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Solid state vibrational circular dichroism towards molecular recognition: chiral metal complexes intercalated in a clay mineral

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Abstract

Vibrational circular dichroism (VCD) spectroscopy was applied to study chirality recognition in the interlayer space of a clay mineral. Clay intercalation compounds including two kinds of chiral molecules were prepared. Firstly a cationic metal complex, Δ- or Λ-[Ru(phen)3]2+ (phen = 1,10-phenanthroline), was ion-exchanged into sodium montmorillonite. Thereafter a neutral organic molecule, R- or S-1,1′-bi-2-naphthol (denoted as R- or S-BINOL), was co-adsorbed. The solid state VCD spectra were recorded on the hybrid compounds thus prepared. The intensity of VCD peaks in the region of 1300–1400 cm−1, which were assigned to the bending vibrations of OH groups in BINOL, was remarkably dependent on the chirality relation between the two intercalated species. This implied that BINOL took a different conformation in response to the chirality of co-existing [Ru(phen)3]2+.

Graphical abstract: Solid state vibrational circular dichroism towards molecular recognition: chiral metal complexes intercalated in a clay mineral

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Publication details

The article was received on 28 Jul 2017, accepted on 30 Aug 2017 and first published on 30 Aug 2017


Article type: Paper
DOI: 10.1039/C7CP05114J
Citation: Phys. Chem. Chem. Phys., 2017, Advance Article
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    Solid state vibrational circular dichroism towards molecular recognition: chiral metal complexes intercalated in a clay mineral

    H. Sato, K. Tamura, K. Takimoto and A. Yamagishi, Phys. Chem. Chem. Phys., 2017, Advance Article , DOI: 10.1039/C7CP05114J

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