نتایج جستجو برای: palladium nanoparticles pd nps

تعداد نتایج: 176490  

Journal: :Organic & biomolecular chemistry 2011
Hosahalli P Hemantha Vommina V Sureshbabu

Palladium nanoparticles supported over poly(vinyl)chloride matrix (PVC-Pd(0)) are prepared through an efficient and inexpensive protocol. The catalyst has been characterized by XRD, SEM and TEM and its utility for the reduction of a range of functional groups as well as for the removal of some common protecting groups employed in peptide chemistry is demonstrated.

Journal: :Chemical communications 2007
Ju Yeon Shin Bang Sook Lee Yeongri Jung Sung Jin Kim Sang-gi Lee

Palladium nanoparticles were captured onto spherical silica particles using a molecular band composed of imidazolium chloride and urea moieties to form raspberry-like Pd@SiO2 composites, which can be recovered and reused without any loss of catalytic activity in Suzuki-Miyaura coupling.

2016
Guojun Xu Xinghua Yu Jinxie Zhang Yingchao Sheng Gan Liu Wei Tao Lin Mei

One limitation of current biodegradable polymeric nanoparticles (NPs) is the contradiction between functional modification and maintaining formerly excellent bioproperties with simple procedures. Here, we reported a robust aptamer-polydopamine-functionalized mannitol-functionalized poly(lactide-co-glycolide) (M-PLGA)-D-α-tocopheryl polyethylene glycol 1000 succinate (TPGS) nanoformulation (Apt-...

Journal: :Dalton transactions 2014
Shrikant M Khake Vineeta Soni Rajesh G Gonnade Benudhar Punji

Well-defined and efficient POCN-ligated palladium complexes have been developed for the direct C-H bond arylation of azoles with aryl iodides. The phosphinite-amine pincer ligands 1-(R2PO)-C6H4-3-(CH2N(i)Pr2) [(R2)POCN(iPr2)-H; R = (i)Pr (), R = (t)Bu ()] and corresponding palladium complexes {2-(R2PO)-C6H3-6-(CH2N(i)Pr2)}PdCl [((R2)POCN(iPr2))PdCl; R = (i)Pr (), R = (t)Bu ()] were synthesized ...

2015
Beata Zielinska Beata Michalkiewicz Ewa Mijowska Ryszard Józef Kalenczuk

Pd nanoparticles with different sizes and diameter distributions were successfully deposited on the surface of disordered mesoporous carbon spheres (DMHCS). The size and diameter distribution of the Pd particles were controlled by the application of different experimental conditions. Two methods of synthesis (reflux and impregnation) and two Pd precursors (palladium (II) acetyloacetonate (Pd(ac...

2016
Dongshuang Wu Kohei Kusada Hiroshi Kitagawa

Pd and Ru are two key elements of the platinum-group metals that are invaluable to areas such as catalysis and energy storage/transfer. To maximize the potential of the Pd and Ru elements, significant effort has been devoted to synthesizing Pd-Ru bimetallic materials. However, most of the reports dealing with this subject describe phase-separated structures such as near-surface alloys and physi...

2014
Shuichi Shibuya Yusuke Ozawa Kenji Watanabe Naotaka Izuo Toshihiko Toda Koutaro Yokote Takahiko Shimizu Hemachandra Reddy

Cu-Zn superoxide dismutase (Sod1) loss causes a redox imbalance as it leads to excess superoxide generation, which results in the appearance of various aging-related phenotypes, including skin atrophy. Noble metal nanoparticles, such as palladium (Pd) and platinum (Pt) nanoparticles, are considered to function as antioxidants due to their strong catalytic activity. In Japan, a mixture of Pd and...

Journal: :Physical chemistry chemical physics : PCCP 2014
Wilm Jones Ren Su Peter P Wells Yanbin Shen Nikolaos Dimitratos Michael Bowker David Morgan Bo B Iversen Arunabhiram Chutia Flemming Besenbacher Graham Hutchings

The development of efficient photocatalytic routines for producing hydrogen is of great importance as society moves away from energy sources derived from fossil fuels. Recent studies have identified that the addition of metal nanoparticles to TiO2 greatly enhances the photocatalytic performance of these materials towards the reforming of alcohols for hydrogen production. The core-shell structur...

Journal: :Organic & biomolecular chemistry 2010
Subhash Banerjee Vagulejan Balasanthiran Ranjit T Koodali Grigoriy A Sereda

A novel, heterogeneous Pd-MCM-48 catalyst has been developed by encapsulating palladium nanoparticles into the cubic phase of mesoporous MCM-48 matrix at room temperature. The catalyst demonstrated excellent chemo- and regioselectivity for the hydrogenation of olefins at room temperature within 30-80 min. The turnover frequency for the hydrogenation is very high (4400 h(-1)). Interestingly, sel...

2015
Marta Esteves Ana C. Cristóvão Tatiana Saraiva Sandra M. Rocha Graça Baltazar Lino Ferreira Liliana Bernardino

Retinoic acid (RA) plays an important role in the commitment, maturation and survival of neural cells. Recently, RA was pointed as a therapeutic option for some neurodegenerative diseases, including Parkinson's disease (PD). The administration of RA has been defying, and in this sense we have previously developed novel RA-loaded polymeric nanoparticles (RA-NPs) that ensure the efficient intrace...

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