Structure–stability correlation of copolyimide membranes derived from aliphatic/alicyclic/aromatic diamine and aromatic dianhydrides
Sign Up to like & getrecommendations! Published in 2017 at "Journal of Applied Polymer Science"
DOI: 10.1002/app.45227
Abstract: New polyamic acids with -A-B-A-C- type periodic sequence of monomeric units (A derived from a diamine, B from benzophenone-3,3′,4,4′-tetracarboxylic dianhydride, and C from benzene-1,2,4,5-tetracarboxylic dianhydride) are prepared and transformed into polyimide membranes that are examined… read more here.
Keywords: diamine; alicyclic aromatic; structure stability; aliphatic alicyclic ... See more keywords
Selectivity Switch in the Aerobic 1,2‐Propandiol Oxidation Catalyzed by Diamine‐Stabilized Palladium Nanoparticles
Sign Up to like & getrecommendations! Published in 2021 at "ChemCatChem"
DOI: 10.1002/cctc.202100309
Abstract: Palladium nanoparticles stabilized by a sterically demanding secondary diamine ligand have been synthesized by hydrogen reduction of a palladium acetate complex bearing the corresponding diimine ligand. The obtained nanoparticles were used to catalyze the aerobic… read more here.
Keywords: palladium nanoparticles; oxidation; selectivity switch; diamine ... See more keywords
New bifunctional 1,3-diamine organocatalysts derived from (+)-camphoric acid for asymmetric Michael addition of 1,3-dicarbonyl compounds to nitroolefins.
Sign Up to like & getrecommendations! Published in 2022 at "Chirality"
DOI: 10.1002/chir.23424
Abstract: Novel 1,3-diamine-derived bifunctional thiourea and squaramide organocatalysts were synthesized from (+)-camphoric acid. These catalysts were easily obtained in up to two to five synthetic steps, in a flexible approach that facilitates their structure variation. Their… read more here.
Keywords: addition dicarbonyl; asymmetric michael; michael addition; camphoric acid ... See more keywords
A Diamine‐Oriented Biorefinery Concept Using Ammonia and Raney Ni as a Multifaceted Catalyst
Sign Up to like & getrecommendations! Published in 2022 at "Chemie-Ingenieur-Technik"
DOI: 10.1002/cite.202200091
Abstract: Abstract Diamines are important industrial chemicals. In this paper we outline the feasibility of lignocellulose as a source of diol‐containing molecules. We also illustrate the possibility of turning these diols into their diamines in good… read more here.
Keywords: raney; concept using; oriented biorefinery; biorefinery concept ... See more keywords
Fine-Tuning of the Carbon Dioxide Capture Capability of Diamine-Grafted Metal-Organic Framework Adsorbents Through Amine Functionalization.
Sign Up to like & getrecommendations! Published in 2017 at "ChemSusChem"
DOI: 10.1002/cssc.201601203
Abstract: A combined sonication and microwave irradiation procedure provides the most effective functionalization of ethylenediamine (en) and branched primary diamines of 1-methylethylenediamine (men) and 1,1-dimethylethylenediamine (den) onto the open metal sites of Mg2 (dobpdc) (1). The… read more here.
Keywords: fine tuning; capability; metal organic; metal ... See more keywords
Synthesis of a new diamine and its effect on the residual stress of colorless polyimide
Sign Up to like & getrecommendations! Published in 2018 at "Korean Journal of Chemical Engineering"
DOI: 10.1007/s11814-017-0289-5
Abstract: A new diamine was designed and synthesized to improve the flexibility of colorless polyimides by reducing residual stress. Four variations of colorless polyimides with the same dianhydride (4,4′-(hexafluoroisopropylidene)-diphthalic) and four different diamines (bis[4-(3-aminophenoxy)-phenyl] sulfone, bis(3-aminophenyl)… read more here.
Keywords: residual stress; diamine; colorless polyimide; new diamine ... See more keywords
Synthesis, spectral properties, crystal structure and theoretical calculations of a new geminal diamine: 2,2,2-Trichloro-N,N׳-bis(2-nitrophenyl)-ethane-1,1-diamine
Sign Up to like & getrecommendations! Published in 2021 at "Journal of Molecular Structure"
DOI: 10.1016/j.molstruc.2021.129976
Abstract: Abstract A new 2,2,2-trichloro-N,N׳-bis(2-nitrophenyl)-ethane-1,1-diamine was synthesized by the reaction of 2-nitroaniline in DCM with the chloral formed by distillation of chloral hydrate over concentrated H2SO4. The structure of the title compound was identified by means… read more here.
Keywords: nitrophenyl ethane; diamine; ethane diamine; structure ... See more keywords
Efficiency enhancement of green organic light-emitting diode utilizing aromatic diamine/bathocuproine multiple quantum wells
Sign Up to like & getrecommendations! Published in 2021 at "Optical Materials"
DOI: 10.1016/j.optmat.2021.111125
Abstract: Abstract Organic light-emitting diodes based on multiple-quantum-well (MQW) structures consisting of regular placement of N, N′-Di (1-naphthyl)-N, N′-diphenyl-(1,1′-biphenyl)-4,4′-diamine (NPB) and bathocuproine (BCP) layers have been fabricated. The findings show that the QWs structure can intensely… read more here.
Keywords: light emitting; diamine; organic light; quantum ... See more keywords
Mechanistic Complexity of Asymmetric Transfer Hydrogenation with Simple Mn–Diamine Catalysts
Sign Up to like & getrecommendations! Published in 2019 at "Organometallics"
DOI: 10.1021/acs.organomet.9b00457
Abstract: The catalytic asymmetric transfer hydrogenation (ATH) of ketones is a powerful methodology for the practical and efficient installation of chiral centers. Herein, we describe the synthesis, characterization, and catalytic application of a series of manganese… read more here.
Keywords: mechanistic complexity; diamine; asymmetric transfer; transfer hydrogenation ... See more keywords
Design of Ru(II)-NHC-Diamine Precatalysts Directed by Ligand Cooperation: Applications and Mechanistic Investigations for Asymmetric Hydrogenation
Sign Up to like & getrecommendations! Published in 2020 at "Journal of the American Chemical Society"
DOI: 10.1021/jacs.0c00985
Abstract: A modular synthesis of Ru(II)-NHC-diamine complexes from readily available chiral N-heterocyclic carbenes (NHCs) and chiral diamines is disclosed for the first time. The well-defined Ru(II)-NHC-diamine complexes show unique structure and coordination chemistry including an unusual… read more here.
Keywords: nhc diamine; asymmetric hydrogenation; design nhc; diamine ... See more keywords
Investigation of the Deprotonative Generation and Borylation of Diamine-Ligated α-Lithiated Carbamates and Benzoates by in Situ IR spectroscopy.
Sign Up to like & getrecommendations! Published in 2018 at "Journal of the American Chemical Society"
DOI: 10.1021/jacs.8b06871
Abstract: Diamine-mediated α-deprotonation of O-alkyl carbamates or benzoates with alkyllithium reagents, trapping of the carbanion with organoboron compounds, and 1,2-metalate rearrangement of the resulting boronate complex are the primary steps by which organoboron compounds can be… read more here.
Keywords: diamine ligated; situ spectroscopy; ligated lithiated; carbamates benzoates ... See more keywords