Articles with "sterically hindered" as a keyword



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Strategically Modulating Carriers and Excitons for Efficient and Stable Ultrapure‐Green Fluorescent OLEDs with a Sterically Hindered BODIPY Dopant

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Published in 2020 at "Advanced Optical Materials"

DOI: 10.1002/adom.202000483

Abstract: Ultrapure colors are vital for displays to obtain the highly desired wide color‐gamut. Till now, only boron‐dipyrromethene derivatives (BODIPYs) have demonstrated ultrapure full‐colors but suffer from low excitons utilization efficiency as dopants in organic light‐emitting… read more here.

Keywords: carriers excitons; hindered bodipy; modulating carriers; ultrapure green ... See more keywords
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Multinuclear compounds of s-elements with sterically hindered о-semiquinonates and catecholates

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Published in 2018 at "Russian Chemical Bulletin"

DOI: 10.1007/s11172-018-2038-2

Abstract: Alkali metals form mutinuclear compounds with redox-active singly and doubly reduced derivatives of sterically of hindered о-benzoquinones. Complexes [Na6(Cat)3(THF)7]•4THF, [Na5(Cat)2(SQ)(THF)5], [Na4(SQ)4(THF)4]•THF•C6H14, [Na4(3,5-SQ)4(THF)4], [K4(SQ)4(THF)4]•4THF and [Li3(SQ)3(THF)3]•THF (Cat is catecholate, SQ is semiquinonate) possessing high sensitivity to… read more here.

Keywords: elements sterically; thf thf; sterically hindered; thf ... See more keywords
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Sterically hindered tetrylenes based on new 1,10-phenanthroline-containing diols: initiators for ε-caprolactone polymerization

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Published in 2019 at "Russian Chemical Bulletin"

DOI: 10.1007/s11172-019-2396-4

Abstract: Previously unknown tetradentate ONNO-type ligands 1–5 (4,7-di(4-R´-phenoxy)-2,9- di(HOCR2CH)-1,10-phenanthrolines (R´ = Me, R–R = –(CH2)5– (1), R = Me (2), R–R = 2,2-adamantylene (3); R´ = But, R–R = –(CH2)5– (4), R = Me (5)) were… read more here.

Keywords: caprolactone polymerization; sterically hindered; phenanthroline; adamantylene ch2 ... See more keywords
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Delivery nanosystems based on sterically hindered phenol derivatives containing a quaternary ammonium moiety: Synthesis, cholinesterase inhibition and antioxidant activity.

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Published in 2019 at "Chemico-biological interactions"

DOI: 10.1016/j.cbi.2019.108753

Abstract: Multitarget ligands (MTL) based on sterically hindered phenol and containing a quaternary ammonium moiety (SHP-n-Q) were synthesized. These compounds are inhibitors of cholinesterases with antioxidant properties. The inhibitory selectivity is 10-fold potent for BChE than… read more here.

Keywords: sterically hindered; hindered phenol; containing quaternary; based sterically ... See more keywords
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Metal-centered redox activity in a polymeric Cobalt(II) complex of a sterically hindered salen type ligand

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Published in 2020 at "Electrochimica Acta"

DOI: 10.1016/j.electacta.2020.136496

Abstract: Abstract This paper reports on the peculiarities of the metal-centered redox activity in a polymeric cobalt(II) complex of a sterically hindered tetradentate N2O2 Schiff base (salen type) ligand. A Co(III)/Co(II) redox process in the polymer… read more here.

Keywords: redox activity; redox; sterically hindered; metal centered ... See more keywords
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New sterically hindered bis-catechol, bis- o -quinone and its bis-triphenylantimony(v) bis-catecholate. 3,5-Di- tert -butyl-6-methoxymethylcatechol as alkylating agent

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Published in 2018 at "Mendeleev Communications"

DOI: 10.1016/j.mencom.2018.01.025

Abstract: Alkylation of 1,3,5-trimethoxybenzene with 3,5-di-tert-butyl-6-methoxymethylcatechol affords new sterically hindered biscatechol, whose oxidation gives the corresponding bis-o-quinone. Its treatment with triphenylstibine leads to bis-triphenylantimony(v) bis-catecholate. read more here.

Keywords: bis quinone; new sterically; sterically hindered; tert butyl ... See more keywords
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Trans-etherification of catechol-type benzylic ether with diols as a route to new sterically hindered bis-catechols

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Published in 2019 at "Mendeleev Communications"

DOI: 10.1016/j.mencom.2019.01.031

Abstract: The trans-etherification of 4,6-di-tert-butyl-2,3-dihydroxybenzyl methyl ether with α,ω-alkanediols under mild conditions (CHCl3, 65 °C) leads to new sterically hindered biscatechols in high yields. The molecular structures of three of them was determined by single-crystal X-ray diffraction. read more here.

Keywords: ether; trans etherification; new sterically; catechol type ... See more keywords
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The development of reaction kinetics for CO2 absorption into novel solvent systems: Frustrated Lewis pairs (FLPs)

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Published in 2020 at "Separation and Purification Technology"

DOI: 10.1016/j.seppur.2020.117450

Abstract: Abstract Frustrated Lewis Pairs (FLPs) comprising sterically hindered Lewis acids and bases were developed and kinetic parameters for the homogenous reaction between CO2 and FLP dissolved in bromobenzene were obtained by using the stopped-flow method… read more here.

Keywords: lewis pairs; hindered lewis; sterically hindered; pairs flps ... See more keywords
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Regioselective preferential CH activation of sterically hindered 1,3-dienes over [4+2] cycloaddition

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Published in 2017 at "Tetrahedron"

DOI: 10.1016/j.tet.2017.03.028

Abstract: The study of Pd-catalyzed preferential CH activation of sterically hindered α, β-olefinic indoles onto alkenes beyond [4 + 2] cycloaddition has been described. The carbazole derivatives were readily synthesized via activation of vinylic CH bonds with excellent… read more here.

Keywords: cycloaddition; regioselective preferential; sterically hindered; activation ... See more keywords
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β,γ-trans-selective γ-butyrolactone formation via homoenolate cross-annulation of enals and aldehydes catalyzed by sterically hindered N-heterocyclic carbene

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Published in 2021 at "Tetrahedron"

DOI: 10.1016/j.tet.2021.132191

Abstract: Abstract Highly sterically hindered N-heterocyclic carbenes (NHCs), can be readily prepared from the corresponding anilines, and serve as organocatalysts in NHC-catalyzed homoenolate cross-annulation of α,β-enals and aryl aldehydes. This catalysis enables the convergent construction of… read more here.

Keywords: annulation enals; homoenolate cross; hindered heterocyclic; cross annulation ... See more keywords
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Sterically Hindered Diarylethenes with a Benzobis(thiadiazole) Bridge: Enantiospecific Transformation and Reversible Photosuperstructures.

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Published in 2022 at "Accounts of chemical research"

DOI: 10.1021/acs.accounts.2c00419

Abstract: ConspectusPhotochromic diarylethenes featuring reversible regulation by external light irradiation have attracted increasing attention in versatile applications such as logic gates, supramolecular systems, liquid crystals, and super-resolution imaging because of their outstanding bistability and fatigue resistance.… read more here.

Keywords: enantiospecific transformation; diarylethene; bridge; benzobis thiadiazole ... See more keywords