https://scholars.lib.ntu.edu.tw/handle/123456789/598119
標題: | Investigating the backbone conformation and configuration effects for donor-acceptor conjugated polymers with ladder-type structures synthesized through Aldol polycondensation | 作者: | Huang, Y.-W. Lin, Y.-C. Li, J.-S. WEN-CHANG CHEN CHU-CHEN CHUEH |
關鍵字: | Condensation reactions;Fracture mechanics;Hole mobility;Ketones;Ladders;Morphology;Polycondensation;Shims;Surface morphology;Surface roughness;Thiophene;Aldol reactions;Amorphous structures;Conformation and configuration;Conformational flexibility;Donor-acceptor conjugated polymers;Electron-deficient;Ladder-type structure;Low surface roughness;Conjugated polymers | 公開日期: | 2021 | 卷: | 9 | 期: | 30 | 起(迄)頁: | 9473-9483 | 來源出版物: | Journal of Materials Chemistry C | 摘要: | Aldol reaction is a green approach that is exclusively suitable for developing conjugated polymers (CPs) with ladder-type structures. Herein, electron-deficient non-fused and fused bis-isoindigo (bis-IID) are copolymerized with axisymmetric thiophene (T) or centrosymmetric thieno[3,2-b]thiophene (TT) electron-rich spacers through Aldol polycondensation to prepare four donor-acceptor (D-A) CPs with ladder-type structures. The non-fused (P1andP2) and fused (P3andP4) bis-IIDs on the backbone lead to varied conformational flexibility that dominates aggregation, energy levels, and packing of the polymers.P3andP4with a planar backbone exhibit a stronger aggregation and lower bandgap (1.38 eV) thanP1andP2(?1.8 eV), while their intense non-crystalline aggregation also results in an amorphous structure. Meanwhile, the configurational differences arising from axisymmetric T unit (P1andP3) and centrosymmetric TT unit (P2andP4) spacers is shown to deeply affect the surface morphology and film ductility. The non-planar backbone endowsP1andP3with low surface roughness and high brittleness. The combined low conformation and configuration regularity account for the inferior mobility ofP1. On the contrary,P2-P4exhibit comparable hole mobility ranging from 10?2-10?3cm2V?1s?1and up to 0.011 cm2V?1s?1(P2), due to their better regularity in both conformation and configuration. Collectively, our results provide a new perspective for designing new D-A CPs through Aldol polycondensation. ? The Royal Society of Chemistry 2021. |
URI: | https://www.scopus.com/inward/record.uri?eid=2-s2.0-85112627200&doi=10.1039%2fd1tc02116h&partnerID=40&md5=14c66f43b6b6f0a4a965e1bcf8e7d0f7 https://scholars.lib.ntu.edu.tw/handle/123456789/598119 |
ISSN: | 20507534 | DOI: | 10.1039/d1tc02116h |
顯示於: | 化學工程學系 |
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