Article
Materials Science, Multidisciplinary
Emre Guzel, Diana-Paola Medina, Maria Medel, Mehmet Kandaz, Tomas Torres, M. Salome Rodriguez-Morgade
Summary: This study presents a method for preparing key synthetic intermediates of ABAB- and ABAC-phthalocyanines and other tetraazaporphyrin analogues, utilizing crossover cyclotetramerization and conversion of nitro groups to iodine substituents. The effectiveness of the method is based on two principles: the inability of trichloroisoindolenine derivative to self-condense and the easy functionalization of diiodo-tetraazaporphyrin through metal-catalyzed cross-coupling reactions.
JOURNAL OF MATERIALS CHEMISTRY C
(2021)
Article
Polymer Science
Viktoria Y. Melekhina, Anna V. Vlasova, Sergey O. Ilyin
Summary: The use of asphaltenes as UV stabilizing agents for polymers, such as polypropylene (PP), can effectively prevent the aging and deterioration of polymers under UV radiation. Adding asphaltenes to PP reduces the viscosity and strength of the initial material, but compensates for the deterioration in properties after UV aging. The optimal content of asphaltenes is 20%, which significantly suppresses UV destruction and best preserves the strength properties of PP.
Article
Chemistry, Inorganic & Nuclear
Nazli Farajzadeh, Nilgun Guler Kusculu, H. Yasemin Yenilmez, Dilek Bahar, Zehra Altuntas Bayir
Summary: This study reports the synthesis and biological properties of three novel axially disubstituted silicon phthalocyanines and their quaternized phthalocyanines. The compounds exhibited DNA cleavage activities, topoisomerase I inhibition activities, and showed cytotoxic and apoptotic effects on a human colon cancer cell line. These findings suggest the potential use of these compounds in cancer therapy.
DALTON TRANSACTIONS
(2022)
Article
Nanoscience & Nanotechnology
Bahareh Marzban, Lukas Seidel, Teren Liu, Kui Wu, Vivien Kiyek, Marvin Hartwig Zoellner, Zoran Ikonic, Joerg Schulze, Detlev Grutzmacher, Giovanni Capellini, Michael Oehme, Jeremy Witzens, Dan Buca
Summary: SiGeSn materials show great potential for mid-infrared applications. In this study, an electrically pumped GeSn microring laser based on SiGeSn/GeSn heterostructures is demonstrated. The ring shape allows for enhanced strain relaxation, leading to improved optical properties and carrier guiding. Partial undercutting of the ring further promotes strain relaxation while maintaining adequate heat sinking. Lasing is achieved at temperatures up to 90 K, with a T0 of 75 K. The scaling of the threshold current density with the inverse of the outer circumference is attributed to optical losses at the etched surface. The results of this study will guide further optimization of the device towards improving electrical injection and increasing the bandgap directness of the active material using stressors.
Article
Chemistry, Multidisciplinary
Jina Lee, A-Re Jeon, Hye Jin Lee, Ukseon Shin, Yiseul Yoo, Hee-Dae Lim, Cheolhee Han, Hochun Lee, Yong Jin Kim, Jayeon Baek, Dong-Hwa Seo, Minah Lee
Summary: Fire and explosion hazards are a major obstacle to the widespread adoption of lithium-ion batteries in electric vehicles and energy storage systems. This study demonstrates that molecular engineering of linear carbonates can lead to thermally stable high-performance batteries, by combining alkyl-chain extension and alkoxy substitution. The specifically designed electrolyte exhibits a higher flash point and effectively prevents thermal explosion under abuse conditions.
ENERGY & ENVIRONMENTAL SCIENCE
(2023)
Article
Chemistry, Multidisciplinary
Vellaichamy Joseph, Albertus Adrian Sutanto, Cansu Igci, Olga A. Syzgantseva, Vygintas Jankauskas, Kasparas Rakstys, Valentin I. E. Queloz, Hiroyuki Kanda, Ping-Yu Huang, Jen-Shyang Ni, Sachin Kinge, Ming-Chou Chen, Mohammad Khaja Nazeeruddin
Summary: The study synthesized BT-4D, TT-4D, and QT-4D compounds for low-cost HTMs in PSCs, with BT-4D showing the best efficiency and stability. BT-4D has a high thermal decomposition temperature of over 400 degrees Celsius, allowing PSCs to maintain up to 98% of their initial efficiency after prolonged illumination.
Article
Multidisciplinary Sciences
Babak Nemati Bideh, Majid Moghadam, Ahmad Sousaraei, Behnoosh Shahpoori Arani
Summary: A series of Ir(III) complexes based on phenanthroimidazole (PI) were synthesized to achieve efficient and stable yellow-to-orange LEC devices. These complexes showed appropriate electrochemical stability and significant suppression of concentration quenching in thin films. The fabricated LECs exhibited long device lifetimes and high external quantum efficiency, indicating their potential for display and lighting applications.
SCIENTIFIC REPORTS
(2023)
Article
Nanoscience & Nanotechnology
Shanqiu Liu, Sissi de Beer, Kevin M. Batenburg, Hubert Gojzewski, Joost Duvigneau, G. Julius Vancso
Summary: The interface between nucleating agents and polymers is crucial for cell nucleation in polymer foaming. Silica nanoparticles grafted with a thin PDMS shell exhibit the highest nucleation efficiency, while PS- and PMMA-grafted nanoparticles show lower efficiency.
ACS APPLIED MATERIALS & INTERFACES
(2021)
Article
Chemistry, Multidisciplinary
H. Yasemin Yenilmez, Nazli Farajzadeh, Gulsah Tollu, Nilguen Guler Kusculu, Dilek Bahar, Sadin Ozdemir, Zehra Altuntas Bayir
Summary: This study synthesized three silicon phthalocyanines (SiPc1-3) with different ligands attached. The effects of these ligands on the biological features of water-soluble silicon phthalocyanines were investigated. The compounds displayed antimicrobial and anti-cancer activities, with SiPcQ3 showing the highest in vitro anticancer activity against the tested cell.
Article
Engineering, Manufacturing
Yijiao Xue, Zhewen Ma, Xiaodong Xu, Mingxia Shen, Guobo Huang, Serge Bourbigot, Xiaoqing Liu, Pingan Song
Summary: This study designs a series of polyphosphoramides with tunable structures and compositions. By balancing hydrogen bonding and interfacial tension, it increases the tensile strength and toughness of PLA, leading to a desirable UL-94V-0 rating and a high limited oxygen index (LOI).
COMPOSITES PART A-APPLIED SCIENCE AND MANUFACTURING
(2021)
Article
Chemistry, Physical
Ramakrishnan Velmurugan Adith, Kanagaraj Madasamy, James Ebenezer, Nagarajan Mohanapriya, Saikiran Kosame, Balamurugan Kesani Ramesh, Murugavel Kathiresan, Shanmugam Senthil Kumar, Naveen Chandrasekaran
Summary: The in situ synthesis of PFUA was reported by reacting specific compounds, which were then pyrolyzed to obtain magnetically materials with different properties. Among them, PFUA pyrolyzed at 800 degrees C showed the best electrocatalytic activity towards ORR.
MOLECULAR CATALYSIS
(2021)
Article
Materials Science, Multidisciplinary
Dominik Knozowski, Pradeep Vallachira Warriam Sasikumar, Romain Dubey, Marcel Aebli, Kostiantyn Kravchyk, Grzegorz Trykowski, Maksym Kovalenko, Thomas Graule, Monika Wilamowska-Zawlocka, Gurdial Blugan
Summary: In this work, a nanocomposite based on silicon oxycarbide and tin nanoparticles was synthesized using UV light. The SiOC ceramic matrix with a conductive free carbon phase showed excellent electrochemical stability and lithium-ion storage capacity. The SiOC/Sn nanocomposite exhibited high reversible capacity and stability as an anode for Li-ion batteries.
APPLIED MATERIALS TODAY
(2022)
Article
Chemistry, Multidisciplinary
Huanhuan Shi, Shuai Fu, Yannan Liu, Christof Neumann, Mingchao Wang, Haiyun Dong, Piotr Kot, Mischa Bonn, Hai Wang, Andrey Turchanin, Oliver G. Schmidt, Ali Shaygan Nia, Sheng Yang, Xinliang Feng
Summary: The molecular heterostructures of black phosphorus (BP) and hexaazatriphenylene derivatives (BP/HATs) improve environmental stability and charge transport properties, decreasing surface electron density and enhancing carrier mobility. The strategy not only extends the ambient lifetime of BP sheets but also provides a new avenue for enhancing the physicochemical properties of other air-sensitive 2D semiconductors.
ADVANCED MATERIALS
(2021)
Review
Chemistry, Multidisciplinary
Javier A. Cabeza, Pablo Garcia-Alvarez
Summary: Two synthetic approaches have been utilized to synthesize transition metal complexes with tridentate PEP tetryl ligands. One approach involves the oxidative addition of an E-X bond (X=H, C or halogen) to a low-valent transition metal complex using tetrelanes as the metal-free precursor, while the other approach involves the insertion of an E atom into an M-X bond (X=Cl) of the metal precursor or derivatization of the E atom after coordination to the metal using tetrylenes. This review discusses the different types of PEP tetryl ligand frameworks found in transition metal complexes for each synthetic approach.
CHEMISTRY-A EUROPEAN JOURNAL
(2023)
Article
Chemistry, Physical
K. C. Seetha Lakshmi, Balaraman Vedhanarayanan, Hsiu-Yao Cheng, Xiaobo Ji, Hsin-Hui Shen, Tsung-Wu Lin
Summary: In this research, two organic copolymers with nanorod-like morphology were synthesized as cathode materials for aqueous proton batteries, leading to improved performance and temperature adaptability. Among them, the copolymer AN-PA exhibits the highest specific capacity and energy density in 2 M HCl.
JOURNAL OF COLLOID AND INTERFACE SCIENCE
(2022)
Article
Energy & Fuels
Erick Soria-Figueroa, Violeta Y. Mena-Cervantes, Montserrat Garcia-Solares, Raul Hernandez-Altamirano, Jorge Vazquez-Arenas
Article
Energy & Fuels
Emilio A. Viornery-Portillo, Brenda Bravo-Diaz, Violeta Y. Mena-Cervantes
Article
Energy & Fuels
Fabian S. Mederos-Nieto, Adid O. Santoyo-Lopez, Raul Hernandez-Altamirano, Violeta Y. Mena-Cervantes, Fernando Trejo-Zarraga, Guillermo Centeno-Nolasco, Edgar Ramirez-Jimenez
Summary: This study outlines the production of renewable fuels from castor bean seeds in two stages, first obtaining castor oil methyl esters through reactive extraction and then applying hydrotreating process. Experiments showed that under moderate operating conditions, a higher yield and product selectivity of the kerosene fraction can be achieved.
Article
Chemistry, Inorganic & Nuclear
Gelen Gomez-Jaimes, Iran Rojas Leon, Rodolfo Martinez Romero, Hiram I. Beltran, Braulio Rodriguez-Molina, Wolf Hiller, Klaus Jurkschat, Iran F. Hernandez, Herbert Hoepfl
Summary: The synthesis and characterization of six dinuclear organotin building blocks were reported, with the crystal and molecular structures of BD2 determined by single-crystal X-ray diffraction analysis, revealing the formation of molecular strands. Additionally, a related molecular macrocyclic structure was generated through reaction and DFT calculations were performed to study the molecular conformers of M1.
EUROPEAN JOURNAL OF INORGANIC CHEMISTRY
(2021)
Article
Energy & Fuels
Abraham F. Moreno-Garcia, Elier Ekberg Neri-Torres, Violeta Y. Mena-Cervantes, Raul Hernandez Altamirano, Gabriel Pineda-Flores, Rosa Luna-Sanchez, Montserrat Garcia-Solares, Jorge Vazquez-Arenas, Jessica K. Suastes-Rivas
Summary: A native microalgae consortium (NMC) isolated from a wastewater treatment plant has been shown to effectively remove Cr(III) contaminants, with potential for producing biofuels in biorefineries. The consortium's high adsorption efficiency and molecular characterization indicate promising features for sustainable resource-efficient biomass use in a circular bioeconomy.
Article
Environmental Sciences
A. Ramirez-Estrada, V. Y. Mena-Cervantes, F. S. Mederos-Nieto, G. Pineda-Flores, R. Hernandez-Altamirano
Summary: This study investigated the recalcitrance of eight lignocellulosic biomass samples through spectroscopy and thermogravimetric analysis, identifying four distinct resistance trends that can classify uncharacterized lignocellulosic biomasses.
INTERNATIONAL JOURNAL OF ENVIRONMENTAL SCIENCE AND TECHNOLOGY
(2022)
Article
Chemistry, Multidisciplinary
Iran Rojas-Leon, Gelen Gomez-Jaimes, Pedro Montes-Tolentino, Wolf Hiller, Hazem Alnasr, Braulio Rodriguez-Molina, Iran F. Hernandez-Ahuactzi, Hiram Beltran, Klaus Jurkschat, Herbert Hopfl
Summary: Hydrolysis reactions of di- and trinuclear organotin halides resulted in large novel cage compounds containing Sn-O-Sn bridges, with octanuclear tetraorganodistannoxanes showing double-ladder motifs. Among them, the co-crystal 2.0.48 I-2 exhibited the largest spacing reported to date for distannoxane-based double ladders. DFT calculations were conducted for both hexanuclear cage compound and a related octanuclear congener alongside experimental work.
CHEMISTRY-A EUROPEAN JOURNAL
(2021)
Article
Green & Sustainable Science & Technology
Adriana N. Gutierrez-Lopez, Violeta Y. Mena-Cervantes, Selene M. Garcia-Solares, Jorge Vazquez-Arenas, Raul Hernandez-Altamirano
Summary: A low-cost catalyst was synthesized for biodiesel production using Jatropha curcas L. oil, achieving a high conversion rate of 93.24% under optimized reaction conditions. The catalyst load was identified as the most critical factor affecting the transesterification reaction.
JOURNAL OF CLEANER PRODUCTION
(2021)
Article
Energy & Fuels
Simon Martinez-Martinez, Daniel F. de la Rosa-Urbalejo, Luis F. Rua-Mojica, Raul Hernandez-Altamirano, Violeta Y. Mena-Cervantes
Summary: Experiments were conducted to compare the emissions and fuel consumption of different volume ratios of waste cooking oil biodiesel blends and petroleum diesel. The study found that a 5% volume blend showed the best performance in terms of emissions reduction and fuel consumption, making it a potential additive for petroleum diesel.
Article
Biochemistry & Molecular Biology
Hiram Isaac Beltran, Salomon J. Alas-Guardado, Pedro Pablo Gonzalez-Perez
Summary: In this study, the folding of 7 hydrophobic-polar sequences in two types of 2D-square space lattices, homogeneous and correlated, was tested. It was found that using correlated networks led to more successful structural trials compared to a homogeneous lattice. The majority of the sequences were designed by the researchers, and the goal of the study was to obtain a modified 2D HP lattice model that mimics protein folding in crowded environments. The results showed that folding sequences in crowded spaces achieved better results than in homogeneous ones.
JOURNAL OF MOLECULAR MODELING
(2022)
Article
Energy & Fuels
Violeta Y. Mena-Cervantes, Simon Martinez-Martinez, Oscar A. de la Garza, Raul Hernandez-Altamirano, Miguel Garcia-Yera, Miguel F. Altamirano-Muratalla
Summary: This study evaluates the macroscopic properties of fuel spray, such as penetration, angle, and area, in blends of Waste Cooking Oil Biodiesel (WCO) produced at semi-industrial scale and commercial Ultra Low Sulphur Diesel (ULSD) using a split injection strategy. The results show that the increase in density and viscosity directly affects spray tip penetration, while surface tension affects spray angle. The second injection event provides an improved mixing process compared to the first injection event for all fuels.
Article
Energy & Fuels
Alejandro Ramirez-Estrada, Violeta Y. Mena-Cervantes, Ignacio Elizalde-Martinez, Gabriel Pineda-Flores, Raul Hernandez-Altamirano
Summary: The aim of this study was to remove hemicellulose and lignin from corncob using chemical pretreatments, and investigate their effects on the composition, microstructure, and thermal properties of corncob. The biomass was pretreated with H2SO4 and NaOH solutions to dissolve hemicellulose and lignin. The acid pretreatment disrupted the hemicellulose structure by hydrolysis of glycoside bonds, while the lignin was removed during alkaline pretreatment by solvation of aryl groups.
Article
Chemistry, Multidisciplinary
Fernando Gonzalez Chavez, Hiram Isaac Beltran
Summary: Two new 1D metal-organic frameworks, PBIA-Tm-1D and PBIA-Er-1D, were successfully synthesized from a semi-flexible PBIA ligand and lanthanide salts using solvothermal methodology. Characterization techniques confirmed their structures and thermal stability, with modulation of dimensionality observed based on the ligand-to-metal ratio. This modulation is promising for further applications due to its relation to lanthanide contraction and physicochemical characteristics.
NEW JOURNAL OF CHEMISTRY
(2021)
Article
Engineering, Environmental
Brandon Reyes-Romero, Adriana N. Gutierrez-Lopez, Raul Hernandez-Altamirano, Violeta Y. Mena-Cervantes, Estela Ruiz-Baca, Elier E. Neri-Torres, Isaac Chairez, Selene M. Garcia-Solares, Jorge Vazquez-Arenas
Summary: Microbial consortia were isolated and enriched in discontinuous reactors under anaerobic conditions using different stoichiometric ratios of acetate: Cr(III) concentration. The removal of Cr(III) occurred through both abiotic and biotic processes, with the enriched bacteria identified as Lactobacillus diolivorans and Lactobacillus brevis. The consortia mainly consisted of pleomorphic bacilli undergoing complex formations with Cr(III).
JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING
(2021)
Article
Energy & Fuels
Jocelyn Alejandra Cortez-Nunez, Maria Eugenia Gutierrez-Castillo, Violeta Y. Mena-Cervantes, Angel Refugio Teran-Cuevas, Luis Raul Tovar-Galvez, Juan Velasco