نتایج جستجو برای: iridium nanoparticles

تعداد نتایج: 111183  

Journal: :Organic & biomolecular chemistry 2015
Xiang Sun Xiao-Hui Lv Lin-Miao Ye Yu Hu Yan-Yan Chen Xue-Jing Zhang Ming Yan

Iridium-catalyzed acceptorless dehydrogenative coupling of tertiary amines and arylamines has been developed. A number of benzimidazoles were prepared in good yields. An iridium-mediated C-H activation mechanism is suggested. This finding represents a novel strategy for the synthesis of benzimidazoles.

2011
Eric D. Slessinger Rodney Fletcher Indra J Das

PURPOSE A study was conducted to determine the dosimetric effects resulting from air pockets and high atomic number (Z) contrast medium within a multichannel breast brachytherapy device. MATERIAL AND METHODS A 5-6 cm diameter Contura (SenoRx) brachytherapy device was inflated using 37 cm(3) of saline. Baseline dose falloff from an HDR Iridium-192 source was measured with the Iridium source ce...

Abolfazl Mahmoodi Hossein Tavakoli-Anbaran,

Introduction: Radiotherapy involves all methods that can provide a special amount of ionizing radiation to malignant tissue with the assumption that minimal damage to healthy tissues is achieved. We are looking for a valuable and reliable method to measure the absorption dose and also the ability to measure the absorption dose distribution in three dimensions, which today is th...

Journal: :Catalysts 2021

The valorisation of biomass-derived platform chemicals via catalytic hydrogenation is an eco-friendly tool which allows us to recover bio-based building blocks and produce fine with high industrial appeal. In the present study, a novel surfactant-type triazolyl-thioether ligand was prepared, showing excellent activity in presence bis(1,5-cyclooctadiene)diiridium(I) dichloride [Ir(COD)Cl]2 for f...

Journal: :Chemcatchem 2022

Abstract Here, tetrakis(hydroxymethyl)phosphonium chloride‐protected colloidal iridium nanoparticles were deposited by sol‐immobilisation on three different supports (CeO 2 , NiO and TiO ) investigated for the liquid‐phase direct hydrogenation (H atmosphere) catalytic transfer – CTH (N of furfural to study effect H donor. The occurrence strong‐metal support interactions in 1 wt % Ir/CeO catalys...

2016
L Burakovsky M J Cawkwell D L Preston D Errandonea S I Simak

The phase diagram of iridium is investigated using the Z methodology in conjunction with the VASP ab initiomolecular dynamics package. The Z methodology is a novel technique for phase diagram studies which combines the direct Z method for the computation of melting curves and the inverse Z method for the calculation of solid-solid phase boundaries. We compare our results to the available experi...

Journal: :Crystals 2022

Noble-metal nanoparticles (NMNPs), with their outstanding properties, have been arousing the interest of scientists for centuries. Although our knowledge them is much more significant today, and we can obtain NMNPs in various sizes, shapes, compositions, has not waned. When talking about noble metals, gold, silver, platinum come to mind first. Still, cannot forget elements belonging so-called g...

2015
Lihua Lu Li-Juan Liu Wei-chieh Chao Hai-Jing Zhong Modi Wang Xiu-Ping Chen Jin-Jian Lu Ruei-nian Li Dik-Lung Ma Chung-Hang Leung

Group 9 transition metal complexes have been widely explored as therapeutic agents due to their unique geometry, their propensity to undergo ligand exchanges with biomolecules and their diverse steric and electronic properties. These metal complexes can offer distinct modes of action in living organisms compared to carbon-based molecules. In this study, we investigated the antimicrobial and ant...

2010
E. Berdermann M. Ciobanu S. Dunst M. S. Rahman M. Schreck M. Träger

A promising course for large-area ‘quasi’ single-crystal CVD diamond (scCVDD) is the heteroepitaxial growth on the multilayer structure Ir/YSZ/Si(001) [1] as developed at the University of Augsburg on 4inch wafers. Key issue is the similarity of the lattice constants of diamond (dDia = 3.567 Å) and Iridium (dIr = 3.834 Å). Figure 1 shows characterization results of two Diamond-on-Iridium (DoI) ...

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