scholarly journals 157-nm pellicles for photolithography: mechanistic investigation of the deep-UV photolysis of fluorocarbons

2004 ◽  
Author(s):  
Kwangjoo Lee ◽  
Steffen Jockusch ◽  
Nicholas J. Turro ◽  
Roger H. French ◽  
Robert C. Wheland ◽  
...  
Keyword(s):  
Uv Photolysis ◽  
Mechanistic Investigation ◽  
Deep Uv

scholarly journals Selective, Room-Temperature Transformation of Methane to C1 Oxygenates by Deep UV Photolysis over Zeolites

2011 ◽  
Vol 133 (43) ◽  
pp. 17257-17261 ◽  
Author(s):  
Francesc Sastre ◽  
Vicente Fornés ◽  
Avelino Corma ◽  
Hermenegildo García
Keyword(s):  
Room Temperature ◽  
Uv Photolysis ◽  
Temperature Transformation ◽  
Deep Uv

Development of Silicon Wafer Packaging Technology for Deep UV LED

2020 ◽  
Vol 140 (7) ◽  
pp. 152-157
Author(s):  
Hirofumi Chiba ◽  
Yukio Suzuki ◽  
Yoshiaki Yasuda ◽  
Mitsuyasu Kumagai ◽  
Takaaki Koyama ◽  
...  
Keyword(s):  
Silicon Wafer ◽  
Packaging Technology ◽  
Uv Led ◽  
Deep Uv

Evolution of Metastable Structures in Bimetallic Catalysts from Microscopy and Machine-Learning Molecular Dynamics

2020 ◽  
Author(s):  
Jin Soo Lim ◽  
Jonathan Vandermause ◽  
Matthijs A. van Spronsen ◽  
Albert Musaelian ◽  
Christopher R. O’Connor ◽  
...  
Keyword(s):  
Machine Learning ◽  
Molecular Dynamics ◽  
Large Scale ◽  
Materials Science ◽  
Complete Characterization ◽  
Layer By Layer ◽  
Surface Restructuring ◽  
Metastable Structures ◽  
Mechanistic Investigation ◽  
Underlying Mechanisms

Restructuring of interface plays a crucial role in materials science and heterogeneous catalysis. Bimetallic systems, in particular, often adopt very different composition and morphology at surfaces compared to the bulk. For the first time, we reveal a detailed atomistic picture of the long-timescale restructuring of Pd deposited on Ag, using microscopy, spectroscopy, and novel simulation methods. Encapsulation of Pd by Ag always precedes layer-by-layer dissolution of Pd, resulting in significant Ag migration out of the surface and extensive vacancy pits. These metastable structures are of vital catalytic importance, as Ag-encapsulated Pd remains much more accessible to reactants than bulk-dissolved Pd. The underlying mechanisms are uncovered by performing fast and large-scale machine-learning molecular dynamics, followed by our newly developed method for complete characterization of atomic surface restructuring events. Our approach is broadly applicable to other multimetallic systems of interest and enables the previously impractical mechanistic investigation of restructuring dynamics.

Theoretical and experimental studies of palladium-catalyzed site-selective C(sp3)−H bond functionalization enabled by transient ligands

2017 ◽  
Author(s):  
Haibo Ge ◽  
Lei Pan ◽  
Piaoping Tang ◽  
Ke Yang ◽  
Mian Wang ◽  
...  
Keyword(s):  
Bond Activation ◽  
Theoretical Calculations ◽  
Experimental Studies ◽  
Bond Functionalization ◽  
Aliphatic Ketones ◽  
Site Selectivity ◽  
Mechanistic Investigation ◽  
Palladium Catalyzed ◽  
Metal Catalyzed ◽  
Site Selective

Transition metal-catalyzed selective C–H bond functionalization enabled by transient ligands has become an extremely attractive topic due to its economical and greener characteristics. However, catalytic pathways of this reaction process on unactivated sp<sup>3</sup> carbons of reactants have not been well studied yet. Herein, detailed mechanistic investigation on Pd-catalyzed C(sp<sup>3</sup>)–H bond activation with amino acids as transient ligands has been systematically conducted. The theoretical calculations showed that higher angle distortion of C(sp2)-H bond over C(sp3)-H bond and stronger nucleophilicity of benzylic anion over its aromatic counterpart, leading to higher reactivity of corresponding C(sp<sup>3</sup>)–H bonds; the angle strain of the directing rings of key intermediates determines the site-selectivity of aliphatic ketone substrates; replacement of glycine with β-alanine as the transient ligand can decrease the angle tension of the directing rings. Synthetic experiments have confirmed that β-alanine is indeed a more efficient transient ligand for arylation of β-secondary carbons of linear aliphatic ketones than its glycine counterpart.<br><br>

Mechanistic Investigation of Rh(I)-Catalyzed Asymmetric Suzuki-Miyaura Coupling with Racemic Allyl Halides

2019 ◽  
Author(s):  
Lucy van Dijk ◽  
Ruchuta Ardkhean ◽  
Mireia Sidera ◽  
Sedef Karabiyikoglu ◽  
Özlem Sari ◽  
...  
Keyword(s):  
Quantum Chemical Calculations ◽  
Quantum Chemical ◽  
Experimental Studies ◽  
Mechanistic Investigation ◽  
Allyl Halides

A mechanism for Rh(I)-catalyzed asymmetric Suzuki-Miyaura coupling with racemic allyl halides is proposed based on a combination of experimental studies and quantum chemical calculations. <br>

PULSED UV IRRADIATION USING DEEP UV-LED FOR INACTIVATION OF ESCHERICHIA COLI

2019 ◽  
Vol 75 (7) ◽  
pp. III_91-III_96
Author(s):  
Tomoyasu SADO ◽  
Kumiko OGUMA ◽  
Takashi HASHIMOTO ◽  
Shinobu KAZAMA ◽  
Satoshi TAKIZAWA
Keyword(s):  
Escherichia Coli ◽  
Uv Irradiation ◽  
Uv Led ◽  
Deep Uv

Deep-UV emission at 260 nm from MBE-grown AlGaN/AlN quantum-well structures

2019 ◽  
Vol 512 ◽  
pp. 213-218 ◽  
Author(s):  
Wenxian Yang ◽  
Yukun Zhao ◽  
Yuanyuan Wu ◽  
Xuefei Li ◽  
Zhiwei Xing ◽  
...  
Keyword(s):  
Quantum Well ◽  
Quantum Well Structures ◽  
Uv Emission ◽  
Deep Uv
Sign in / Sign up

Export Citation Format

Share Document