Article
Chemistry, Inorganic & Nuclear
Md Kamal Hossain, Joerg A. Schachner, Matti Haukka, Michael G. Richmond, Nadia C. Moesch-Zanetti, Ari Lehtonen, Ebbe Nordlander
Summary: A series of new cationic dioxidomolybdenum(VI) complexes have been synthesized and characterized, showing good reactivity in oxygen atom transfer and oxidation reactions with triphenylphosphine.
Article
Chemistry, Inorganic & Nuclear
Laura M. Valdivieso M. Zarate, Cesar A. Bravo A. Sanabria, Gustavo E. Ramirez E. Caballero, Fernando Martinez Ortega
Summary: A highly selective epoxidation of α-pinene and R-carvone was achieved using a dioxo-Mo complex incorporated into a Metal-Organic Framework (MOF) type UiO-67. The reaction was facilitated by an oxygen atom transfer (OAT) using molecular oxygen as the oxidant. The catalytic system was characterized and the presence of dioxomolybdenum((VI)) units in UiO-67 was found to be proportional to the amount of epoxide monoterpene produced. Furthermore, the reaction selectivity was attributed to the absence of oxygen radicals in the reaction medium. The stability of the Mo complex was also demonstrated after multiple cycles of use.
EUROPEAN JOURNAL OF INORGANIC CHEMISTRY
(2023)
Article
Chemistry, Physical
Qian Gu, Ping Ping Jiang, Yirui Shen, Kai Zhang, Phyu Thin Wai, Agus Haryono
Summary: A lamellar porous Mo-modified carbon nitride polymer (CN-Mo) was successfully prepared by a self-assembly bottom-up method, which showed excellent optical properties and catalytic activity, enabling efficient epoxidation of olefins under mild conditions.
MOLECULAR CATALYSIS
(2021)
Article
Chemistry, Applied
Q. Henry Martinez, Alvaro A. Amaya, Edgar A. Paez-Mozo, O. Fernando Martinez, Sabine Valange
Summary: Selective oxidation of terpenes using a Mo((VI))Cl(2)O(2)Bipy/TiO2-NT catalyst under photo-assisted conditions was successful, leading to high selectivities in producing epoxides from monoterpenes. The chiral center in limonene was found to govern the formation of diastereoisomers during the reaction process, indicating stereoselectivity of the catalyst. Additionally, the Mo((VI))Cl(2)O(2)Bipy/TiO2-NT catalyst demonstrated high stability under the reaction conditions, as shown by recycling studies.
Article
Chemistry, Physical
Zhanfang Fan, Bin Lin, Yongqing Liu, Yang Liu, Maosheng Cheng
Summary: Two novel molybdenum-based heterogeneous catalysts immobilized on dendrimer-functionalized graphene oxide via electrostatic interactions (Mo-1) or covalent bonding (Mo-2) have been reported in this study. These catalysts exhibit excellent catalysis in the epoxidation of alkenes with high conversion, better selectivity, and good recyclability. The differences between the two catalysts are supported by DFT calculations and were characterized using SEM, TEM (EDS-mapping), FT-IR, XRD, and XPS.
CATALYSIS COMMUNICATIONS
(2021)
Article
Chemistry, Physical
Arijeta Bafti, Marta Razum, Edi Topic, Dominique Agustin, Jana Pisk, Visnja Vrdoljak
Summary: The study investigated the catalytic activity of dinuclear and mononuclear molybdenum(VI) complexes with aroylhydrazonato ligands in the epoxidation of cyclooctene and oct-1-ene. Different isomers of aroylhydrazones led to specific [MoO2L] units with varying catalytic activity, with TBHP in decane providing outstanding results for cyclooctene epoxidation. DFT calculations confirmed the relationship between ligand nature and reactivity with oxidant agents TBHP and H2O2, proposing a plausible mechanism with H2O2 after considering various pathways.
MOLECULAR CATALYSIS
(2021)
Article
Chemistry, Multidisciplinary
Saeid Nikafshar, Jiarun Wang, Kevin Dunne, Prakit Sangthonganotai, Mojgan Nejad
Summary: Thirteen unmodified lignin samples from various biomass sources were used to replace bisphenol A (BPA) in epoxy resin formulations using a novel method. It was found that lignins with higher phenolic hydroxy content and lower molecular weights were more suitable for this purpose, and a regression model was developed to establish correlations between lignin properties and epoxy contents. Additionally, epoxidized lignin samples with high epoxy contents showed comparable performance to a petroleum-based epoxy system when cured with a bio-based hardener.
Article
Chemistry, Multidisciplinary
Mami Miyairi, Tsuyoshi Taniguchi, Tatsuya Nishimura, Katsuhiro Maeda
Summary: Improved methods for the synthesis of linear and cyclic poly(diphenylacetylene)s using MoCl5- and WCl4-based catalytic systems have been developed. MoCl5 induces migratory insertion polymerization of diphenylacetylenes in the presence of arylation reagents such as Ph4Sn and (ArSnBu3)-Bu-n to produce cis-stereoregular linear poly(diphenylacetyelene)s with high molecular weights. On the other hand, WCl4 induces ring expansion polymerization of diphenylacetylenes in the presence of Ph4Sn or reducing reagents to produce cis-stereoregular cyclic poly(diphenylacetylene)s with high molecular weights. Both catalytic systems are applicable to the polymerization of various diphenylacetylenes having polar functional groups such as esters that are not efficiently polymerized by conventional methods.
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
(2023)
Article
Chemistry, Multidisciplinary
Robin T. K. Schock, Jonathan Neuwald, Wolfgang Moeckel, Matthias Kronseder, Luka Pirker, Maja Remskar, Andreas K. K. Huettel
Summary: It is demonstrated that adding a bismuth semimetal layer between the contact metal and the nanomaterial significantly improves the properties of the contacts, leading to better stability and less trap states.
ADVANCED MATERIALS
(2023)
Article
Biochemistry & Molecular Biology
Irina A. A. Shentseva, Andrey N. N. Usoltsev, Nikita A. A. Korobeynikov, Taisiya S. S. Sukhikh, Vladimir R. R. Shayapov, Maxim N. N. Sokolov, Sergey A. A. Adonin
Summary: Nine heterometallic iodobismuthates with the general formula Cat(2){[Bi2M2I10}] (M = Cu(I), Ag(I), Cat = organic cation) were synthesized. Their crystal structures consisted of {Bi2I10} units interconnected with Cu(I) or Ag(I) atoms through I-bridging ligands, forming one-dimensional polymers. The compounds exhibited good thermal stability below 200 degrees C, and their optical band gaps (E-g) ranged from 1.81 to 2.03 eV. Thermochromism was observed for compounds 1-9, and a linear thermal dependence of E-g was established for all studied compounds.
INTERNATIONAL JOURNAL OF MOLECULAR SCIENCES
(2023)
Article
Chemistry, Physical
Minhui Lee, Emiko Kazuma, Chi Zhang, Michael Trenary, Jun Takeya, Jaehoon Jung, Yousoo Kim
Summary: The dissociation of O-2 molecules chemisorbed on silver surfaces has been studied at the single-molecule level on Ag(110) using a scanning tunneling microscope (STM). The dissociation reaction was predominantly triggered by inelastically tunneled holes from the STM tip, influenced by the significantly distributed density of states below the Fermi level of the substrate. Action spectroscopy with the STM and density functional theory calculations revealed that direct ladder-climbing excitation of high-order overtones of the O-O stretching mode, enhanced by molecule-surface interactions, is the cause of the O-2 dissociation reaction.
JOURNAL OF PHYSICAL CHEMISTRY LETTERS
(2021)
Article
Chemistry, Multidisciplinary
Huelya Avci oezbek, Funda Demirhan
Summary: A method for the epoxidation of cis-cyclooctene using Lindqvist type POMs Cp*2MoxW6-xO17 (x=0, 2, 4, 6) and [Cp*MoxW6-xO18](-) as catalysts and 30% H2O2 as a green oxidant was studied. This catalytic system showed excellent yields for cis-cyclooctene in acetonitrile at 55 °C. The highest epoxidation efficiency of 99% was achieved under optimized conditions using Ph4P[Cp*MoW5O18] (2c).
Article
Materials Science, Multidisciplinary
Wande Cairang, Shengqiang Ma, Xing Gong, Yi Zeng, Hejie Yang, Dezhen Xue, Yuanbin Qin, Xiangdong Ding, Jun Sun
Summary: The oxidation mechanism of refractory Molybdenum exposed to oxygen-saturated lead-bismuth eutectic at 600 degrees C involves the formation of a hierarchical structure of multiple corrosion layers, starting with MoO2 and followed by PbMoO4, leading to the formation of thicker scales consisting of columnar PbMoO4 and blocky Pb2MoO5.
Article
Biochemistry & Molecular Biology
Yuliya Bespalko, Nikita Eremeev, Ekaterina Sadovskaya, Tamara Krieger, Olga Bulavchenko, Evgenii Suprun, Mikhail Mikhailenko, Mikhail Korobeynikov, Vladislav Sadykov
Summary: This study focuses on the synthesis and investigation of materials based on bismuth cerates and titanates. Different complex oxides were synthesized using different methods, and their structures were studied. The research also explores the oxygen diffusion mechanism in these materials.
Article
Chemistry, Multidisciplinary
David Skoda, Barbora Hanulikova, Ales Styskalik, Vit Vykoukal, Petr Machac, Pavel Urbanek, Eva Domincova Bergerova, Lucie Simonikova, Ivo Kuritka
Summary: In this work, a novel method for the synthesis of homogeneous molybdenum silicate spheres under non-aqueous conditions was introduced. The prepared microspheres exhibited uniform distribution of molybdenum species and showed high catalytic activity for epoxidation and oxidation reactions.
JOURNAL OF INDUSTRIAL AND ENGINEERING CHEMISTRY
(2022)
Article
Chemistry, Physical
Wu Jiang, Yijun Pang, Lingli Gu, Yao Yao, Qin Su, Weijie Ji, Chak-Tong Au
JOURNAL OF CATALYSIS
(2017)
Article
Chemistry, Physical
Yijun Pang, Yixuan Dou, Aihua Zhong, Wu Jiang, Lingli Gu, Xinzhen Feng, Weijie Ji, Chak-Tong Au
APPLIED CATALYSIS A-GENERAL
(2018)
Article
Chemistry, Physical
Yijun Pang, Aihua Zhong, Zhijia Xu, Wu Jiang, Lingli Gu, Xinzhen Feng, Weijie Ji, Chak-Tong Au
Article
Chemistry, Applied
Yixuan Dou, Yijun Pang, Lingli Gu, Yifan Ding, Wu Jiang, Xinzhen Feng, Weijie Ji, Chak-Tong Au
JOURNAL OF ENERGY CHEMISTRY
(2018)
Article
Chemistry, Multidisciplinary
Yuan Chen, Zhiquan Chen, Didi Yang, Lishan Zhu, Zhenda Liang, Yijun Pang, Li Zhou
Summary: Biocompatible palladium nanoparticles (Pd NPs) were synthesized by microorganisms Bacillus megaterium Y-4. Ultrasonication treatment enhances the absorption in NIR regions and the photothermal conversion efficiency of the Pd NPs. The resulting material exhibits excellent biocompatibility and antibacterial activity, achieving a disinfection efficiency of 99.99% against Staphylococcus aureus and Escherichia coli in less than 10 minutes with a low dosage of Pd NPs (20 mg/L).
Article
Chemistry, Analytical
Yijun Pang, Zhiquan Chen, Didi Yang, Xuke Fan, Zhenda Liang, Yongtao Xu, Sheng Ye, Jiancong Liu, Li Zhou
Summary: This study develops a novel antibacterial nanoplatform for rapid laser-induced sterilization. The nanoplatform exhibits excellent bactericidal activity at a low concentration, achieved through a combination of photodynamic and photothermal processes. It provides a feasible and efficient method for fabricating highly effective antibacterial materials.
JOURNAL OF ANALYSIS AND TESTING
(2023)
Article
Chemistry, Physical
Lingli Gu, Qin Su, Wu Jiang, Yao Yao, Yijun Pang, Weijie Ji, Chak-Tong Au
CATALYSIS SCIENCE & TECHNOLOGY
(2018)
