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2000 (1)
1Author    J. Heldt, J. R. Heldt, T. Redzimski, H. Diehl, P. SchultzRequires cookie*
 Title    Spectroscopic Studies of Dimethylamino Derivatives of Fluorene  
 Abstract    2-dimethylamino-9-fluorenol and 2-dimethylamino-9(4'dimethylamino)phenyl-9-fiuorenol in polar solvents in the excited state undergo conformation changes in which two fluorescent isomers are created. The isomers (in the local excited (LE) and charge transfer (CT) configuration) pos-sess separate fluorescence bands, one appearing from the S! (LE) state and the second from the intramolecular charge transfer state S, (CT) of the neutral, aromatic molecule. Both bands show a solvatochromic effect. Using the method of the solvent induced Stokes shift of the absorption and fluorescence spectra the permanent dipole moment of the excited state of fluorene and its two derivatives have been determined. The dipole moment of the ground state and the Onsager cavity radius of the studied molecules were calculated with the Auestion Model 1 (AMI) program. 
  Reference    Z. Naturforsch. 55a, 902—908 (2000); received October 31 2000 
  Published    2000 
  Keywords    Isomer, Dual Fluoescence, Solvatochromic Effect, Charge Transfer 
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 TEI-XML for    default:Reihe_A/55/ZNA-2000-55a-0902.pdf 
 Identifier    ZNA-2000-55a-0902 
 Volume    55