Results 71 to 80 of about 29,373 (276)

Brominated graphitized carbon fibers [PDF]

open access: yes, 1991
Low cost, high break elongation graphitized carbon fibers having low degree of graphitization are inert to bromine at room or higher temperatures, but are brominated at -7 to 20 C, and then debrominated at ambient.
Hung, Ching-Cheh
core   +1 more source

Spin and Charge Control of Topological End States in Chiral Graphene Nanoribbons on a 2D Ferromagnet

open access: yesAdvanced Materials, EarlyView.
Chiral graphene nanoribbons on a ferromagnetic gadolinium‐gold surface alloy display tunable spin and charge states at their termini. Atomic work function variations and exchange fields enabe transitions between singlet, doublet, and triplet configurations.
Leonard Edens   +8 more
wiley   +1 more source

Occurrence of Acrylamide in Italian Baked Products and Dietary Exposure Assessment

open access: yesMolecules, 2020
Acrylamide (AA) is a neo-formed toxic compound that develops in foods during cooking at temperatures above 120 °C. AA shows in vivo neurotoxic and carcinogenic effects, and it is potentially carcinogenic for humans. Its occurrence is common in baked food,
Francesco Esposito   +4 more
doaj   +1 more source

Transmission Infrared Spectra of CH_3-, CD_3-, and C_(10)H_(21)-Ge(111) Surfaces [PDF]

open access: yes, 2011
The surface chemistry of CH_3–, CD_3–, and C_(10)H_(21)–Ge(111) surfaces prepared through a bromination/alkylation method have been investigated by infrared spectroscopy. Well-ordered CH_3–Ge(111) surfaces could be prepared only if, prior to bromination,
Brunschwig, Bruce S.   +2 more
core   +1 more source

Structural factors controlling the transition between columnar hexagonal and helical mesophase in triphenylene liquid crystals. [PDF]

open access: yes, 2001
A series of novel triphenylenes has been synthesised by a combination of palladium catalysed coupling, oxidative cyclisation, bromination and nucleophilic aromatic substitution.
Cammidge, Andrew N, Gopee, Hemant
core   +1 more source

Functional Metal Complexes for Solar–Light‐Driven Energy Conversion

open access: yesAdvanced Materials, EarlyView.
This review provides an exhaustive summary of the recent advancements of functional metal complexes in solar‐to‐electrical, ‐chemical, and ‐thermal energy conversion, comprising material categories, design strategies, underlying principles of operation, and identified improvement of performances.
Yanyan Qin   +3 more
wiley   +1 more source

Synthesis, Reactions and Antimicrobial Activities of 8-Ethoxycoumarin Derivatives

open access: yesMolecules, 2012
Condensation of 3-acetyl-8-ethoxycoumarin (3) with thiosemicarbazide gave ethylidenehydrazinecarbothioamide 5, which was transformed into the thiazolidin-4-one derivatives 6,7. Interaction of 3 with DMF/POCl3 gave b-chloroacroline derivative 8. Treatment
Mostafa M. Khafagy   +6 more
doaj   +1 more source

Domino alkylation-cyclization reaction of propargyl bromides with thioureas/thiopyrimidinones: A new facile synthesis of 2-aminothiazoles and 5H-thiazolo[3,2-a]pyrimidin-5-ones [PDF]

open access: yes, 2009
A new synthesis of 2-aminothiazoles and 5H-thiazolo[3,2-a]pyrimidin-5-ones was developed as a domino alkylation-cyclization reaction of propargyl bromides with thioureas and thio¬pyrimidinones, respectively.
Bernardini, Martina   +3 more
core   +1 more source

Photoresponsive Adaptive Reconfiguration of Single‐Atom Interface With Intermittent Light and Soft Ionic Lattices

open access: yesAdvanced Materials, EarlyView.
We present a photoresponsive platform that integrates SACs with halide perovskite supports, turning perovskite ion mobility, typically a stability concern, into a functional mechanism for light‐regulated self‐repair and reversible atomic reconfiguration. Adaptive metal‐support interactions are established through bandgap‐funnel engineering and the soft
Li Yu   +10 more
wiley   +1 more source

A new protocol for the synthesis of 4,7,12,15-tetrachloro[2.2]paracyclophane

open access: yesBeilstein Journal of Organic Chemistry, 2016
We report a green and convenient protocol to prepare 4,7,12,15-tetrachloro[2.2]paracyclophane, the precursor of parylene D, from 2,5-dichloro-p-xylene. In the first bromination step, with H2O2–HBr as a bromide source, this procedure becomes organic-waste-
Donghui Pan, Yanbin Wang, Guomin Xiao
doaj   +1 more source

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