This collection explores the fascinating intersection where the laws of physics meet the complex machinery of chemistry. Here, researchers investigate how quantum mechanics governs molecular bonds, how light interacts with matter at the atomic scale, and how fundamental forces shape chemical reactions. It is a realm where abstract mathematical models collide with tangible substances to reveal the hidden mechanisms driving our material world.

On Gist.Science, we process every new preprint in this category directly from arXiv to make these discoveries accessible to everyone. Whether you are a seasoned expert or a curious reader, you will find both plain-language explanations and detailed technical summaries for each paper. Below are the latest contributions from the community pushing the boundaries of physical chemistry.

Viscosity as a Smoking Gun for Complex Formation in Solution: Fe2+^{2+} and Mg2+^{2+} Chlorides as Examples

This paper demonstrates that viscosity serves as a reliable indicator for determining the extent of complex formation in concentrated electrolyte solutions, using comparative simulations and experiments on FeCl2_2 and MgCl2_2 to show that higher viscosity correlates with greater speciation, a finding validated by recent X-ray and neutron scattering data.

Amrita Goswami, Samuel Blazquez, Lucía Fernández-Sedano, Eva González Noya, Hannes Jónsson, Jacobo Troncoso, Carlos Vega2026-03-06🔬 physics

Inverse-design of two-dimensional magnonic crystals via topology optimization with frequency-domain micromagnetics

This study presents an inverse-design framework combining genetic algorithms with frequency-domain micromagnetics to successfully discover unconventional two-dimensional magnonic crystal structures featuring large band gaps, thereby addressing the challenges of optimizing complex lattice geometries for targeted spin-wave properties.

Ryunosuke Nagaoka, Takahiro Yamazaki, Chiharu Mitsumata, Yuma Iwasaki, Masato Kotsugi2026-03-06🔬 cond-mat.mtrl-sci

Escaping the Hydrolysis Trap: An Agentic Workflow for Inverse Design of Durable Photocatalytic Covalent Organic Frameworks

This paper introduces "Ara," an LLM-based agentic workflow that leverages chemical priors to efficiently navigate the design space of covalent organic frameworks, successfully identifying durable and active photocatalysts for solar hydrogen production with significantly higher hit rates and faster convergence than random search or Bayesian optimization.

Iman Peivaste, Nicolas D. Boscher, Ahmed Makradi, Salim Belouettar2026-03-06🔬 cond-mat.mtrl-sci

The Angular Localization Function (ALF): a practical tool to measure solvent angular order with Molecular Density Functional Theory

This paper introduces the Angular Localization Function (ALF), a practical tool derived from Molecular Density Functional Theory that quantifies local solvent angular order and entropy, thereby providing a complementary and visualizable measure of orientational distribution for diverse solutes and surfaces in water.

Maïwenn Souetre, Benjamin Rotenberg, Guillaume Jeanmairet2026-03-06🔬 physics

MQED-QD: An Open-Source Package for Quantum Dynamics Simulation in Complex Dielectric Environments

This paper introduces MQED-QD, an open-source package that integrates macroscopic quantum electrodynamics with classical electromagnetic solvers to simulate exciton dynamics in complex dielectric and plasmonic environments, demonstrating how silver nanorods enhance long-range interactions and exciton delocalization compared to planar geometries.

Guangming Liu, Siwei Wang, Hsing-Ta Chen2026-03-06⚛️ quant-ph

Extending spin-lattice relaxation theory to three-phonon processes

This paper extends first-principles spin-lattice relaxation theory to include three-phonon processes, demonstrating that while these contributions are negligible for the studied Chromium nitride complex under experimental conditions—thereby validating the weak coupling assumption—the framework reveals that slightly stronger coupling could make three-phonon effects significant at room temperature.

Nilanjana Chanda, Alessandro Lunghi2026-03-06⚛️ quant-ph

Quantum Dynamical and isotopic effects for Hydrogen isotopes scattering at W(110) surface

This study investigates the scattering of hydrogen isotopes on a W(110) surface by comparing classical and quantum dynamics, revealing that quantum effects significantly enhance backscattering and produce resonance structures in absorption probabilities, particularly at low energies and for lighter isotopes.

Raúl Bombín, Oihana Galparsoro, Daniel Peláez, Jean Christophe Tremblay, Cédric Crespos, Pascal Larregaray2026-03-06🔬 physics

Collective Energy Transfer to a Spectator Atom via Multi-Center Intermolecular Coulombic Decay

This study demonstrates that intermolecular Coulombic decay (ICD) enables a novel collective energy transfer mechanism where multiple photoexcited pyridine molecules funnel energy to ionize a non-absorbing argon spectator atom, offering new insights for light harvesting and biomolecular photoprotection.

Saroj Barik, Pratikkumar Thakkar, Siddhartha S. Payra, Yash Lenka, Y. Sajeev, G. Aravind2026-03-05🔬 physics