Chemical Research in Chinese Universities ›› 2014, Vol. 30 ›› Issue (3): 425-430.doi: 10.1007/s40242-014-3518-z

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Syntheses, Electrochemical Behaviors, Spectral Properties and DFT Calculations of Two 1,3-Dithiole Derivatives

NIU Zhigang1, LI Dachao1, LIU Dong1, XIA Dong1, ZOU Ying1, SUN Wei1, LI Gaonan1,2   

  1. 1. College of Chemistry and Chemical Engineering, Hainan Normal University, Haikou 571158, P. R. China;
    2. State Key Laboratory of Coordination Chemistry, School of Chemistry and Chemical Engineering, Nanjing University, Nanjing 210093, P. R. China
  • Received:2013-11-27 Revised:2014-02-25 Online:2014-06-01 Published:2014-03-11
  • Contact: LI Gaonan E-mail:ligaonan2008@163.com
  • Supported by:

    Supported by the National Innovation Experiment Program for University Students of China(Nos.201311658021, 201311658023), the Science and Research Project of Education Department of Hainan Province, China(No.Hjkj2013-25) and the Scientific Research Foundation for Young Teachers of Hainan Normal University, China(No.QN1337).

Abstract:

Two new 1,3-dithiole derivatives, 4,4'-{9-[4,5-bis(methylthio)-1,3-dithiol-2-ylidene]-9H-fluorene-2,7-diyl} dipyridine(2a) and 3,3'-{9-[4,5-bis(methylthio)-1,3-dithiol-2-ylidene]-9H-fluorene-2,7-diyl} dipyridine(2b) were synthesized and characterized by Fourier transform infrared(FTIR), 1H NMR, 13C NMR and mass spectroscopies. The crystal structure of compound 2b was also studied. The optimized conformations and molecular orbital diagrams of compounds 2a and 2b were illustrated via density functional theory(DFT). By the time-dependent DFT(TD-DFT) method, electronic absorption spectra of compounds 2a and 2b were predicted and the results achieved were in good agreement with the experimental data. The formation of the cationic radical during the electrochemical oxidation process was also proposed.

Key words: 1,3-Dithiole derivative, Pyridine, X-Ray diffraction, Linear sweep voltammetry, Density functional theory(DFT) calculation