Article
Chemistry, Physical
Gaojie Han, Zhiguo Ma, Bing Zhou, Chengen He, Bo Wang, Yuezhan Feng, Jianmin Ma, Lin Sun, Chuntai Liu
Summary: A flexible and ultrathin CNF/TRGO@Ni film with enhanced electrical conductivity and EMI shielding effectiveness has been successfully fabricated in this study. The film maintains only a 7.5% decline in electrical conductivity and EMI SE after being bent 1000 cycles due to its excellent mechanical flexibility. The EMI shielding mechanism is attributed to the combination of enhancing impedance mismatch, multireflection in brick-mortar lamellar structure, and endowing synergetic loss by graphene and Ni nanoparticles.
JOURNAL OF COLLOID AND INTERFACE SCIENCE
(2021)
Article
Chemistry, Physical
Ali Sedighi, Malek Naderi, Bogumil Brycki
Summary: The design of three-dimensional architectures with different multi-interface and the identification of suitable nanomaterials have made significant progress. Lightweight wearable electromagnetic interference shielding materials with promising microwave absorption performances have been developed by integrating conducting and magnetic nanomaterials onto the porous structure of nonwoven fabric. The layered structure and specific materials enhance the absorption capability of the composite.
JOURNAL OF ALLOYS AND COMPOUNDS
(2023)
Article
Chemistry, Physical
Yongmin Kim, Byeong-Joo Lee
Summary: To improve the cycle performance of Sn anodes, alloying metal elements such as Cu, Mn, and Ni are studied. Atomistic simulations reveal that Cu is the best alloying element in terms of reducing volume expansion and improving Na diffusion rate in Sn base alloy anode materials.
JOURNAL OF POWER SOURCES
(2023)
Article
Chemistry, Multidisciplinary
Abdulcabbar Yavuz, Murat Artan, Necip Fazil Yilmaz
Summary: This study fabricated flexible electrodes for supercapacitor applications by electrodeposition of copper and nickel-based materials from Ethaline ionic liquid. The optimized deposition potential showed improved capacitance and self-discharge behavior.
JOURNAL OF PHYSICS AND CHEMISTRY OF SOLIDS
(2022)
Article
Materials Science, Multidisciplinary
Nitasha Komal, Ghulam Ali, Manzar Sohail, Muhammad Mazhar, Zahida Malik, M. Hamid Sarwar Wattoo
Summary: This article examines the acceptance of women as shamans in North and Central Asian Shamanism and as witches in Continental Europe during the Middle Ages, focusing on their roles in healing practices and the reasons behind them. It discusses historical evidence that demonstrates mankind's interest in its environment and fascination with unknown, mysterious, and mystical events throughout the cultural process.
MATERIALS CHEMISTRY AND PHYSICS
(2023)
Article
Metallurgy & Metallurgical Engineering
Linlin Yuan, Wei Wang, Xiaoyu Chen, Xiaomeng Huang, Yuefeng Qi
Summary: The study developed an Al-Cu-Si-Ni-Mg brazing filler metal for joining 6063 aluminum alloy and graphite metallized with Ag-Cu-Ti paste. Results showed that joints of good quality can be produced at a brazing temperature of 550°C for 10 minutes, with an average shear strength of 21 MPa. The bonding area mainly consists of various phases including alpha-Al, Ag rich phase, alpha + Al2Cu + Si, Al2Cu, and TiC.
WELDING IN THE WORLD
(2021)
Article
Chemistry, Physical
Kazimierz Czapczyk, Pawel Zawadzki, Natalia Wierzbicka
Summary: This article presents the mechanical testing results of Ni-P/Si3N4 nanocomposite and hybrid Ni-P/Si3N4/graphite coatings deposited on AW-7075 aluminum alloy. The coatings were characterized in terms of microhardness, surface roughness, and adhesion to the aluminum substrate. The addition of particles or nanoparticles with higher hardness than the base Ni-P coating was found to improve the mechanical properties of the coatings.
Article
Materials Science, Ceramics
Chen Li, Ruoyu Han, Jinyue Geng, Ming Gao, Qifan Li
Summary: Electrical explosion is a powerful method for synthesizing graphene-related materials. The morphology of the products is influenced by the confined environment. In water and tube explosions, the graphite products are compacted to form stacked graphite sheets. In contrast, typical spherical nanoparticles are synthesized in free air explosions.
CERAMICS INTERNATIONAL
(2022)
Article
Materials Science, Multidisciplinary
Jia-Wei Wang, Tian-Li Meng, Ying-Xia Ma, Lei Lei, Jing Li, Fen Ran
Summary: In this study, nickel metal-organic frameworks (Ni-MOFs) were grown in situ on graphite nanosheets (GNS) to form GNS decorated with Ni-MOFs (Ni-MOFs/GNS) using a one-pot solvothermal method. The electrochemical properties of the Ni-MOFs/GNS as electrode materials could be tuned by adjusting the amount of GNS and the experimental conditions to regulate the structures. Moreover, the in situ growth of Ni-MOFs in GNS improved the conductivity and dispersion of Ni-MOFs to avoid aggregation. The specific capacity of the Ni-MOFs/GNS electrode materials obtained at the optimal experimental conditions was 737.0C g-1 at 1 A g-1, and the capacity retention rate reached 61.1% after 10,000 cycles. The power density was 424.0 W kg-1 at an energy density of 30.0 Wh kg-1.
DIAMOND AND RELATED MATERIALS
(2023)
Article
Engineering, Environmental
Fanyi Meng, Paul Amyotte, Xiaochen Hou, Chang Li, Caodi He, Gang Li, Chunmiao Yuan, Yuntao Liang
Summary: Expandable graphite (EG) has the potential to inhibit the fire hazard of dust layers by generating compact char layers to hinder heat transfer and oxygen diffusion. Compared to traditional inertants, a small amount of EG achieves equivalent suppression effect and also acts as a flame retardant.
PROCESS SAFETY AND ENVIRONMENTAL PROTECTION
(2022)
Article
Engineering, Electrical & Electronic
Kamal A. Soliman, S. Abdel Aal
Summary: In this study, the interaction of phosgene molecule on pristine and decorated borospherene was investigated using DFT. The results indicate that the sensitivity of decorated borospherene towards phosgene increases.
MATERIALS SCIENCE IN SEMICONDUCTOR PROCESSING
(2022)
Article
Chemistry, Physical
Yao Chen, Qinghong Yuan
Summary: In this study, a novel driving force for surface segregation of CuNi alloy was discovered through first-principles theoretical calculation. It was found that carbon atoms dissolved in the CuNi alloy segregated to the surface with Ni atoms, forming a Ni-rich skin alloy. This is different from the previously reported Cu-rich skin alloy. The well-known Van der Waals interaction between graphene and the CuNi surface did not reverse the segregation tendency of the Cu-rich surface. This study provides a new approach to control the surface composition and catalytic activity of alloy catalysts.
CHEMICAL PHYSICS LETTERS
(2022)
Article
Chemistry, Physical
Byung Hyun Park, Moonsoon Cha, Sujeong Kim, Taeseong Kim, Sang Woo Joo, Ok-Sang Jung, Misook Kang
Summary: In this study, a Ru-Ni@Cu alloy catalyst with a well-connected two-phase or three-phase contact interface is fabricated as an alternative to a Pt-based catalyst for the hydrogen evolution reaction (HER) in water electrolysis. The alloy particles are grown directly on carbon paper (CP) using the hydrothermal method. The Ru-Ni@Cu alloy exhibits low overpotential, excellent catalytic activity, and stability.
JOURNAL OF ALLOYS AND COMPOUNDS
(2022)
Article
Materials Science, Multidisciplinary
Simadri Badatya, Anil Kumar, Avanish Kumar Srivastava, Manoj Kumar Gupta
Summary: In this study, a high-performance Cu-Ni nanoalloy decorated carbon nanotube reinforced poly(vinylidene fluoride) based piezoelectric nanogenerator is presented for the first time, which shows very high current and power density. The device exhibits a high output voltage and current density, as well as a high power density and piezoelectric charge coefficient. It also demonstrates very stable output performance and enhanced dielectric properties.
ADVANCED MATERIALS TECHNOLOGIES
(2022)
Article
Materials Science, Multidisciplinary
S. Vivek, S. Preethi, K. Suresh Babu
Summary: Mono/bimetals and their oxides are potential catalysts for various applications. In this study, mono (Cu, Ni) and bimetal (Cu75Ni25) decorated zinc oxide (Cu75Ni25@ZnO) nanoparticles were synthesized and their structural modifications upon thermal treatment were analyzed. The Cu75Ni25@ZnO-400 sample showed the best photocatalytic activity in the degradation of methylene blue under sunlight. The study highlights the efficiency of cost-effective bimetallic catalysts in sunlight assisted photocatalysis.
MATERIALS CHEMISTRY AND PHYSICS
(2022)
Article
Chemistry, Multidisciplinary
Neha Meena, Sunil Kumar, Vikki N. Shinde, S. Rajagopala Reddy, Himanshi, Nattamai Bhuvanesh, Anil Kumar, Hemant Joshi
Summary: This report presents the synthesis of new trans-palladium dichloride complexes with bulky selenium ligands. The characterization of these complexes, as well as their ligands, was done using various analytical techniques. The obtained results showed that these complexes exhibited efficient catalytic activity in decarboxylative Heck-coupling reactions with good yields and low catalyst loading. The study also investigated the mechanism of the reaction and highlighted the significance of the reaction working under silver-free conditions.
CHEMISTRY-AN ASIAN JOURNAL
(2022)
Article
Chemistry, Organic
Sonam, Vikki N. Shinde, Anil Kumar
Summary: A novel green method promoted by KPF6 has been developed for the synthesis of esters and amides, providing good to excellent yields (61-98%) under a wide range of reaction conditions. The method shows good performance with bioactive substrates and offers operational simplicity and sustainability, making it a practical and economically attractive approach for preparing esters and amides.
JOURNAL OF ORGANIC CHEMISTRY
(2022)
Article
Chemistry, Organic
Bhawani, Vikki N. Shinde, Sonam, Krishnan Rangan, Anil Kumar
Summary: A successful description of a mechanochemical, solvent-free Ru(II)-catalyzed reaction for the alkenylation of N-heteroaryl arenes with alkynes has been achieved, resulting in moderate to good yields with good functional group compatibility and broad substrate scope.
JOURNAL OF ORGANIC CHEMISTRY
(2022)
Article
Biochemistry & Molecular Biology
Hitesh K. Agarwal, Bhupender S. Chhikara, Guofeng Ye, Sitaram Bhavaraju, Ajay Dixit, Anil Kumar, Gustavo F. Doncel, Keykavous Parang
Summary: A series of fatty acyl derivatives of FLT were synthesized and evaluated for their anti-HIV activity. Some of these derivatives showed higher activity than the original compound and known drugs, and were effective against multidrug-resistant strains. The hydrolysis of ester bonds was critical for the anti-HIV activity. Lipophilic derivatives exhibited better cellular uptake and lower cytotoxicity.
Article
Chemistry, Multidisciplinary
Surabhi Bhatt, Neha Meena, Mukesh Kumar, Nattamai Bhuvanesh, Anil Kumar, Anuj K. Sharma, Hemant Joshi
Summary: This report describes the synthesis, characterization, and catalytic activity of two ruthenium(II) ENE pincer complexes. The complex with selenium coordination, C2, showed higher efficiency compared to the complex with sulfur coordination, C1. Interactions of these complexes with CT-DNA and BSA were also studied.
CHEMISTRY-AN ASIAN JOURNAL
(2022)
Article
Chemistry, Organic
Sonam, Nitesh K. Nandwana, Vikki N. Shinde, Krishnan Rangan, Anil Kumar
Summary: Novel 5-hydroxyimidazo[2,1-a]isoquinolin-6(5H)-ones were synthesized by Ru(II)-catalyzed reaction of 2-arylimidazoles with arylglyoxals. The method provided moderate to good yields and could be scaled up for synthesis. The reaction involved imidazole-directed Ru(II)-catalyzed ortho-dicarbonylation followed by nucleophilic cyclization. Photophysical properties of the newly synthesized compounds were investigated.
EUROPEAN JOURNAL OF ORGANIC CHEMISTRY
(2023)
Article
Chemistry, Organic
Vikki N. Sonam, Vikki N. Shinde, Krishnan Rangan, Anil Kumar
Summary: A selectfluor-promoted oxidative coupling reaction was developed for the formation of C-O, C-N, C-S, and C-Se bonds by reacting quinoxalin-2(1H)-ones with alcohols, amines, thiols, and selenols. The protocol showed high yields (53-95%) and allowed for the decoration of a wide range of quinoxalin-2(1H)-ones at the C3-position with various functional groups. The reaction proceeds via a radical pathway and features mild reaction conditions, broad substrate scope, and metal-and photocatalyst-free conditions.
JOURNAL OF ORGANIC CHEMISTRY
(2023)
Article
Chemistry, Medicinal
Srijita Paul Chowdhuri, Shiv Dhiman, Subhendu K. Das, Neha Meena, Sonali Das, Anil Kumar, Benu Brata Das
Summary: This study reports a novel antileishmanial agent C17, which can poison topoisomerase 1-DNA covalent complexes (LdTop1cc) inside parasites and inhibit its religation activity. C17 is effective against both drug sensitive and antimony-resistant L. donovani isolates without affecting human Top1. It overcomes the chemical instability of camptothecin (CPT) and shows promising results in clearing Leishmania parasites in infected mice.
JOURNAL OF MEDICINAL CHEMISTRY
(2023)
Article
Chemistry, Organic
Neha Meena, Neha Bhawani, Sonam, Krishnan Rangan, Anil Kumar
Summary: A facile and efficient synthetic method for the construction of C3-hydroxyalkylated imidazo[1,2-a]pyridines and indoles by a Zn(OTf)2-catalyzed Friedel-Crafts hydroxyalkylation of imidazo[1,2-a]pyridines and indoles with carbonyl compounds under mechanochemical conditions is reported. Good product selectivity, shorter reaction time, ambient reaction temperature, tolerance of a wide range of functional groups, broad substrate scope, moderate to good yield of products, and scalability are the salient features of the developed methodology.
JOURNAL OF ORGANIC CHEMISTRY
(2023)
Article
Chemistry, Organic
Dhananjay S. Nipate, Krishnan Rangan, Anil Kumar
Summary: A copper(II)-catalyzed cascade synthesis of 1Hpyrrolo[3,4-b]quinoline-1,3(2H)-diones has been achieved using o-amino carbonyl compounds and maleimides. This one-pot cascade strategy involves a copper-catalyzed azaMichael addition followed by condensation and oxidation, resulting in moderate to good yields (44-88%) with broad substrate scope and excellent functional group tolerance.
Article
Chemistry, Organic
Vikki N. Shinde, Bhawani Bhawani, Dhanajay S. Nipate, Sonam Sonam, Neha Meena, Krishnan Rangan, Dalip Kumar, Anil Kumar
Summary: A regioselective manganese-catalyzed ortho-hydroalkyla-tion of aryl-substituted N-heteroaromatic compounds with a range of maleimides is described. The developed C-H bond functionalization protocol allowed the introduction of the succinimide motif at the ortho- position of the aryl ring of N-heteroaromatic compounds, such as 2-arylimidazo[1,2-a]pyridines, 2-arylindazoles, 2-phenylpyridine, 2-phenyl-pyrimidine, 2-phenylimidazo[1,2-a]pyrimidine, 2-phenylimidazo[2,1-b]-thiazole, 2-phenylbenzo[d]imidazo[2,1-b]thiazole, 1-phenylindazole and 1-phenylpyrazole, to produce 3-(2-(N-heteroaryl)aryl)pyrrolidine-2,5-diones in good yields. The protocol exhibited broad substrate scope, good functional group tolerance and excellent regioselectivity under mild and additive-free reaction conditions.
SYNTHESIS-STUTTGART
(2023)
Article
Chemistry, Organic
Neha Meena, Vikki N. Shinde, Prakash N. Swami, Krishnan Rangan, Anil Kumar
Summary: This study presents a catalyst-dependent regioselective oxidative annulation of 2-arylimidazo[1,2-a]pyridines with cinnamaldehyde derivatives to construct fused N-heterocyclic frameworks. The annulation reaction using [RhCp*Cl-2](2) as catalyst afforded 5-arylnaphtho[1',2':4,5]imidazo[1,2-a]pyridine-6-carbaldehydes, while Pd(OAc)(2) catalyst led to the formation of 1,7-diarylimidazo[5,1,2-cd]indolizine-6-carbaldehydes. The reaction exhibited high yields, broad substrate scope, and excellent functional group tolerance, providing valuable compounds with different functionalities.
JOURNAL OF ORGANIC CHEMISTRY
(2023)
Article
Chemistry, Inorganic & Nuclear
Prakash N. Swami, Neha Meena, Hemant Joshi, Krishnan Rangan, Anil Kumar
Summary: This report presents the synthesis and characterization of a [CNHCNN]-pincer-type palladium(II) complex with a N-heterocyclic carbene (NHC)-derived pincer CNN ligand. The complex displayed a distorted square planar geometry around the palladium center. It was found to be an efficient catalyst for the oxidative amidation of aldehydes with 2-aminopyridines, achieving high yields under mild reaction conditions.
Article
Pharmacology & Pharmacy
Anushka Ray, Shahbaz Syed, S. Poornima, M. Pushpalatha
Summary: Sign language is the primary language for people with speech and hearing impairment. Modern technology, such as the accurate hand tracking framework MediaPipe, can help overcome communication barriers. This project utilizes custom datasets and deep learning models to enable elementary school children to learn American sign language alphabets and form basic words.
JOURNAL OF PHARMACEUTICAL NEGATIVE RESULTS
(2022)
Article
Chemistry, Organic
Neha Meena, Shiv Dhiman, Krishnan Rangan, Anil Kumar
Summary: An efficient cobalt-catalyzed tandem one-pot method has been developed for the synthesis of polysubstituted imidazo[1,5-a]-N-heteroaromatics, which involves Knoevenagel condensation followed by cobalt-catalyzed direct alkenylation. This method shows a broad substrate scope, moderate to good yields (39-74%), and scalability to gram scale.
ORGANIC & BIOMOLECULAR CHEMISTRY
(2022)
