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Applied Spectroscopy

Applied Spectroscopy

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  • Vol. 48, Iss. 2 — Feb. 1, 1994
  • pp: 224–227

Raman Spectroscopic Investigation of the Physical State of para-Nitroaniline in Channels of the AIPO4-5 Molecular Sieve

W. Hill, F. Marlow, and J. Kornatowski

Applied Spectroscopy, Vol. 48, Issue 2, pp. 224-227 (1994)


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Abstract

The physical state of para-nitroaniline (p-NA) adsorbed in the channels of AIPO4-5 molecular sieves has been investigated by means of Raman spectroscopy. The Raman spectra show that the p-NA molecules within the channels form either a phase of head-to-tail chains similar to that in the solid crystaline p-NA with a characteristic ω3 band at 1282 cm-1 or a second phase, which is characterized by the similarly strong band around 1295 cm-1. This second phase consists of weakly interacting p-NA molecules in a similar pseudo-quinonoidic state as molten p-NA. Despite the missing formation of solid-like chains, molecules in the second phase are also highly orientated. However, their mean nutation angle with respect to the crystal axis z is about 16°, and, thus, it is larger than that of the chains.

Citation
W. Hill, F. Marlow, and J. Kornatowski, "Raman Spectroscopic Investigation of the Physical State of para-Nitroaniline in Channels of the AIPO4-5 Molecular Sieve," Appl. Spectrosc. 48, 224-227 (1994)
http://www.opticsinfobase.org/as/abstract.cfm?URI=as-48-2-224

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