Article
Environmental Sciences
Jin Wang, Jihui Zhang, Yahui Song, Xianmang Xu, Mengyun Cai, Peichuang Li, Wenpeng Yuan, Yujiao Xiahou
Summary: In this research, a highly recyclable catalyst of Ag-based agarose hydrogel was successfully fabricated through a simple reduction method. The hydroxyl functional groups in agarose effectively control the growth and dispersion of Ag nanoparticles in the hydrogel, ensuring the reusability of the catalyst. The hydrogel showed great potential as a catalyst for reducing aromatic organic pollutants, achieving high conversion rates and efficient reduction of various pollutants.
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
(2023)
Article
Chemistry, Multidisciplinary
Qi Wang, Zhongxia Shang, Haiyan Wang, Alexander Wei
Summary: Colloidal Ag particles decorated with Fe3O4 islands can be activated as inverse catalysts for C(sp(2))-H heteroarylation either electrochemically or photochemically. The silver-iron oxide (SIO) particles are reduced into redox-active forms by cathodic charging at mild potentials or short-term light exposure, and can be reused multiple times by magnetic cycling without further activation. The reduction peak shift is attributed to the overpotential produced by surface Fe3O4, which separates residual Ag ions or clusters from bulk silver. The catalytic efficiency of SIO is maintained even with acid degradation, and can be counteracted by simple addition of water to the reaction medium.
Article
Materials Science, Multidisciplinary
Nathaniel E. Larm, Anders J. Gulbrandson, Christopher D. Stachurski, Mary A. Chase, Paul C. Trulove, David P. Durkin
Summary: Silver nanoparticles (AgNPs) are used as robust catalysts to reduce 4-nitrophenol using sodium borohydride. The nanoparticles are retained within a nonderivatized, mesoporous, all-cellulose NFW composite and show no leaching or significant loss of activity. Furthermore, the combustion of AgNPs-NFW composites produces distinct Ag residues, making it viable for producing metal sponges from monometallic and bimetallic NPs.
MACROMOLECULAR MATERIALS AND ENGINEERING
(2023)
Article
Chemistry, Multidisciplinary
Rajkumar Kore, Anand D. Sawant, Robin D. Rogers
Summary: In an effort to overcome limitations in using ionic liquids (ILs) as homogeneous catalysts, a heterogeneous analog was prepared by loading [HN222][Al2Cl7] onto Fe3O4 nanoparticles. The catalyst showed excellent performance in the alkylation of benzene with benzyl chloride and could be recycled multiple times without loss of catalytic activity.
ACS SUSTAINABLE CHEMISTRY & ENGINEERING
(2021)
Article
Chemistry, Inorganic & Nuclear
Mona Hamelian, Kambiz Varmira, Hojat Veisi
Summary: The present study successfully synthesized a novel magnetic nanocatalyst that can efficiently reduce organic dyes. The catalyst was thoroughly characterized using various techniques, and it was found that the catalyst can reduce different organic dyes in the presence of NaBH4 at room temperature. UV-Vis spectroscopy revealed that the reduction reaction follows pseudo-first-order kinetics. Additionally, the synthesized catalyst can be collected using a magnet and reused multiple times.
INORGANIC CHEMISTRY COMMUNICATIONS
(2023)
Article
Chemistry, Physical
Hao Sun, Chenzhe Xu, Xiaoting Yang, Lei Tao, Zheng Wang, Haitao Zhang, Xiang Ji, Juanjuan Ma, Lin Liu, Zhiwei Tong, Zhong Chen
Summary: A novel composite Pd@MgAl-LDH was prepared by using MgAl layered double hydroxide (LDH) as the host material and assembling the precursor (PdCl42-) with exfoliated LDH nanosheets followed by in-situ reduction. The heterogeneous catalyst exhibited evenly distributed Pd NPs with an average particle size of about 3.27 nm supported on LDH nanosheets. The Pd@MgAl-LDH catalyst showed excellent catalytic efficiency for the Heck reaction and could be reused 5 times without significant loss of catalytic activity.
APPLIED CLAY SCIENCE
(2023)
Article
Chemistry, Multidisciplinary
Jialei Du, Daili Xiang, Jie Chen, Hehuan Xia, Leichen Wang, Fushan Liu, Yiwei Zhao, Yuanyuan Zhang, Caixia Xu, Bin Wang
Summary: Nanoporous PdCu (NP-PdCu) is a competent self-supported heterogeneous catalyst prepared from a PdCuAl alloy precursor, suitable for Suzuki-Miyaura cross-coupling with high efficiency and yields, and can be reused multiple times without obvious loss of catalytic performance.
CHEMICAL COMMUNICATIONS
(2021)
Article
Chemistry, Physical
Carlos Lizandara-Pueyo, Xinyuan Fan, Carles Ayats, Miquel A. Pericas
Summary: This study involved the controlled synthesis of calcium carbonate particles surface-functionalized with azido groups, followed by copper-catalyzed alkyne-azide cycloaddition reactions to prepare novel catalytic materials. The immobilized catalyst demonstrated high selectivity and efficiency in catalyzing Michael addition reactions of aldehydes, with the added advantage of being reusable and adaptable to continuous-flow operation for increased productivity.
JOURNAL OF CATALYSIS
(2021)
Article
Chemistry, Multidisciplinary
Krishna Manna, Basuvaraj Suresh Kumar, Tanmoy Maity, Srinivasan Natarajan
Summary: Two new isostructural inorganic coordination polymers were prepared and used as catalysts for the reduction of nitroarenes and activation of chloroarenes. The catalysts showed good catalytic activity and recyclability under solvent-free or environmentally friendly conditions.
Article
Chemistry, Multidisciplinary
Neha Sharma, Sunil Kumar, Venugopala R. Battula, Anu Kumari, Arkaprabha Giri, Abhijit Patra, Kamalakannan Kailasam
Summary: The heptazine-based microporous polymeric network HMP-TAPA demonstrates high surface area and broad visible-light absorption, making it an efficient metal-free photocatalyst and base catalyst with outstanding conversion and robustness.
CHEMISTRY-A EUROPEAN JOURNAL
(2021)
Article
Biotechnology & Applied Microbiology
Xiaojuan Li, Jun Natsuki, Toshiaki Natsuki
Summary: By synthesizing AgNPs/GO nanoscroll composites, a recyclable photocatalyst was achieved for efficient degradation of dye wastewater pollutants with good recyclability.
ENVIRONMENTAL TECHNOLOGY & INNOVATION
(2021)
Article
Chemistry, Multidisciplinary
Jim Secka, Arpan Pal, Francis A. Acquah, Blaine H. M. Mooers, Anand B. Karki, Dania Mahjoub, Mohamed K. Fakhr, David R. Wallace, Takuya Okada, Naoki Toyooka, Adama Kuta, Naga Koduri, Deacon Herndon, Kenneth P. Roberts, Zhiguo Wang, Bethany Hileman, Nisha Rajagopal, Syed R. Hussaini
Summary: This paper describes a method for synthesizing enamino carbonyl compounds using copper (I) catalysis, and applies this method to synthesize analogs of indolizidine (-)-237D. In addition, binding studies and preliminary pharmacokinetic analysis were conducted. Furthermore, screening for antimicrobial properties of enamino carbonyl compounds was performed.
Article
Chemistry, Multidisciplinary
Zsuzsanna Feher, Johanna Kiss, Peter Kisszekelyi, Janos Molnar, Peter Huszthy, Levente Karpati, Jozsef Kupai
Summary: Chemical depolymerisation is a sustainable plastic recycling method that can achieve a circular economy by recovering pure monomers. In this study, commercially available organocatalyst-modified silica gels and functionalized silica gel were tested for the glycolysis of PET. The reaction was optimized and the recyclability of the catalysts was evaluated. The results showed that the modified silica gels had higher catalytic activities and achieved a high yield of monomers, making them a promising solution for PET waste management.
Article
Polymer Science
Samson Lalhmangaihzuala, Zathang Laldinpuii, Chhakchhuak Lalmuanpuia, Khiangte Vanlaldinpuia
Summary: In this study, a biomass-waste-derived heterogeneous catalyst was prepared from waste orange peel for the depolymerisation of PET to its monomer, BHET. The catalyst showed excellent catalytic performance, depolymerising PET within 90 minutes and producing 79% recrystallised BHET. The ability to reuse the catalyst for multiple cycles without significant loss of activity and its environmentally-friendly nature make it a promising green route for PET recycling.
Article
Chemistry, Applied
Peng Xu, Zhenguo Wu, Wei Dai, Yang Wang, Mengke Zheng, Xiaodan Su, Zhaogang Teng
Summary: This study presents a soft-to-hard templating approach for the synthesis of multiple Ag nanoparticles loaded hollow mesoporous carbon spheres (Ag@HMCSs). The method offers advantages such as simple and efficient preparation, excellent catalytic activity, and stability of the prepared Ag@HMCSs.
MICROPOROUS AND MESOPOROUS MATERIALS
(2021)
Article
Chemistry, Physical
Manjunath S. Lokolkar, Manoj K. Pal, Sandip Dey, Bhalchandra M. Bhanage
Summary: In this study, a new palladium complex was synthesized and used as a catalyst for the synthesis of oxygen-containing heterocyclic flavones. The synthesized complex was characterized and found to remain active even at low loading.
Article
Chemistry, Organic
Tejas A. Gokhale, Sanjivani C. Gulhane, Bhalchandra M. Bhanage
Summary: This study explores the utilization of bio-derived feedstocks in the catalyst-free oxidative synthesis of N-formamides. The results reveal that 1,3-dihydroxyacetone and glyoxal have the best carbon efficiency and can be used to synthesize a library of N-formamides. The methodology has demonstrated high yields in both laboratory and pilot scale.
EUROPEAN JOURNAL OF ORGANIC CHEMISTRY
(2023)
Article
Chemistry, Applied
Vijay P. Mahajan, Yuvraj A. A. Kolekar, Bhalchandra M. M. Bhanage
Summary: This study presents a magnetically separable nickel catalyst supported on Fe3O4 for phenoxy carbonylation reactions to synthesize aryl esters. The use of o-chlorophenyl formate as a CO source and phenol as a coupling partner, along with the inexpensive nickel catalyst, are the main advantages of this method. The Ni/Fe3O4 catalyst showed excellent magnetic separability due to the superparamagnetic nature of Fe3O4 and could be reused for up to eight cycles with minimal drops in yield. The protocol demonstrated tolerance towards various functionalities of aryl iodides and provided moderate to good yields of the corresponding esters. The prepared Ni/Fe3O4 nanoparticles were characterized using analytical techniques such as FESEM, EDS, TEM, XRD, ICP-OES, and XPS.
APPLIED ORGANOMETALLIC CHEMISTRY
(2023)
Article
Materials Science, Multidisciplinary
Tejas A. Gokhale, Tejashri J. Sarda, B. Bhalchandra M. Bhanage
Summary: This study reports on the sunlight driven rapid photodegradation of Crystal Violet using Magnesium doped Zinc oxide nanostructures. Among them, 5% Mg-ZnO showed exceptional photocatalytic performance with the highest kinetic rate constant. Under optimized conditions, 30 mg of 5% Mg-ZnO exhibited >85% photodegradation efficiency of 10 ppm of Crystal Violet in a short period of time.
MATERIALS CHEMISTRY AND PHYSICS
(2023)
Article
Chemistry, Multidisciplinary
Yuvraj A. Kolekar, Vitthal B. Saptal, Bhalchandra M. Bhanage
Summary: This study successfully developed a catalyst with controllable activity and selectivity by combining mesoporous silica and N-rich melamine dendron through covalent grafting. The catalyst exhibited excellent catalytic activity for the oxidative carbonylative self-coupling reaction using N-formyl saccharin as a sustainable solid CO source and Cu as a co-catalyst.
CHEMISTRY-A EUROPEAN JOURNAL
(2023)
Article
Chemistry, Multidisciplinary
Priyanka Jawale, Bhalchandra M. Bhanage
Summary: In this study, the synthesis of decanoate esters using immobilized lipase in deep eutectic solvent was investigated, and a suitable kinetic model was proposed. The best combination of DES and lipase for synthesizing propyl decanoate was found to be Gly:ChCl and Cal B, respectively. Response surface methodology was used to optimize reaction variables, and the activation energy was determined to be 14.59 kcal/mol. The study also showed that biocatalysts could be recycled for up to four cycles, and the reaction mechanism followed the Ping Pong Bi Bi mechanism. Molecular docking confirmed the acylation of the active site serine residue and strong hydrogen bonding between the substrate and active site.
JOURNAL OF THE INDIAN CHEMICAL SOCIETY
(2023)
Article
Chemistry, Organic
Satish M. Chauhan, Bhalchandra M. Bhanage
Summary: In this study, a catalyst-free synthesis method for quinazolinones using formic acid as a C1 source in the presence of triethylamine was developed. This simple and efficient approach provides a promising alternative to conventional routes and offers a sustainable solution for synthesizing quinazolinone derivatives.
TETRAHEDRON LETTERS
(2023)
Article
Chemistry, Organic
Kasturi U. Nabar, Bhalchandra M. Bhanage, Sudam G. Dawande
Summary: An efficient, inexpensive, and environment-friendly method using copper sulfate as a catalyst and water as a green solvent has been developed for the N-arylation of amines with 1,3-cyclohexadione-derived aryliodonium ylides. Aromatic primary amines substituted with electron-donating or electron-withdrawing groups reacted smoothly, yielding diarylamines with good to excellent yields. Secondary amines also underwent N-arylation to give tertiary amines with moderate yields.
BEILSTEIN JOURNAL OF ORGANIC CHEMISTRY
(2023)
Article
Chemistry, Physical
Vijay P. Mahajan, Yuvraj A. Kolekar, Bhalchandra M. Bhanage
Summary: This work presents a novel method for the synthesis of diaryl ketones through carbonylative homo-coupling reactions using a nickel catalyst supported on Al2O3. A heterogeneous Ni/Al2O3 catalyst was prepared and employed for the reaction of aryl iodides under carbon monoxide gas-free conditions. Good to excellent yields of symmetrical diaryl ketones were obtained using Co-2(CO)(8) as a carbon monoxide source. The catalyst demonstrated high stability with no significant loss of activity after five consecutive cycles.
Article
Chemistry, Physical
Tejas A. Gokhale, Prafull A. Jagtap, Bhalchandra M. Bhanage
Summary: This work presents a synthetic protocol for the synthesis of N-formamides using iron-based catalysis with magnetic Fe powder as the catalyst, achieving high yields and catalyst reusability.
Article
Chemistry, Multidisciplinary
Yuvraj A. A. Kolekar, Bhalchandra M. M. Bhanage
Summary: An efficient Pd/Cu-catalyzed self-carbonylation of arylhydrazines with CO and molecular oxygen has been developed, resulting in the synthesis of symmetrical biaryl ketones through C-N bond activation. The use of arylhydrazine hydrochlorides as green arylating agents allows for the release of nitrogen and water as byproducts. This protocol successfully suppresses the formation of aryl iodides and homo-coupled azobenzenes, even under favorable conditions, and allows for the synthesis of a library of symmetrical biaryl ketones with various functional groups in good yields under mild conditions.
CHINESE JOURNAL OF CHEMISTRY
(2023)
Article
Chemistry, Organic
Prafull A. Jagtap, Manjunath S. Lokolkar, Bhalchandra M. Bhanage
Summary: A simple, cost-effective, and straightforward method for the synthesis of 2,3-disubstituted indole scaffolds was developed. The reaction involves copper-mediated tandem hydroamination followed by C-H annulation of unprotected anilines with internal alkynes. The reaction proceeds well with Cu(OAc)(2)& BULL;H2O and trifluoroacetic acid (TFA), providing various substituted indole derivatives in moderate to good yields. The process is compatible with primary and secondary anilines as well as aromatic/aliphatic alkynes. High-purity copper nanoparticles can be recovered after the reaction, demonstrating the cost-effectiveness and environmentally benign nature of the protocol.
JOURNAL OF ORGANIC CHEMISTRY
(2023)
Editorial Material
Chemistry, Multidisciplinary
Bhalchandra M. Bhanage
JOURNAL OF THE INDIAN CHEMICAL SOCIETY
(2023)
Article
Chemistry, Organic
Manjunath S. Lokolkar, Bhalchandra M. Bhanage
Summary: In this study, a palladium-catalyzed carbonylative synthesis method was developed for the one-pot synthesis of symmetrical xanthones. The protocol is simple, ligand- and additive-free, and provides moderate to good yields of the target compounds. It can also be extended for the synthesis of related derivatives.
Article
Chemistry, Multidisciplinary
Yuvraj A. Kolekar, Bhalchandra M. Bhanage
Summary: In this study, Pd/C-catalyzed oxidative aminocarbonylation and alkoxycarbonylation of unactivated aryl hydrazines were reported. This protocol provides a promising, simple, and effective approach for preparing esters and tertiary amides using environmentally benign solvent and recyclable catalyst.
NEW JOURNAL OF CHEMISTRY
(2022)
