Results 121 to 130 of about 449,894 (327)

Flow chemistry in the multi-step synthesis of natural products

open access: yesGreen Synthesis and Catalysis, 2022
The total synthesis of natural products is constantly facing many challenges derived from the complexed chemical structures, the lengthy synthetic routes, the time-consuming workup procedures and the large environmental footprint. In the past two decades,
Li Wan   +5 more
doaj  

High‐Speed and Scalable Wet Spinning of Graphene/Liquid Crystalline Elastomer Composite Filaments

open access: yesAdvanced Functional Materials, EarlyView.
Polydomain filaments from graphene/liquid crystalline elastomer (LCE) composites are scalably‐manufactured by wet spinning across a wide range of diameters (≈137–1128 µm) at a speed up to 4500 m h−1 through a double diffusion coagulation mechanism, enabling fast actuation and optimized mechanical performance for broad applications.
Antonio Proctor Martinez   +5 more
wiley   +1 more source

Structural and magnetic properties of small symmetrical and asymmetrical sized fullerene dimers [PDF]

open access: yesMaterial Research Express 5 (2018) 016105, 2020
Magnetism in carbon nanostructures is of high scientific interest, which could lead to novel magnetic materials. The magnetic properties of symmetrical and asymmetrical sized small fullerene dimers have been investigated using spin polarized density functional theory.
arxiv  

Over 18% Efficiency from Halogen‐Free Solvent‐Processed Polymer Solar Cells Enabled by Asymmetric Small Molecule Acceptors with Fluoro‐Thienyl Extended Terminal

open access: yesAdvanced Functional Materials, EarlyView.
An asymmetric non‐fullerene acceptor BTP‐FT is developed by extending the end group of Y6‐BO with thiophene. The conformation of the molecule is determined by the noncovalent F···S interaction as demonstrated by 2D NMR and simulations. An efficiency of 18.39% is achieved in the resulting ternary solar cells processed from toluene.
Jingnan Wu   +14 more
wiley   +1 more source

Studies directed toward the exploitation of vicinal diols in the synthesis of (+)-nebivolol intermediates

open access: yesBeilstein Journal of Organic Chemistry, 2017
While the exploitation of the Sharpless asymmetric dihydroxylation as the source of chirality in the synthesis of acyclic molecules and saturated heterocycles has been tremendous, its synthetic utility toward chiral benzo-annulated heterocycles is ...
Runjun Devi, Sajal Kumar Das
doaj   +1 more source

Establishing relation of fractions methylated derived glycoluril according to synthesis conditions [PDF]

open access: yes, 2016
Different isomers of dimethylglicoluril are produced by synthesis from monomethylurea and glyoxal.Symmetric isomers have psychotropic activity and asymmetric isomers are hard-separable.
Дементьева, Н. Б.   +2 more
core  

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

open access: yesAdvanced 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   +10 more
wiley   +1 more source

Development of non-nucleoside reverse transcriptase inhibitors (NNRTIs): our past twenty years

open access: yesActa Pharmaceutica Sinica B, 2020
Human immunodeficiency virus (HIV) is the primary infectious agent of acquired immunodeficiency syndrome (AIDS), and non-nucleoside reverse transcriptase inhibitors (NNRTIs) are the cornerstone of HIV treatment.
Chunlin Zhuang   +3 more
doaj  

Synthesis of superheavy elements beyond Z=118 [PDF]

open access: yesarXiv, 2008
We investigate the cold fission/fusion paths of superheavy nuclei within the two center shell model, in order to find the best projectile-target combinations of their production. The fission/fusion yields are estimated by using the semiclassical approach. We predict several asymmetric combinations of relative long living fragments, which can be used in
arxiv  

Unique Performance Considerations for Printable Organic Semiconductor and Perovskite Radiation Detectors: Toward Consensus on Best Practice Evaluation

open access: yesAdvanced Functional Materials, EarlyView.
A lack of standard approaches for testing and reporting the performance of metal halide perovskites and organic semiconductor radiation detectors has resulted in inconsistent interpretation of performance parameters, impeding progress in the field. This Perspective recommends key metrics and experimental details, which are suggested for reporting in ...
Jessie A. Posar   +8 more
wiley   +1 more source

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