Molecules, Vol. 29, Pages 1349: Microwave-Assisted Grafting of Coal onto Nitrogen-Doped Carbon Dots with a High Quantum Yield and Enhanced Photoluminescence Properties
Wei The fluorescent nitrogen-doped carbon dots (N-CDs) were synthesized via a facile one-pot solvothermal process using coal (Jin 15 Anthracite and Shaerhu lignite) as raw materials and dimethyl formamide (DMF) as the solvent, employing a microwave pyrolysis method. This approach demonstrates remarkable efficacy in the development of nitrogen-doped carbon dots (N-CDs) with a high quantum yield (QY). The N-CDs prepared have strong photoluminescence properties. Moreover, the obtained N-CDs emit blue PL and are easily dispersed in polymethyl methacrylate (PMMA), preserving the inherent advantages of N-CDs and the PMMA mat...
Source: Molecules - March 18, 2024 Category: Chemistry Authors: Chong Shi Xian-Yong Wei Tags: Article Source Type: research

Molecules, Vol. 29, Pages 1348: The Removal of Arsenic and Its Inorganic Forms from Marine Algae & mdash;A Base for Inexpensive and Efficient Fertilizers
Molecules, Vol. 29, Pages 1348: The Removal of Arsenic and Its Inorganic Forms from Marine Algae—A Base for Inexpensive and Efficient Fertilizers Molecules doi: 10.3390/molecules29061348 Authors: Jarosław Ostrowski Alicja Drozd Rafał Olchowski Agnieszka Chałabis-Mazurek Andrzej Sienkiewicz Agnieszka Kierys Kinga Morlo Ryszard Dobrowolski Newly synthesized cerium oxide was successfully obtained by the hard templating route. The optimal As(III) and As(V) adsorption onto the studied adsorbent was reached for the initial pH of 4.0 and a contact time of 10 h. The highest static adsorption capa...
Source: Molecules - March 18, 2024 Category: Chemistry Authors: Jaros ław Ostrowski Alicja Drozd Rafa ł Olchowski Agnieszka Cha łabis-Mazurek Andrzej Sienkiewicz Agnieszka Kierys Kinga Morlo Ryszard Dobrowolski Tags: Article Source Type: research

Molecules, Vol. 29, Pages 1350: Novel Nanocomposites for Luminescent Thermometry with Two Different Modalities
Hemmer In this work, we successfully integrated fluorescent nanodiamonds (FNDs) and lanthanide ion-doped upconversion nanoparticles (UCNPs) in a nanocomposite structure for simultaneous optical temperature sensing. The effective integration of FND and UCNP shells was confirmed by employing high-resolution TEM imaging, X-ray diffraction, and dual-excitation optical spectroscopy. Furthermore, the synthesized ND@UCNP nanocomposites were tested by making simultaneous optical temperature measurements, and the detected temperatures showed excellent agreement within their sensitivity limit. The simultaneous measurement of te...
Source: Molecules - March 18, 2024 Category: Chemistry Authors: Masfer Alkahtani Yahya A. Alzahrani Abdulaziz Alromaeh Philip Hemmer Tags: Article Source Type: research

Molecules, Vol. 29, Pages 1351: Green Approach to Enhance the Recovery of Polyphenols from Blackcurrant and Bilberry Leaves: Evaluation of Microwave-Assisted and Pressurized Liquid Extraction
vić-Uzelac The aim of the present study was to evaluate microwave-assisted (MAE) and pressurized liquid extraction (PLE) for the recovery of polyphenols from blackcurrant and bilberry leaves and the preservation of their antioxidant activity. The extractions were carried out varying the solvent/solid (SS) ratio, temperature and time. During MAE, increasing the SS ratio increased the polyphenol concentration in the extracts from blackcurrant and bilberry leaves, while increasing the temperature had a positive effect only on bilberry polyphenols. During PLE, only a temperature increase was a determining factor for the i...
Source: Molecules - March 18, 2024 Category: Chemistry Authors: Elez Garofuli ć Repaji ć Cegledi Dobroslavi ć Dobrin čić Zori ć Pedisi ć Frankovi ć Bre ški Dragovi ć-Uzelac Tags: Article Source Type: research

Molecules, Vol. 29, Pages 1352: Rational Design of Magnetic Nanoparticles as T1 & ndash;T2 Dual-Mode MRI Contrast Agents
Molecules, Vol. 29, Pages 1352: Rational Design of Magnetic Nanoparticles as T1–T2 Dual-Mode MRI Contrast Agents Molecules doi: 10.3390/molecules29061352 Authors: Carlos F. G. C. Geraldes Magnetic nanoparticles (MNPs), either paramagnetic or superparamagnetic depending on their composition and size, have been thoroughly studied as magnetic resonance imaging (MRI) contrast agents using in vitro and in vivo biomedical preclinical studies, while some are clinically used. Their magnetic properties responsible in some cases for high magnetization values, together with large surface area-to-volume ratios and th...
Source: Molecules - March 18, 2024 Category: Chemistry Authors: Carlos F. G. C. Geraldes Tags: Review Source Type: research

Molecules, Vol. 29, Pages 1340: Effects of Ti3C2Tx MXene Addition to a Co Complex/Ionic Liquid-Based Electrolyte on the Photovoltaic Performance of Solar Cells
n Soo Han Redox mediators comprising I−, Co3+, and Ti3C2Tx MXene were applied to dye-sensitized solar cells (DSCs). In the as-prepared DSCs (I-DSCs), wherein hole conduction occurred via the redox reaction of I−/I3− ions, the power conversion efficiency (PCE) was not altered by the addition of Ti3C2Tx MXene. The I-DSCs were exposed to light to produce Co2+/Co3+-based cells (Co-DSCs), wherein the holes were transferred via the redox reaction of Co2+/Co3+ ions. A PCE of 9.01% was achieved in a Co-DSC with Ti3C2Tx MXene (Ti3C2Tx-Co-DSC), which indicated an improvement from the PCE...
Source: Molecules - March 18, 2024 Category: Chemistry Authors: Ju Hee Gu Dongho Park Kyung-Hye Jung Byung Chul Lee Yoon Soo Han Tags: Article Source Type: research

Molecules, Vol. 29, Pages 1341: Synthesis and Spectroscopic Characterization of Selected Water-Soluble Ligands Based on 1,10-Phenanthroline Core
We present the selective conversion of a hydroxydialdehyde in the form of 10-hydroxybenzo[h]quinoline-7,9-dicarbaldehyde into its derivative, unique hydroxydicarboxylic acid, by an oxidation procedure, giving 10-hydroxybenzo[h]quinoline-7,9-dicarboxylic acid. A similar procedure resulted in the formation of 9-methyl-1,10-phenanthroline-2-carboxylic acid by oxidation of commercially available neocuproine. An alternative method of obtaining 1,10-phenanthroline derivatives possessing carboxylic acid group can be based on the hydrolysis of ester or nitrile groups; however, this synthesis leads to unexpected products. Moreover,...
Source: Molecules - March 18, 2024 Category: Chemistry Authors: Jacek E. Nycz Natalia Martsinovich Jakub Wantulok Tieqiao Chen Maria Ksi ążek Joachim Kusz Tags: Article Source Type: research

Molecules, Vol. 29, Pages 1343: Chemical Composition Variation in Essential Oil and Their Correlation with Climate Factors in Chinese Prickly Ash Peels (Zanthoxylum armatum DC.) from Different Habitats
This study contributes to the identification of Z. armatum quality, promotes the accumulation of theories on the effects of climatic factors on essential oils, and enriches the site selection and breeding of Z. armatum under similar climatic conditions. (Source: Molecules)
Source: Molecules - March 18, 2024 Category: Chemistry Authors: Qianqian Qian Zhihang Zhuo Yaqin Peng Danping Xu Tags: Article Source Type: research

Molecules, Vol. 29, Pages 1342: Controllable La Deficiency Engineering within Perovskite Oxides for Enhanced Overall Water Splitting
In this study, hollow-nanotube-structure LaxCo0.4Fe0.6O3−δ (x = 1.0, 0.9, and 0.8) perovskites with superior HER/OER activity were synthesized on nickel-iron alloy foam (denoted LaxCoFe/NFF) using hydrothermal with a subsequent calcination strategy. Among them, La0.9CoFe/NFF not only exhibited extraordinary HER electrocatalytic performance (160.5 mV@10 mA cm−2 and 241.0 mV@100 mA cm−2) and stability (20 h@10 mA cm−2), but also displayed significant OER electrocatalytic activity (234.7 mV@10 mA cm−2 and 296.1 mV@100 mA cm−2) an...
Source: Molecules - March 18, 2024 Category: Chemistry Authors: Xiaohu Xu Kaiwei Guo Xinyue Yu Tags: Article Source Type: research

Molecules, Vol. 29, Pages 1344: DFT Studies of Dimethylaminophenyl-Substituted Phthalocyanine and Its Silver Complexes
a The dimethylaminophenyl-substituted silver phthalocyanine [dmaphPcAg] can be used as a UV-vis photoinitiator for in situ preparation of a silver/polymer nanocomposite. To verify early steps of the supposed mechanism of radical polymerization, we performed quantum chemical calculations of m[dmaphPcAg]q complexes with charges q = +1 to −2 in the two lowest spin states m, of a free ligand and its dehydrogenated/deprotonated products m[dmaphPcHn]q, n = 2 to 0, q = 0, −1 or −2, in the lowest spin states m. The calculated electronic structures and electron transitions of all the op...
Source: Molecules - March 18, 2024 Category: Chemistry Authors: Martin Breza Tags: Article Source Type: research

Molecules, Vol. 29, Pages 1345: Turn Waste Golden Tide into Treasure: Bio-Adsorbent Synthesis for CO2 Capture with K2FeO4 as Catalytic Oxidative Activator
Ning Ai Converting Sargassum horneri (SH)—a harmful marine stranding that can cause golden tide—to highly porous bio-adsorbent material (via one-step catalytic oxidative pyrolysis with K2FeO4) can be a strategically useful method for obtaining low-cost materials suitable for CO2 capture. In this manuscript, the behavior of different mass ratios of K2FeO4/SH precursor acting on the surface physicochemical properties of carbon materials are reported. The results suggest that specific surface area and total pore volume first increased to the mass ratio of K2FeO4/carbon precursor, then decreased...
Source: Molecules - March 18, 2024 Category: Chemistry Authors: Huijuan Ying Chenglin Jia Ganning Zeng Ning Ai Tags: Article Source Type: research

Molecules, Vol. 29, Pages 1346: Comprehensive Review on Chiral Stationary Phases in Single-Column Simultaneous Chiral & ndash;Achiral HPLC Separation Methods
This article delves into the diverse applications of CSPs, encompassing various chromatographic modes such as normal phase (NP), reverse phase (RP), and polar organic (PO). This review critically discusses method development, emphasizing the additional chemoselective separation mechanisms of CSPs. It also explores possibilities for method optimization and development, concluding with future perspectives on this evolving field. Despite the inherent challenges in understanding the retention mechanisms involved in chemoselective separations, this review highlights promising trends and anticipates a growing number of simultane...
Source: Molecules - March 18, 2024 Category: Chemistry Authors: Lajos Attila Papp Zolt án István Szabó Gabriel Hancu L énárd Farczádi Eleonora Mircia Tags: Review Source Type: research

Molecules, Vol. 29, Pages 1347: Study of the Structure and Bioactivity of Polysaccharides from Different Parts of Stemona tuberosa Lour
gliang Yao Wen-Hua Chen The polysaccharides from Stemona tuberosa Lour, a kind of plant used in Chinese herbal medicine, have various pharmacological activities, such as anti-inflammatory and antioxidant properties. However, the effects of the extraction methods and the activity of polysaccharides from different parts are still unknown. Therefore, this study aimed to evaluate the effects of different extraction methods on the yields, chemical compositions, and bioactivity of polysaccharides extracted from different parts of Stemona tuberosa Lour. Six polysaccharides were extracted from the leaves, roots, and stems of...
Source: Molecules - March 18, 2024 Category: Chemistry Authors: Xiang Qiu Yanghui Ou Shengjia Lu Yibin Liang Yali Zhang Mengjie Li Gang Li Hongwei Ma Yanting Wu Zhaoyu He Zhensheng Zhang Hongliang Yao Wen-Hua Chen Tags: Article Source Type: research

Molecules, Vol. 29, Pages 1336: Mass-Spectrometry-Based Research of Cosmetic Ingredients
a Elena Sandu Cosmetic products are chemical substances or mixtures used on the skin, hair, nails, teeth, and the mucous membranes of the oral cavity, whose use is intended to clean, protect, correct body odor, perfume, keep in good condition, or change appearance. The analysis of cosmetic ingredients is often challenging because of their huge complexity and their adulteration. Among various analytical tools, mass spectrometry (MS) has been largely used for compound detection, ingredient screening, quality control, detection of product authenticity, and health risk evaluation. This work is focused on the MS application...
Source: Molecules - March 17, 2024 Category: Chemistry Authors: Alina Florina Serb Marius Georgescu Robert Onulov Cristina Ramona Novaconi Eugen Sisu Alexandru Bolocan Raluca Elena Sandu Tags: Review Source Type: research

Molecules, Vol. 29, Pages 1337: Novel Meta-Diamide Compounds Containing Sulfide Derivatives Were Designed and Synthesized as Potential Pesticides
ha Zhou The meta-diamide (m-diamide) insecticide, Broflanilide, was characterized by its high efficiency, low toxicity and lack of cross-resistance with traditional GABA receptors. In accordance with the principles of drug molecular design, easily derivable sulfur with diverse bioactivities was introduced while leading with the parent Broflanilide. Twelve novel m-diamide target compounds containing sulfide derivatives were synthesized through exploration guided by the literature. Their structures were confirmed by melting points, 1H NMR, 13C NMR and HRMS. Insecticidal activity assessments revealed that most target comp...
Source: Molecules - March 17, 2024 Category: Chemistry Authors: Jingwen Wu Shuaihui Dang Yan Zhang Sha Zhou Tags: Article Source Type: research