A computational study on 4,7-di(furan-2-yl)benzo[c][1,2,5]thiadiazole monomer and its oligomers

KAYI H.

JOURNAL OF MOLECULAR MODELING, cilt.20, sa.6, 2014 (SCI-Expanded) identifier

  • Yayın Türü: Makale / Tam Makale
  • Cilt numarası: 20 Sayı: 6
  • Basım Tarihi: 2014
  • Doi Numarası: 10.1007/s00894-014-2269-6
  • Dergi Adı: JOURNAL OF MOLECULAR MODELING
  • Derginin Tarandığı İndeksler: Science Citation Index Expanded (SCI-EXPANDED), Scopus
  • Anahtar Kelimeler: Band gap, Benzothiadiazole, Conjugated polymer, DFT, Donor-acceptor-donor type polymer, Furan, HOMO, LUMO, MOLECULAR-ORBITAL METHODS, EFFECTIVE CORE POTENTIALS, GAUSSIAN-TYPE BASIS, AB-INITIO, ELECTRONIC-STRUCTURE, SOLAR-CELL, STRENGTH, DESIGN
  • Ankara Üniversitesi Adresli: Hayır

Özet

The energy gap, Eg, between the highest occupied molecular orbital (HOMO) and the lowest unoccupied molecular orbital (LUMO) energy levels that determines the electronic and optical properties of 4,7-di(furan-2yl)benzo[c][1,2,5]thiadiazole (FSF) polymer is calculated by performing quantum chemical calculations. First, we theoretically investigated the most stable conformers of FSF monomer and its corresponding oligomers at the B3LYP/6-31G(d) and B3LYP/LANL2DZ levels of theory. We reveal the theoretical molecular structure of this very recently synthesized novel monomer and its oligomers for the first time in the literature. Our results from the B3LYP/6-31G(d) calculations indicated that FSF polymer has a low HOMO-LUMO gap of 1.55 eV to be in good agreement with the experiments. Experimental design and synthesis of novel conjugated polymers require time-consuming and expensive procedures. The findings from this study are promising for the use of computational methods in the design of the novel conjugated polymers, and help to narrow the materials to be used in design and synthesis of conjugated polymers with desired properties.