Results 61 to 70 of about 504,742 (339)

A one-pot protocol for iron-catalyzed decarbonylative borylation of aryl and alkyl carboxylic acids

open access: yesSTAR Protocols, 2022
Summary: We present a protocol for the eco-friendly synthesis of aryl and alkyl boronic esters from aryl and alkyl carboxylic acids. We describe steps for aryl and alkyl carboxylates preparation.
Mei Bai   +4 more
doaj   +1 more source

Fire-resistant phosphorus containing polyimides and copolyimides [PDF]

open access: yes, 1985
Phosphorus-containing polyimides and copolyimides are synthesized in a two-step polycondensation reaction from 1- (diorganooxyphosphonl)methly 2,4- and 2,6-diaminobenzenes and tetracarboxylic anhydride. The diorgano position of the diorganooxyphosphonyl
Mikroyannidis, J. A.
core   +1 more source

Poly(1-vinyl-1,2,4-triazolium) poly(ionic liquid)s: synthesis and the unique behavior in loading metal ions

open access: yes, 2016
Herein we report the synthesis of a series of poly(4-alkyl-1-vinyl-1,2,4-triazolium) poly(ionic liquid)s either via straightforward free radical polymerization of their corresponding ionic liquid monomers, or via anion metathesis of the polymer ...
Yuan, Jiayin, Zhang, Weiyi
core   +1 more source

Poly(2-oxazolines) in biological and biomedical application contexts. [PDF]

open access: yes, 2007
Polyoxazolines of various architectures and chemical functionalities can be prepared in a living and therefore controlled manner via cationic ring-opening polymerisation.
Adams, Nico, Schubert, Ulrich S
core   +1 more source

Emergence of Light‐Transforming Layered Hybrid Halide Perovskites

open access: yesAdvanced Functional Materials, EarlyView.
The emerging class of light‐transforming layered halide perovskite materials is reviewed, outlining challenges for their development and perspectives toward application in the future. Abstract Layered hybrid halide perovskites (LHPs) have attracted considerable attention in optoelectronics.
Ghewa AlSabeh, Jovana V. Milić
wiley   +1 more source

Synthesis and Biological Evaluation of N-Alkyl-3-(alkylamino)-pyrazine-2-carboxamides

open access: yesMolecules, 2015
A series of N-alkyl-3-(alkylamino)pyrazine-2-carboxamides and their N-alkyl-3-chloropyrazine-2-carboxamide precursors were prepared. All compounds were characterized by analytical methods and tested for antimicrobial and antiviral activity.
Lucia Semelkova   +11 more
doaj   +1 more source

Generation of non-stabilized alkyl radicals from thianthrenium salts for C–B and C–C bond formation

open access: yesNature Communications, 2021
The generation of non-stabilized alkyl radicals from sulfonium salts has been a challenge for several decades. Here, the authors show the treatment of S-(alkyl) thianthrenium salts, which can generate non-stabilized alkyl radicals as key intermediates ...
Cheng Chen   +4 more
doaj   +1 more source

Process for the preparation of fluorine containing crosslinked elastomeric polytriazine and product so produced [PDF]

open access: yes, 1980
Crosslinking elastomeric polytriazines are prepared by a 4 step procedure which consists of (1) forming a poly(imidoylamidine) by the reaction, under reflux conditions, of anhydrous ammonia with certain perfluorinated alkyl or alkylether dinitriles; (2 ...
Korus, R. A., Rosser, R. W.
core   +1 more source

The Relation between Packing Effects and Solid State Fluorescence of Dyes [PDF]

open access: yes, 1991
The solid state fluorescence of diketopyrrolopyrrole dyes and perylene-3,4:9,10- tetracarboxylic bisimides with alkyl substituents are investigated and compared with noncovalent interactions.
Aubert   +25 more
core   +1 more source

Backbone Heterojunction Photocatalysts for Efficient Sacrificial Hydrogen Production

open access: yesAdvanced Functional Materials, EarlyView.
Herein, a ‘single‐component’ organic semiconductor photocatalyst is presented in which a molecular donor is bonded to a polymer acceptor. The resultant material demonstrates exceptional photocatalytic activity for hydrogen evolution in aqueous triethylamine with an outstanding external quantum efficiency of 38% at 420 nm.
Richard J. Lyons   +11 more
wiley   +1 more source

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