Dithienothiophenes

D-π-D chromophores based on dithieno[3,2-b:2',3'-d]thiophene (DTT): Potential application in the fabrication of solar cell

“…[9][10] Generally, one of the strategies for fine-tuning the HOMO-LUMO gap involves the utilization of extended thiophene subunits 11 and particularly those rigid structures possessing an extended π-conjugation in the ground state, 12 such as thienothiophenes (TTs) and dithienothiophenes (DTTs). Thiophenes can be obtained from thienoacenes that are effective for increasing the intermolecular interactions and adjusting the band gap of organic materials in the solid state.…”

“…[13][14][15][16] Dithieno [3,2- structure. 9,[17][18][19] The first synthesis and spectroscopic assignments of DTT were reported in 1971. 20 The fused structure of DTT can promote π-stacking which is predicted to be a favourable motif for high charge transport in devices.…”

2,6-Bis(tributyltin)benzo[1,2-b:5,4-b’]dithiophene: a new synthon for organic semiconductors

“…This functionalization was then to be utilized in a cross-coupling protocol to extend the degree of π-conjugation within our materials by introduction of various electron-donating or -withdrawing aromatic groups. However, bromination of 5b with two equivalents of NBS in analogy to reported procedures for somewhat related dithienothiophenes 21 gave only an inseparable mixture of several brominated products.…”

Fused thiophenes: an overview of the computational investigations

“…36 Organic acceptor and donor molecules based on DTT were used for the preparation of different cation radical salts and charge-transfer complexes. 37,38 Acenes are polycyclic aromatic hydrocarbons consisting of linearly fused benzene rings. Although acenes containing five or more fused aromatic rings have been long known as promising materials for organic electronic devices, 39 their instabilities against light and air hamper their use in material chemistry.…”