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'Nitrogen 14 NQR' in keywords
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2000 (2)
1Author    T. A. Babushkina, K. G. Konopleva, A. L. Tupoleva, N. U. Venskovskii, L. Guibé, M. Gourdji Tb, A. PéneauRequires cookie*
 Title    NQR Investigation of Intercalates and Complexes of Cadmium and Lead Iodides with Pyridine, Aniline, and Piperidine  
 Abstract    I27 I and 14 N NQR have been investigated in two cadmium idodide -pyridine compounds, the inter-calate CdI 2 +5.9 pyridine and the CdI 2 Py 2 complex. In the intercalate, iodine is mainly ionic and nitro-gen like in pure pyridine; in the complex, iodine exhibits 30% covalency while nitrogen, coordinated to the central cadmium atom of the complex, and presents coupling constants e 2 Qq and r\ smaller than in pure pyridine. The difference between the two compounds is also revealed by the thermal coefficient of the quadrupole coupling constants and the relaxation. Results on the other title compounds are also given. 
  Reference    Z. Naturforsch. 55a, 139—144 (2000); received August 25 1999 
  Published    2000 
  Keywords    Cadmium Iodide, Layered Structure, Intercalation, Pyridine, Nitrogen-14 NQR 
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 TEI-XML for    default:Reihe_A/55/ZNA-2000-55a-0139.pdf 
 Identifier    ZNA-2000-55a-0139 
 Volume    55 
2Author    L. Guibé, A. Péneau, M. Gourdji, A. PanichRequires cookie*
 Title    Thiourea and Thiourea Inclusion Compounds. A 14 N NQR Investigation  
 Abstract    A reinvestigation of the nitrogen-14 NQR in thiourea has permitted to record, apparently for the first time, the resonances above 169 K. The first order and second order of the transitions at 169 K and 202 K, respectively, appear clearly from the temperature dependence of the resonance frequencies; the mod-ulated structure, incommensurate or commensurate, is also seen on the 14 N NQR spectrum. This study is the first step of a new investigation of thiourea and its inclusion compounds. 
  Reference    Z. Naturforsch. 55a, 331—334 (2000); received October 13 1999 
  Published    2000 
  Keywords    Thiourea, Nitrogen-14 NQR, Phase Transitions, Commensurate, Incommensurate Modu-lations, Inclusion Compounds 
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 TEI-XML for    default:Reihe_A/55/ZNA-2000-55a-0331.pdf 
 Identifier    ZNA-2000-55a-0331 
 Volume    55