Results 211 to 220 of about 708,136 (308)

Tuning Antiaromaticity Through Meso‐Substituent Orientation in Core‐Modified Isophlorins

Asian Journal of Organic Chemistry, Volume 14, Issue 8, August 2025.
The antiaromaticity of dithiadioxaisophlorins is controlled by the steric bulkiness of meso‐substituents through their tilt angle relative to the macrocycle. Bulkier substituents maintain larger angles, preserving stronger antiaromaticity, while smaller groups facilitate π‐conjugation with the macrocycle, diminishing antiaromaticity.
Maika Isoda, Haruna Sugimura, Yusuke Honda, Ken‐ichi Yamashita   +3 more
wiley   +1 more source

Three-Space as a Quantum Hyperlayer in 1+3 Dimensions: A Case Study in Quantum Space and Time. [PDF]

Entropy (Basel)
Czachor M.
europepmc   +1 more source

On the Ratio of the First Two Eigenvalues of Perturbed Harmonic Oscillators

, 1996
Kazuhiro Kurata
openalex   +1 more source

Tosylate as a Counter Ion in a Tetra‐Aza Macrocycle Complexed by Fe(II) and Co(II) Ions: Spectroscopic Characterization and Modelling by DFT Calculation

Applied Organometallic Chemistry, Volume 39, Issue 8, August 2025.
Tetra‐aza tosylate macrocycle complexed by Fe(II) and Co(II) ions: spectroscopic characterization and modelling by DFT calculation. ABSTRACT Herein, we detail the design of a novel tetra‐aza macrocyclic Schiff base ligand (A) and its corresponding iron (B, C) and cobalt (D, E) complexes, where chloride (B, D) and tosylate (C, E) counter ions were ...
Chaima Hassouna, Soumaya Agren, Maryem Ben Khalifa, Jamal El Haskouri, Rafik Ben Chaabane, Mohamed Hassen V. Baouab   +5 more
wiley   +1 more source

Thermal behavior of the Klein Gordon oscillator in a dynamical noncommutative space. [PDF]

Sci Rep
Haouam I.
europepmc   +1 more source

Orientation‐Dependent Upper Critical Magnetic Field and Density of State for Uranium Ditelluride

Advanced Physics Research, Volume 4, Issue 8, August 2025.
This study investigates the orientation‐dependent upper critical magnetic field (HC2) and the density of states (DOS) in the unconventional superconductor UTe2. These results reveal an anisotropic HC2, with distinct critical fields along different crystallographic axes, highlighting the role of electronic correlations and spin‐triplet pairing.
Habtamu Anagaw Muluneh
wiley   +1 more source

Correction: Absolute standard hydrogen electrode potential and redox potentials of atoms and molecules: machine learning aided first principles calculations. [PDF]

Chem Sci
Jinnouchi R, Karsai F, Kresse G.
europepmc   +1 more source

The Curious Concept That Almost Nobody Seemed to Care About at First: Virtual Particles in the Post‐War Period**

Berichte zur Wissenschaftsgeschichte, Volume 48, Issue 1-2, Page 143-162, August 2025.
Abstract Short‐lived, unobservable, and not subject to the usual rules of conservation of energy and momentum, virtual particles—an integral part of the conceptual framework of quantum field theory (QFT)—exhibit a number of curious characteristics which, in recent decades, have in part fueled important discussions about their ontological status ...
Jean‐Philippe Martinez
wiley   +1 more source

Nonlinear electronic oscillators as time sensors for high-precision positioning applications. [PDF]

Sci Rep
Metaxas K, Himona G, Famili A, Stavrou A, Kominis Y.   +4 more
europepmc   +1 more source

How Donor–Bridge–Acceptor Orientation and Chemical Modification Affect the Thermally Activated Delayed Fluorescence Abilities of Boron‐Based Emitters

ChemPhotoChem, Volume 9, Issue 8, August 2025.
Quantum chemistry has been used to investigate the key factors that determine the (reverse) intersystem crossing processes in boron‐based organic light‐emitting diode emitters. The ortho‐linked through‐space charge‐transfer compounds exhibit smaller singlet–triplet splittings than their para‐linked through‐bond charge‐transfer regioisomers.
Jeremy M. Kaminski, Tu V. Chu, Christel M. Marian   +2 more
wiley   +1 more source