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Chiral detection by induced surface-enhanced Raman optical activity

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    0543207 - ÚOCHB 2022 RIV GB eng J - Journal Article
    Das, Moumita - Gangopadhyay, Debraj - Šebestík, Jaroslav - Habartová, L. - Michal, P. - Kapitán, J. - Bouř, Petr
    Chiral detection by induced surface-enhanced Raman optical activity.
    Chemical Communications. Roč. 57, č. 52 (2021), s. 6388-6391. ISSN 1359-7345. E-ISSN 1364-548X
    R&D Projects: GA MŠk(CZ) EF16_019/0000729; GA ČR(CZ) GA20-10144S
    Institutional support: RVO:61388963
    Keywords : vibrational circular-dichroism * molecules * scattering
    OBOR OECD: Physical chemistry
    Impact factor: 6.222, year: 2020

    Combination of optical activity with surface-enhanced Raman scattering has been a dream of physical chemists for a long time. We report a measurement protocol based on silver colloids and aromatic linkers where chiral acids could be detected in concentrations of about 10−5 M. We explain the mechanism by binding and self-assembly of the linkers into chiral aggregates on the silver surface. Following the “sergeants-and-soldiers” principle, the chirality is determined by the relatively minor acidic component. Such detection of biologically relevant molecules may be useful when other methods, such as electronic circular dichroism, are not sensitive enough. In the future, variations of the chemical structure of the linker or other conditions are needed to provide a more specific signal allowing one to better discriminate among the optically active molecules.
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