Article
Chemistry, Multidisciplinary
Eliezer Ortiz, Jonathan Z. Shezaf, Weijia Shen, Michael J. Krische
Summary: This article provides an overview of ruthenium-catalyzed hydrogen auto-transfer reactions for the direct enantioselective conversion of lower alcohols to higher alcohols. These processes offer atom-efficient carbonyl addition without the need for premetalated reagents or metallic reductants. The applications in target-oriented synthesis are emphasized, along with a brief historical perspective on ruthenium-catalyzed hydrogen transfer processes.
Article
Chemistry, Multidisciplinary
Honghui Gong, Juan Zhang, Qi Li, Mengmeng Du, Shuangshuang Liu, Lijuan Jiang, Xian-Lei Shi
Summary: In this study, a highly dispersed Cu catalyst supported on H3PO4-activated coffee biochar (Cu/PBCR-600) is reported to selectively reduce nitroaromatics to corresponding aromatic amines. The Cu/PBCR-600 catalyst exhibits significantly higher TOF values compared to previously reported non-noble and even noble metal catalysts and shows high stability in catalytic recycles. The characterization and activity tests indicate that Cu-0 in Cu/PBCR-600 acts as the active site for the reduction of nitroaromatics, and N, P co-doped coffee biochar selectively adsorbs and activates the nitro group of nitroaromatics.
Article
Chemistry, Inorganic & Nuclear
Richard J. Citta, Brandon L. Koteles, Brenda Delgado-Perez, Benny C. Chan, Steven E. Kalman
Summary: Two half-sandwich ruthenium(II) complexes of an imidazole-2-carboxamido ligand were synthesized and characterized, serving as precatalysts for base-free transfer hydrogenation under aerobic conditions. A substrate scope study with ketones and aldehydes was conducted, along with a preliminary investigation of the catalytic mechanism. These complexes are rare examples of transfer hydrogenation catalysts that do not require an inert atmosphere and an exogenous base.
Article
Chemistry, Inorganic & Nuclear
Huanshi Lan, Zuzeng Qin, Shaolin Shi, Xingcong Zhang, Xiaohui He, Hongbing Ji
Summary: Atomically dispersed Pt species supported on Fe2O3 (Pt1/Fe2O3) are successfully constructed via a simple ball milling process. Pt1/Fe2O3 exhibits excellent selectivity and conversion rate in the selective hydrogenation of cinnamaldehyde (CAL) in pure water medium, attributed to its superior dissociation ability of H-2 and preferential adsorption of CAL via C=O.
DALTON TRANSACTIONS
(2022)
Article
Chemistry, Multidisciplinary
Maurizio Ballico, Dario Alessi, Christian Jandl, Denise Lovison, Walter Baratta
Summary: This paper reports a one-pot synthesis method for the cationic chiral diphosphine ruthenium complexes, which exhibit good catalytic activity and enantioselectivity in photocatalytic transfer hydrogenation reactions.
CHEMISTRY-A EUROPEAN JOURNAL
(2022)
Article
Chemistry, Organic
Dang Binh Ho, Samantha Gargaro, Raphael K. Klake, Joshua D. Sieber
Summary: In this work, a modified catalytic system utilizing a commercially available Cu-phosphite catalyst is developed for the diastereoselective reductive coupling of chiral allenamides and ketones to afford chiral gamma-lactone precursors with asymmetric ratios ranging from 80:20 to 99:1.
JOURNAL OF ORGANIC CHEMISTRY
(2022)
Article
Chemistry, Physical
Xiuli Li, Yuan Tan, Zongyang Liu, Juan Su, Yan Xiao, Botao Qiao, Yunjie Ding
Summary: This study reports the fabrication of nickel oxide promoted copper catalysts for the chemoselective hydrogenation of aromatic nitro compounds. The strong interaction between copper and nickel contributes to the high activity and selectivity of the supported Cu-Ni bimetal catalyst system. The findings provide insights into the interaction between copper and nickel oxides and aid in the development of efficient non-noble metal catalysts for the selective hydrogenation of aromatic nitro compounds.
JOURNAL OF CATALYSIS
(2022)
Article
Chemistry, Applied
Mateus U. C. Braga, Gabriel H. Perin, Leonardo H. de Oliveira, Pedro A. Arroyo
Summary: The study identified Ni-Y zeolite as having potential for selective removal of H2S from natural gas, despite Co-Y zeolite presenting stronger adsorption energies for all compounds. NBO and EDA analysis revealed contributions of chemical hardness, electron transfer, and polarization to the adsorption energies of H2S, COS, and CO2 in transition metal-exchanged Y zeolite clusters.
MICROPOROUS AND MESOPOROUS MATERIALS
(2022)
Article
Chemistry, Inorganic & Nuclear
Jian Wang, Qingrun Meng, Qijian Zhang
Summary: This study presents a facile aerosol-assisted method to synthesize mesoporous Cu/ZnO-ZrO2 catalysts, which exhibit superior thermal and photothermal performance for CO2 reduction to methanol. The process involves the formation of an aerosol from Zn and Zr precursors and a surfactant solution, followed by fast drying to obtain uniform nanoparticles and calibrated mesopores. The resulting Cu/ZnO-ZrO2 catalyst shows high activity, with high TOFCu values and superior methanol yields and selectivity. The study provides new insight into the fabrication of composite mesoporous oxide as a promising photothermal catalyst.
DALTON TRANSACTIONS
(2023)
Article
Chemistry, Multidisciplinary
Mengqi Shen, Christoph Bendel, Hunter B. B. Vibbert, Pan Thi Khine, Jack R. R. Norton, Aaron J. J. Moment
Summary: A continuous-flow strategy using ammonia borane as the hydrogen source and Pd/C catalyst has been developed for efficient tandem nitro-reduction reactions. This strategy achieves full conversion of nitrobenzene to highly pure aniline in just 15 seconds, with only air cooling needed.
Article
Chemistry, Multidisciplinary
Tianyi Chen, Christopher Foo, Jianwei J. W. Zheng, Huihuang Fang, Peter Nellist, Shik Chi Edman Tsang
Summary: It has been recently discovered that doping light elements such as lithium, boron, and carbon into supported transition metals can fill interstitial sites, improving reaction selectivity. In the study, it was found that substitutional doping of platinum with lithium leads to cell contraction and enables highly selective catalytic hydrogenation by electron donation.
CHEMISTRY-A EUROPEAN JOURNAL
(2021)
Article
Chemistry, Multidisciplinary
Ziyang Zhang, Zhong-Li Wang, Kang An, Jiaming Wang, Siran Zhang, Pengfei Song, Yoshio Bando, Yusuke Yamauchi, Yuan Liu
Summary: This study demonstrates a method to tune the ratio of Cu+/Cu-0 and stabilize Cu+ in Cu/Ti-SiO2 catalysts, promoting the efficient hydrogenation of esters. Reversible Ti-O-Cu bonds greatly enhance the activity and stability of the catalysts, achieving high conversion and selectivity with long-term stability.
Article
Chemistry, Multidisciplinary
Yazhou Zhang, Shaoqi Zhan, Kunlong Liu, Mengfei Qiao, Ning Liu, Ruixuan Qin, Liangping Xiao, Pengyao You, Wentong Jing, Nanfeng Zheng
Summary: In this study, a Pd nanoparticles catalyst supported on hexagonal boron nitride (h-BN) was developed for the hydrogenation of aldehydes/ketones to alcohols via hydrogen spillover. The feasibility of hydrogen spillover from Pd to h-BN is determined by the nitrogen vacancies in h-BN. The hydrogen spillover-based hydrogenation mechanism leads to a high tolerance to CO poisoning for the catalyst system.
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
(2023)
Article
Chemistry, Physical
Olumide Bolarinwa Ayodele
Summary: This study investigates the impact of oxalate and borohydride ligands functionalization on the properties and activity of zeolite Y-supported copper nanoparticles in CO2 hydrogenation. The functionalization resulted in differences in physicochemical properties and activity, with oxalate showing higher methanol yield and borohydride showing higher dimethyl ether yield. Additionally, the functionalization effectively minimized CO formation.
APPLIED CATALYSIS B-ENVIRONMENTAL
(2022)
Article
Chemistry, Multidisciplinary
Mi Yeon Byun, Man Sig Lee
Summary: Hierarchical porous carbon (HPC) was prepared using colloidal silica of different sizes as a template for Pt nanoparticles, with Pt dispersion varying with the pore size and structure of the HPC supports. The HPC supports with large pores showed higher furfural conversion and 1-pentanol selectivity, while those with small pores exhibited higher furfuryl alcohol selectivities. The solvent's effect on furfural hydrogenation was also investigated, with the solubility of H-2 in the solvent affecting the furfural conversion and product selectivity.
JOURNAL OF INDUSTRIAL AND ENGINEERING CHEMISTRY
(2021)
Article
Chemistry, Multidisciplinary
Devenderan Ramanathan, Kayambu Namitharan, Kasi Pitchumani
CHEMICAL COMMUNICATIONS
(2016)
Article
Chemistry, Multidisciplinary
Raihana Imran Khan, Kasi Pitchumani
Article
Plant Sciences
Suresh V. Nampoothiri, A. Nirmala Menon, T. Esakkidurai, K. Pitchumani
JOURNAL OF ESSENTIAL OIL BEARING PLANTS
(2016)
Article
Chemistry, Physical
Basuvaraj Suresh Kumar, Arlin Jose Amali, Kasi Pitchumani
JOURNAL OF MOLECULAR CATALYSIS A-CHEMICAL
(2016)
Article
Chemistry, Applied
Raja Radha, Vairathevar Sivasamy Vasantha, Kasi Pitchumani
NATURAL PRODUCT RESEARCH
(2016)
Article
Chemistry, Multidisciplinary
Palanichamy Kaleeswaran, Thanasekaran Nandhini, Kasi Pitchumani
NEW JOURNAL OF CHEMISTRY
(2016)
Article
Chemistry, Analytical
Thanasekaran Nandhini, Palanichamy Kaleeswaran, Kasi Pitchumani
SENSORS AND ACTUATORS B-CHEMICAL
(2016)
Article
Chemistry, Multidisciplinary
Raihana Imran Khan, Kasi Pitchumani
Article
Chemistry, Multidisciplinary
Basuvaraj Suresh Kumar, Arlin Jose Amali, Kasi Pitchumani
ACS SUSTAINABLE CHEMISTRY & ENGINEERING
(2017)
Article
Chemistry, Organic
Basuvaraj Suresh Kumar, Rajagopal Anbarasan, Arlin Jose Amali, Kasi Pitchumani
TETRAHEDRON LETTERS
(2017)
Article
Chemistry, Multidisciplinary
Basuvaraj Suresh Kumar, Pillaiyar Puthiaraj, Arlin Jose Amali, Kasi Pitchumani
ACS SUSTAINABLE CHEMISTRY & ENGINEERING
(2018)
Article
Chemistry, Multidisciplinary
Natarajan Madankumar, Kasi Pitchumani
Article
Chemistry, Physical
Basuvaraj Suresh Kumar, Arlin Jose Amali, Kasi Pitchumani
MOLECULAR CATALYSIS
(2018)
Article
Chemistry, Organic
Devenderan Ramanathan, Kasi Pitchumani
EUROPEAN JOURNAL OF ORGANIC CHEMISTRY
(2015)
Article
Chemistry, Multidisciplinary
Basuvaraj Suresh Kumar, Kasi Pitchumani
Article
Chemistry, Physical
Zi-Ye Liu, Qian-Yu Wang, Ji-Ming Hu
Summary: In this study, a layered carbon dot composite catalyst (NiFe LDH@CDs) was prepared using a one-step coprecipitation method, without the need for heating or hydrothermal treatment. The CD-functionalized catalyst facilitated rapid charge transfer and accelerated the oxygen evolution reaction. Additionally, the heterojunction structure formed between NiFe LDH and CDs efficiently suppressed photoelectron-hole recombination.
CATALYSIS SCIENCE & TECHNOLOGY
(2024)
Article
Chemistry, Physical
Rohit Kumar, Ankit Kumar Srivastava, Palaniyappan Nagarasu, Vedichi Madhu, Ekambaram Balaraman
Summary: We designed and synthesized a NN-CoII bidentate complex and used it for the amination of alcohols under mild and solventless conditions. The complex exhibited good reactivity towards both primary and sterically hindered secondary alcohols, providing high yields of amines. The pyrazole moiety in the ligand played a crucial role in the reaction. Furthermore, we demonstrated the reusability of the complex as a homogeneous cobalt catalyst.
CATALYSIS SCIENCE & TECHNOLOGY
(2024)
Article
Chemistry, Physical
Shivanand Chettri, Liang-Ting Wu, Sagarmani Rasaily, Debesh Sharma, Bikram Gurung, Rajani Dewan, Sudarsan Tamang, Jyh-Chiang Jiang, Anand Pariyar
Summary: Replicating the enzymatic surface microenvironment in vitro is challenging, but constructing an analogous model could facilitate our understanding of surface effects and aid in developing an efficient bioinspired catalytic system. In this study, five unique Cu2O morphologies were generated, and the surface morphology variations were found to be a consequence of differences in the exposure of low-index facets. The reactivity of Cu2O was found to be influenced by the proportion of {110} planes, with r-Cu2O exhibiting the highest reactivity.
CATALYSIS SCIENCE & TECHNOLOGY
(2024)
Article
Chemistry, Physical
Yong Tang, Jianhao Qiu, Dingliang Dai, Guanglu Xia, Lu Zhang, Jianfeng Yao
Summary: Defect engineering has been shown to improve the photocatalytic performance. This study investigated the use of defect-rich UiO-66-NH2 wrapped by ZnIn2S4 as a catalyst for photocatalytic H2O2 production. The defects in UiO-66-NH2 enhanced O-2 adsorption and charge separation, leading to higher H2O2 yield. The insights from this work can advance the research in defect engineering of MOFs and photocatalytic H2O2 synthesis.
CATALYSIS SCIENCE & TECHNOLOGY
(2024)
Article
Chemistry, Physical
Ruiyang Qu, Shuxin Mao, Jana Weiss, Vita A. Kondratenko, Evgenii V. Kondratenko, Stephan Bartling, Haifeng Qi, Annette-Enrica Surkus, Kathrin Junge, Matthias Beller
Summary: The hydrogenation of amides, a challenging reaction usually performed at high temperatures, has been achieved under milder conditions using a new Pt-MoOx/TiO2 catalyst. This catalyst system enables the selective hydrogenation of various amides and imides.
CATALYSIS SCIENCE & TECHNOLOGY
(2024)
Article
Chemistry, Physical
Xiaoran Niu, Ao Wang, Lei Tong, Lei Wang, Yuan Kong, Chenliang Su, Hai-Wei Liang
Summary: This study introduces a novel intermetallic PdCu3 catalyst supported on defective nanodiamond-graphene (ND@G), which exhibits high selectivity (95%) and remarkable activity (turnover frequency: 2940 h(-1)), six times higher than that of the commercial Lindlar catalyst.
CATALYSIS SCIENCE & TECHNOLOGY
(2024)
Review
Chemistry, Physical
Zhiyuan Zheng, Yiming Yue, Hongying Zhuo, Qinggang Liu, Yanqiang Huang
Summary: This review presents the recent research advances on single-atom catalysis for deep reduction of CO2. Detailed introductions and summaries were classified into three categories based on proton-coupled multi-electron transfer approaches: strengthening metal-support interaction, rational design and regulation of coordination environment, and development of SACs with multi-atom active sites. The challenges and future research directions in the field of SACs for CO2 reduction are also proposed.
CATALYSIS SCIENCE & TECHNOLOGY
(2024)
Article
Chemistry, Physical
Shiv Kumar, Paramita Datta, Anup Bhunia, Swadhin K. Mandal
Summary: This article reports a transition-metal-free process for in situ denitrogenation of tosylhydrazones, resulting in the production of various sulfones. The authors used a phenalenyl-based odd alternant hydrocarbon as a photoredox catalyst, which acted as a potent oxidant to facilitate the denitrogenation reaction. The method showed wide functional-group tolerance and high yields, making it suitable for late-stage modification of natural products.
CATALYSIS SCIENCE & TECHNOLOGY
(2024)
Article
Chemistry, Physical
L. A. Luque-Alvarez, J. Gonzalez-Arias, F. Romero-Sarria, T. R. Reina, L. F. Bobadilla, J. A. Odriozola
Summary: Currently, the production of acetic acid through the carbonylation reaction of methanol has limitations, leading to the exploration of alternative methods using heterogeneous catalysts. This study investigates the methanol carbonylation reaction over a Cu-H-MOR catalyst and proposes a reaction mechanism based on the catalytic behavior and performance of the catalyst. The results provide insights into the reaction mechanism and the involvement of acid and redox centers.
CATALYSIS SCIENCE & TECHNOLOGY
(2024)