14N quadrupole coupling in thermochromic and photochromic N-salicyclideneanilines
1980; Elsevier BV; Volume: 47; Issue: 1 Linguagem: Inglês
10.1016/0301-0104(80)80025-5
ISSN1873-4421
AutoresE. Hadjoudis, F. Milia, J. Seliger, R. Blinc, V. Žagar,
Tópico(s)Solid-state spectroscopy and crystallography
ResumoThe changes in the proton-nitrogen double resonance 14N NQR spectra on ultraviolet irradiation and on temperature show that photochromism and thermochromism in solid salicylidene-2-chloroaniline and N-5′-chlorosalicylideneaniline are accompanied by intramolecular proton transfer and an enol-keto transformation brought about by the transition of a proton from a lower energy tautomeric state (enol) to a higher energy minimum (the keto tautomeric state).
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