Results 91 to 100 of about 848,132 (406)

Permanent porous hydrogen-bonded frameworks with two types of Brønsted acid sites for heterogeneous asymmetric catalysis

Nature Communications, 2019
The search for porous materials with strong Brønsted acid sites for challenging reactions has long been of significant interest, but it remains a formidable synthetic challenge.
W. Gong, Dandan Chu, Hong Jiang, Xu Chen, Yong Cui, Yan Liu   +5 more
semanticscholar   +1 more source

Shape‐Stabilization of Phase Change Materials with Carbon‐Conscious Poly(hydroxy)Urethane Foams

Advanced Functional Materials, EarlyView.
Poly(hydroxy)urethane (PHU) foam, derivable from carbon dioxide (CO2) and bio‐based resources, is a promising material platform for shape‐stabilizing phase change materials (PCMs). We demonstrate the encapsulation of both paraffins and calcium chloride hexahydrate in PHU foam, achieving 48 stable thermal cycles by introducing 5 wt.% barium carbonate ...
Minjung Lee, Samuel D. Dahlhauser, Chloe Lucci, Bryon S. Donohoe, Robert D. Allen, Nicholas A. Rorrer   +5 more
wiley   +1 more source

Data-driven catalyst optimization for stereodivergent asymmetric synthesis by iridium/boron hybrid catalysis

Cell Reports Physical Science, 2021
Summary: Asymmetric catalysis enabling divergent control of multiple stereocenters remains challenging in synthetic organic chemistry. Although machine-learning-based optimization of molecular catalysis is a rapidly growing research field, the use of ...
Hongyu Chen, Shigeru Yamaguchi, Yuya Morita, Hiroyasu Nakao, Xiangning Zhai, Yohei Shimizu, Harunobu Mitsunuma, Motomu Kanai   +7 more
doaj  

Advances in asymmetric organocatalysis over the last 10 years

Nature Communications, 2020
Organocatalysis has become a major pillar of (asymmetric) catalysis. Here, the authors discuss recent trends in organocatalytic activation modes for challenging stereoselective transformations and the emerging integration with other fields, such as ...
Shao-Hua Xiang, Bin Tan
doaj   +1 more source

Charm mesons in magnetized nuclear matter -- effects of (inverse) magnetic catalysis [PDF]

arXiv, 2022
We investigate the in-medium masses of the pseudoscalar $(D,{\bar D},D_s^{\pm})$, and vector $(D^*,\bar{D}^*, D_s^{*\pm})$, open charm mesons in isospin asymmetric magnetized nuclear matter, accounting for the effects of Dirac sea. The masses are used to study the in-medium partial decay widths of $D^* \rightarrow D \pi$ ($\bar{D}^*\rightarrow \bar{D ...
arxiv  

Regioselective and Anisotropic Multi‐Patching of Small Microparticles via a Polymer Brush‐Assisted Microcontact Printing (µCP)

Advanced Functional Materials, EarlyView.
A method to fabricate anisotropic SiO2 patchy microspheres is presented using a modified microcontact printing technique. This involves a PDMS elastomer stamp with grooved surface topography, creating a confined environment for the microspheres.
Martin Reifarth, Marcel Sperling, Richard Grobe, Pinar Akarsu, Florian Schmitt, Maurice Schmette, Steffen Tank, Katja M. Arndt, Salvatore Chiantia, Matthias Hartlieb, Alexander Böker   +10 more
wiley   +1 more source

Enantioselective acyl-trifluoromethylation of olefins by bulky thiazolium carbene catalysis

Nature Communications
Enantioenriched α-chiral β-fluorinated ketones are valuable structural motifs with application in several fields. The recently emerged concept of NHC-catalyzed radical acyl-trifluoromethylation of olefins offers a rapid route to construct racemic β ...
Sripati Jana, Matthew D. Wodrich, Nicolai Cramer   +2 more
doaj   +1 more source

Exploring Electronic States and Ultrafast Electron Dynamics in AlInP Window Layers: The Role of Surface Reconstruction

Advanced Functional Materials, EarlyView.
This study examines the surface characteristics of AlInP (001), crucial for advanced solar cells and photoelectrochemical devices. Using theoretical modeling and experiments, it identifies how phosphorus‐rich and indium‐rich surfaces create mid‐gap states that pin the Fermi level and influence ultrafast electron dynamics.
Mohammad Amin Zare Pour, Sahar Shekarabi, Isaac Azahel Ruiz Alvarado, Jonathan Diederich, Yuyings Gao, Agnieszka Paszuk, Dominik C. Moritz, Wolfram Jaegermann, Dennis Friedrich, Roel van de Krol, Wolf Gero Schmidt, Thomas Hannappel   +11 more
wiley   +1 more source

Photocatalytic three-component asymmetric sulfonylation via direct C(sp3)-H functionalization

Nature Communications, 2021
The direct and selective C(sp3)-H functionalization of cycloalkanes and alkanes is useful in organic synthesis but its application to asymmetric catalysis has been less explored.
Shi Cao, Wei Hong, Ziqi Ye, Lei Gong
doaj   +1 more source

Enantioselective Organocatalytic Singly Occupied Molecular Orbital Activation: The Enantioselective α-Enolation of Aldehydes [PDF]

, 2007
The first enantioselective organocatalytic α-enolation of aldehydes has been accomplished using singly occupied molecular orbital (SOMO) catalysis.
Hong, Jun-Bae, Jang, Hye-Young, MacMillan, David W. C.   +2 more
core   +1 more source