Intercalation of Layered Metal Iodides with Pyridine Evidenced by Raman Spectroscopy

• Authors: N. Preda , L. Mihut , M. Baibarac , I. Baltog
• Languages of publication: EN

Abstracts

EN

PbI_2, BiI_3, CdI_2 and AgI crystalline samples intercalated with pyridine have been studied by Raman spectroscopy. Comparing the Raman spectra of pristine metal iodides with those of intercalated samples we have shown the coexistence, in the host crystalline lattice, of two adsorbed forms: a physisorbed one, featured by weak forces of van der Waals type and a chemisorbed one, involving stronger forces related to an electrostatic interaction. The physisorbed form is consistent with the molecules inserted into the interlayer spaces while the chemisorbed form is represented by the molecules forming coordination complexes with the crystalline lattice cations. The crucial role in the formation of such complexes is played by the lone pair of nitrogen atom belonging to the molecules.

Keywords

EN

71.20.Tx; 78.30.-j; 78.55.-m

Discipline

• 71.20.Tx: Fullerenes and related materials; intercalation compounds
• 78.55.-m: Photoluminescence, properties and materials(for time resolved luminescence, see 78.47.jd)
• 78.30.-j: Infrared and Raman spectra(for vibrational states in crystals and disordered systems, see 63.20.-e and 63.50.-x, respectively; for Raman spectra of superconductors, see 74.25.nd)

• Publisher: Institute of Physics, Polish Academy of Sciences
• Journal: Acta Physica Polonica A
• Year: 2009
• Volume: 116
• Issue: 1
• Pages: 81-83

Dates

published

2009-07

Contributors

author

N. Preda

• National Institute of Materials Physics, Lab. of Optics and Spectroscopy, P.O. Box MG-7, R-77125, Bucharest, Romania

author

L. Mihut

• National Institute of Materials Physics, Lab. of Optics and Spectroscopy, P.O. Box MG-7, R-77125, Bucharest, Romania

author

M. Baibarac

• National Institute of Materials Physics, Lab. of Optics and Spectroscopy, P.O. Box MG-7, R-77125, Bucharest, Romania

author

I. Baltog

• National Institute of Materials Physics, Lab. of Optics and Spectroscopy, P.O. Box MG-7, R-77125, Bucharest, Romania

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Identifiers

DOI

10.12693/APhysPolA.116.81