Articles with "ladder" as a keyword



Ladder-Like Aromatic Imide-Functionalized Poly(silsesquioxane): Preparation and Characterization via the Sol–Gel Route

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Published in 2017 at "Advances in Polymer Technology"

DOI: 10.1002/adv.21576

Abstract: A ladder-like polysilsesquioxane (PSSQ) has been synthesized by reacting pyromellitic acid anhydride (PMDA) with (3-aminopropyl)triethoxysilane (APTES), yielding the corresponding poly(amic acid) (PAA). The as-prepared PAA was converted to an imide-functionalized PSSQ by thermal treatment at… read more here.

Keywords: ladder like; molar ratio; aptes molar; imide functionalized ... See more keywords

A methodology for enhancing bandwidth with keeping steepness of the ladder filters exploiting acoustic‐wave‐lumped‐element resonators

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Published in 2024 at "Microwave and Optical Technology Letters"

DOI: 10.1002/mop.34280

Abstract: A methodology to acquire a wide bandwidth and steep transition of a hybrid ladder filter with the acoustic‐wave‐lumped‐element‐resonators (AWLRs) structure is proposed. Different from previous works, a unit of the new AWLR structure with two… read more here.

Keywords: ladder; methodology; acoustic wave; bandwidth ... See more keywords

Disulfide Reduction Allosterically Destabilizes the β-Ladder Subdomain Assembly within the NS1 Dimer of ZIKV.

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Published in 2020 at "Biophysical journal"

DOI: 10.1016/j.bpj.2020.08.036

Abstract: The Zika virus (ZIKV) was responsible for a recent debilitating epidemic that till date has no cure. A potential way to reduce ZIKV virulence is to limit the action of the nonstructural proteins involved in… read more here.

Keywords: reduction allosterically; disulfide reduction; ladder; zikv ... See more keywords

The design method for concrete waterfront amphibian ladder along streams

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Published in 2017 at "Ecological Engineering"

DOI: 10.1016/j.ecoleng.2017.05.019

Abstract: Abstract How to balance environmental development and ecological conservation is one of the important issues of recent years. The main objective of this study is to investigate the behavioral patterns of amphibians on different substrates… read more here.

Keywords: amphibian ladder; buergeia robustus; ladder; rana swinhoana ... See more keywords

A rational synthesis of ladder-like motif in zinc-methylphosphonate from a preformed coordination assembly

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Published in 2018 at "Inorganica Chimica Acta"

DOI: 10.1016/j.ica.2018.07.016

Abstract: Abstract The study describes the synthesis of new hybrid zinc phosphonates, {Zn(O3PMe)(4,4′-bipy)0.5}·2H2O (2), {Zn(O3PMe)(1,2-bpe)0.5}·H2O (3) and Zn(O3PMe)(Im) (4) [4,4′-bipyridine (4,4′-bipy), 1,2-bis(4-pyridyl)ethane (1,2-bpe) and imidazole (Im)] by hydro(solvo)thermal reaction (140–150 °C, 3 days) of a preformed coordination polymer,… read more here.

Keywords: zinc; rational synthesis; methylphosphonate; ladder ... See more keywords

High efficiency small molecular acceptors based on novel O-functionalized ladder-type dipyran building block

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Published in 2018 at "Nano Energy"

DOI: 10.1016/j.nanoen.2017.12.030

Abstract: Abstract Molecular electronic structure plays a vital role in the photovoltaic performances in nonfullerene polymer solar cells (PSCs) due to their influences on light-harvesting, charge carrier transfer, π-π stacking and morphology tuning etc. Oxygen as… read more here.

Keywords: block; building block; ladder; type ... See more keywords

Individual factors that influence task performance on a stepladder in older people

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Published in 2021 at "Safety Science"

DOI: 10.1016/j.ssci.2020.105152

Abstract: Abstract Ladder falls are a common cause of injury in the domestic setting, particularly among older adults. There is a need, therefore, to understand contributing factors of safe and effective ladder use in this group.… read more here.

Keywords: task performance; task; upper limb; strength ... See more keywords

Synthesis of Ladder-Type 9,9'-Bifluorenylidene-Based Conjugated Oligomers via a Pd-Catalyzed Tandem Suzuki Coupling/Heck Cyclization Approach.

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Published in 2022 at "Organic letters"

DOI: 10.1021/acs.orglett.2c02418

Abstract: For new ladder-type oligomers and polymers with versatile and robust synthetic strategies, in this study, four fully conjugated ladder-type overcrowded 9,9'-bifluorenylidene-based compounds and oligomers (BFY1, BFY2, BFY3, and BFY4) were synthesized via a Pd-catalyzed tandem… read more here.

Keywords: bifluorenylidene based; spectroscopy; via catalyzed; ladder ... See more keywords

Regioisomeric Spirobifluorene CANAL Ladder Polymers and Their Gas Separation Performance.

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Published in 2024 at "ACS macro letters"

DOI: 10.1021/acsmacrolett.3c00725

Abstract: We synthesized and characterized two isomeric microporous hydrocarbon ladder polymers from catalytic arene norbornene annulation (CANAL) of regioisomeric bis-norbornene fused spirobifluorenes, where the ladder chains are connected either through the same fluorene unit or across… read more here.

Keywords: ladder; ladder polymers; separation performance; gas ... See more keywords

The synthesis and property investigation of π-bridged 9,9′-bifluorenylidene ladder as an electron acceptor

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Published in 2020 at "New Journal of Chemistry"

DOI: 10.1039/c9nj06090a

Abstract: An efficient synthesis method has been described to achieve a new ladder-type conjugated molecule: π-bridged 9,9′-bifluorenylidene dimer (BBF). Theoretical calculations, absorption spectroscopy, electrochemistry, and fluorescence quenching experiments have been employed to reveal that a ladder-type… read more here.

Keywords: property investigation; bridged bifluorenylidene; synthesis property; ladder ... See more keywords

Extraordinary electrochemical stability and extended polaron delocalization of ladder-type polyaniline-analogous polymers†

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Published in 2020 at "Chemical Science"

DOI: 10.1039/d0sc03348k

Abstract: Electrochemical stability and delocalization of states critically impact the functions and practical applications of electronically active polymers. Incorporation of a ladder-type constitution into these polymers represents a promising strategy to enhance the aforementioned properties from… read more here.

Keywords: electrochemical stability; ladder type; delocalization; ladder ... See more keywords