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Density Functional Theory (DFT): From Conceptual Developments to Practical Applications

A special issue of Molecules (ISSN 1420-3049). This special issue belongs to the section "Computational and Theoretical Chemistry".

Deadline for manuscript submissions: 31 October 2026 | Viewed by 856

Special Issue Editors


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Guest Editor
Coatings and Polymeric Materials, North Dakota State University, Fargo, ND 58108, USA
Interests: DFT; TDDFT; computational chemistry; machine learning; cheminformatics

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Guest Editor Assistant
Centro de Nanotecnología Aplicada, Facultad de Ciencias, Ingeniería y Tecnología, Universidad Mayor, Camino La Pirámide 5750, Huechuraba 8580745, Santiago, Chile
Interests: DFT; post-HF methods to the study of molecules and materials; chemical sensors; catalysis; photocatalysis

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Guest Editor Assistant
Departamento de Física y Química, Facultad de Ingeniería, Instituto de Ciencias Químicas Aplicadas, IDETECO, Universidad Autónoma de Chile, Av. Alemania 01090, Temuco 4810101, Chile
Interests: theoretical and computational chemistry; molecular properties; photophysical properties; reaction mechanisms; sensors; photocatalysts; biomarkers

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Guest Editor Assistant
Departamento de Ciencias Biológicas y Químicas, Facultad de Recursos Naturales, Universidad Católica de Temuco, Temuco 4780000, Chile
Interests: DFT, TDDFT for molecular descriptors; molecular docking; QSAR; molecular dynamics simulations; free energy calculations

Special Issue Information

Dear Colleagues,

In recent decades, our understanding of quantum chemical methods and computational simulation skills has provided a robust tool for detailed descriptions and interpretations of the relationship between structure and properties in various chemical systems, ranging from molecules to materials. The state of the art of computational methods and theoretical chemistry offers powerful opportunities to investigate the underlying governing chemical phenomena in chemical systems for diverse applications, using robust tools based on Density Functional Theory (DFT) methods. This scenario has provided an expanding landscape of computational simulations, bridging theory with bench experimentation. Even though DFT has well-recognized limitations, the scientific community involved in the quantum chemistry field is making impressive strides in resolving these issues and creating new avenues for contributions that push the limits of computational chemistry. On the other hand, multidisciplinary research increasingly involves computational simulations based on DFT methods, where research is conducted through a combination of theoretical and experimental approaches. The continuous advancement of computational methods and codes, alongside the development of computer power, enables more accurate simulations and analyzing intricate systems, encompassing both molecular and material structures distinguished by significant atom quantities. This Special Issue will accept computational and/or integrated experimental-theoretical frameworks using DFT approaches.

Dr. Gerardo M. Casañola-Martin
Guest Editors

Dr. Yoan Hidalgo-Rosa
Dr. Manuel Treto-Suárez
Dr. Karel Mena-Ulecia
Guest Editor Assistants

Manuscript Submission Information

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Please visit the Instructions for Authors page before submitting a manuscript. The Article Processing Charge (APC) for publication in this open access journal is 2700 CHF (Swiss Francs). Submitted papers should be well formatted and use good English. Authors may use MDPI's English editing service prior to publication or during author revisions.

Keywords

  • density functional theory (DFT) methods
  • Ab initio molecular dynamics
  • elucidation of detection mechanisms
  • electronic structure and binding energies
  • catalysis and photocatalysis
  • optical properties and excited-state dynamics
  • DFT benchmarking and perspectives
  • molecular descriptors based on density functional theory.

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Published Papers (1 paper)

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Research

15 pages, 4490 KB  
Article
New Insights into the Thermodynamic Properties and Raman Vibrational Modes of Polyhalite from Density Functional Theory
by Huaide Cheng, Yugang Chen and Shichun Zhang
Molecules 2026, 31(8), 1269; https://doi.org/10.3390/molecules31081269 - 12 Apr 2026
Viewed by 241
Abstract
Polyhalite, K2SO4•MgSO4•2CaSO4•2H2O, a ternary evaporite mineral, is commonly found in evaporitic rock salt strata, where it acts as an indicator mineral for potash evaporite deposits. As a directly exploitable mineral potash fertilizer, polyhalite [...] Read more.
Polyhalite, K2SO4•MgSO4•2CaSO4•2H2O, a ternary evaporite mineral, is commonly found in evaporitic rock salt strata, where it acts as an indicator mineral for potash evaporite deposits. As a directly exploitable mineral potash fertilizer, polyhalite serves as an important substitute for potassium resources. The thermodynamic properties of polyhalite remain poorly characterized experimentally; consequently, current estimates predominantly rely on predictive modeling and indirect experimental approaches. The Raman spectra of free SO42− vibrational modes in various sulfate minerals are sensitive to the local symmetry and hydrogen-bonding environment within crystal hydrates, and are directly influenced by the surrounding crystal field. This sensitivity makes Raman spectroscopy a powerful tool for investigating and identifying the crystal structures of sulfate minerals. In this work, the thermodynamic and Raman vibrational properties of polyhalite were investigated using density functional theory (DFT). Phonon calculations at the optimized geometry were employed to compute polyhalite’s key thermodynamic properties—specific heat, entropy, enthalpy, Gibbs free energy, and Debye temperature—over a temperature range of 0–1000 K. The results showed that: (1) the computed volume exhibited minimal error, approximately 0.87%, compared to experimental data; (2) the calculated values for the isobaric heat capacity and entropy were 420.72 and 531.39 J·mol−1·K−1 at 298.15 K, respectively; and (3) the calculated value for the free energy of formation at 298.15 K was −5670 kJ·mol−1. The computed Raman spectrum results showed that the typical spectral features of polyhalite are: (1) ν1 for 1024 cm−1, symmetric stretching mode; (2) ν2 for 464 cm−1, symmetry bending mode; and (3) ν4 for 627 cm−1, anti-symmetry bending mode. Full article
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