Results 31 to 40 of about 4,646,169 (243)

Sidechain Modulation of Responsive Metal‐Organic Framework Pore Chirality for Enhanced Enantioseparation

Angewandte Chemie, EarlyView.
[Zn2(L‐ValPyr)2] is a chiral and flexible metal‐organic framework that places the isopropyl sidechains of L‐valine inside the pores, creating accessible space in the shape of a three‐blade propeller. The framework adapts its structure to position the substituted aromatic guests in its peripheral pockets through favorable interactions with the isopropyl
Luke A. Johnson, Laurence J. Kershaw Cook, Bhupendra P. Mali, Datta Markad, Nikos Panagiotou, Dmytro Antypov, Alexandros P. Katsoulidis, Matthew J. Rosseinsky   +7 more
wiley   +2 more sources

Biosignature Detection from Amino Acid Enantiomers with Portable Gas Chromatography Systems

Advanced Devices & Instrumentation
This paper presents developments in stationary phase coatings for microelectromechanical system gas chromatography (MEMS GC). Specifically, we present the coating of MEMS GC separation columns with a chiral stationary phase for the separation of amino ...
Ryan C. Blase, Mark J. Libardoni, Christopher R. Glein, Kelly E. Miller, J. Hunter Waite, Maxwell Wei-hao Li, Katsuo Kurabayashi, Xudong Fan   +7 more
doaj   +1 more source

Immobilization of trypsin onto porous methacrylate-based monolith for flow-through protein digestion and its potential application to chiral separation using liquid chromatography

Heliyon, 2021
Monolithic columns for analytical applications have attracted the researcher's attention. In this work, the laboratory-made organic-polymer monolithic column is modified with trypsin and further applied as a nanobiocatalyst microreactor and a stationary ...
Suci Amalia, Stevin Carolius Angga, Elvina Dhiaul Iftitah, Dias Septiana, Baiq Octaviana D. Anggraeny, Warsito, Aliya Nur Hasanah, Akhmad Sabarudin   +7 more
doaj   +1 more source

Artificial molecular machines and motors—Design and control of nanoscale motion

FEBS Letters, EarlyView.
Molecules are constantly moving because of thermal fluctuations, but random motion alone cannot be exploited to perform directional tasks. Artificial molecular machines use chemical, electrical, or light energy to bias this motion. Molecular shuttles, rotary motors, and supramolecular pumps illustrate how nanoscale movement can be controlled and ...
Leonardo Andreoni, Alberto Credi
wiley   +1 more source

To Greater Twist: A Kinetically Biased π‐Radical Cascade

Angewandte Chemie, EarlyView.
π‐Radical cascades enable step‐economic construction of complex polycyclic aromatic frameworks. In this work, we show that a multifurcating pathway can be kinetically steered toward a single, more distorted product. This counterintuitive “falling‐upward” outcome arises from an intrinsic mechanistic bias, revealing a broader dimension of control in π ...
Yong Yang, Joshua C. Walsh, Li Sun, Kevin A. Quintanilla, Ignacio A. Rivas, Zheng Zhou, Juan Casado, Carlos M. Cruz, Michal Juríček   +8 more
wiley   +2 more sources

Chiral Separation and Determination of Etoxazole Enantiomers in Vegetables by Normal-Phase and Reverse-Phase High Performance Liquid Chromatography

Molecules, 2020
The chiral separation of etoxazole enantiomers on Lux Cellulose-1, Lux Cellulose-3, Chiralpak IC, and Chiralpak AD chiral columns was carefully investigated by normal-phase high performance liquid chromatography and reverse-phase high performance liquid ...
Ping Zhang, Yuhan He, Sheng Wang, Dongmei Shi, Yangyang Xu, Furong Yang, Jianhao Wang, Lin He   +7 more
doaj   +1 more source

Accelerated Discovery of Topological Spin Phase Diagrams in CrSBr Magnets Via High‐Throughput Optimization

Advanced Functional Materials, EarlyView.
Here, we develop a high‐throughput algorithm that accelerates the elucidation of phase diagrams of topological spin textures using limited computational resources at high numerical accuracy. Applying this framework to the van der Waals magnet CrSBr, we unveiled a hierarchy of previously unknown topological textures (domain‐wall bimerons, bimeron chains,
Andrew Lyall, Mohammad H. Badarneh, Cristian Bonato, Rebecca Cheung, Elton J. G. Santos   +4 more
wiley   +1 more source

Atroposelective Pd(0)‐Catalyzed Direct Intermolecular C─H Arylation of Thiazole N‐Oxides Provides Access to Heterobiaryls

Angewandte Chemie, EarlyView.
An enantioselective Pd(0)‐catalysed arylation at the C4‐position of thiazole N‐oxides directly forges the atropochiral heterobiaryl axis. A tailored point‐ and axially chiral monodentate phosphine ensures high reactivities along with a tight stereocontrol.
Vitalii Smal, Nicolai Cramer
wiley   +2 more sources

Bistable Isochoric Chiral Metamaterials with Reprogrammable Multiaxial Responses

Advanced Functional Materials, EarlyView.
An isochoric bistable rotational unit cell enables in situ modification of internal contact conditions post‐fabrication, without altering the global envelope dimensions of the surrounding architecture. By selectively switching between open and closed states, the tessellated chiral metamaterial can reprogram its volumetric response, including bulk ...
Shujia Chen, Lei Wu, Jingran Liu, Damiano Pasini   +3 more
wiley   +1 more source

Sequence‐Controlled Helical Ladder Polymers: Impact of Stereochemical Sequence on Helical Geometry and Chiral Recognition

Angewandte Chemie, EarlyView.
Nature programs distinct secondary structures and functions through subtle stereochemical differences, as exemplified by amylose and cellulose. Translating this principle into synthetic ladder polymers, stereochemical sequence control gives rise to diastereomeric coil‐ and ribbon‐type helices with complementary chiral recognition, demonstrating ...
Tomoyuki Ikai, Kanta Wakabayashi, Masaya Yoshida, Kosuke Oki, Eiji Yashima   +4 more
wiley   +2 more sources