Results 41 to 50 of about 3,698 (187)

Excited‐State Antiaromaticity in Nonbenzenoid Aromatics: Examining the Dynamics of Intramolecular Proton Transfer With a Small Driving Force

Angewandte Chemie, Volume 138, Issue 33, 10 August 2026.
The excited‐state antiaromaticity of hydroxybenzotropyliums (HBTs) can be tuned through substituent effects to bring the aromatic ‘enol’ (E) and keto (K) tautomers close in energy. This leads to abnormally slow excited‐state proton transfer (on the ns timescale), giving rise to dual fluorescence emission and weak photoacidity.
Promeet K. Saha, Charlotte A. Bardsley, Hector G. Miranda‐Salinas, Daniel Crane, Rabia Ayub, Andrew P. Monkman, Paul R. McGonigal   +6 more
wiley   +2 more sources

Oxidation of [3]naphthylenes to cations and dications converts local paratropicity into global diatropicity

Beilstein Journal of Organic Chemistry
Oxidized states of polycyclic aromatic hydrocarbons are of importance as they represent charged conductive species in organic semiconductor substrates. In this work, we investigated the properties of radical cations and dications of linear and angular [3]
Abel Cárdenas, Zexin Jin, Yong Ni, Jishan Wu, Yan Xia, Francisco Javier Ramírez, Juan Casado   +6 more
doaj   +1 more source

Atom Swapping Reaction on Diborylcarbenoid: Synthesis and Electronic Structure of Inorganic Chalcogenophene Analogues

Chemistry – A European Journal, EarlyView.
ABSTRACT Inorganic analogues of aromatic compounds, wherein C═C bonds are replaced with B─N bonds, are isoelectronic with the original aromatic compounds, however, they can show different properties. While borazine, an inorganic analogue of benzene, has been well‐studied, inorganic analogues of chalcogenophene have been less explored.
Yuki Shibutani, Momoko Inaoka, Shuhei Kusumoto, Kyoko Nozaki   +3 more
wiley   +1 more source

SARS-CoV-2 lineage-dependent temporal phylogenetic distribution and viral load in immunocompromised and immunocompetent individuals

Virology Journal
Objectives Mutational dynamics of SARS-CoV-2 in immunocompromised hosts, although well documented, remain a relatively unexplored mechanism. This study aims to compare the viral replication load and genetic diversity of SARS-CoV-2 in immunocompromised ...
Karen Zafilaza, Antoine Fauchois, Valentin Leducq, Romain Coppée, Romane Guilbaud, Anna-Maria Franco Yusti, Eve Todesco, Antoine Bridier-Nahmias, Quentin Le Hingrat, Sylvain Choquet, Patrice Cacoub, Zahir Amoura, Benoit Barrou, Valérie Pourcher, Jean-Philippe Spano, Martine Louet, Laura kramer, Tiphaine Goulenok, Mathilde Salpin, Eric Daugas, Richard Dorent, Sébastien ottaviani, Gérard Zalcman, Jade Ghosn, Charlotte Charpentier, Diane Descamps, Anne-Geneviève Marcelin, Vincent Calvez, Valentine Marie Ferre, Stéphane Marot, Cathia Soulie   +30 more
doaj   +1 more source

A review of the ever increasing threat to European crayfish from non-indigenous crayfish species [PDF]

Knowledge and Management of Aquatic Ecosystems, 2009
Non-indigenous crayfish species (NICS) in Europe now outnumber indigenous crayfish species (ICS) 2:1, and it has been predicted that they may dominate completely in the next few decades unless something is done to protect them. Of the ten NICS introduced
D.M. Holdich, J.D. Reynolds, C. Souty-Grosset, P.J. Sibley   +3 more
doaj  

Post‐Modification of Tripyrenylenes to Enantiopure π‐Extended D3‐Symmetric Propellers

Chemistry – A European Journal, EarlyView.
The post‐modification of tripyrenylenes to π‐extended enantiopure propellers with tris‐phenanthrophenazines is presented and the chiroptical properties as well as the solid‐state packings investigated in comparison to the corresponding racemic mixtures.
Dennis Popp, Melanie Bruttel, Sebastian Möbert, Anusha Sounder Rajan, Christoph Keck, Darius Boehm, Frank Rominger, Sven M. Elbert, Michael Mastalerz   +8 more
wiley   +1 more source

Sensitivity study of energy transfer between mesoscale eddies and wind-induced near-inertial oscillations [PDF]

Ocean Science
Analyses of current observations and numerical simulations at two moorings in the northern South China Sea reveal the transfer of near-inertial energy between the background currents associated with mesoscale eddies and near-inertial currents (NICs).
Y. Zhang, J. Gu, S. Chen, J. Hu, J. Sheng, J. Xing   +5 more
doaj   +1 more source

Synthesis and Structure of an S‐Shaped Double Expanded Helicene With Seven Fused Anthracene Units

Chemistry – A European Journal, EarlyView.
The anthracene‐fused aromatic compound was synthesized by four‐fold cycloisomerization of the corresponding alkyne precursor. X‐ray crystallographic analysis revealed that this compound had a double helical structure of Ci symmetry, in which the terminal and central anthracene units were triply stacked.
Shinji Toyota, Kaito Hohno, Takehiro Kihara, Yu Watanabe, Yuki Shigihara, Eiji Tsurumaki, Masahiro Yamashina   +6 more
wiley   +1 more source

Quantitative Proteomics of the Root of Transgenic Wheat Expressing TaBWPR-1.2 Genes in Response to Waterlogging

Proteomes, 2014
Once candidate genes are available, the application of genetic transformation plays a major part to study their function in plants for adaptation to respective environmental stresses, including waterlogging (WL).
Emdadul Haque, Fumitaka Abe, Masahiko Mori, Yohei Nanjo, Setsuko Komatsu, Atsushi Oyanagi, Kentaro Kawaguchi   +6 more
doaj   +1 more source

Cyclization of a 1,8‐Diphenylanthracene by Scholl Reactions to Form Five‐ and Seven‐Membered Ring Embedded Polycyclic Aromatic Hydrocarbons

Chemistry – A European Journal, EarlyView.
Reactions of 10‐mesityl‐1,8‐diphenylanthracene with DDQ/TfOH produced three products via sequential formation of a five‐ or seven‐membered ring. Unexpectedly, the triply cyclized product with a rubicene substructure was formed through cyclization involving 1,2‐methyl shift.
Tatsuhiro Sasaki, Eiji Tsurumaki, Shinji Toyota   +2 more
wiley   +1 more source