Results 21 to 30 of about 2,404 (97)
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
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
Tuning the pseudospin polarization of graphene by a pseudo-magnetic field [PDF]
, 2017 One of the intriguing characteristics of honeycomb lattices is the appearance of a pseudo-magnetic field as a result of mechanical deformation. In the case of graphene, the Landau quantization resulting from this pseudo-magnetic field has been measured ...
Alexander Georgi +20 more
core +4 more sources
, 2016 We investigate the role of Kekule and non-Kekule structures in the radical character of alternant polycyclic aromatic hydrocarbons (PAHs) using thermally-assisted-occupation density functional theory (TAO-DFT), an efficient electronic structure method ...
Chai, Jeng-Da, Yeh, Chia-Nan
core +1 more source
Observation of nonlinear disclination states
Light: Science & Applications, 2023 Introduction of controllable deformations into periodic materials that lead to disclinations in their structure opens novel routes for construction of higher-order topological insulators hosting topological states at disclinations.
Boquan Ren +12 more
doaj +1 more source
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
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
, 2015 The emergence of the Haldane Chern insulator state due to strong short range repulsive interactions in the half-filled fermionic spinless honeycomb lattice model has been proposed and challenged with different methods and yet it still remains ...
de Juan, Fernando +3 more
core +2 more sources
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
Emergence of Meron Kekulé lattices in twisted Néel antiferromagnets
npj Quantum MaterialsA Kekulé lattice is an exotic, distorted lattice structure exhibiting alternating bond lengths, distinguished from naturally formed atomic crystals.
Kyoung-Min Kim, Se Kwon Kim
doaj +1 more source