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30th Anniversary of Molecules—Recent Advances in Applied Chemistry
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30th Anniversary of Molecules—Recent Advances in Applied Chemistry

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

Deadline for manuscript submissions: 31 July 2025 | Viewed by 1936

Special Issue Editors

Prof. Dr. Bhanu P. S. Chauhan

E-Mail Website
Guest Editor
Engineered Nanomaterials Laboratory, Department of Chemistry, William Paterson University, 300, Pompton Road, Wayne, NJ 07470, USA
Interests: nanocatalysis; novel metal nanoparticles; macromolecules; polysiloxane based materials; polysilanes; metallopolysilicones; siloxane dendrimers; polymers for drug delivery; nanochemistry; hybridpolymers; green catalysis
Special Issues, Collections and Topics in MDPI journals
Prof. Dr. Shijun Liao

E-Mail Website
Guest Editor
The Key Laboratory of Fuel Cell Technology of Guangdong Province, School of Chemistry and Chemical Engineering, South China University of Technology, Guangzhou 510641, China
Interests: sub-exchange membrane fuel cell technology; electrocatalysis; lithium-air battery; lithium-ion battery materials; other batteries: potassium ion batteries, etc.
Special Issues, Collections and Topics in MDPI journals

Special Issue Information

Dear Colleagues,

In 2025, we will be celebrating the 30th anniversary of our journal, Molecules. To date, the journal has published more than 50,000 papers. Molecules has carved out a notable space in the literature on chemistry, with an Impact Factor of 4.2 (2023) and a 5-Year Impact Factor of 4.6 (2023). Our sincerest thanks go to our readers, innumerable authors, anonymous peer reviewers, editors, and all the people working for the journal in some capacity. Without your help, we would never have achieved this.

To mark this important milestone, a Special Issue entitled “Recent Advances in Applied Chemistry” is being launched. This Special Issue welcomes communications, full papers, and high-quality review papers in the fields of applied chemistry. We kindly invite and encourage all research groups covering various applied chemistry areas to make contributions.

Prof. Dr. Bhanu P. S. Chauhan
Prof. Dr. Shijun Liao
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

  • applied chemistry
  • new molecules and natural materials
  • analytical methods and techniques
  • electrochemistry and energy
  • biodegradable materials and medicines
  • environment and green chemistry
  • theoretical chemistry

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Published Papers (5 papers)

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Research

18 pages, 1620 KiB  
Article
Application of an Electronic Nose to the Prediction of Odorant Series in Wines Obtained with Saccharomyces or Non-Saccharomyces Yeast Strains
by Raquel Muñoz-Castells, Margherita Modesti, Jaime Moreno-García, Alexandro Catini, Rosamaria Capuano, Corrado Di Natale, Andrea Bellincontro and Juan Moreno
Molecules 2025, 30(7), 1584; https://doi.org/10.3390/molecules30071584 - 2 Apr 2025
Viewed by 377
Abstract
Electronic noses (E-noses) have become powerful tools for the rapid and cost-effective differentiation of wines, providing valuable information for the comprehensive evaluation of aroma patterns. However, they need to be trained and validated using classical analytical techniques, such as gas chromatography coupled with [...] Read more.
Electronic noses (E-noses) have become powerful tools for the rapid and cost-effective differentiation of wines, providing valuable information for the comprehensive evaluation of aroma patterns. However, they need to be trained and validated using classical analytical techniques, such as gas chromatography coupled with mass spectrometry, which accurately identify the volatile compounds in wine. In this study, five low-ethanol wines with distinctive sensory profiles—produced using Saccharomyces and non-Saccharomyces yeasts and tailored to modern consumer preferences—were analyzed to validate the E-nose. A total of 57 volatile compounds were quantified, 27 of which had an Odor Activity Value (OAV) over 0.2. The content in volatiles, grouped into 11 odorant series according to their odor descriptors, along with the data provided by 12 E-nose sensors, underwent advanced statistical treatments to identify relationships between both data matrices. Partial least squares discriminant analysis (PLS-DA) applied to the data from the 12 E-nose sensors revealed well-defined clustering patterns and produced a model that explained approximately 92% of the observed variability. In addition, a principal component regression (PCR) model was developed to assess the ability of the E-nose to non-destructively predict odorant series in wine. The synergy between the volatile compound profiles and the pattern recognition capability of the E-nose, as captured by PLS-DA, enables a detailed characterization of wine aromas. In addition, predictive models that integrate data from gas chromatography, flame ionization detection, and mass spectrometry (GC-FID/GC-MSD) with the electronic nose demonstrating a promising approach for a rapid and accurate odor series prediction, thereby increasing the efficiency of wine aroma analysis. Full article
(This article belongs to the Special Issue 30th Anniversary of Molecules—Recent Advances in Applied Chemistry)
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17 pages, 2341 KiB  
Article
Excess Properties, FT-IR Spectral Analysis, and CO2 Absorption Performance of Monoethanolamine with Diethylene Glycol Monoethyl Ether or Methyldiethanolamine Binary Solutions
by Maria Magdalena Naum, Mihaela Neagu and Vasile Dumitrescu
Molecules 2025, 30(7), 1523; https://doi.org/10.3390/molecules30071523 - 29 Mar 2025
Viewed by 257
Abstract
In this study, densities and viscosities of the binary solutions of monoethanolamine with diethylene glycol monoethyl ether or methyldiethanolamine were determined at 293.15, 298.15, and 303.15 K and p = 100.5 kPa. The experimental density data were tested with different equations as a [...] Read more.
In this study, densities and viscosities of the binary solutions of monoethanolamine with diethylene glycol monoethyl ether or methyldiethanolamine were determined at 293.15, 298.15, and 303.15 K and p = 100.5 kPa. The experimental density data were tested with different equations as a function of composition (Belda and Herraez equations) and as a function of temperature and composition (Emmerling et al. and Gonzalez-Olmos–Iglesias equations). The results show that the Herraez and Emmerling et al. equations best correlate the experimental data. The experimental values of viscosity were tested with different models based on one, two, three, or four parameters. The values of excess molar volume (VE), viscosity deviation (Δη), and excess Gibbs energy (ΔG*E) were calculated from the experimental values and were fitted to the polynomial equations. The values of the excess molar volume are negative for both systems, while positive values were obtained for the viscosity deviation and excess Gibbs activation energy. The values of thermodynamic functions of activation of viscous flow were determined and discussed. The Fourier transform infrared spectroscopy (FT-IR) spectra of the binary solutions analyzed in this study enabled the understanding of the interactions among the molecules in these solutions. In addition, the CO2 absorption capacity of the binary solutions of monoethanolamine with diethylene glycol monoethyl ether or methyldiethanolamine was determined experimentally. Full article
(This article belongs to the Special Issue 30th Anniversary of Molecules—Recent Advances in Applied Chemistry)
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15 pages, 4886 KiB  
Article
Manganese Phthalocyanine-Based Magnetic Core–Shell Composites with Peroxidase Mimetic Activity for Colorimetric Detection of Ascorbic Acid and Glutathione
by Junchao Qi, Long Tian, Yudong Pang and Fengshou Wu
Molecules 2025, 30(7), 1484; https://doi.org/10.3390/molecules30071484 - 27 Mar 2025
Viewed by 282
Abstract
Ascorbic acid (AA) and glutathione (GSH) play a pivotal role in health assessment, drug development, and quality control of nutritional supplements. The development of a new and efficient method for their detection is highly desired. In this work, we fabricated magnetic core–shell nanocomposites [...] Read more.
Ascorbic acid (AA) and glutathione (GSH) play a pivotal role in health assessment, drug development, and quality control of nutritional supplements. The development of a new and efficient method for their detection is highly desired. In this work, we fabricated magnetic core–shell nanocomposites (Fe3O4@MnPc-NDs) by a one-pot hydrothermal method with citric acid and manganese tetraamino phthalocyanine (MnTAPc) as precursors. Fe3O4@MnPc-NDs exhibited enhanced peroxidase activity compared to bare Fe3O4 nanoparticles, enabling catalytic oxidation of colorless 3,3′,5,5′-tetramethylbenzidine (TMB) to blue ox-TMB in the presence of H2O2. Leveraging the antioxidant properties of AA/GSH to reduce ox-TMB, a colorimetric assay achieved a low detection limit of 0.161 μM for AA and 0.188 μM for GSH with broad linear ranges. Moreover, this method displayed high specificity against 12 interfering substances and excellent recyclability (>90% activity after five cycles). Finally, the Fe3O4@MnPc-NDs could act as an efficient colorimetric sensor for accurately detecting AA in genuine VC tablets and GSH in whitening serums with high accuracy. Therefore, Fe3O4@MnPc-NDs exhibited great potential in bioassay applications, benefiting from their outstanding sensitivity and high recycling rate. Full article
(This article belongs to the Special Issue 30th Anniversary of Molecules—Recent Advances in Applied Chemistry)
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13 pages, 11463 KiB  
Article
A Facile One-Pot Preparation and Catalytic Application of Tunable Silica-Coated Aqueous Gold Nanoparticles
by Elijah Cook, Kelly Moran, Qiaxian R. Johnson, Asmaa Lakhal and Bhanu P. S. Chauhan
Molecules 2025, 30(6), 1355; https://doi.org/10.3390/molecules30061355 - 18 Mar 2025
Viewed by 315
Abstract
It is known that designer polymers can be used for the synthesis and stabilization of metallic nanoparticle systems, providing new, tailorable properties. In this work, we demonstrate the trifold utility of a designer polymer, trimethoxysilylpropyl-(polyethylenimine) (TMSP-PEI), providing reduction, stabilization, and protection in a [...] Read more.
It is known that designer polymers can be used for the synthesis and stabilization of metallic nanoparticle systems, providing new, tailorable properties. In this work, we demonstrate the trifold utility of a designer polymer, trimethoxysilylpropyl-(polyethylenimine) (TMSP-PEI), providing reduction, stabilization, and protection in a single step. Our facile and unique synthesis affords gold nanoparticles with varying sizes and morphologies in a range of solvents without the need for additional reducing agents. The use of this substituted polymer was manipulated in terms of the metal-to-ligand ratio to induce changes in the nanoparticle nucleation and growth. Upon further experimental analysis, it was discovered that adjustments to not only the metal–ligand ratio but also the solvent environment produced nanoparticles with different shape and size distributions. In addition, the synthesized gold nanoparticles were investigated for their catalytic ability to reduce Eosin Y in the presence of sodium borohydride without degradation. Full article
(This article belongs to the Special Issue 30th Anniversary of Molecules—Recent Advances in Applied Chemistry)
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22 pages, 2991 KiB  
Article
Luminescent Manganese(II) Iminophosphorane Derivatives
by Domenico Piccolo, Jesús Castro, Daniele Rosa-Gastaldo and Marco Bortoluzzi
Molecules 2025, 30(6), 1319; https://doi.org/10.3390/molecules30061319 - 14 Mar 2025
Viewed by 419
Abstract
The reaction between the iminophosphorane ligand N-phenyl-1,1,1-triphenylphosphanimine (NPh=PPh3) and anhydrous manganese(II) halides allowed the isolation of complexes with the general formula [MnX2(NPh=PPh3)2] (X = Cl, Br, I). The compounds showed luminescence in the green [...] Read more.
The reaction between the iminophosphorane ligand N-phenyl-1,1,1-triphenylphosphanimine (NPh=PPh3) and anhydrous manganese(II) halides allowed the isolation of complexes with the general formula [MnX2(NPh=PPh3)2] (X = Cl, Br, I). The compounds showed luminescence in the green region attributed to the 4T1(4G)→6A1(6S) transition of the metal centre in the tetrahedral field, which was superimposed in the cases of X = Cl and X = Br on weak ligand-centred fluorescence. The emission and excitation spectra were compared with those of the free ligand and of the related zinc(II) bromo-complex. DFT calculations on the free ligand and on the manganese(II) bromo-complex helped to rationalise the experimental data. The protonation of NPh=PPh3 led to the formation of the iminium cation [NHPh=PPh3]+, which was used as a building block for the synthesis of organic–inorganic hybrids with the general formula [NHPh=PPh3]2[MnX4] (X = Cl, Br, I). The crystal structure of [NHPh=PPh3]2[MnBr4] was determined by means of X-ray diffraction. Green photoluminescence associated with the metal-centred transition was also observed for the organic–inorganic hybrids, with higher quantum yields with respect to the neutral [MnX2(NPh=PPh3)2] complexes. In the case of X = I, luminescence from the cation was superimposed on that from the tetraiodomanganate anion upon excitation of the compound with near–UV light. Full article
(This article belongs to the Special Issue 30th Anniversary of Molecules—Recent Advances in Applied Chemistry)
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