Synthesis and Characterization of n-Doped Poly(benzodifurandione) (n-PBDF) Derivatives via Aromatic Substitution

• DOI: 10.1021/acs.macromol.4c02386
• Publication Date: 2024-11-13T11:02:08Z
• Authors: Mustafa H. Ahmed; Jinhyo Hwang; Bufan Xiao; Matthew R. Schiavone; Jagrity Chaudhary; Min Chen; Jianguo Mei
• Keywords: Substitution (logic); Characterization

n-Doped poly(benzodifurandione) (n-PBDF) is an n-type conducting polymer with characteristics such as high electrical conductivity, solution processability, and weathering stability. Here, we systematically investigate the structure property relationship on impact of structural modifications through aromatic substitution photophysical, electrical, properties n-PBDF its oligomeric derivatives. We demonstrated that electron donation group (methyl) raised highest occupied molecular orbital energy level (+0.15 eV), while electron-withdrawing halogens (Br Cl) decreased lowest unoccupied (−0.12 −0.13 eV, respectively) in polymers. Additionally, both undoped doped systems, these substitutions introduce large torsion angles (θ > 17°), causing material to twist significantly. Moreover, methyl-substituted polymer, n-PBDF-Me, was evaluated for potential a transparent organic conductor, due optical transmittance (T550 93%). However, n-PBDF-Me films have significantly lower conductivity than (0.40 vs 1330 S/cm) at similar thickness.