Probing the nature of donor–acceptor effects in conjugated materials: a joint experimental and computational study of model conjugated oligomers

Abstract

Model dimers consisting of a traditional strong donor, a traditional strong acceptor, and ambipolar thieno[3,4-b]pyrazine were studied to provide a deeper understanding of donor–acceptor interactions and their application to conjugated materials.

Effect of a benzothiadiazole spacer on transport properties and N-doping of naphthalene-diimide-based copolymers

“…For both D–A copolymers, a broad absorption band at lower energy (∼600–785 nm) is observed and attributed to the internal charge transfer (ICT) absorption band between the donor and acceptor units. 33 When deposited as thin films, no obvious change in the S 0 –S 1 transition bands is observed. As previously reported, 34 no change in the ICT band is observed for P(NDI-T-BTD-T).…”

Bis(benzoselenadiazol)ethane: A π‐Extended Acceptor‐Dimeric Unit for Ambipolar Polymer Transistors with Hole and Electron Mobilities Exceeding 10 cm2 V−1 s−1

“…The synthesis and characterization details are described in the Supporting Information. 5,11-Dibromo-2,8bis(2-decyltetradecyl)thieno [3',2' : 5,6]benzo [1,2,3,4lmn]thieno [2,3-f] [3,8]phenanthroline-1,3,7,9(2H,8H)-tetraone (NDTIÀ Br) and (E)-1,2-bis(7-(4-hexyl-5-(trimethylstannyl)thiophen-2-yl)benzo[c][1,2,5]thiadiazol-4yl)ethane(BBTE-Tin) were prepared according to the literature procedures. [16,17c] Specifically, the important intermedi- sorption/ionization coupled to time-of-flight (MALDI-TOF) mass spectra.…”

Bis(benzoselenadiazol)ethane: A π‐Extended Acceptor‐Dimeric Unit for Ambipolar Polymer Transistors with Hole and Electron Mobilities Exceeding 10 cm2 V−1 s−1

“…BBT can be prepared efficiently through homocoupling of bromobenzothiadiazole under the mild conditions of Zn/ Ni(dppp)Cl 2 /Bu 4 NBr in a high yield over 80 %. [8] Besides BBT unit, other acceptor-dimeric electron-deficient units are also reported (Figure S1). For instance, Guo et al developed a series of bis-diketopyrrolopyrrole (2DPP) based polymers (P1À P7, see Figure S1), which show deeplying LUMO energy levels and excellent ambipolar charge transport properties with both μ h and μ e over 3 cm 2 V À 1 s À 1 .…”