Results 81 to 90 of about 1,169,661 (308)

Acetoxylation of Propylenewith Metallic Palladium and Palladium Salt Catalysts

The Journal of the Society of Chemical Industry, Japan, 1969
活性炭,γ-アルミナを担体として,金属パラジウム触媒およびパラジウム塩触媒によるプロピレンのアセトキシル化反応を行ない,金属パラジウム,パラジウム塩の触媒作用および反応機構の研究を行なった。生成物は,パラジウム塩触媒の場合,アセトン, 酢酸イソプロペニル, 酢酸アリルおよび二酸化炭素であり, 金属パラジウム触媒の場合, 酢酸アリルと二酸化炭素であった。触媒による選択性の違いは,反応中間体がパラジウム塩触媒の場合π-錯体であり,金属パラジウム触媒の場合はπ-アリル錯体によるものと考えられる。アセトンは酢酸イソプロペニルの加水分解反応による逐次反応で生成することが判った。活性炭を担体とした触媒では, 酢酸が燃焼し二酸化炭素になり, 金属パラジウム-γ-アルミナ触媒ではプロピレンが燃焼し二酸化炭素となる。
Hiromichi ARAI, Shinji KOJIMA, Kaoru FUJIMOT, Taiseki KUNUGI   +3 more
openaire   +2 more sources

Solvent‐Free Thermal Defect Engineering in Molecular Frameworks With Volatile Linkers

Advanced Materials, EarlyView.
Thermal removal of neutral volatile linkers enables precise and solvent‐free generation of metal vacancies in MOFs. This strategy affords redox‐stable, coordinatively unsaturated FeII sites with tunable spin, ligand coordination, and catalytic behavior. The approach offers a general route to design defect‐functional materials through local coordination
Sonia Martínez‐Giménez, Alejandro Orellana‐Silla, Marta Galbiati, Efrén Navarro‐Moratalla, Luca Braglia, Sara Stolfi, José Antonio Real, Víctor Rubio‐Giménez, Sergio Tatay, Carlos Martí‐Gastaldo   +9 more
wiley   +1 more source

Carbon coated magnetic nanoparticles as supports in microwave-assisted palladium catalyzed Suzuki-Miyaura couplings

Green Processing and Synthesis, 2012
A palladium bis-N-heterocyclic carbene complex was immobilized on polystyrene modified, magnetic carbon coated iron nanoparticles and evaluated in Suzuki-Miyaura cross-coupling reactions under conventional and microwave heating.
Wittmann Sebastian, Majoral Jean-Pierre, Grass Robert N., Stark Wendelin J., Reiser Oliver   +4 more
doaj   +1 more source

Tuning Amorphous‐Crystalline Catalytic Interfaces by Mechanochemistry: Cu‐Based Metallic Glasses Coupled with Ceria for CO Oxidation

Advanced Materials, EarlyView.
Ball‐milling Cu‐based metallic glasses with ceria creates a unique nanostructure where metallic glass particles are wrapped by CeO2 nanoparticles. The intimate integration triggers copper state reorganization during reaction and aging, boosting CO oxidation and COPrOx activity.
Maahin Mirzay‐Shahim, Mehran Nabahat, Laia Pascua‐Solé, Isabel Serrano, Ilaria Lucentini, Xènia Garcia, Marina Armengol‐Profitós, Asier Agrelo‐Lestón, Ignasi Burgués‐Ceballos, Núria J. Divins, Ignacio J. Villar‐Garcia, Virginia Pérez‐Dieste, Carlos Escudero, Carlo Marini, Jordi Llorca, Eloi Pineda, Pere Bruna, Lluís Soler   +17 more
wiley   +1 more source

Palladium nanoparticles immobilized in SnFe2O4/SiO2/PM as efficient heterogeneous catalysts for the suzuki cross-coupling reaction

Scientific Reports
This study focuses on the synthesis of a novel magnetic interphase palladium catalyst immobilized on pyromellitic dianhydride (PM)-coated magnetic SnFe2O4 nanoparticles. Such surface functionalization of magnetic particles represents a promising strategy
Anjan Kumar, Magda H. Abdellattif, Chou-Yi Hsu, Jayanti Makasana, Suhas Ballal, Munther Kadheem, Abhayveer Singh, T. Krithiga, Swati Mishra, Pushpa Negi Bhakuni   +9 more
doaj   +1 more source

PALLADIUM NANOPARTICLES STABILIZED IN AROMATIC POLYMERIC ENVIRONMENT – HIGHLY ACTIVE LIGANDLESS CATALYSTS OF SUZUKI CROSS-COUPLING

Физико-химические аспекты изучения кластеров, наноструктур и наноматериалов, 2019
This work is devoted to the study of influence of the type of polymeric matrix of hyper-crosslinked polystyrene on the formation of catalytically active palladium nanoparticles using palladium acetate as a precursor.
E.S. Bakhvalova, L.Zh. Nikoshvili, V.G. Matveeva, L. Kiwi-Minsker   +3 more
doaj   +1 more source

Mesoporous Silica Nanoparticles in Biomedicine: Advances and Prospects

Advanced Materials, EarlyView.
Mesoporous silica nanoparticles offer unique properties like high surface area, tunable pores, and functionalization. They excel in drug delivery, tissue engineering, and stimuli‐responsive therapies, enabling targeted and controlled treatments. With roles in cancer therapy and diagnostics, their clinical translation requires addressing challenges in ...
Miguel Manzano, María Vallet‐Regí
wiley   +1 more source

Photooxidation of Toluene: Correlation of Noble Metal Loading on Titania and Activation Energy

Journal of Chemistry, 2016
A series of platinum and palladium supported on titania catalysts were prepared by wet impregnation method with the Pt or Pd loading varying in the range of 0.1–1.2 weight percent.
Haroon ur Rashid, Mohammad Sadiq, Muhammad Abid Zia, Saima Sadiq, M. Sohail Ahmad, Razia Aman, Muhammad Humayun, Rahmat Ali   +7 more
doaj   +1 more source

Synthesis and Characterization of Palladium Stabilized Silicon Carbide as a Heterogeneous Photocatalyst in Heck Coupling Reaction under Visible Light Irradiation [PDF]

شیمی کاربردی روز
The Heck reaction is recognized as an effective method for the synthesis of high-value organic compounds, and the use of photocatalysts, particularly palladium nanoparticles, can significantly enhance the yield and selectivity of these reactions. In this
Zahra Bazyar, neda baluchi, mohammad zarei   +2 more
doaj   +1 more source

Azaporphyrinoid‐Based Photo‐ and Electroactive Architectures for Advanced Functional Materials

Advanced Materials, EarlyView.
A long‐standing collaboration between the Torres and Guldi groups has yielded diverse azaporphyrinoid‐based donor‐acceptor nanohybrids with promising applications in solar energy conversion. This conspectus highlights key molecular platforms and structure‐function relationships that govern light and charge management, supporting the rational design of ...
Jorge Labella, Kobra Azizi, Dirk M. Guldi, Tomás Torres   +3 more
wiley   +1 more source