Results 31 to 40 of about 4,735 (210)

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

Beilstein 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, Nikita A. Kazin, Gennady L. Rusinov, Valery N. Charushin   +3 more
doaj   +1 more source

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

Molecules, 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, Zhi Wei Deng, Jing Xu, Zhu Feng Geng, Jiang Bin Feng, Kai Yang, Li Fan, Cheng Fang Wang, Hai Yan Jiang, Hai Bo Yin   +9 more
doaj   +1 more source

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

Molecules, 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, Alexander S. Bogachenkov, Valentine P. Ananikov   +2 more
doaj   +1 more source

Organic persistent room temperature phosphorescence enabled by carbazole impurity

Frontiers 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, Nguyen Le Phuoc, Mikko Linnolahti, Alexander S. Romanov   +3 more
doaj   +1 more source

Green sample preparation protocol for extraction of carbazoles from petroleum source rock

Heliyon
A new green method for extraction of carbazoles from petroleum source rocks was developed using surfactant solution. A three-level full factorial design of experiment (DoE) which involved extraction temperature, extraction time and concentration of ...
Akinsehinwa Akinlua, Kai Mangelsdorf
doaj   +1 more source

Synthetic routes for N-arylation of carbazole derivatives and their applications as organic materials

Journal of Saudi Chemical Society
Carbazole is a heterocyclic aromatic organic compound that has vast applications in pharmaceuticals, and in biological and material sciences. Carbazole derivatives show various biological activities such as antibiotic, anti-inflammatory, anti-tumor and ...
Sobia Mukhtar, Ayesha Rafiq, Syed Ali Raza Naqvi, Sana Aslam, Matloob Ahmad, Sami A. Al-Hussain, Magdi E.A. Zaki   +6 more
doaj   +1 more source

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

SynOpen, 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, Thiyagarajan Mageshwaran, Bose Muthu Ramalingam, Arasambattu K. Mohanakrishnan   +3 more
doaj   +1 more source

Exploring Pb‐Chelation Chemistry in the Crystallization Dynamics of Halide Perovskites

Advanced Functional Materials, EarlyView.
A mechanism of how Pb‐chelation chemistry governs coordination geometry and initial nucleation behavior at the precursor level of halide perovskite, by regulating the deprotonation state of a chelating additive, is elucidated. This allows for innovative reaction‐system design principles that promote coherent growth while suppressing defect formation in
Byeong Jun Kim, Inseo Cho, Jung Geon Son, Yifan Yu, Gunhee Kim, Eunseo Shin, Seyeon Eom, Minsub Um, Subeom Shin, Hyungju Ahn, Dong Suk Kim, Hochan Song, Hyosung Choi, Jonghee Yang   +13 more
wiley   +1 more source

Exciton Binding Energy of Phosphorescent Emitter Molecules in Organic Light‐Emitting Diodes

Advanced Functional Materials, EarlyView.
Energy level alignment is key to efficient OLED design, yet determining LUMO energies remains challenging. A methodology based on field‐induced dissociation and kinetic Monte Carlo simulations is presented to extract LUMO energies of iridium‐based phosphorescent emitters from their exciton binding energy.
Hiroki Tomita, Lucas R. L. Norg, Patrick Diederen, Clint van Hoesel, Christ H. L. Weijtens, Peter A. Bobbert, Reinder Coehoorn   +6 more
wiley   +1 more source

Designed Lewis Acid–Base Passivation for High Performance Perovskite Solar Cells

Advanced Functional Materials, EarlyView.
ABSTRACT Silicon's high cost and long energy payback time remain major barriers to the global expansion of solar power. In contrast, metal–halide perovskites offer abundant, solution‐processable absorbers, and have achieved efficiencies of 25%–30%, positioning them as strong competitors to silicon.
Afna Manaf, Hiba Shahulhameed, Bhabani Sankar Swain, Shengzhong (Frank) Liu, Adel Najar   +4 more
wiley   +1 more source