Anion Photoelectron Spectroscopy and Quantum Chemical Calculations
Summary
Anion photoelectron spectroscopy (PES) is a powerful experimental method for probing the electronic and vibrational structure of negatively charged species by measuring the kinetic energy of electrons detached upon photon impact. When combined with high-level quantum chemical calculations, such as coupled-cluster and multireference configuration interaction techniques, PES yields precise electron affinities, detailed potential-energy surfaces and insights into bonding motifs, excited-state dynamics and transient reaction intermediates. This synergistic approach has transformed our understanding of gas-phase clusters, reactive diradicals, solvation effects and noncovalent interactions. It informs diverse fields, from astrochemical models of interstellar anions to the design of novel materials for catalysis and energy storage, by providing benchmark data against which theoretical methods are calibrated and refined.
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Anion Photoelectron Spectroscopy and Quantum Chemical Calculations publication trend
The graph below shows the total number of articles in anion photoelectron spectroscopy and quantum chemical calculations across all publications each year (not limited to Nature Index journals).
Technical terms
Anion photoelectron spectroscopy: Experimental technique using photon detachment to measure electron binding energies and reveal electronic and vibrational structure of anions.
Ab initio methods: Quantum mechanical calculations based on first principles without empirical parameters, such as coupled-cluster and configuration interaction approaches.
Electron affinity: Energy change when a neutral species gains an electron, determined from the lowest-energy onset in a photoelectron spectrum.
Franck–Condon factors: Probability weights that govern intensities of vibrational transitions in electronic spectra, used to simulate spectral profiles.
References
- Theoretical Study of an Authentic Hydrocarbon Ion Pair. ACS Omega (2024).
- Noncovalent chalcogen and tetrel bonding interactions: Spectroscopic study of halide–carbonyl sulfide complexes. Natural Sciences (2023).
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