temperatures, belonging to the ionic liquid (IL) family. The thermo-responsiveness is represented by a temperature driven transition between a homogeneous liquid state and a biphasic state, comprising an IL-rich phase and a solvent-rich phase, divided by a relatively sharp interface. Demixing occurs either with decreasing temperatures, developing from an upper critical solution temperature (UCST), or, less often, with increasing temperatures, arising from a lower critical solution temperature (LCST). In the former case, the enthalpy and entropy of mixing are both positive, and enthalpy prevails at low T. In the latter case, the enthalpy and entropy of mixing are both negative, and entropy drives the demixing with increasing T. Experiments and computer simulations highlight the contiguity of these phase separations with the nanoscale inhomogeneity (nanostructuring), displayed by several ILs and IL solutions. Current applications in extraction, separation, and catalysis are briefly reviewed. Moreover, future applications in forward osmosis desalination, low-enthalpy thermal storage, and water harvesting from the atmosphere are discussed in more detail. Full article
(This article belongs to the Special Issue Exclusive Review Papers in Molecular Liquids)
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37 pages, 3712 KiB  
Review
Revisiting the Physicochemical Properties and Applications of Deep Eutectic Solvents
by Sushma P. Ijardar, Vickramjeet Singh and Ramesh L. Gardas
Molecules 2022, 27(4), 1368; https://doi.org/10.3390/molecules27041368 - 17 Feb 2022
Cited by 74 | Viewed by 7035
Abstract
Recently, deep eutectic solvent (DES) or ionic liquid (IL) analogues have been considered as the newest green solvent, demonstrating the potential to replace harsh volatile organic solvents. DESs are mainly a combination of two compounds: hydrogen bond acceptor (HBA) and hydrogen bond donor [...] Read more.
Recently, deep eutectic solvent (DES) or ionic liquid (IL) analogues have been considered as the newest green solvent, demonstrating the potential to replace harsh volatile organic solvents. DESs are mainly a combination of two compounds: hydrogen bond acceptor (HBA) and hydrogen bond donor (HBD), which have the ability to interact through extensive hydrogen bonds. A thorough understanding of their physicochemical properties is essential, given their successful applications on an industrial scale. The appropriate blend of HBA to HBD can easily fine-tune DES properties for desired applications. In this context, we have reviewed the basic information related to DESs, the two most studied physicochemical properties (density and viscosity), and their performance as a solvent in (i) drug delivery and (ii) extraction of biomolecules. A broader approach of various factors affecting their performance has been considered, giving a detailed picture of the current status of DESs in research and development. Full article
(This article belongs to the Special Issue Exclusive Review Papers in Molecular Liquids)
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