Results 111 to 120 of about 5,238 (190)

Nemkirális építőelemekből álló polárosan rendezett folyadékkristályok = Mesogens with polar ordering of non-chiral building blocks [PDF]

open access: yes, 2011
A pályázat munkatervében körvonalazott kutatási tervnek megfelelően a munka több szálon futott. Első lépést a vegyületek kémiai szintézise jelentette, ami a vizsgálni kívánt molekulaszerkezetű vegyületek megtervezését, a szintézisút kidolgozását és magát
Buka, Ágnes   +5 more
core  

Two‐Stage, Sequential Aryne Carboiodanation Enabled by Mesomeric Priming

open access: yesAdvanced Synthesis &Catalysis, Volume 368, Issue 9, 5 May 2026.
Two‐stage, sequential insertion of arynes into the carbon–iodine(III) bond of benziodoxole (BX) compounds is achieved by judicious choice of the BX/aryne pair in the first step, generating a mesomerically activated aryl‐BX primed for a second, discrete aryne insertion. This metal‐free strategy enables programed access to biaryl‐BXs and modular entry to
Shunya Morohashi   +3 more
wiley   +1 more source

Preparation of 4-thia-10b-azaindeno[2,1,7-lma]fluorenes

open access: yesARKIVOC, 2002
David H. Reid, ( ) John G. Dingwall
doaj   +1 more source

Design, Synthesis, and Structural Analysis of Binaphthyl‐Based Chiral Benzindenes

open access: yesAdvanced Synthesis &Catalysis, Volume 368, Issue 9, 5 May 2026.
This work explores the synthetic endeavors in constructing the first‐of‐a‐kind axially chiral benz[f]indenes as potential chiral ligands. The overall synthetic pathway spans across 9 steps with 15.9% overall yield. Challenges in constructing modified analogs as well as metal complexes are discussed. Chiral benzindenes are an unexplored structural motif
Marko Gobin, Nikola Topolovčan
wiley   +1 more source

Chemical research projects office: An overview and bibliography, 1975-1980 [PDF]

open access: yes
The activities of the Chemical Research Projects Office at Ames Research Center, Moffett Field, California are reported. The office conducts basic and applied research in the fields of polymer chemistry, computational chemistry, polymer physics, and ...
Heimbuch, A. H.   +2 more
core   +1 more source

Game of Frontier Orbitals: A View on the Rational Design of Novel Charge-Transfer Materials [PDF]

open access: yes, 2018
Since the first application of frontier molecular orbitals (FMOs) to rationalize stereospecificity of pericyclic reactions, FMOs have remained at the forefront of chemical theory.
Ivanov, Maxim Vadimovich   +2 more
core   +1 more source

A Cathodic Hydrogen Atom Transfer Strategy for Electrochemical Carboxylation of Dibenzylic C(sp3)H Bonds With CO2

open access: yesChemElectroChem, Volume 13, Issue 9, 5 May 2026.
A cathodically generated hydrogen atom transfer (HAT) strategy for the electrochemical carboxylation of dibenzylic C(sp3)H bonds with CO2 is developed. This strategy enables all key steps to occur at the same cathode, allowing efficient carboxylation under mild conditions.
Yuto Maeji   +7 more
wiley   +1 more source

Aromatic/aliphatic diamine derivatives for advanced compositions and polymers [PDF]

open access: yes, 2010
Novel compositions of matter comprise certain derivatives of 9,9-dialkyl fluorene diamine (AFDA). The resultant compositions, whether compositions of matter or monomers that are subsequently incorporated into a polymer, are unique and useful in a variety
Connell, John W.   +3 more
core   +1 more source

Multiscale Structuring of Hydroxyapatite via Two‐Photon Lithography of Nanocomposites

open access: yesAdvanced Functional Materials, Volume 36, Issue 36, 4 May 2026.
Hydroxyapatite scaffolds are of great interest in bone tissue engineering applications, ranging from 3D cell culture to regenerative medicine. Using two‐photon lithography of a transparent nanocomposite, hydroxyapatite microstructures with features ranging from submicron to centimeter‐scale are fabricated. This allows to mimic the natural bone geometry,
Leonhard Hambitzer   +6 more
wiley   +1 more source

The Insoluble Carbonaceous Material of CM Chondrites as Possible Source of Discrete Organics During the Asteroidal Aqueous Phase [PDF]

open access: yes
The larger portion of the organic carbon in carbonaceous chondrites (CC) is present as a complex and heterogeneous macromolecular material that is insoluble in acids and most solvents (IOM). So far, it has been analyzed only as a whole by microscopy (TEM)
Cody, G.   +3 more
core   +1 more source

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