| 초록 |
Head-to-head (HH) linkage-based polymers have traditionally been avoided resulting from the induced backbone torsion which can lead to poor π-π overlap and reduced crystallinity. However, even in the presence of HH linkages, the replacement of hydrogen atoms with electronegative fluorine or oxygen atoms can attain the intramolecular noncovalent interactions in conjugated polymer structure, employing the concept of conformational locks. Furthermore, depending on the intrinsic characteristics of substituent atoms such as electron withdrawing and electron donating abilities, the properties of polymers can be tuned. In this study, we systematically examined the effects of tailored conformational locks in isoindigo-based copolymer systems. Presence of electronegative atoms such as F and O in donor units could be considered very significant on the characteristics of polymer semiconductors. |
