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   Articles with "figure eight" as a keyword



Tetratellura[36]octaphyrin(1.1.1.1.1.1.1.1) Metalation: From Dynamic Behavior to Rigid Chiral Figure-of-Eight Molecule; Activation of the C–Te Bond by Ruthenium

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recommendations! Published in 2024 at "Inorganic Chemistry"

DOI: 10.1021/acs.inorgchem.4c03506

Abstract: The large expanded telluraporphyrin, tetratellura[36]octaphyrin(1.1.1.1.1.1.1.1), was synthesized in 7% yield by acid-catalyzed condensation of pyrrole with 2,5-bis(phenylhydroxymethyl)tellurophene and subsequent oxidation. The macrocycle acquires the chiral figure-eight conformation with two alternative spatial arrangements of the heterocyclic… read more here.

Keywords: tetratellura; figure eight; chiral figure; dynamic behavior ... See more keywords
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Circularly Polarized Luminescence Designed from Molecular Orbitals: A Figure-Eight-Shaped [5]Helicene Dimer with D2 Symmetry.

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recommendations! Published in 2020 at "Organic letters"

DOI: 10.1021/acs.orglett.0c03506

Abstract: Although many chiral molecules exhibiting circularly polarized luminescence (CPL) have been reported recently, few molecular design guidelines are known for increasing the dissymmetry factor for CPL (glum). We demonstrate that a figure-eight-shaped molecule with D2… read more here.

Keywords: circularly polarized; eight shaped; polarized luminescence; figure eight ... See more keywords

Diagnosing Ring Current(s) in Figure-Eight Skeletons: A 3D Through-Space Conjugation in the Two-Loops Crossing

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recommendations! Published in 2022 at "Organic Letters"

DOI: 10.1021/acs.orglett.2c01625

Abstract: The macrocyclic structures with local conjugation readily undergo a redox-triggered change in the diatropic character, leading to a global current–density pathway of the doubly charged systems. The figure-eight geometry of the neutral dimer does not… read more here.

Keywords: current figure; figure eight; ring current; diagnosing ring ... See more keywords

Enantioselective Synthesis of Axially Chiral Figure-Eight Spirocycloparaphenylenes via Rh-Catalyzed Intermolecular [2 + 2 + 2] Cycloaddition.

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recommendations! Published in 2023 at "Organic letters"

DOI: 10.1021/acs.orglett.3c00895

Abstract: We have achieved the enantioselective synthesis of axially chiral figure-eight spiro[9.9]cycloparaphenylene (CPP) tetracarboxylates with up to 75:25 er via the cationic Rh(I)/(R)-H8-BINAP complex-catalyzed chemo-, regio-, and enantioselective intermolecular double [2 + 2 + 2] cycloaddition… read more here.

Keywords: enantioselective synthesis; figure eight; axially chiral; synthesis axially ... See more keywords

The photophysical properties of cycloparaphenylene-based compounds with figure-eight configurations

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recommendations! Published in 2020 at "New Journal of Chemistry"

DOI: 10.1039/d0nj02637a

Abstract: Cyclic conjugated compounds, especially those with inflection points, have become popular in chemistry and materials science as a result of their unique structures and interesting properties. Moreover, they demonstrate great potential in the development of… read more here.

Keywords: chemistry; figure eight; cycloparaphenylene based; compounds figure ... See more keywords

Self-assembling figure-of-eight and pseudoplectoneme aromatic oligoamide ribbons.

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recommendations! Published in 2022 at "Chemical communications"

DOI: 10.1039/d2cc01696f

Abstract: Two oligoamide macrocycles composed of eight and twelve 7-amino-8-fluoro-2-quinolinecarboxylic acid monomers were synthesised despite the propensity of their acyclic precursors to fold and self-assemble into double helices. Macrocyclisations were made possible through the transient use… read more here.

Keywords: figure eight; assembling figure; eight pseudoplectoneme; self assembling ... See more keywords
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Molecular assembly with figure-of-eight nanohoop as a strategy for collection and stabilization of cyclo[18]carbon

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recommendations! Published in 2023 at "Physical Chemistry Chemical Physics"

DOI: 10.1039/d3cp01896b

Abstract: The recently synthesized novel figure-of-eight nanohoop with two strained oligoparaphenylene (OPP) was theoretically designed to collect and stabilize new allotropic carbon cyclo[18]carbon (C18) through molecular assembly. The size adaptability and... read more here.

Keywords: carbon; figure eight; cyclo carbon; molecular assembly ... See more keywords

In Vitro Biomechanical Study on the “Figure-of-Eight” and Kessler Sutures in Swine Flexor Tendons *

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recommendations! Published in 2020 at "Revista Brasileira de Ortopedia"

DOI: 10.1055/s-0039-1700828

Abstract: Objective  To evaluate the biomechanical properties of the “figure-of-eight” and Kessler suture techniques for tendons. Methods  Flexor tendons of porcine fingers were divided into two groups with triple central “figure of eight” sutures (six passages)… read more here.

Keywords: figure eight; suture; eight kessler; flexor tendons ... See more keywords

The psychometric properties of the figure-of-eight walk test in people with Parkinson's disease

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recommendations! Published in 2022 at "Disability and Rehabilitation"

DOI: 10.1080/09638288.2022.2028020

Abstract: Abstract Purpose To investigate: (1) the interrater, and test–retest reliability of the figure-of-eight walk test (F8WT) in people with Parkinson's disease (PwPD); (2) the minimum detectable change in the F8WT times; (3) the concurrent and… read more here.

Keywords: walk test; figure eight; f8wt; parkinson disease ... See more keywords

Bifurcation analysis of figure-eight choreography in the three-body problem based on crystallographic point groups

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recommendations! Published in 2024 at "Journal of Physics A: Mathematical and Theoretical"

DOI: 10.1088/1751-8121/ad97fc

Abstract: The bifurcation of figure-eight choreography is analyzed by its symmetry group based on the variational principle of the action. The irreducible representations determine the symmetry and the dimension of the Lyapunov–Schmidt reduced action, which yields… read more here.

Keywords: solution type; eight choreography; figure eight; bifurcation ... See more keywords

Closure of Large Percutaneous Femoral Venous access using a Modified “Figure-of-Eight” Suture

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recommendations! Published in 2018 at "Innovations: Technology and Techniques in Cardiothoracic and Vascular Surgery"

DOI: 10.1097/imi.0000000000000488

Abstract: Recent advances in different percutaneous treatments made insertion of large-caliber sheaths in the femoral veins more common. Venous punctures are historically managed by initial manual compression with subsequent application of a compression bandage and bed… read more here.

Keywords: closure; figure eight; suture; eight suture ... See more keywords