Chemical Reactivity Descriptors in Density Functional Theory

Chemical reactivity descriptors derived from density functional theory offer a powerful framework for predicting and rationalising how molecules behave in chemical processes. At the heart of this approach lie global indicators—such as chemical potential, hardness and electrophilicity—that quantify a molecule’s overall tendency to donate or accept electrons, and local indicators—such as Fukui functions and Parr functions—that pinpoint the most reactive sites within a molecular framework. Together, these descriptors bridge fundamental electronic structure and observable chemical behaviour, enabling researchers to forecast selectivity in organic synthesis, assess corrosion inhibition, design functional materials and guide drug-discovery campaigns. Advances in computational algorithms and the continual refinement of exchange–correlation functionals have improved the accuracy of reactivity indices, while methodological innovations such as Koopmans-in-DFT and range-separated hybrids address longstanding challenges in electron affinity and ionisation potential estimates. Practical applications range from advising bench chemists on electrophilic aromatic substitution to screening natural products for bioactivity, highlighting the global significance of conceptual DFT in both academic and industrial settings. Enhanced by growing computational resources and integration with machine-learning techniques, chemical reactivity descriptors are poised to accelerate innovation in catalysis, materials science and pharmaceutical chemistry over the coming decade.

Research from Nature Portfolio

No recent Nature Portfolio content available.

Chemical Reactivity Descriptors in Density Functional Theory publication trend

The graph below shows the total number of articles in chemical reactivity descriptors in density functional theory across all publications each year (not limited to Nature Index journals).

Technical terms

Density Functional Theory (DFT): A quantum-mechanical method that models electronic structure using functionals of the electron density rather than many-electron wavefunctions.

Conceptual DFT (CDFT): A branch of DFT focused on deriving chemically intuitive descriptors—global and local—that predict reactivity trends and site selectivity.

Global reactivity descriptors: Quantitative measures—such as chemical potential, hardness and electrophilicity—that characterise a molecule’s overall tendency to gain or lose electron density.

Local reactivity descriptors: Spatially resolved indicators—such as Fukui functions and Parr functions—that identify the most reactive atoms or bonds within a molecule.

Fukui function: A local descriptor expressing the change in electron density upon addition or removal of an electron, used to predict nucleophilic and electrophilic sites.

References

1. Fast and accurate prediction of the regioselectivity of electrophilic aromatic substitution reactions. Chemical Science (2018).
2. Dataset for quantum-mechanical exploration of conformers and solvent effects in large drug-like molecules. Scientific Data (2024).
3. Conceptual DFT Study of the Local Chemical Reactivity of the Colored BISARG Melanoidin and Its Protonated Derivative. Frontiers in Chemistry (2018).