Article
Chemistry, Organic
Riccardo Giovanelli, Lorenzo Lombardi, Riccardo Pedrazzani, Magda Monari, Marta Castineira Reis, Carlos Silva Lopez, Giulio Bertuzzi, Marco Bandini
Summary: A carbonylation-carboxylation synthetic sequence is achieved via double CO2 fixation. The combination of Ni-catalyzed cross-electrophile coupling and AlCl3 triggers a cascade reaction resulting in the formation of three consecutive C-C bonds in a single operation. This strategy provides a novel synthesis route for ketones through Lewis acid-assisted carbon dioxide valorization, demonstrated by computational insights and labeling experiments.
Article
Chemistry, Organic
Riccardo Giovanelli, Lorenzo Lombardi, Riccardo Pedrazzani, Magda Monari, Marta Castineira Reis, Carlos Silva Lopez, Giulio Bertuzzi, Marco Bandini
Summary: This study presents a carbonylation-carboxylation synthetic sequence through double CO2 fixation. By utilizing AlCl3, a Ni-catalyzed cross-electrophile coupling reaction triggered a cascade reaction, resulting in the formation of three consecutive C-C bonds in a single operation. This strategy offers a novel synthetic route to ketones through Lewis acid assisted carbon dioxide valorization. Computational insights revealed the unique dual function of AlCl3, and labeling experiments with (CO2)-C-13 confirmed the genuine incorporation of CO2 in both functional groups.
Article
Chemistry, Multidisciplinary
Chuhan Lv, Xuewei Yang, Zongkang Wang, Ming Ying, Qingguo Han, Shuangfei Li
Summary: The research demonstrates that amination modification significantly improves the performance of bioelectrodes, leading to increased enzyme immobilization and activity, enhanced peak current intensity and transfer rate, as well as remarkable electro-activity and favorable reaction at the electrode.
Article
Chemistry, Physical
Ida Ziccarelli, Raffaella Mancuso, Francesco Giacalone, Carla Calabrese, Valeria La Parola, Alex De Salvo, Nicola Della Ca', Michelangelo Gruttadauria, Bartolo Gabriele
Summary: This article reports the successful heterogenization of the classical PdI(4)(2-)carbonylation catalyst on multi-walled carbon nanotubes. The newly developed heterogeneous catalyst shows good activity and recyclability in the oxidative monoaminocarbonylation reaction, with limited metal contamination in the final organic compounds.
JOURNAL OF CATALYSIS
(2022)
Article
Materials Science, Multidisciplinary
Hai-Jun Yang, Ying-Xia Ma, Xiao-Feng Shi, Xiao-Hua Li, Jia-Wei Wang, Wen-Li Meng, Jia-Geng Xue
Summary: In this study, MoS2 nanoflowers were successfully decorated on multiwall carbon nanotubes (MWCNTs) using a solvothermal method. The obtained MoS2/MWCNTs nanohybrid exhibited a large surface area and abundant adsorption sites for Ag(I) ions. The maximum adsorption capacity of the nanohybrid for Ag(I) was significantly higher than that of pure MoS2. Therefore, the MoS2/MWCNTs nanohybrid shows promise as a candidate material for Ag(I) removal from wastewater.
DIAMOND AND RELATED MATERIALS
(2022)
Article
Chemistry, Multidisciplinary
Sofiya A. Runikhina, Oleg I. Afanasyev, Ekaterina A. Kuchuk, Dmitry S. Perekalin, Rajenahally V. Jagadeesh, Matthias Beller, Denis Chusov
Summary: Converter gas, a large scale waste product, is usually burned and contributes to greenhouse gas emissions. However, this study shows that it can be utilized as a reducing agent in organic reactions to produce valuable pharmaceuticals and agrochemicals. The gas was used in the synthesis of amide-based drug molecules and classical reductive amination reactions.
Article
Materials Science, Multidisciplinary
Xin Zhang, Wenqing Zhang, Jianying Dai, Mingzi Sun, Jun Zhao, Lifei Ji, Lin Chen, Fanlong Zeng, Fengchun Yang, Bolong Huang, Liming Dai
Summary: A simple strategy to produce carboxyl-enriched multiwalled carbon nanotubes with stable and high electrocatalytic activities for oxygen evolution reaction (OER) in acidic solutions has been reported, showing superior performance comparable to precious metal oxides RuO2 and IrO2. The catalytic mechanism involving organic functional groups has been revealed, providing new insights into the importance of these groups in electrocatalytic processes and guiding the design of novel metal-free catalysts.
Review
Chemistry, Organic
Tetsuaki Fujihara
Summary: This review summarizes the methods of installing boron and carbonyl functionalities in unsaturated hydrocarbons using copper catalysts, including formylation and acylation reactions, simultaneous incorporation of boron and carboxyl groups, and borocyanation reactions.
ASIAN JOURNAL OF ORGANIC CHEMISTRY
(2022)
Article
Chemistry, Multidisciplinary
Zheng-Jian Li, Ming-Yang Wang, Chu-Qiao Li, Wei-Long Zeng, Wei Li
Summary: Incorporating amino functionality into organic synthesis is highly important. In this study, we report an intermolecular dearomative aminofunctionalization by adding simple amines to chromium-bound arenes, allowing for the rapid synthesis of complex compounds containing amino and amide functionalities under CO-gas-free conditions. This work also demonstrates the first application of nitrogen-based nucleophiles in eta(6)-coordination-induced arene dearomatizations.
CHEMISTRY-A EUROPEAN JOURNAL
(2023)
Article
Chemistry, Multidisciplinary
Sanjeev Kumar, Ajay K. Singh
Summary: In the past few decades, various strategies have been developed for the synthesis of cross-electrophile coupling products through the activation of C(sp(3))-O bonds. However, the use of expensive catalysts, stoichiometric oxidants or reductants, and the low gas-liquid reaction surface-to-volume ratio pose significant challenges in this field.
Article
Chemistry, Physical
Yuzhu Xu, Yaru Liu, Penglei Cui, Ningzhao Shang, Chun Wang, Yongjun Gao
Summary: A novel strategy utilizing a popping process and carbothermal reduction was developed to create a stable nickel catalyst (Ni-NC). The encapsulated nickel catalyst exhibited high stability in air atmosphere and excellent catalytic activity in a one-pot cascade reaction involving nitro-reduction and reductive amination of nitroarenes.
APPLIED CATALYSIS A-GENERAL
(2021)
Article
Chemistry, Organic
Lingfei Hu, Han Gao, Yanlei Hu, Xiangying Lv, Yan-Bo Wu, Gang Lu
Summary: The mechanism and origins of regio- and stereoselectivities of Cu-catalyzed alkyne difunctionalization with CO2 and trialkyl boranes were computationally investigated. The results show that vicinal addition is disfavored due to the inertness of the alkyl copper intermediate. Favored geminal addition proceeds through a cationic Cu-mediated migration pathway. Energy decomposition analysis reveals that σ)(π Pauli repulsion is the dominant factor controlling stereoselectivity.
ORGANIC CHEMISTRY FRONTIERS
(2022)
Article
Chemistry, Multidisciplinary
Steven Stevenson, Xiaoyang Liu, D. Mathew Sublett, Ryan M. Koenig, Tiffany L. Seeler, Katelyn R. Tepper, Hannah M. Franklin, Xiaoling Wang, Rong Huang, Xu Feng, Kevin Cover, Diego Troya, Narasimhamurthy Shanaiah, Robert J. Bodnar, Harry C. Dorn
Summary: Despite efforts to isolate larger tubular fullerenes and pristine single-walled carbon nanotubes, challenges persist in both their isolation and property studies. A new isolation protocol for highly tubular fullerenes has been reported, along with spectroscopic characterization of [5,5] fullertube family members.
JOURNAL OF THE AMERICAN CHEMICAL SOCIETY
(2021)
Article
Materials Science, Ceramics
Sourav Goswami, Kunal Ghosh, Ranajit Ghosh, Nilrudra Mandal
Summary: Research shows that the addition of 0.1 wt% multi-walled carbon nanotubes (MWNTs) significantly improves the antifriction and anti-wear performance of zirconia-toughened alumina. Dry sliding tests reveal a load-dependent transition in the lubrication mechanism, where low loads result in reduced friction through sliding-rolling response of CNTs, and high loads lead to the formation of a uniform lubricating film through the crushing and smearing of nanotubes. This work opens new possibilities for the application of CNT-alumina tribo-ceramics in industries such as manufacturing and mining.
INTERNATIONAL JOURNAL OF APPLIED CERAMIC TECHNOLOGY
(2023)
Article
Engineering, Chemical
Bruno Alderete, Frank Muecklich, Sebastian Suarez
Summary: Carbon nanotubes (CNT) exhibit exceptional mechanical, transport, and optical properties, making them highly attractive to researchers. They also possess excellent lubricating capabilities and electrical conductivity, making them promising solid lubricants in electrical contacts. In this study, three different CNT coatings were deposited on copper platelets and characterized for their electrical resistance during fretting wear, wear protection, chemical composition of fretting marks, and the effects of CNT coating thickness, duration, normal load, and humidity. Thicker CNT coatings provide better wear protection and maintain similar electrical behavior to uncoated copper, or even improve electrical resistance. The compaction of the porous CNT coating is important for optimal electrical performance under low humidity conditions. Longer fretting tests result in displacement of the coatings, but they still offer improved electrical resistance compared to uncoated samples. Thicker CNT coatings can withstand higher loads during fretting due to increased lubricant reservoir, with carbonaceous tribofilm remaining at the contacting interface after 5,000 fretting cycles regardless of normal load.
Article
Materials Science, Multidisciplinary
Bhanu K. Goriparthi, P. N. E. Naveen, H. Ravi Shankar, Somnath Ghosh
MATERIALS RESEARCH EXPRESS
(2019)
Article
Materials Science, Biomaterials
Syed Ilias Basha, Somnath Ghosh, K. Vinothkumar, B. Ramesh, P. Hema Praksh Kumari, K. V. Murali Mohan, E. Sukumar
MATERIALS SCIENCE AND ENGINEERING C-MATERIALS FOR BIOLOGICAL APPLICATIONS
(2020)
Article
Materials Science, Multidisciplinary
T. Rajesh Kumar Dora, Somnath Ghosh, R. Damodar
MATERIALS RESEARCH EXPRESS
(2020)
Article
Materials Science, Composites
Bhanu K. Goriparthi, Pasala Naga Eswar Naveen, Hota Ravi Sankar
Summary: The study aimed to enhance the load bearing capacity and life of POM gears by fabricating composites with different additives, with composite gears containing 1% silanized CNTs and composite gears containing 10% PTFE and 1% silanized CNTs showing better performance at all applied torques and rotational speeds.
POLYMER COMPOSITES
(2021)
Review
Engineering, Electrical & Electronic
Nisha Dhiman, Vivek Sharma, Somnath Ghosh
Summary: The demand for renewable-energy-based systems has led to the development of sustainable energy nanomaterials derived from biomass, such as cotton-based electrodes. These cotton-derived nanomaterials have excellent properties and can improve the performance of electronic devices. This Review provides a detailed understanding of cotton-derived energy nanomaterials and their applications in various energy storage and conversion devices.
ACS APPLIED ELECTRONIC MATERIALS
(2023)
Review
Materials Science, Multidisciplinary
Nisha Dhiman, Somnath Ghosh, Yogendra Kumar Mishra, Kumud Malika Tripathi
Summary: Developing nanozymes, enzyme-mimicking nanomaterials, has enormous scientific and practical significance in overcoming issues such as instability, difficult storage, and high cost associated with natural enzymes. The emergence of nano-carbons has significantly advanced the field of enzyme mimetics due to their unique structure and properties. Nano-carbons, with their large specific surface area, maximize active sites and accelerate electron transfer in catalytic reactions, serving as direct substitutes for natural enzymes.
MATERIALS ADVANCES
(2022)
Proceedings Paper
Materials Science, Multidisciplinary
P. N. E. Naveen, Batha Sujith Kumar, Bhanu Kiran Goriparthi, Ravi Sankar Hota, M. Chaitanya Mayee, S. S. S. V. Gopala Raju
Summary: The paper focuses on designing and analyzing thin-rimmed gears made of composite materials to achieve high strength and high speed rotation, with an emphasis on heat resistance and wear resistance.
MATERIALS TODAY-PROCEEDINGS
(2021)
Proceedings Paper
Materials Science, Multidisciplinary
P. N. E. Naveen, Rama Santosh Kumar Annapu, Ravi Sankar Hota, Bhanu K. Goriparthi, K. Raghu Ram Mohan Reddy, V. Satyanarayana
Summary: Gears transmit motion through direct contact, where tangential contact leads to the development of three-dimensional stresses. This paper investigates the fatigue behavior of gear wheels under different loading conditions, focusing on loading location and materials used.
MATERIALS TODAY-PROCEEDINGS
(2021)
Proceedings Paper
Materials Science, Multidisciplinary
P. N. E. Naveen, M. Chaitanya Mayee, Pothala Gayathri, Bhanu Kiran Goriparthi, K. Raghu Ram Mohan Reddy
Summary: This paper focuses on designing lightweight gears using short fiber reinforced thermoplastic materials, optimizing models with genetic algorithm and conducting further analysis in CATIA and ABAQUS software. The study investigates the impact of dynamic loads on shafts to determine the optimal material selection for lightweight gears.
MATERIALS TODAY-PROCEEDINGS
(2021)
Proceedings Paper
Materials Science, Multidisciplinary
P. N. E. Naveen, Bhanu Kiran Goriparthi, M. Chaitanya Mayee
MATERIALS TODAY-PROCEEDINGS
(2019)
Proceedings Paper
Engineering, Mechanical
Bommidi Atcharao, P. Poorna Mohan, P. N. E. Naveen
ADVANCES IN FLUID AND THERMAL ENGINEERING
(2019)
