Accurate harmonic/anharmonic vibrational frequencies for open-shell systems: performances of the B3LYP/N07D model for semirigid free radicals benchmarked by …

C Puzzarini, M Biczysko, V Barone - Journal of Chemical Theory …, 2010 - ACS Publications
Impressive growth of computer facilities and effective implementation of very accurate
quantum mechanical methods allow, nowadays, the determination of structures and …

Complete, Theoretical Rovibronic Spectral Characterization of the Carbon Monoxide, Water, and Formaldehyde Cations

MC Davis, X Huang, RC Fortenberry - Molecules, 2023 - mdpi.com
New high-level ab initio quartic force field (QFF) methods are explored which provide
spectroscopic data for the electronically excited states of the carbon monoxide, water, and …

Franck-Condon factors based on anharmonic vibrational wave functions of polyatomic molecules

V Rodriguez-Garcia, K Yagi, K Hirao, S Iwata… - The Journal of chemical …, 2006 - pubs.aip.org
Franck-Condon (FC) integrals of polyatomic molecules are computed on the basis of
vibrational self-consistent-field (VSCF) or configuration-interaction (VCI) calculations …

Valence photoionization and autoionization of the formyl radical

JD Savee, B Sztáray, O Welz, CA Taatjes… - The Journal of …, 2021 - ACS Publications
We have used 308 nm photolysis of acetaldehyde to measure a photoionization spectrum of
the formyl (HCO) radical between 8 and 11.5 eV using an 11 meV FWHM photoionization …

Collision-induced dissociation of formaldehyde cations: The effects of vibrational mode, collision energy, and impact parameter

J Liu, B Van Devener, SL Anderson - The Journal of chemical physics, 2002 - pubs.aip.org
We report a study of collision-induced dissociation (CID) of H 2 CO+, including
measurement of the effects of collision energy (E col) and five different H 2 CO+ vibrational …

Multiphoton ionization and photoelectron spectroscopy of formaldehyde via its 3p Rydberg states

J Liu, HT Kim, SL Anderson - The Journal of Chemical Physics, 2001 - pubs.aip.org
Photoelectron spectroscopy is used to probe the nature of the vibronic levels associated with
the 1A2 (3px) intermediate state, to measure vibrational frequencies of the resulting cations …

[HTML][HTML] Infrared spectroscopy and theory of the formaldehyde cation and its hydroxymethylene isomer

DT Mauney, JD Mosley, LR Madison… - The Journal of …, 2016 - pubs.aip.org
Pulsed discharges in supersonic expansions containing the vapor of different precursors
(formaldehyde, methanol) produce the m/z= 30 cations with formula [H 2, C, O]+. The …

PW86–PW91 density functional calculation of vertical ionization potentials: Some implications for present‐day functionals

WA Shapley, DP Chong - International Journal of Quantum …, 2001 - Wiley Online Library
A total of 181 vertical ionization potentials (VIPs) of 41 molecules were calculated by density
functional theory (DFT) employing the Perdew–Wang 1986 (PW86) exchange and Perdew …

The formaldehyde cation: Rovibrational energy level structure and Coriolis interaction near the adiabatic ionization threshold

AM Schulenburg, M Meisinger, PP Radi… - Journal of Molecular …, 2008 - Elsevier
Rotationally resolved pulsed-field-ionization zero-kinetic-energy photoelectron spectra of
the 00, 61 and 41 vibrational levels of the X∼+ 2B2 ground electronic state of the …

The electronic structure of the H2CO+ radical and higher Rydberg states of H2CO

J PABLO, BMRJHF GREIN - Molecular Physics, 1998 - Taylor & Francis
Several properties of H2CO+ (eg, equilibrium geometries, harmonic vibrational frequencies
and infrared intensities, ionization potentials, electronic transition energies, and R (CO) …