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2001 (1)
1989 (1)
1Author    M. Brozis3, J. R. Heldtb, J. Heldt3Requires cookie*
 Title    Experimental and Theoretical Determination of Electronic State Energies of Naphthanilides  
 Abstract    Experimental absorption spectra of a -and /3-naphthanilide derivatives in the vapour phase and in MCH solution are interpreted on basis o f calculations performed using the INDO/S-CI method. The ground state geometries have been optimised with the PM3 parameterisation method. The calculated values of the lowest triplet state T { as well as energy differences of the Tj —► Tn transitions have been compared with measured data determined from the phosphorescence and picosecond transient absorption spectra. For SQ —► Sn and T x — Tn transitions, a good agreement is noticed between the experimental and calculated energy values. An additional band observed in the total luminescence spectrum at 77 K, is interpreted as due to the emission of the double H-bonded imidol dimer formed in the excited state. -PACS: 31.70 Dk, 33.50 Dg 
  Reference    Z. Naturforsch. 56a, 841—848 (2001); received August 27 2001 
  Published    2001 
  Keywords    Naphthanilides, Absorption, INDO/S Calculations, Luminescence Spectrum 
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 TEI-XML for    default:Reihe_A/56/ZNA-2001-56a-0841.pdf 
 Identifier    ZNA-2001-56a-0841 
 Volume    56 
2Author    K. Kynev, V. KukRequires cookie*
 Abstract    It is shown that a ZnS:Eu phosphor with line emission spectrum can be prepared without coactivator introduction, contrary to previous results. The broad-band emission established in ZnS: Eu, Li is ascribed to the formation of Eu2 + centres due to the removal of lattice stress by lithium incorporation. 
  Reference    Z. Naturforsch. 44a, 81—83 (1989); received September 27 1988 
  Published    1989 
  Keywords    Zinc sulphide, luminescence spectrum, europium line emission, phosphor preparation 
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 TEI-XML for    default:Reihe_A/44/ZNA-1989-44a-0081.pdf 
 Identifier    ZNA-1989-44a-0081 
 Volume    44