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🔍 spatial analysis 📂 Chemistry 📄 Preprint
Showing 3031 results for "spatial analysis" in Chemistry · Preprint
Chemistry Preprint PDF DOI

Towards Accelerated SCF Workflows with Equivariant Density-Matrix Learning and Analytic Refinement

Zuriel Y. Yescas-Ramos, Andres Alvarez-Garcia, Huziel E. Sauceda · 2026

We present \textsc{dm-PhiSNet}, a physically constrained \textsc{PhiSNet}-based equivariant model that predicts one-electron reduced density matrices (1-RDMs) directly from molecular geometries in an …

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Chemistry Preprint PDF DOI

Experimentally Accurate Graph Neural Network Predictions of Core-Electron Binding Energies

Adam E. A. Fouda, Joshua Zhou, Rodrigo Ferreira, Patrick Phillips, Valay Agarawal, Bhavnesh Jangid, Jacob J. Wardzala, Rui Ding, Junhong Chen, Nicole Tebaldi, Phay J. Ho, Laura Gagliardi, Linda Young · 2026

Graph neural network architectures are advantageous for predicting core-electron binding energies which depend on local bond environment effects, as the number of message passing layers defines the to…

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Chemistry Preprint PDF DOI

Effect of reaction temperature on nascent carbonaceous particles from toluene shock-tube pyrolysis: Insights from FTIR and Raman spectroscopy

Meysam K. Rezaeian, Can Shao, Jurgen Herzler, Mustapha Fikri, Greg J. Smallwood, Christof Schulz · 2026

The transition from gaseous precursors to nascent solid particles and their subsequent structural maturation were investigated in single-pulse shock-tube experiments using ex situ Fourier-transform in…

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Chemistry Preprint PDF DOI

DFT-assisted natural abundance 13C zero-field NMR via optical magnetometry

Blake Andrews, Xiao Liu, Raphael Zumbrunn, Calvin Lee, Sahand Adibnia, Emanuel Druga, Martin Head-Gordon, Ashok Ajoy · 2026

Zero-field (ZF) nuclear magnetic resonance (NMR) spectroscopy probes scalar J-couplings between nuclei while dispensing with large homogeneous magnetic fields, enabling low-cost and geometrically flex…

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Chemistry Preprint PDF DOI

Excitation of Low-Frequency Modes and the Effects of Protein Dynamics on Spectral Densities of Bacteriochlorophyll Molecules

Sayan Maity, Tristan A. Mauck, Ulrich Kleinekathofer · 2026

In the theory of open quantum systems, spectral densities are key quantities for modeling the dynamics and spectroscopic properties of the system under investigation. In the case of light-harvesting c…

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Chemistry Preprint PDF DOI

Prominent Signatures of Energy Transfer in Action-Detected Spectra of a Cyanobacterial Photosynthetic Protein

Sayan Ghosh, Amitav Sahu, Stephanie Gonzalez-Migoni, Thomas L.C. Jansen, Vivek Tiwari · 2026

Action-detected two-dimensional electronic spectroscopy (A-2DES) could potentially be a versatile chemical tool with applicability across a range of photophysical observables such as photocurrent, pho…

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Chemistry Preprint PDF DOI

$^{13}$C and $^{19}$F Nucleus-Electron Correlation and Self-Energies

Janina Vohdin, Christof Holzer · 2026

We present a theoretical and numerical study of the correlation between electrons and the fermionic $^{13}$C and $^{19}$F nuclei. We use the random-phase approximation (RPA) as a valuable tool in obta…

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Chemistry Preprint PDF DOI

Vib2Conf: AI-driven discrimination of molecular conformations from vibrational spectra

Xin-Yu Lu, De-Yi Lin, Tong Zhu, Bin Ren, Hao Ma, Guo-Kun Liu · 2026

Retrieving or generating two-dimensional molecular structures on the basis of vibrational spectra has been well demonstrated via deep learning models. However, deciphering three-dimensional molecular …

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Chemistry Preprint PDF DOI

Electronic Final States in Nuclear $\beta$ Decay: A Sudden-Approximation Framework

G. V. D'yakonov · 2026

Electronic final states generated by sudden changes of the Hamiltonian are studied here, with emphasis on nuclear charge variation in $\beta$ decay. A $\lambda$-parametrized family $\hat H(\lambda)$ t…

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Chemistry Preprint PDF DOI

Broadband impulsive stimulated Raman spectroscopy reveals electronic state-specific vibronic coupling and vibrational coherence transfer through nonadiabatic electronic coupling

Ramandeep Kaur, Shaina Dhamija, Garima Bhutani, Amit Kumar, Arijit K. De · 2026

Vibrational wavepacket dynamics in the ground (X) and excited (B) electronic states of iodine under impulsive-pump/broadband-probe excitation are revisited. A method for accurate chirp correction, nec…

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Chemistry Preprint PDF DOI

Charge order, domain order, ideal mixing and absence of demixing in 2D binary mixtures of alcohols

Lydia Chelli, Aurelien Perera · 2026

Binary mixtures of two dimensional, site-based models of alcohols are investigated by computer simulations, with a focus on ideal mixing, local clustering and miscibility trends. Four representative s…

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Chemistry Preprint PDF DOI

Performance of Quadrupole Mass Filter with Tapered and Flared Geometry

Anushree Dutta, Pintu Mandal, Nabanita Deb · 2026

The performance of a quadrupole mass filter (QMF) is highly sensitive to deviations from ideal electrode geometry. In this work, we investigate the effect of small inward and outward tilting of cylind…

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Chemistry Preprint PDF DOI

Molecular dynamics simulations of Nafion thin films at a platinum catalyst surface: Correlating structure with charging behaviour

Dustin Vivod, Binny A. Davis, Tobias Binninger, Michael Eikerling · 2026

Electrocatalysis is greatly influenced by the local reaction environment, which is governed by the structure of the catalyst, the distribution of the electrolyte, and the local electric field. In cata…

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Chemistry Preprint PDF DOI

Birth, Death, and Replication at Surfaces: Universal Laws of Autocatalytic Dynamics

Denis S. Grebenkov · 2026

Autocatalytic processes underlie diverse systems in which replication is triggered at interfaces, including heterogeneous catalysis on solid substrates, enzyme activity at membranes, viral infections,…

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Chemistry Preprint PDF DOI

Chromatographic Peak Shape from a Stochastic-Diffusive Model with Multiple Retention Mechanisms: Analytic Time-Domain Expression and Derivatives

Hernan R. Sanchez · 2026

A time-domain analytic expression for chromatographic peak shapes is derived within a stochastic-diffusive framework that incorporates axial diffusion (molecular and multipath/Eddy), finite initial sp…

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Chemistry Preprint PDF DOI

Beyond the Virial Expansion: Microscopic Origins of Partial Molar Volumes in LiCl Solutions

Chun-Ting Lin, Diganta Dasgupta, Tinglu Yang, Cesare Malosso, Giulia Sormani, Colin Egan, Giovanni Bussi, Ali Hassanali, Paul S. Cremer · 2026

Although electrolyte density measurements have been reported for over a century, employing them to obtain accurate partial molar volume (PMV) profiles as a function of salt concentration has remained …

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Chemistry Preprint PDF DOI

Causality in Liquid Water as a Hallmark of Emergent Glassy Dynamics

Leon Huet, Vittorio Del Tatto, Debarshi Banerjee, Alessandro Laio, Ali A. Hassanali · 2026

In molecular liquids such as water, time-delayed influences between microscopic or mesoscopic variables are typically probed using time-correlation functions, which are symmetric under detailed balanc…

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Chemistry Preprint PDF DOI

A Chemical Space Perspective on Diastereomeric Barriers in Alkylperoxy-to-Hydroperoxyalkyl Isomerization

Raghunathan Ramakrishnan · 2026

Low-temperature hydrocarbon autooxidation involves radical intermediates whose reactivity depends not only on the stereochemistry of the intermediates themselves, but also on that of the transient spe…

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Chemistry Preprint PDF DOI

Spin-cavity interactions in relativistic Jahn-Teller systems under strong light-matter coupling

Eric W. Fischer, Michael Roemelt · 2026

We extend our recent work on the cavity-modified spin Zeeman effect of an effective spin-1/2-system[J. Chem. Phys. 163, 174307 (2025)] to a relativistic Jahn-Teller scenario under strong light-matter …

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Chemistry Preprint PDF DOI

Interfacial Electric Fields in Water Nanodroplets are Weakly Dependent on Curvature and pH

Gabriele Amante, Fortunata Panzera, Gabriele Centi, Jing Xie, Ali Hassanali, A. Marco Saitta, Giuseppe Cassone · 2026

The origin of enhanced reactivity in aqueous microdroplets remains debated, with interfacial electric fields (IEFs) often invoked as catalytic drivers. Here, we provide a quantum-mechanical, spatially…

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