Combination of Resonance and Non-Resonance Chiral Raman Scattering in a Cobalt(III) Complex.

Autor: Yang Q; Institute of Organic Chemistry and Biochemistry Academy of Sciences, Flemingovo náměstí 2, 16610, Prague, Czech Republic., Bloino J; Scuola Normale Superiore di Pisa, Piazza dei Cavalieri 7, 56126, Pisa, Italy., Šestáková H; Institute of Organic Chemistry and Biochemistry Academy of Sciences, Flemingovo náměstí 2, 16610, Prague, Czech Republic.; University of Chemistry and Technology, Technická 5, 16628, Prague 6, Czech Republic., Šebestík J; Institute of Organic Chemistry and Biochemistry Academy of Sciences, Flemingovo náměstí 2, 16610, Prague, Czech Republic., Kessler J; Institute of Organic Chemistry and Biochemistry Academy of Sciences, Flemingovo náměstí 2, 16610, Prague, Czech Republic., Hudecová J; Department of Optics, Palacký University Olomouc, 17. listopadu 12, 77146, Olomouc, Czech Republic., Kapitán J; Department of Optics, Palacký University Olomouc, 17. listopadu 12, 77146, Olomouc, Czech Republic., Bouř P; Institute of Organic Chemistry and Biochemistry Academy of Sciences, Flemingovo náměstí 2, 16610, Prague, Czech Republic.; University of Chemistry and Technology, Technická 5, 16628, Prague 6, Czech Republic.
Jazyk: angličtina
Zdroj: Angewandte Chemie (International ed. in English) [Angew Chem Int Ed Engl] 2023 Nov 06; Vol. 62 (45), pp. e202312521. Date of Electronic Publication: 2023 Oct 02.
DOI: 10.1002/anie.202312521
Abstrakt: Resonance Raman optical activity (RROA) spectra with high sensitivity reveal details on molecular structure, chirality, and excited electronic properties. Despite the difficulty of the measurements, the recorded data for the Co(III) complex with S,S-N,N-ethylenediaminedisuccinic acid are of exceptional quality and, coupled with the theory, spectacularly document the molecular behavior in resonance. This includes a huge enhancement of the chiral scattering, contribution of the antisymmetric polarizabilities to the signal, and the Herzberg-Teller effect significantly shaping the spectra. The chiral component is by about one order of magnitude bigger than for an analogous aluminum complex. The band assignment and intensity profile were confirmed by simulations based on density functional and vibronic theories. The resonance was attributed to the S 0 →S 3 transition, with the strongest signal enhancement of Raman and ROA spectral bands below about 800 cm -1 . For higher wavenumbers, other excited electronic states contribute to the scattering in a less resonant way. RROA spectroscopy thus appears as a unique tool to study the structure and electronic states of absorbing molecules in analytical chemistry, biology, and material science.
(© 2023 The Authors. Angewandte Chemie International Edition published by Wiley-VCH GmbH.)
Databáze: MEDLINE
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