Molecular Properties of 3d and 4fCoordination Compounds Deciphered by Raman Optical Activity Spectroscopy

0575450 - ÚOCHB 2024 RIV US eng J - Journal Article
Wu, Tao - Pelc, Radek - Bouř, Petr
Molecular Properties of 3d and 4fCoordination Compounds Deciphered by Raman Optical Activity Spectroscopy.
ChemPlusChem. Roč. 88, č. 9 (2023), č. článku e302300385. ISSN 2192-6506. E-ISSN 2192-6506
R&D Projects: GA ČR(CZ) GA23-05378S; GA ČR(CZ) GA22-04669S
Institutional support: RVO:61388963
Keywords : circular dichroism * circularly polarized luminescence * coordination compounds * molecular chirality * Raman optical activity
OECD category: Physical chemistry
Impact factor: 3.4, year: 2022
Method of publishing: Open access
https://doi.org/10.1002/cplu.202300385

Molecular properties of coordination compounds can be efficiently studied by vibrational spectroscopy. The scope of Raman spectroscopy has been greatly enhanced by the introduction of Raman optical activity (ROA) sensitive to chirality. The present review describes some of its recent applications to study the coordination compounds. 3d and 4f metal complexes often absorb the excitation light, or exhibit luminescence. Therefore, effects caused in ROA spectra by electronic circular dichroism (ECD) and circularly polarized luminescence (CPL) must be taken into consideration. 3d metal complexes often absorb the excitation laser radiation, and ECD and circularly-polarized Raman scattering compete with the resonance ROA (RROA) signal. Pure RROA spectrum can thus be obtained by subtracting the so-called ECD-Raman component. CPL is frequently encountered in 4f systems. While it can mask the ROA spectra, it is useful to study molecular structure. These electronic effects can be reduced by using near-infrared excitation although vibrational ROA signal is much weaker compared to the usual green laser excitation scenario. The ROA methodology is thus complex, but capable of providing unique information about the molecules of interests and their interaction with light.
Permanent Link: https://hdl.handle.net/11104/0345236