Synthesis of folded H-stacking skipped π polymers consisting of different 2-substituted trimethylene tethering units and their optical and conductive property

[摘要] A series of polymers P1-P4 ([-CH2CH(Z)CH2-(pi conjugated unit)-](n) where Z = a bulky substituent) were synthesized via the Suzuki-Miyaura coupling polymerization and predominantly existed in their folded H-stacking form in the solution and film, which was evidenced by ultraviolet absorption, fluorescent behavior, and X-ray diffraction analysis. The morphology of the polymers in the solid states was dependent on the structure of the Z group present. The conductive nature of Pl-P4 was preliminarily demonstrated on hole-only devices. Moreover, a similar onset voltage was observed for Pl-P3, which all contained the same pi units; however, their current-voltage characteristics were highly dependent on the Z structure. P4, which contained cross-conjugated pi units, exhibited a relatively high conductivity with a lower onset requirement.

[发布日期] 2021-09-16

[关键词] Folded H-Stacking polymer;Skipped pi polymer;Conductive polymer