What question did this study set out to answer?

To explore the vibronic spectrum of C2O2+ and understand its electronic states through high-resolution spectroscopy and theoretical calculations.

High-Resolution Spectroscopy and Theoretical Study of C ₂ O ₂ ⁺ : Unveiling the 1 ² A g –X ² B u Electronic Transition

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To explore the vibronic spectrum of C2O2+ and understand its electronic states through high-resolution spectroscopy and theoretical calculations.
Recorded the vibronic spectrum of C2O2+ using photodissociation spectroscopy in a cryogenic ion trap.
Performed linearized pair-density functional theory (L-PDFT) calculations on six lowest-lying electronic states.
Analyzed Franck–Condon factors and rotational features to assign vibronic bands and determine transition energy.
Identified the dipole-allowed 12Ag–X̃2Bu electronic transition in the spectrum.
Revealed significant Fermi resonance between ν3 and 2ν6 vibronic levels.
Analyzed bond order and spin density to enhance understanding of electronic structure.

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Randomized trial investigates the electronic transition in C2O2+, indicating new insights into molecular behavior.

Li et al. (2026) studied this question.

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