Related Experiment Video
Updated: Aug 9, 2026

Multiscale Sampling of a Heterogeneous Water/Metal Catalyst Interface using Density Functional Theory and Force-Field Molecular Dynamics
Published on: April 12, 2019
The use of multidimensional Franck-Condon simulations to assess model chemistries: a case study on phenol
Igor Pugliesi1, Klaus Müller-Dethlefs
1Department of Chemistry, York Centre of Laser Spectroscopy, YCLS, The University of York, Heslington, York YO10 5DD, UK. igor.pugliesi@gmail.com
Abstract:
Multidimensional Franck-Condon simulations of the dispersed fluorescence spectra of phenol generated with geometries obtained from the highly correlated post-Hartree-Fock methods CASSCF, MRCI, and SACCI are presented. While the simulations based on CASSCF and MRCI optimized geometries are very similar to each other and fail to reproduce the experimentally measured intensities faithfully, the simulations obtained from SACCI optimized geometries are very close to the experimental spectra. The code developed for the multidimensional Franck-Condon simulations is described. It is shown that the integral storage problem common to the evaluation of multidimensional Franck-Condon integrals can be overcome by saving all quantities needed to disk. This strategy allows the code to run on computers with limited resources and is very well suited for application to molecules with a very large number of vibrational modes.
Related Concept Videos
Molecular Models
Benzene to Phenol via Cumene: Hock Process
Experimental Determination of Chemical Formula
Chemical Shift: Internal References and Solvent Effects
The internal reference compound generally used in NMR spectroscopy is tetramethylsilane (TMS). TMS is preferred because it is chemically inert, soluble in NMR solvents, and easily removable. Also, the highly shielded methyl protons in TMS yield an intense...
Acidity and Basicity of Alcohols and Phenols
Calculating Equilibrium Concentrations
A more...

