Article
Chemistry, Physical
Bei Wan, Fan Cheng, Jian Lan, Yue Zhao, Gang Yang, Yan-Mei Sun, Li -Ping Si, Hai -Yang Liu
Summary: A series of manganese corroles with different substituents were synthesized and characterized. They were applied as catalysts for electrocatalytic hydrogen evolution reaction (HER) for the first time. The results showed that manganese corroles exhibited high HER activity in DMF solvent using acetic acid, trifluoroacetic acid, and p-toluenesulfonic acid as proton sources. Strong acid led to higher activity, and the protonation of corroles ligand may be involved in HER. The activity was enhanced by increasing the electron-withdrawing substituent of the corrole macrocycle in both organic and aqueous media.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2023)
Article
Environmental Sciences
Qian Huang, Guangyuan Meng, Xinwan Zhang, Zhengnan Fang, Ying Yan, Benren Liao, Lehua Zhang, Peng Chen
Summary: This study found that natural manganese sand (NMS) plays a significant role in activating sodium hypochlorite (NaClO), leading to higher removal efficiency of ionic organic contaminants compared to NMS or NaClO alone. The NMS activated NaClO system exhibited about 96.6% contaminants removal efficiency at a wide pH range (pH 5-9). The NMS dosage was found to be more important than NaClO dosage in the system, and long-term stability was observed in the presence of various salts.
SCIENCE OF THE TOTAL ENVIRONMENT
(2023)
Article
Nanoscience & Nanotechnology
Zifei Sun, Baichuan Wang, Matthew G. Boebinger, Alexandre Magasinski, Samik Jhulki, Yawei Zhang, Wenbin Fu, Matthew T. McDowell, Gleb Yushin
Summary: In this study, the performance of iron trifluoride (FeF3) in multiple types of ionic liquid (IL) electrolytes was significantly improved, particularly in terms of cycling stability at both room temperature and elevated temperatures. The IL electrolytes formed a protective and ionically conductive cathode electrolyte interphase (CEI) layer during cycling, reducing side reactions. Additionally, the ILs exhibited higher ionic conductivity and lower viscosity at elevated temperatures, enabling higher accessible capacity.
ACS APPLIED MATERIALS & INTERFACES
(2022)
Article
Energy & Fuels
Sumayya C. Pathan, Navajsharif S. Shaikh, Sawanta S. Mali, Jyoti V. Patil, Pranav K. Katkar, Navnath S. Padalkar, Supareak Praserthdam, Chang Kook Hong, Pongsakorn Kanjanaboos, Jasmin S. Shaikh
Summary: In this study, lanthanum-doped iron oxide-integrated graphene oxide (10%La-Fe2O3@GO) as an anode and beta-MnO2 as a cathode material were synthesized successfully through a simple hydrothermal method. The 10%La-Fe2O3@GO exhibited excellent electrochemical performance, attributed to the doping of rare earth La3+ metal ions, providing abundant active sites. The designed aqueous and quasi-solid state ionic liquid-based devices showed high energy density and good cyclability.
JOURNAL OF ENERGY STORAGE
(2022)
Article
Biochemistry & Molecular Biology
Varvara A. Drozd, Roman V. Ottenbacher, Konstantin P. Bryliakov
Summary: This study reports the asymmetric epoxidation of a series of olefinic substrates using sodium percarbonate oxidant in the presence of homogeneous catalysts based on Mn complexes with bis-amino-bis-pyridine ligands. The reaction proceeded with high yields and enantioselectivities, using low catalyst loadings. The epoxidation protocol is suitable for various types of substrates.
Article
Plant Sciences
Marcelo Pedrosa Gomes, Leticia Yoshie Kochi, Patricia Lawane Freitas, Cleber Cunha Figueredo, Philippe Juneau
Summary: The study found that the periphytic species S. elongatus and C. infusionum exhibit different tolerance levels to metals (Fe and Mn) and NaCl, with C. infusionum showing greater resistance to Fe and Mn. Both species showed metal removal efficiencies of 42% and 65%, and 53% and 79% in river water, respectively.
Article
Chemistry, Physical
Arijit Mitra, Jagabandhu Patra, Jeng-Kuei Chang, Subhasish B. Majumder, Siddhartha Das
Summary: This article investigates the electrochemical performance of amorphous sodium iron carbonophosphate in both organic and ionic-liquid based electrolytes. The results show that using ionic-liquids instead of organic electrolytes leads to superior cycling performance at room temperature and high temperature, with nearly fade-free electrochemical cells. The dense and ionically conductive protective film composed of anion-reduced moieties is responsible for the excellent high-temperature performance of amorphous sodium iron carbonophosphate with ionic-liquids.
JOURNAL OF POWER SOURCES
(2023)
Article
Engineering, Chemical
Xian-Tai Zhou, Ling-Ling Wang, Yang Li, Hong-Bing Ji
Summary: In this study, a direct liquid-phase propylene aerobic epoxidation protocol using chloride manganese meso-tetraphenylporphyrin catalyst was developed. The conversion of propylene reached 12.3%, and the selectivity towards propylene oxide was 80.5%. It was confirmed that the formation of propylene oxide occurred via high-valent manganese species.
CHINESE JOURNAL OF CHEMICAL ENGINEERING
(2022)
Article
Chemistry, Physical
The An Ha, Han Li, Xiaoen Wang, Luke A. O'Dell, Maria Forsyth, Cristina Pozo-Gonzalo, Patrick C. Howlett
Summary: The polymeric ionic liquid PDADMA TFSI was reported as a functional binder for Na-O-2 batteries with lower charge overpotential, enhancing the electrocatalytic activity of the electrode and resulting in NaO2 and Na2O2 as the major discharge products. PVDF and PTFE were also evaluated as binders, but PDADMA TFSI showed the best performance.
ACS APPLIED ENERGY MATERIALS
(2021)
Article
Chemistry, Physical
Shubham Kaushik, Kazuhiko Matsumoto, Yuki Orikasa, Misaki Katayama, Yasuhiro Inada, Yuta Sato, Kazuma Gotoh, Hideka Ando, Rika Hagiwara
Summary: This study investigates the performance of VP2 as a negative electrode alongside ionic liquids in sodium-ion batteries, revealing improved performance at intermediate temperatures and enhanced rate and cycle performance at 90 degrees C. Electrochemical tests show reduced charge transfer resistance and the formation of a uniform and stable solid electrolyte interface (SEI) layer at 90 degrees C. The conversion-based mechanism forming Na3P after charging is confirmed through X-ray diffraction and nuclear magnetic resonance spectroscopy.
JOURNAL OF POWER SOURCES
(2021)
Article
Chemistry, Multidisciplinary
Xu Gao, Liang Fang, HaoJi Wang, Suwon Lee, Huanqing Liu, Shu Zhang, Jinqiang Gao, Yu Mei, Mihui Park, Jing Zhang, Mingzhe Chen, Limin Zhou, Wentao Deng, Guoqiang Zou, Hongshuai Hou, Yong-Mook Kang, Xiaobo Ji
Summary: Fe-Mn based layered oxides are potential cathode materials for SIBs with high capacities and abundant ingredients. The capacity fading mechanism of these oxides is comprehensively investigated, revealing the role of Fe migration and structural distortion. The O3-P3 phase transition is constrained along with Fe migration, leading to intensified polarization and capacity loss. The capacity fading within the desodiation depth is dominantly rooted in Fe4+ activation and Mn-dissolution aggravated passivation. These findings provide insights for designing desirable cathodes for SIBs.
ADVANCED FUNCTIONAL MATERIALS
(2023)
Article
Chemistry, Multidisciplinary
Huatian Shi, Runhui Liang, David Lee Phillips, Hung Kay Lee, Wai-Lun Man, Kai-Chung Lau, Shek-Man Yiu, Tai-Chu Lau
Summary: In this study, a stable manganese(V) nitridocomplex was synthesized and its molecular structure and reactivity were investigated. The findings suggest that this complex exhibits high reactivity and can serve as a nitrene transfer reagent.
JOURNAL OF THE AMERICAN CHEMICAL SOCIETY
(2022)
Article
Chemistry, Physical
Sachind Prabha Padinhattath, Ramesh L. Gardas
Summary: Despite available conventional wastewater treatment techniques, an efficient method for removing micropollutants is still difficult to find. Micropollutants are trace chemicals in the aquatic environment, including pharmaceuticals, food additives, cosmetics, and dyes. The development of sustainable and cost-effective alternatives to eliminate these toxins has become urgent. Ionic liquids have emerged as a potential candidate for wastewater treatment due to their structure tunability and unique chemical properties. This study focuses on developing N-benzylethanolamine-based ionic liquids to remove diclofenac sodium, a priority pharmaceutical micropollutant, from water. The ILs were optimized using B3LYP theory and 6-311++G(d, p) basis set, and their interactions with diclofenac were investigated using the integral equation formalism polar continuum model (IEFPCM). Liquid-liquid extraction (LLE) method was used for experimental studies, and parameters affecting extraction efficiencies were optimized. The impact of hydrophobicity, hydrogen bonding, and 7C-7C interactions on ILs extraction efficiency was found to be significant.
JOURNAL OF MOLECULAR LIQUIDS
(2023)
Article
Engineering, Environmental
Gulsev Soysuren, Ayse Gul Yetgin, Ozgur Arar, Muserref Arda
Summary: Manganese is essential for human and animal health, but overexposure to it can be toxic. This study utilized ILIS and EDI processes to remove Mn2+ from aqueous solutions, with ILIS removal being pH dependent and reaching equilibrium in 20 minutes. EDI optimization led to efficient Mn2+ removal by adjusting applied potential and feed flow rate.
PROCESS SAFETY AND ENVIRONMENTAL PROTECTION
(2022)
Article
Chemistry, Multidisciplinary
Jireh Joy D. Sacramento, Therese Albert, Maxime Siegler, Pierre Moenne-Loccoz, David P. Goldberg
Summary: A new ferrous corrole complex [Fe-II(ttppc)](-) has been shown to bind dioxygen to form Fe-O-2, exhibiting an O-16/18(2)-isotope sensitive n(O-O) stretch at 1128 cm(-1) and a single n(Fe-O-2) at 555 cm(-1). This complex can mediate the dioxygenation of an indole derivative and extract hydrogen atoms from activated O-H bonds.
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
(2022)
Article
Environmental Sciences
Doleasha Davis, Rachael Simister, Sanjay Campbell, Melissa Marston, Suranjana Bose, Simon J. McQueen-Mason, Leonardo D. Gomez, Winklet A. Gallimore, Thierry Tonon
Summary: Massive strandings of pelagic brown algae Sargassum have occurred almost every year since 2011 in the Caribbean and western Africa, causing major environmental, health, and economic impacts in affected countries. A detailed comparative biochemical and elemental analysis of different pelagic Sargassum morphotypes revealed variations in chemical composition, with SnVIII displaying higher levels of phenolics and non-cellulosic polysaccharides.
SCIENCE OF THE TOTAL ENVIRONMENT
(2021)
Article
Chemistry, Inorganic & Nuclear
Debesh Sharma, Sagarmani Rasaily, Sajan Pradhan, Khanindram Baruah, Sudarsan Tamang, Anand Pariyar
Summary: MOFs are widely used in catalysis due to their robust structure and high porosity. Cu-3(BTC)(2)-MOF catalyst has been demonstrated to efficiently catalyze aziridination and ring-opening reactions, allowing for the direct formation of multiple bond structures in a single reactor.
INORGANIC CHEMISTRY
(2021)
Article
Chemistry, Physical
Sachidulal Biswas, Srijan Narayan Chowdhury, Panjo Lepcha, Achintesh Narayan Biswas
Summary: Electrochemical reduction studies of a mononuclear Cu(II) complex with a pentadentate amidate ligand resulted in the deposition of a heterogeneous film on the electrode. The formed FTO/Cu2O cathode showed efficient electrocatalytic proton reduction and maintained stability and high Faradaic efficiency in acidic medium.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2021)
Article
Crystallography
Sushobhan Ghosh, Sudip Sarkar, Satadal Paul, Suranjan Shil, Sudip Mohapatra, Achintesh Narayan Biswas, Gobinda Chandra De
Summary: This study demonstrates the construction of a charge transfer (CT) organic material with important electrical properties, where the charge transfer state is generated via delocalization through H-bonding interaction pathway. The reaction of simple organic molecule pyromellitic acid with orthophenylene diamine gives a colorless cocrystal 1', which undergoes a rare transition to an orange charge transfer state 1 in methanol water media over several days. The charge transfer state 1 shows semiconducting and fluorescent properties, with X-ray diffraction analysis revealing the formation of a charge separated extended H-bonded network responsible for the delocalization of charge in the system. This is the first example of constructing a donor-acceptor-based charge transfer material by tuning the H-bond distance of a colorless cocrystalline state with non-chalcogen and non-halogenated molecules.
CRYSTAL RESEARCH AND TECHNOLOGY
(2023)
Article
Chemistry, Inorganic & Nuclear
Panjo Lepcha, Sachidulal Biswas, Srijan Narayan Chowdhury, Suranjana Bose, Joyashish Debgupta, Satadal Paul, Achintesh N. N. Biswas
Summary: A Co(III)-hydroxo complex, [Co-III(dpaq)OH]ClO4 catalyses water oxidation with high efficiency and kinetics. The electrochemical results and theoretical calculations reveal the occurrence of both metal and ligand centered proton-coupled electron transfer processes during anodic scanning. The role of axial ligand in water oxidation has been examined and confirmed.
EUROPEAN JOURNAL OF INORGANIC CHEMISTRY
(2023)
Article
Chemistry, Inorganic & Nuclear
Sagarmani Rasaily, Khanindram Baruah, Debesh Sharma, Panjo Lepcha, Sachidulal Biswas, Achintesh Narayan Biswas, Sudarsan Tamang, Anand Pariyar
Summary: This study presents the hydrothermal synthesis of two novel Mn-based metal-organic frameworks (MOFs) and their conversion into manganese oxide-derived materials as cathode catalysts for the oxygen reduction reaction. These materials exhibit high catalytic activity and recyclability.
INORGANIC CHEMISTRY
(2023)
Article
Chemistry, Inorganic & Nuclear
Anand Pariyar, Debesh Sharma, Sagarmani Rasaily, Shivanand Chettri, Disha Sureka, Sudarsan Tamang
Summary: This study reports the synthesis of a novel 2D metal-organic framework with pre-existing unsaturated Lewis acid sites, which can be directly used for catalyzing organic transformations and synthesizing biologically active chiral imidazolidines. The material exhibits excellent reusability and high stereoselectivity.
INORGANIC CHEMISTRY
(2023)
Article
Engineering, Electrical & Electronic
Neha Jha, Anand Pariyar, Tahereh Sadat Parvini, Christian Denker, Pavan K. Vardhanapu, Gonela Vijaykumar, Arne Ahrens, Tobias Meyer, Michael Seibt, Nicolae Atodiresei, Jagadeesh S. Moodera, Swadhin K. Mandal, Markus Muenzenberg
Summary: Delocalized carbon-based radical species with unpaired spin have been used to fabricate Cu-PLY- and ZnPLY-based organic magnetic tunnel junctions. These junctions show nonlinear and weakly temperature-dependent current-voltage characteristics, indicating tunneling as the dominant transport mechanism. Cu-PLY-based OMTJs exhibit significant magnetoresistance due to the formation of hybrid states at the metal-molecule interfaces called spinterface, and also show stable voltage-driven resistive switching.
ACS APPLIED ELECTRONIC MATERIALS
(2023)
Article
Chemistry, Inorganic & Nuclear
Srijan Narayan Chowdhury, Sachidulal Biswas, Saikat Das, Achintesh N. Biswas
Summary: A pentadentate Cu(ii) complex catalyses the four-electron reduction of dioxygen by decamethylferrocene in the presence of trifluoroacetic acid. The use of stronger Bronsted acids inhibits the catalytic oxygen reduction. It is found that the strength of protonic acids increases significantly in acetone compared to that in dimethylformamide. Detailed kinetic studies reveal the mechanism of the reaction.
DALTON TRANSACTIONS
(2023)
Article
Chemistry, Inorganic & Nuclear
Sachidulal Biswas, Srijan Narayan Chowdhury, Panjo Lepcha, Subhankar Sutradhar, Abhishek Das, Tapan Kanti Paine, Satadal Paul, Achintesh N. Biswas
Summary: Generation of high-valent oxomanganese complexes through controlled removal of protons and electrons from low-valent congeners is a crucial step toward the synthesis of functional analogues of the native oxygen evolving complex (OEC). In this study, the electrochemical generation of non-heme oxomanganese (IV) species was achieved through a proton-coupled electron transfer process. The formation and properties of these high-valent oxomanganese complexes were investigated.
DALTON TRANSACTIONS
(2023)
Article
Chemistry, Physical
Bikram Gurung, Sajan Pradhan, Debesh Sharma, Deshaj Bhujel, Siddhant Basel, Shivanand Chettri, Sagarmani Rasaily, Anand Pariyar, Sudarsan Tamang
Summary: This study reports the synthesis of highly stable CsPbBr(3)QD based photocatalysts using dibromoisocyanuric acid (DBI) as a non-toxic bromide precursor. The QDs were used as a visible light photocatalyst for the intramolecular cyclisation reaction, resulting in the formation of enantiopure bioactive heterocycles with high yields. The reaction is simple, scalable, operates at room temperature, and exhibits a high catalytic efficiency and apparent quantum efficiency.
CATALYSIS SCIENCE & TECHNOLOGY
(2022)
Article
Chemistry, Multidisciplinary
Suranjana Bose, Rebecca D. Kirk, Harry Maslen, Martha A. Pardo Islas, Benedict Smith, Thomas I. J. Dugmore, Avtar S. Matharu
Summary: In this study, degreased coffee grounds were used as precursors to produce highly mesoporous activated carbons for efficient removal of manganese ions. The commonly used activating agent, ZnCl2, was replaced by benign and sustainable CaCl2 and K2CO3. The adsorption process followed pseudo-second order kinetics and was spontaneous.
Article
Chemistry, Multidisciplinary
Sajan Pradhan, Deshaj Bhujel, Bikram Gurung, Debesh Sharma, Siddhant Basel, Sagarmani Rasaily, Surakcha Thapa, Sukanya Borthakur, Wai Li Ling, Lakshi Saikia, Peter Reiss, Anand Pariyar, Sudarsan Tamang
Summary: Lead halide perovskite (LHP) based colloidal quantum dots (CQDs) show great potential as photocatalysts due to their exceptional optical properties. The halide-passivated, monodisperse CsPbBr(3)CQDs demonstrated improved stability and efficiency for organic transformations, with higher reaction rates and turnover numbers compared to other catalysts. This study suggests the practical applicability of energy-level tunable, size-controlled LHP CQDs in efficient photocatalysis for organic synthesis.
NANOSCALE ADVANCES
(2021)
Article
Chemistry, Inorganic & Nuclear
Karishma Bhardwaj, Sajan Pradhan, Siddhant Basel, Mitchell Clarke, Beatriz Brito, Surakcha Thapa, Pankaj Roy, Sukanya Borthakur, Lakshi Saikia, Amit Shankar, Graeme J. Stasiuk, Anand Pariyar, Sudarsan Tamang
DALTON TRANSACTIONS
(2020)
