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      https://www.ias.ac.in/article/fulltext/boms/042/04/0145

    • Keywords

       

      Organic thin film transistors (OTFTs); oligothiophenes; electron-deficient core; electro-optical properties; charge transfer.

    • Abstract

       

      In order to tune the optoelectronic and charge transfer properties of 4,6-di(thiophen-2-yl)pyrimidine (1), some new compounds were designed, i.e., 4,6-bis(benzo[$b$]thiophen-2-yl)pyrimidine (2), 4,6-bis(naphtho[2,3-b]thiophen-2-yl)pyrimidine (3), 4,6-bis(anthra[2,3-b]thiophen-2-yl)pyrimidine (4), 4,6-bis(tetraceno[2,3-$b$]thiophen-2-yl)pyrimidine (5) and 4,6-bis(pentaceno[2,3-$b$]thiophen-2-yl)pyrimidine (6). Compounds 2–6 were designed by assimilation of benzene, naphthalene, anthracene, tetracene and pentacene, respectively at both ends of compound 1. Integration of oligocene end cores reduces the energy gap resulting in a red shift in the absorption and fluorescence emission spectra. The legible intra-molecularcharge transfer is significant from electron-rich moieties to the electron-deficient core (pyrimidine). The elongation of $\pi$-conjugation led to escalate the electron affinity, lower the ionization potential and hole reorganization energy. The hole reorganization energies of compounds 3–6 exposed that these materials would be effective hole transport contenders to be used in diverse semiconductor devices.

    • Author Affiliations

       

      AHMAD IRFAN1 ABDULLAH G AL-SEHEMI1 MOHAMMED A ASSIRI1 MUHAMMAD WASEEM MUMTAZ2

      1. Department of Chemistry, Faculty of Science, King Khalid University, P.O. Box 9004, Abha 61413, Saudi Arabia
      2. Department of Chemistry, University of Gujrat, Gujrat, Punjab 50700, Pakistan
    • Dates

       
  • Bulletin of Materials Science | News

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