Results 41 to 50 of about 36,459 (348)

Nitration of 5,11-dihydroindolo[3,2-b]carbazoles and synthetic applications of their nitro-substituted derivatives

open access: yesBeilstein Journal of Organic Chemistry, 2017
A new general approach to double nitration of 6,12-di(hetero)aryl-substituted and 6,12-unsubstituted 5,11-dialkyl-5,11-dihydroindolo[3,2-b]carbazoles by acetyl nitrate has been developed to obtain their 2,8-dinitro and 6,12-dinitro derivatives ...
Roman A. Irgashev   +3 more
doaj   +1 more source

Cytotoxic Constituents from the Stems of Clausena lansium (Lour.) Skeels

open access: yesMolecules, 2013
Six compounds were isolated from the stems of Clausena lansium (Lour.) Skeels by repeated sillica gel column chromatography. Their chemical structures were elucidated on the basic of physicochemical and spectroscopic data.
Shu Shan Du   +9 more
doaj   +1 more source

9-[3-(Carbazol-9-yl)-5-methylphenyl]carbazole [PDF]

open access: yesActa Crystallographica Section E Structure Reports Online, 2013
The title compound, C31H22N2, crystallizes with two symmetry-independent mol-ecules in the asymmetric unit. The mol-ecules have slightly different conformations, the dihedral angles between the central phenyl ring and the carbazolyl groups being 56.29 (4) and 59.57 (4)° in one mol-ecule and 48.71 (4) and 65.47 (4)° in the other.
Jun Hee Kim   +3 more
openaire   +4 more sources

Vinylation of a Secondary Amine Core with Calcium Carbide for Efficient Post-Modification and Access to Polymeric Materials

open access: yesMolecules, 2018
We developed a simple and efficient strategy to access N-vinyl secondary amines of various naturally occurring materials using readily available solid acetylene reagents (calcium carbide, KF, and KOH).
Konstantin S. Rodygin   +2 more
doaj   +1 more source

Tuneable optical gain and broadband lasing driven in electrospun polymer fibers by high dye concentration [PDF]

open access: yes, 2023
The optical gain of blue light-emitting electrospun polystyrene fibers doped with a linear multi-fragment molecular dye based on the combination of fluorine-carbazole functional units is investigated, with the aim of correlating emission properties and the specific material architecture made of either aligned or disordered fibers.
arxiv   +1 more source

Organic persistent room temperature phosphorescence enabled by carbazole impurity

open access: yesFrontiers in Chemistry, 2023
The molecular design of metal-free organic phosphors is essential for realizing persistent room-temperature phosphorescence (pRTP) despite its spin-forbidden nature.
Alexander C. Brannan   +3 more
doaj   +1 more source

A photophysical and spectroelectrochemical study on N-phenyl-carbazoles and their oxidized species [PDF]

open access: yes, 2018
A series of N-phenyl-carbazole derivatives namely TCz (N-tolyl-carbazol), TCz-TCz (a 3,3´-linked dimer), and CzPh-CH2-PhCz (a methylene-bridged N-phenyl-carbazole), have been synthesized and studied by means of absorption and fluorescence spectra, DFT ...
Arbeloa, Ernesto Maximiliano   +4 more
core   +1 more source

Synthesis of 2,3-Disubstituted Carbazoles, Benzo[c]carbazoles, and Phenanthrenes Through FeCl3-Mediated Cyclization of Triene Frameworks

open access: yesSynOpen, 2018
A facile synthesis of 2,3-disubstituted carbazoles through electrocyclization of 2,3-divinylindoles using FeCl3 in DMF at reflux is reported. The methodology was found to be applicable for smooth transformation of 3-aryl-2-vinylindole as well as 2 ...
Potharaju Raju   +3 more
doaj   +1 more source

Molecular Orientations of Delayed Fluorescent Emitters in a Series of Carbazole-Based Host Materials

open access: yesFrontiers in Chemistry, 2020
Molecular orientation is one of the most crucial factors to boost the efficiency of organic light-emitting devices. However, active control of molecular orientation of the emitter molecule by the host molecule is rarely realized so far, and the ...
Hisahiro Sasabe   +16 more
doaj   +1 more source

3-(Trimethylsilylethynyl)carbazole

open access: yesActa Crystallographica Section E Structure Reports Online, 2003
The title compound, [Si(CH3)3(C14H8N)] is a TMS-protected mono-alkyne. It is used as a model species for platinum σ-acetyl­ide compounds of which it is a precursor. Such compounds are of interest due to the extended π-conjugation through the hetero-aromatic linker unit in the backbone.
Khan, M.S.   +4 more
openaire   +3 more sources

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