Results 71 to 80 of about 57,754 (307)

Topological-skeleton controlled chirality expression of supramolecular hyperbranched and linear polymers

Fundamental Research, 2022
The topology of polymers plays an essential role in their chemical, physical and biological properties. However, their effects on chirality-related functions remain unclear.
Xin Song, Xuefeng Zhu, Hao Yao, Weili Shang, Cong Du, Wensheng Lu, Minghua Liu, Wei Tian   +7 more
doaj   +1 more source

3D Printing Innovations in Polymeric Porous and Patterned Architecture

Advanced Functional Materials, EarlyView.
Polymeric foams occupy a unique structural space between dense solids and open networks, where engineered void fraction governs mechanical compliance, thermal resistance, and mass transport. Additive manufacturing now enables precise spatial control over cellular architecture, unlocking designer foam structures across applications spanning crash ...
Dhanush Patil, Sri Vaishnavi Thummalapalli, Clarissa Westover, Arunachalam Ramanathan, M. Taylor Sobzcak, Roumika Patil, Qixuan Xiang, Tiantian Li, Sui Yang, Timothy E. Long, Hongyue Sun, Xianqiao Wang, Yang Liu, Kenan Song   +13 more
wiley   +1 more source

Chiral and Chirality Discrimination on Helical Polyacetylenes

Analytical Sciences, 2002
Synthesis and function of helical polyphenylacetylenes are briefly reviewed. Optically active helical polyphenylacetylenes were synthesized by polymerization of the corresponding chiral phenylacetylene monomers and their chiral recognition abilities were evaluated as a chiral stationary phase for HPLC.
openaire   +2 more sources

Template‐Confined Synthesis of Shape‐Engineered Single‐Crystal Gold Microplates in Lithographically‐Defined Polymeric Patterns

Advanced Functional Materials, EarlyView.
Single‐crystal gold microplates are high‐performance nanomaterials with an impressive wafer‐based application space. Progress has, however, been tempered by an inability to exert synthetic control over microplate size, shape, and positioning. In this work, control over these parameters is demonstrated using a seed‐mediated synthesis that both confines ...
Debasish Panda, Md Rashed Nizam, Walker J. Tuff, Collin C. Wyant, Maksym Zhukovskyi, Matthew R. Rosenberger, Botond Sánta, Edward C. Kinzel, Robert A. Hughes, Svetlana Neretina   +9 more
wiley   +1 more source

Asymmetric synthesis of β-amino cyanoesters with contiguous tetrasubstituted carbon centers by halogen-bonding catalysis with chiral halonium salt

Beilstein Journal of Organic Chemistry
β-Amino cyanoesters are important scaffolds because they can be transformed into useful chiral amines, amino acids, and amino alcohols. Halogen bonding, which can be formed between halogen atoms and electron-rich chemical species, is attractive because ...
Yasushi Yoshida, Maho Aono, Takashi Mino, Masami Sakamoto   +3 more
doaj   +1 more source

The pharmacology, pharmacokinetics, and toxicity of spinosin: A mini review

Frontiers in Pharmacology, 2022
Spinosin, a natural flavone-C-glycoside that is mainly isolated from the seeds of Ziziphus jujuba Mill. var. spinosa. It exerts the effects to ameliorate the neurological disorders, such as hypnosis effects, improvement of cognitive function, sedation ...
Xiaolan Kuang, Ganshu She, Ting Ma, Wanna Cai, Jingjing Zhao, Bo Liu, Fangfang Xu   +6 more
doaj   +1 more source

Chiral Phase Change Nanomaterials

Advanced Functional Materials, EarlyView.
This work demonstrates reversible, non‐volatile phase transitions in chiral Ge2${\rm Ge}_2$Sb2${\rm Sb}_2$Te5${\rm Te}_5$ (GST) nanohelices for high‐speed optical modulation of chirality and dynamic control of the state of polarization (SOP). The chiral nanostructures are fabricated using a highly directional, wafer‐scale physical vapor deposition ...
Joshua A. Burrow, Md Shah Alam, Riad Yahiaoui, Evan M. Smith, Ryan Laing, Jules Gardener, Thomas A. Searles, Piyush J. Shah, Shivashankar Vangala, Joshua R. Hendrickson, Andrew M. Sarangan, Imad Agha   +11 more
wiley   +1 more source

Dye‐Initiated Chirped Cholesteric Polymer Networks Exhibiting Broadband Dissipative Chiral Photonic Bands

Advanced Functional Materials, EarlyView.
A dye‐based photoinitiator acting as a structure‐directing element, guides the formation of a cholesteric polymer network that behaves as a chirped photonic structure with dissipative chiral coupling. Photopolymerization freezes a depth‐dependent helical pitch, broadening the Bragg resonance spectrum.
Alfredo Mazzulla, Pasquale Pagliusi, Gabriella Cipparrone   +2 more
wiley   +1 more source

Synthesis of enantiopure (S)?6?chlorochroman?4?ol using whole?cell Lactobacillus paracasei biotransformation

, 2020
Chromane, which has a fused cyclic structure, is a significant molecule that can be found in the structure of many important compounds. Lactobacillus paracasei BD101 was demonstrated as whole‐cell biocatalyst for the synthesis of (S)‐6‐chlorochroman‐4‐ol
Şahin, Engin, Engin Şahin
core   +1 more source

Chirality-Induced Propagation Velocity Asymmetry

, 2021
The spin-dependent propagation of electrons in helical nanowires is investigated. We show that the interplay of spin angular momentum and nanowire chirality, under spin–orbit interaction, lifts the symmetry between left and right propagating electrons ...
Luis G. C. Rego, Diego A. Hoff (2177112), Luis G. C. Rego (9174444), Diego A. Hoff   +3 more
core   +1 more source