Results 21 to 30 of about 3,035 (135)
On the number of Kekulé structures of fluoranthene congeners [PDF]
Journal of the Serbian Chemical Society, 2010 The Kekulé structure count K of fluoranthene congeners is studied. It is shown that for such polycyclic conjugated π-electron systems, either K = 0 or K ≥ 3.
DAMIR VUKIČEVIĆ +2 more
doaj
BNB/NBN‐Phenalenyl‐2'‐deoxyuridines as a Fluorophore–Quencher Pair in DNA
Angewandte Chemie, EarlyView.Two BN‐chromophore‐extended nucleosides containing electronically complementary BNB‐ and NBN‐doped phenalenyls were synthesised and incorporated into deoxyribonucleic acid (DNA) oligonucleotides. These chromophores act as an efficient fluorophore–quencher pair under aqueous conditions.
Sarah Lutz +6 more
wiley +2 more sources
Radical‐Based On‐Surface Transformation of Nonplanar Aromatics Into Nonbenzenoid Nanographenes
Angewandte Chemie, EarlyView.Formation of radicals in nonplanar hydrocarbons through thermally induced dehydrogenation leads to molecular transformation via intramolecular radical‐based cyclization and dimerization, leading to formation of nonbenzenoid nanographenes. ABSTRACT On‐surface synthesis has emerged as a powerful tool for atomically precise C─C bond formation, enabling ...
Daniel Rothhardt +8 more
wiley +2 more sources
Angewandte Chemie, EarlyView.We disclose a novel boron macrocycle derived from the sustainable furan building block. The boraporphyrinoid exhibits a global antiaromatic ring current and dynamic conformational flexibility. Twofold reduction induces a switch to strong global aromaticity, accompanied by stiffening of the porphyrinoid backbone.
Lukas Swoboda +6 more
wiley +2 more sources
Multifunctional sequence-defined macromolecules for chemical data storage [PDF]
, 2018 Sequence-defined macromolecules consist of a defined chain length (single mass), end-groups, composition and topology and prove promising in application fields such as anti-counterfeiting, biological mimicking and data storage. Here we show the potential
Dawyndt, Peter +5 more
core +2 more sources
m-Quinodimethane-Based Fused-Ring Diradicals with Singlet and Triplet Ground States
ChemistryDiradicals have attracted the attention of chemists due to their unique electronic structures and properties originating from unpaired electrons. One of the fundamental motifs of diradicals is quinodimethane; p- and o-quinodimethanes are singlet Kekulé ...
Akihiro Shimizu
doaj +1 more source
Algebraic structure count of linear phenylenes and their congeners [PDF]
Journal of the Serbian Chemical Society, 2003 The algebraic structure count of the linear phenylene with h six-membered rings is known to be equal to h + 1. We show that the same expression applies if each four-membered ring in the phenylene is replaced by a linear array consisting of k four ...
IVAN GUTMAN
doaj
Proximity Enhanced Quantum Spin Hall State in Graphene
, 2015 Graphene is the first model system of two-dimensional topological insulator (TI), also known as quantum spin Hall (QSH) insulator. The QSH effect in graphene, however, has eluded direct experimental detection because of its extremely small energy gap due
Chen, Changfeng +6 more
core +1 more source
Automated extraction of chemical structure information from digital raster images
Chemistry Central Journal, 2009 Background To search for chemical structures in research articles, diagrams or text representing molecules need to be translated to a standard chemical file format compatible with cheminformatic search engines.
Shedden Kerby A +5 more
doaj +1 more source
Phases and phase transitions of a perturbed Kekul\'e-Kitaev model
, 2015 We study the quantum spin liquid phase in a variant of the Kitaev model where the bonds of the honeycomb lattice are distributed in a Kekul\'e pattern. The system supports gapped and gapless Z_2 quantum spin liquids with interesting differences from the ...
Bhattacharjee, Subhro +2 more
core +1 more source