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'UV Vis Spectra' in keywords Facet   Publication Year 1996  [X]
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1996[X]
1Author    Claus Feldm, M. Artin, Jansen5Requires cookie*
 Title    O ptische A b sorp tion der A uride M3A11O ( Optical Absorption of the Aurides M3AuO (M = K, Rb, Cs)  
 Abstract    The optical absorption of the aurides M3AuO (M = K, Rb, Cs) and CsAu has been determ inated by UV/VIS spectroscopy. The band gaps have been found to be 2,35(2) eV (Cs3AuO) and 2,30(2) eV (CsAu). This corresponds to a more pronounced anionic character of gold in Cs3AuO as com pared to CsAu. In the case of K3AuO and R b3AuO no band gap was detectable. 
  Reference    Z. Naturforsch. 51b, 607—608 (1996); eingegangen am 24. Juli 1995 
  Published    1996 
  Keywords    Aurides, Optical A bsorption, UV-VIS Spectra 
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 TEI-XML for    default:Reihe_B/51/ZNB-1996-51b-0607_n.pdf 
 Identifier    ZNB-1996-51b-0607_n 
 Volume    51 
2Author    Hans Bock, Klaus Ziemer, Christian Näther, Holger Schödel, Markus Kleine, Mark SievertRequires cookie*
 Title    Donator/Akzeptor-Komplexe von Alkyl-und Aminobenzolen, Anthracen oder Pyren mit l,3,5-Cyan-/Nitro-benzolen: Kristallisation, Strukturen und Elektronenspektren Interactions in Crystals, 89 [ 1 -3] Donor/Acceptor Complexes of Alkyl and Aminobenzenes, Anthracene or Pyrene and 1,3,5-Cyano/nitro-benzenes: Crystallisation, Structures and Electronic Spectra  
 Abstract    The following mixed-stack donor/acceptor complexes {D • • • A}00 have been cry­ stallized and their structures determined: {hexam ethylbenzene--3,5-dicyano-l-nitroben­ zene hexamethylbenzene---3,5-dinitro-l-cyanobenzene}^, {pyrene- • -3,5-dinitro-l-cyano-ben zen e}^ , {anthracene---(3,5-dinitro-l-cyanobenzene)2}oo, {N,N-dimethylanilin---3,5-di-nitro-l-cyanobenzene}^ and { l^-phenylenediam ine-'-S^-dinitro-l-cyanobenzene}^. Their lattice packing consists of parallel layers, which contain either donors and acceptors as for hexamethylbenzene and pyrene or composite ones as in the 1:2 complex of anthracene with each one of the acceptors above and below its peripheral rings. The isostructural hexamethyl­ benzene complexes exhibit almost identical packing coefficients as well as a hexagonal coplanar arrangement of the C6(CH 3)6 donors. Weak intermolecular van der Waals interactions are also observed between antiparallel cyano substituents. The interplanar n distances range between 334 and 353 pm, /. e. around 340 pm of two van der Waals n radii. In none of the complexes, however, significant structural changes in either the donor or the acceptor components due to the complex formation are observed. In both the crystals as well as in solution, the donor/acceptor complexes exhibit colours between yellow and red; their long-wavelength charge transfer ab­ sorption maxima, therefore, correspond to a lowering in excitation energy of only up to 1 eV relative to that of the components. The different charge transfer in the ground and the CT excited states is also discussed referring to other data such as vertical first ionization energies or interplanar distances {D---A}, as well as to results from semiempirical calculations based on the crystal structure data determined and including approximate configuration interaction. Wechselwirkungen in Kristallen, 89 [1 -3] A u sgan gsp u n k te 
  Reference    Z. Naturforsch. 51b, 1538—1554 (1996); eingegangen am 27. Dezember 1995 
  Published    1996 
  Keywords    Donor/Acceptor-Complexes, Single Crystal Structures, UV/VIS Spectra 
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 TEI-XML for    default:Reihe_B/51/ZNB-1996-51b-1538.pdf 
 Identifier    ZNB-1996-51b-1538 
 Volume    51 
3Author    Hans Bock, Markus KleineRequires cookie*
 Title    Elektronentransfer und Ionenpaar-Bildung, 48 [1] Titrationen von Tetraphenyl-/?-benzochinon mit Natrium-und Kaliummetall in aprotischen Lösungen Electron Transfer and Ion Pair Formation, 48 [ 1 ] Titrations of Tetraphenyl-/?-benzoquinone with Sodium and Potassium Metals in Aprotic Solutions  
  Reference    Z. Naturforsch. 51b, 1222—1228 (1996); eingegangen am 25. Januar 1996 
  Published    1996 
  Keywords    benzoquinone Reduction, Alkaline and Alkaline Earth Metals, Aprotic Solution, UV/VIS Spectra 
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 TEI-XML for    default:Reihe_B/51/ZNB-1996-51b-1222.pdf 
 Identifier    ZNB-1996-51b-1222 
 Volume    51 
4Author    Z. NaturforschRequires cookie*
 Title    Elektronentransfer und Ionenpaar-Bildung  
 Abstract    , 47 [1] Titrationen von 1,2,4,5-Tetracyanbenzol und 7,7,8,8-Tetracyan-/;-chino-dimethan mit Natriummetall in aprotischen Lösungen E le ctro n T ran sfer an d Ion P air F o rm atio n , 47 [ 1 ] T itratio n s o f 1,2 ,4 ,5 -T etracy an o b en zen e and 7 ,7 ,8 ,8 -T etracy an o -/?-q u in o d im eth an e w ith S o d iu m M etal in A p ro tic S o lu tio n s H an s B ock*, M a rk u s K leine 
  Reference    Z. Naturforsch. 51b, 1215—1221 (1996); eingegangen am 25. Januar 1996 
  Published    1996 
  Keywords    1, 2, 4, 5-Tetracyanobenzene, 7, 7, 8, 8-Tetracyano-/?-quinodimethane, Sodium Metal Reduction, UV/VIS Spectra 
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 TEI-XML for    default:Reihe_B/51/ZNB-1996-51b-1215.pdf 
 Identifier    ZNB-1996-51b-1215 
 Volume    51