Results 31 to 40 of about 4,123 (167)

Molecular Topology and the Surface Chemical Bond: Alternant Versus Nonalternant Aromatic Systems as Functional Structural Elements

Physical Review X, 2019
The interaction of carbon-based aromatic molecules and nanostructures with metals can strongly depend on the topology of their π-electron systems. This is shown with a model system using the isomers azulene, which has a nonalternant π system with a 5-7 ...
Benedikt P. Klein, Nadine J. van der Heijden, Stefan R. Kachel, Markus Franke, Claudio K. Krug, Katharina K. Greulich, Lukas Ruppenthal, Philipp Müller, Phil Rosenow, Shayan Parhizkar, François C. Bocquet, Martin Schmid, Wolfgang Hieringer, Reinhard J. Maurer, Ralf Tonner, Christian Kumpf, Ingmar Swart, J. Michael Gottfried   +17 more
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Azulene-based Protecting Groups

, 2016
Protecting groups form an indispensable part of modern organic synthetic chemistry. Besides the benefits of selectively passivating certain reactive functionalities, they often provide handling benefits – such as a decrease in the polarity of the ...
Bevan, Thomas (11677582), Bevan, Thomas
core   +1 more source

‐Azulene

, 2021
International audienceAzulene is stabilized by “zwitterionic aromaticity”, what about its ring carbo-mer? The greater dipole moment of the latter is oriented in the opposite direction, while providing an enhanced zwitterionic aromatic character ...
Maraval, Valérie, Juliane Heitkämper, Remi Chauvin, Chauvin, Remi, Heitkämper, Juliane, Poater, Albert, Albert Poater, Jordi Poater, Poater, Jordi, Valérie Maraval   +9 more
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Zur Kenntnis der Azulene, V. Die Nucleophile Substitution des Azulens [PDF]

, 2022
Ebenso wie in 4- und 8-Stellung können Azulene auch an C-6 nucleophil substituiert werden. 4.8-Disubstituierte Azulene addieren alkalimetallorganische Verbindungen unter Bildung von 4.6.8-trisubstituierten Azuleniat-Salzen, die sich leicht in die ...
Hafner, Klaus, Bernhard, Claus, Müller, Reinhold   +2 more
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Structure–property relationships of azulene-fused tryptanthrin π-systems: impact of fusion mode and dicyanomethylidene substitution

Tetrahedron Chem
Structurally distinct azulene-fused tryptanthrin analogs were synthesized to investigate how the fusion mode of the azulene unit affects the electronic structure and physicochemical properties of tryptanthrin-based π-conjugated systems. The corresponding
Ryuta Sekiguchi, Yuhei Nakazawa, Ikumi Uchiyama, Taku Shoji, Shunji Ito   +4 more
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The synthesis and antiviral activity of 1-(4-сhlorophenyl)-4-(para-tolyl)-5,6,7,8-tetrahydro-2а,4a-diazacyclopenta[cd]-azulene-2-carboxylic acid derivatives

Журнал органічної та фармацевтичної хімії, 2019
Aim. To synthesize, prove the structural framework and study the antiviral activity of 1-(4-chlorophenyl)-4-(para-tolyl)-5,6,7,8-tetrahydro-2a,4a-diazacyclopenta[cd]azulene-2-carboxylic acid derivatives. Results and discussion. The antiviral activity of
Serhii A. Demchenko, Yuliia A. Fedchenkova, Volodymyr V. Sukhoveev, O. S. Bagreeva, Anatolii M. Demchenko   +4 more
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Merging of Azulene and Perylene Diimide for Optical pH Sensors

Molecules, 2023
Polycyclic aromatic hydrocarbons (PAHs) have emerged as promising materials for organic electronics, including organic photovoltaics (OPVs), organic field-effect transistors (OFETs), and organic light-emitting diodes (OLEDs).
Ping Zhou, Ulrich Aschauer, Silvio Decurtins, Thomas Feurer, Robert Häner, Shi-Xia Liu   +5 more
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Local probe-induced structural isomerization in a one-dimensional molecular array

Nature Communications, 2023
Synthesis of one-dimensional molecular arrays with tailored stereoisomers is challenging yet has great potential for application in molecular opto-, electronic- and magnetic-devices, where the local array structure plays a decisive role in the functional
Shigeki Kawai, Orlando J. Silveira, Lauri Kurki, Zhangyu Yuan, Tomohiko Nishiuchi, Takuya Kodama, Kewei Sun, Oscar Custance, Jose L. Lado, Takashi Kubo, Adam S. Foster   +10 more
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Bis(3-methylthio-1-azulenyl)phenylmethyl Cations and Dications Connected by a 1,4-Phenylene Spacer: Synthesis and Their Electrochemical Properties

Organics, 2022
The preparation of bis(3-methylthio-1-azulenyl)phenylmethyl cations and 1,4-phenylenebis[bis(3,6-di-tert-butyl-1-azulenyl)methyl] dications was accomplished by the hydride abstraction of the corresponding hydride derivatives, which were synthesized by ...
Taku Shoji, Naoko Sakata, Ryuta Sekiguchi, Shunji Ito   +3 more
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Introduction of Electron Donor Groups into the Azulene Structure: The Appearance of Intense Absorption and Emission in the Visible Region

Molecules
In this work, through the Suzuki–Miyaura cross-coupling reaction with high yields, new π-conjugated azulene compounds containing diphenylaniline groups at positions 2 and 6 of azulene were synthesized. The obtained diphenylaniline–azulenes have intensely
Nurlan Merkhatuly, Ablaykhan Iskanderov, Saltanat Abeuova, Amantay Iskanderov, Saltanat Zhokizhanova   +4 more
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