Article
Chemistry, Multidisciplinary
Yucheng Yuan, Yuhan Zhang, Haoyi Li, Muchun Fei, Hongna Zhang, John Santoro, Dunwei Wang
Summary: This work reports an integrated route for the direct synthesis of CH3COOH from CH4 and CO2. CO2 is first activated through electrochemical CO2 reduction and water oxidation to produce CO and O2, followed by Rh single atom catalyzed oxidative CH4 carbonylation. Results show that CH3COOH is produced through the coupling of CH4 and CO2 with high selectivity and good yield. This is the first successful integration of CO/O2 production with oxidative carbonylation reaction, which is expected to enhance the atom efficiency in carboxylation reactions utilizing preactivated CO2.
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
(2023)
Article
Biotechnology & Applied Microbiology
Shahia Khattak, Xiao-Tong Qin, Fazli Wahid, Long-Hui Huang, Yan-Yan Xie, Shi-Ru Jia, Cheng Zhong
Summary: Surface oxidation of bacterial cellulose was carried out using the TEMPO-mediated oxidation mechanism, followed by impregnation with silver sulfadiazine to create nanocomposite membranes. Analysis using FTIR and XRD determined the presence of functional groups and crystallinity, while FESEM analysis showed the impregnation of nanoparticles and increased antibacterial activity with higher TOBC and AgSD content. This method retains and enhances the reactivity of BC, making it a promising option for biomedical applications such as wound dressing and tissue engineering.
FRONTIERS IN BIOENGINEERING AND BIOTECHNOLOGY
(2021)
Article
Chemistry, Physical
Sang Won Im, Hehsang Ahn, Eun Soo Park, Ki Tae Nam, Sung Yul Lim
Summary: To improve the performance of oxygen evolution reaction, a simple and scalable approach for fabricating NiFeOxHy electrocatalysts was proposed in this study. Through electrochemical activation, the OER activity of NiFeOxHy was significantly enhanced, suggesting valuable possibilities for designing better OER electrocatalysts using simple methods.
ACS APPLIED ENERGY MATERIALS
(2021)
Article
Chemistry, Analytical
Fabian Steininger, Alexander Wiorek, Gaston A. Crespo, Klaus Koren, Maria Cuartero
Summary: A novel sensor-actuator concept is proposed using an electrochemically activated polyaniline mesh for 2D acidification of samples. This concept allows monitoring and imaging of the acid-base titration process in samples, as well as measuring the buffer capacity and spatial differences within the sample.
ANALYTICAL CHEMISTRY
(2022)
Review
Chemistry, Physical
Junjing Li, Yiqi Liang, Pengliang Jin, Bin Zhao, Zhaohui Zhang, Xiaojia He, Zilin Tan, Liang Wang, Xiuwen Cheng
Summary: This article reviews the research status and progress of sulfate-based advanced oxidation process in the removal of organic pollutants from water, and summarizes the methods of metal catalyst activation and electrochemical activation.
Article
Chemistry, Physical
Emily Manderfeld, Mauricio N. Kleinberg, Chidambaram Thamaraiselvan, Florian Koschitzki, Patricia Gnutt, Nicolas Plumere, Christopher J. Arnusch, Axel Rosenhahn
Summary: Research has shown that laser-induced graphene can resist marine bacterial attachment and reduce their viability. Superhydrophobic LIG coatings can effectively prevent bacteria accumulation. Electrochemical measurements indicate that treated LIG can reduce bacteria accumulation, thereby combating marine fouling.
APPLIED SURFACE SCIENCE
(2021)
Article
Electrochemistry
Hui Wang, Jaegeon Ryu, Scott A. McClary, Daniel M. Long, Mingxia Zhou, Mark H. Engelhard, Liangfeng Zou, Joseph Quinn, Paul Kotula, Kee Sung Han, Haiping Jia, Chongmin Wang, Rajeev Surendran Assary, Kevin R. Zavadil, Vijayakumar Murugesan, Karl T. Mueller, Yuyan Shao
Summary: This study reports the development of a surface film for Mg anodes based on electrodeposited bismuth, which improves the stability of the Mg/electrolyte interface, with fast charge-transfer kinetics and low interfacial film resistance.
JOURNAL OF THE ELECTROCHEMICAL SOCIETY
(2021)
Article
Engineering, Environmental
Jie Ye, Yue Lai, Chao Wang, Raymond Jianxiong Zeng, Changgeng Liu, Hao Lin, Shungui Zhou, Zhen He
Summary: An electrochemically driven Fe-0-activated sulfite system was developed to sustainably release Fe2+ for dewatering waste activated sludge. The system improved dewatering performance by degrading extracellular polymeric substances, reducing the live/dead cell ratio, and increasing the permeability of sludge flocs. The thermal effect in the system accelerated the release of intracellular proteins, which could be degraded by the strong oxidizing sulfate radicals. Understanding these sulfate radical-based advanced oxidation processes is important for sludge treatment.
CHEMICAL ENGINEERING JOURNAL
(2022)
Article
Engineering, Chemical
D. Syam Babu, P. Nidheesh
Summary: Arsenic pollution in groundwater is a global issue, with traditional methods struggling to completely eliminate arsenite. Oxidizing arsenite to arsenate is necessary for complete removal of arsenic. Persulfate-mediated advanced oxidation processes are effective in removing arsenite, with iron anode mediation showing better results.
SEPARATION AND PURIFICATION TECHNOLOGY
(2022)
Article
Chemistry, Physical
Qi-Qi Fu, Hui-Hui Li, Liang Xu, Yu-Da Li, Shu-Hong Yu
Summary: This study presents an in situ electrochemical post-treatment technique to rebuild a highly crystalline and stable multilayered Pd-skin structure on Pd47Cu53 nanotubes, which greatly enhances the catalytic stability of the nanotubes.
Article
Biochemistry & Molecular Biology
Daniel Rui Chen, Megha Chitranshi, Vesselin Shanov, Mark Schulz
Summary: This study fabricates a Zn-CO2 battery using a carbon nanotube (CNT) sheet as the cathode and a zinc plate as the anode. The CNT electrode is activated to increase its surface area and copper is deposited as a catalyst for CO2 reduction. The assembled battery shows higher output voltage compared to other devices, indicating the effectiveness of the activation process.
INTERNATIONAL JOURNAL OF MOLECULAR SCIENCES
(2022)
Article
Chemistry, Physical
Qing Pan, Peng Hei, Yu Song, Jianming Meng, Chang Liu, Xiao-Xia Liu
Summary: This study investigates the NH4+ storage properties of an electrochemically activated NiCo double hydroxide and demonstrates its high discharge capacity and rate capability. The introduction of H vacancies and activation process lead to improved cation adsorption capability, which enables the material to achieve high energy density and power density in NH4+-based batteries.
Article
Chemistry, Physical
Qing Pan, Peng Hei, Yu Song, Jianming Meng, Chang Liu, Xiao-Xia Liu
Summary: In this study, the NH4+ storage properties of an electrochemically activated NiCo double hydroxide were investigated for the first time. The activation process increased the discharge capacity and cation adsorption capability of the electrode. Furthermore, a NH4+-Zn hybrid cell with high energy density and good rate capability was assembled using this material as the cathode.
Article
Ecology
Karen Viacava, Jiangtao Qiao, Andrew Janowczyk, Suresh Poudel, Nicolas Jacquemin, Karin Lederballe Meibom, Him K. Shrestha, Matthew C. Reid, Robert L. Hettich, Rizlan Bernier-Latmani
Summary: This study identified microorganisms actively methylating arsenic in anoxic soil-derived microbial cultures using metagenomics, metatranscriptomics, and metaproteomics. The researchers isolated a strain of Paraclostridium sp. EML, which was confirmed to actively methylate arsenic anaerobically.
Article
Chemistry, Inorganic & Nuclear
Rajat K. Tripathy, Aneeya K. Samantara, J. N. Behera
Summary: By tuning the annealing temperature, a series of cobalt borides were synthesized and their electrocatalytic activity towards the oxygen evolution reaction (OER) was investigated. The amorphous form of cobalt boride showed higher catalytic activity due to its amorphous nature and synergy between the in situ formed catalytically active centres.
DALTON TRANSACTIONS
(2022)
Article
Chemistry, Organic
Yichao Zhao, James Theodore Merrett, Jianwen Jin, Li-Juan Yu, Michelle Louise Coote, Philip Wai Hong Chan
Summary: This study describes a synthetic method for the alpha-alkynylation of tertiary alpha-silylamines by 1-iodoalkynes, mediated by [Au-2(mu-dppm)(2)]Cl-2 and UVA LED light (lambda = 365 nm). The reaction showed excellent functional group tolerance and could be applied to a wide range of coupling partners, as well as various bioactive molecules and natural products. Experimental and computational studies suggested an oxidative quench pathway and the involvement of a dimeric metal complex in mediating the cross-coupling of two radical species, which is unprecedented in photoredox gold catalysis.
ORGANIC CHEMISTRY FRONTIERS
(2023)
Article
Chemistry, Multidisciplinary
Wanjun Xu, Shuaijun Pan, Benjamin B. Noble, Zhixing Lin, Sukhvir Kaur Bhangu, Chan-Jin Kim, Jingqu Chen, Yiyuan Han, Irene Yarovsky, Frank Caruso
Summary: This article reports on flexible metal-phenolic networks (MPNs) that exhibit stimuli-responsive behavior to various solute guests. The responsive behavior of the MPNs is primarily determined by the competitive coordination of metal ions to phenolic ligands with multiple coordination sites and solute guests. The embedding of glucose molecules into the dynamic MPNs leads to the reconfiguration of the metal-organic networks and changes in their physicochemical properties for targeted applications. This study expands the library of stimuli-responsive flexible metal-organic materials and enhances the understanding of intermolecular interactions between metal-organic materials and solute guests, which is crucial for the rational design of responsive materials for various applications.
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
(2023)
Article
Chemistry, Multidisciplinary
Jackson S. Henneveld, Farshad Shiri, Alireza Ariafard, Nigel T. Lucas, Alex C. Bissember, Bill C. Hawkins
Summary: The investigation and formalization of the distinctive dipole-transmissive dipolar cycloaddition (DTDC) methodology is reported. A DTDC procedure was developed by taking advantage of the structural complementarity of azide and diazoalkane 1,3-dipoles. This method allows for the rapid construction of functionalized polycyclic N-heterocycles through intramolecular azide-alkene 1,3-dipolar cycloadditions followed by N-derivatization and subsequent 1,3-dipolar cycloadditions.
CHEMISTRY-A EUROPEAN JOURNAL
(2023)
Article
Chemistry, Medicinal
Eman M. Alghamdi, Zahra M. Alamshany, Mohamed A. El Hamd, Ehab S. Taher, Mohammed Farrag El-Behairy, Philip L. Norcott, Adel A. Marzouk
Summary: A new series of tetrasubstituted imidazole derivatives carrying pyrimidine sulfonamide pharmacophores were synthesized and evaluated for their anticancer activities. In-vitro screening showed significant growth inhibition of up to 95% against a full 60-cell-line panel at a single dose of 10 μM. The most active compound exhibited in-vitro anticancer activities against abnormal HER2 and two mutants for EGFR. Apoptotic gene expression analysis revealed that lead compounds induced apoptosis in MCF-7 cell line and caused significant changes in the Bax/Bcl-2 expression ratio. One lead compound led to significant cell-cycle S-phase arrest, while another blocked the cell cycle at G1/S-phase causing the accumulation of cells. Docking analysis showed that these two hybrids had higher binding affinity and interaction with the active side pocket of HER2, L858R, and T790 M compared to co-crystallized ligands. Modeling simulation was consistent with the experimental evaluation.
Article
Chemistry, Inorganic & Nuclear
Angus Olding, Curtis C. Ho, Nigel T. Lucas, Alex C. Bissember
Summary: In this study, a range of unprecedented, kinetically stable alkyl-, alkenyl-, allenyl-, and alkynylpalladium(II) boronates were prepared from various Csp3, Csp2, and Csp electrophiles via a simple, general method. The structures of these complexes were secured by X-ray crystallography, and the chemical competence of a number of these intermediates in transmetalation was demonstrated.
INORGANIC CHEMISTRY
(2023)
Article
Plant Sciences
Thinley Gyeltshen, Bianca J. Deans, Curtis C. Ho, Nathan L. Kilah, Jason A. Smith, Alex C. Bissember
Summary: This study isolated two previously unreported furanosesquiterpenes and three unprecedented gamma-lactone-containing analogues from three Myoporum species. Additionally, nine previously reported furanosesquiterpenes and five other natural products were also isolated. Three distinct types of furanosesquiterpene structures were observed in each of these Myoporum species. Four sesquiterpene natural products, including the lactam-containing sesquiterpene myoporumine A, were synthesized from (-)-ngaione in two steps for each case.
JOURNAL OF NATURAL PRODUCTS
(2023)
Article
Chemistry, Multidisciplinary
Philip L. Norcott
Summary: In this study, it was found that a common platinum-on-carbon catalyst is capable of transferring the nuclear singlet state of para-hydrogen to alcohols through surface interactions, resulting in a significant increase in the signal output of hyperpolarized methanol or water.
JOURNAL OF THE AMERICAN CHEMICAL SOCIETY
(2023)
Article
Chemistry, Physical
Alex C. Bissember, Angus Olding, Curtis C. Ho, Nigel T. Lucas, Allan J. Canty
Summary: By covalently tethering a supporting ligand to a boron nucleophile, typically elusive and kinetically unstable Suzuki-Miyaura (SM) pretransmetalation species were able to be controlled. This strategy allowed for the synthesis of an organonickel(II) boronate pretransmetalation intermediate and its characterization through X-ray crystallography. Performing reactions in the presence of carbon monoxide led to pretransmetalation intermediates in carbon-ylative SM reactions-aroylmetal boronates, enabling the determination of the X-ray crystal structures of an aroylnickel(II) boronate (and an aroylpalladium(II) boronate).
Article
Materials Science, Multidisciplinary
Samuel J. Tonkin, Le Nhan Pham, Jason R. Gascooke, Martin R. Johnston, Michelle L. Coote, Christopher T. Gibson, Justin M. Chalker
Summary: With increasing applications of infrared imaging, there is a demand for low-cost alternatives to traditional infrared optics materials. Sulfur-rich copolymers show promise due to their cost-effectiveness and high refractive index. This study reports on the copolymerization of cyclopentadiene with sulfur, resulting in a plastic with the highest long-wave infrared transparency observed for this class of materials. The copolymer can be used in various lens architectures and as an infrared-transparent blind for thermal imaging equipment and clandestine surveillance, suggesting broader use of sulfur copolymers in infrared optics.
ADVANCED OPTICAL MATERIALS
(2023)
Article
Chemistry, Organic
Adriana R. Dutra-Nobre, Wesley J. Olivier, Bianca J. Deans, Nathan L. Kilah, Fernando Maya Alejandro, Jason A. Smith, Alex C. Bissember
Summary: Natural product isolation studies on Dodonaea viscosa revealed significant intraspecific variation in terpene profiles across this species. A total of 14 ent-labdane diterpenoids (including seven previously unreported compounds), four ent-kauranes (including one previously unreported compound), one rare norhopene, and two previously unreported monoterpenoid wax esters were isolated. The proposed structures were elucidated using various spectroscopic techniques and supported by additional analyses such as mass spectrometry and X-ray crystallography.
ASIAN JOURNAL OF ORGANIC CHEMISTRY
(2023)
Article
Chemistry, Organic
Thinley Gyeltshen, Wesley J. Olivier, Adriana R. Dutra-Nobre, Nathan L. Kilah, Jason A. Smith, Alex C. Bissember
Summary: Natural products isolation studies on two Dodonaea species led to the discovery of a previously unreported prenylated flavonoid with a malonic acid moiety and several other compounds from the aerial parts of Dodonaea filiformis. In addition, three previously unreported natural products, including another malonic-acid-containing prenylated flavonoid, were found from the flowers of D. viscosa. Furthermore, a revised structure is proposed for a prenylated flavonoid previously isolated from D. viscosa.
ASIAN JOURNAL OF ORGANIC CHEMISTRY
(2023)
Article
Biochemistry & Molecular Biology
Samuel D. Zarfos, Bianca J. Deans, Curtis C. Ho, Gregory J. Jordan, Jason A. Smith, Alex C. Bissember
Summary: This study focused on the isolation of natural products from eight Tasmanian Proteaceae species and three Australian Proteaceae species. Two previously unreported natural products and four rare arbutin esters were identified, supporting the idea that these unique arbutin esters can serve as markers for the chemical evolution of plant species within the Proteaceae family.
CHEMISTRY & BIODIVERSITY
(2023)
Article
Chemistry, Organic
Yi-Min Fan, Josemon George, Jiao Yu J. Wang, Michael G. Gardiner, Michelle L. Coote, Michael S. Sherburn
Summary: Through the study, it was found that imines can participate in intermolecular formal [4 + 2] cycloadditions with dendralenes, forming hexahydro- and octahydro-isoquinoline structures. After optimizing the conditions, the formal aza-Diels-Alder reaction proceeds with high regio- and stereoselectivity.
Review
Polymer Science
Gerard Audran, Elena G. Bagryanskaya, Raphael Bikanga, Michelle L. Coote, Olga Guselnikova, Chelsey L. Hammill, Sylvain R. A. Marque, Philippe Mellet, Pavel S. Postnikov
Summary: Dynamic Covalent Bonds (DCB) are labile covalent bonds that play a significant role in the design of next generation materials. Alkoxyamines exhibit a unique C-O DCB that can be cleaved under various stimuli, and the cleavage kinetics and thermodynamics can be controlled by modifying the structure of the molecules. Despite being easily incorporated into polymers, the dynamic covalent properties of alkoxyamines have not been fully utilized in materials sciences.
PROGRESS IN POLYMER SCIENCE
(2023)
Article
Chemistry, Organic
Ting-Ting Yuan, Jing Chen, Le Nhan Pham, Sayan Paul, Lorenzo V. White, Jialong Li, Ping Lan, Michelle L. Coote, Martin G. Banwell, Yu-Tao He
Summary: Efficient and versatile syntheses of methylene-bridged bis-heterocycles are described, which involve a visible light-mediated radical-relay sequence. This process begins with the homolysis of O-H bonds contained within & beta;,& gamma;-unsaturated oximes, generating oxygen-centred radicals that add to the tethered olefin. The resulting carbon-centered radical is then trapped by an added N-heteroarenium salt. These findings provide new insights into alkoxy radical-mediated transformations and access to new molecular scaffolds with potential applications in various settings.
ORGANIC CHEMISTRY FRONTIERS
(2023)
