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Title: An Ab Initio Correction Vector Restricted Active Space Approach to the L-Edge XAS and 2p3d RIXS Spectra of Transition Metal Complexes

Journal Article · · Journal of Chemical Theory and Computation
ORCiD logo [1]; ORCiD logo [2];  [2]
  1. Department of Chemistry, Seoul National University, Seoul 151-747, South Korea, Division of Chemistry and Chemical Engineering, California Institute of Technology, Pasadena, California 91125, United States
  2. Division of Chemistry and Chemical Engineering, California Institute of Technology, Pasadena, California 91125, United States

We describe an ab initio approach to simulate Ledge X-ray absorption (XAS) and 2p3d resonant inelastic X-ray scattering (RIXS) spectroscopies. We model the strongly correlated electronic structure within a restricted active space and employ a correction vector formulation instead of sum-overstate expressions for the spectra, thus eliminating the need to calculate a large number of intermediate and final electronic states. We present benchmark simulations of the XAS and RIXS spectra of the iron complexes [FeCl4]1–/2– and [Fe(SCH3)4]1–/2– and interpret the spectra by deconvolving the correction vectors. Our approach represents a step toward simulating the X-ray spectroscopies of larger metal cluster systems that play a pivotal role in biology.

Research Organization:
California Institute of Technology (CalTech), Pasadena, CA (United States)
Sponsoring Organization:
USDOE Office of Science (SC), Basic Energy Sciences (BES)
Grant/Contract Number:
SC0023318; SC0019374
OSTI ID:
2203001
Alternate ID(s):
OSTI ID: 2208750
Journal Information:
Journal of Chemical Theory and Computation, Journal Name: Journal of Chemical Theory and Computation Vol. 19 Journal Issue: 21; ISSN 1549-9618
Publisher:
American Chemical SocietyCopyright Statement
Country of Publication:
United States
Language:
English

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