Results 41 to 50 of about 96,191 (265)

A study of the thermally-induced cyclisations of some polyfluoroaromatic hydrazones leading to Fischer indole products [PDF]

, 1983
Previously acetophenone 1,3,4,5,6,7,8-heptafluoro-2-naphthylhydrazone and acetophenone pentafluorophenylhydrazone were reported to react in tetralin at reflux temperature to give among the products 4,5,6,7,8,9- hexafluoro-2-phenylbenz[ e ]indole and 4,5 ...
Benke, Frank Dominic
core  

Step‐Edge Functionalization by N‐Heterocyclic Carbenes Enhances Catalytic Activity in Electrochemical CO2 Reduction

Advanced Materials, EarlyView.
Atomically precise functionalization by N‐heterocyclic carbenes enhances the catalytic efficiency of macroscopically defined step edges toward electrochemical CO2${\rm CO}_2$ reduction. Sub‐molecular imaging reveals conformational differences between specific NHCs, which can be correlated with their catalytic performance. Photoelectron spectroscopy and
Philipp Wiesener, Ankita Das, Elena Kolodzeiski, Duong Tran, Ying Pan, Harald Fuchs, Nieves López‐Salas, Saeed Amirjalayer, Frank Glorius, Harry Mönig   +9 more
wiley   +1 more source

Uso de una mezcla dioxane/MeOH/NaBH4 en caliente como un medio conveniente para la reducción química selectiva del doble enlace C=C en sistemas α,β-insaturados

Revista de la Academia Colombiana de Ciencias Exactas, Físicas y Naturales, 2021
Productos de Knoevenagel diversamente sustituidos fueron sometidos a reducción con una solución de NaBH4 en MeOH/p-dioxano a 70 oC. A través de este proceso, se alcanzó la reducción selectiva de sus dobles enlaces C=C en todos los casos. Las condiciones
Rodrigo Abonia, Andres C. García
doaj   +1 more source

Light Switchable Ionic Conductivity of Arylazopyrazole Modified Polysiloxanes

Advanced Materials Technologies, EarlyView.
We present a polysiloxane functionalized with a novel arylazopyrazole dye that undergoes reversible photoisomerization. Upon lithium bis(trifluoromethanesulfonyl)imide addition and UV irradiation, the polymer exhibits a shift in tan(d) toward higher frequencies and enhanced ionic conductivity.
Malte S. Beccard, Thulasinath Raman Venkatesan, Michael Bauer, Valentin Razvan Lupu, Philipp Scheidegger, Francesco Taddei, Frank A. Nüesch, Dorina M. Opris   +7 more
wiley   +1 more source

Ultrasound-assisted green synthesis of 1,4-disubstituted 1,2,3-triazoles using natural polymer supports

Scientific Reports
The advent of click chemistry has significantly accelerated the synthesis of 1,2,3-triazoles, key structures found in numerous biologically active and pharmaceutical compounds.
Khatereh Haseli, Maryam Esmkhani, Shahrzad Javanshir   +2 more
doaj   +1 more source

5-(5-Bromo-2-hydroxy-3-methoxyphenyl)-7-methyl-4,5,6,7-tetrahydro[1,2,4]triazolo[1,5-a]pyrimidin-7-ol

Molbank, 2016
The title compound was synthesized by multicomponent condensation of 3-amino-1,2,4-triazole, acetone and 5-bromo-2-hydroxy-3-methoxybenzaldehyde. The structure was established by 1H-NMR, 13C-NMR, IR spectroscopy and LC-MS.
Michael Kondratiuk, Nikolay Yu. Gorobets, Yuriy V. Sedash, Mustafa K. Gümüş, Sergey M. Desenko   +4 more
doaj   +1 more source

Shaping Carbon Nitrides for Advanced Macrostructures

Advanced Materials Technologies, EarlyView.
This review examines how carbon nitride can be shaped through a range of printing and interfacial assembly methods. By bringing together additive manufacturing and liquid–liquid structuring concepts, carbon nitride is moving beyond its traditional powder‐based photocatalyst form toward digitally designed robust macroscale architectures with high design
Simona Baluchová, Baris Kumru
wiley   +1 more source

Colchiceine Complexes with Lithium, Sodium and Potassium Salts − Spectroscopic Studies

Croatica Chemica Acta, 2016
Colchiceine complexes with Li+, Na+ and K+ cations have been synthesized and studied by 1H and 13C NMR, FT-IR, FAB MS and UV-Vis. It has been shown that colchiceine forms stable complexes especially with lithium cation and the most stable structures of ...
Joanna Kurek, Piotr Barczyński
doaj   +1 more source

The Evolution of Aerosol Jet Printing, A Review: Enhancing Material Versatility and Improvements for Next‐Generation Applications

Advanced Materials Technologies, EarlyView.
Aerosol Jet Printing (AJP) has emerged as a versatile additive manufacturing technique for high‐resolution, conformal, and multi‐material printing. This review highlights advances in printable materials, substrate compatibility, post‐processing, characterization, and process innovations, while critically discussing current challenges and future ...
Chandrachur Chatterjee, Rocco Lupoi, Michael J. Gibbons   +2 more
wiley   +1 more source

Preparation of magnetic decorated polyacrylonitrile-grafted chitosan as a new bio-inspired nanocatalyst for the synthesis of dihydropyrano[2,3-c]pyrazole and 2-amino-3-cyano-4H-pyran derivatives

Scientific Reports
This research reports a novel magnetized polyacrylonitrile-modified chitosan (CS-g-PAN/Fe3O4) nanomaterial, as a heterogeneous catalyst, for multicomponent reactions (MCRs). Appropriate characterization using techniques such as Fourier transform infrared
Niloufar Nashibi, Mohammad G. Dekamin, Ali Maleki   +2 more
doaj   +1 more source