Strong Bathochromic Shift of Conjugated Polymer Nanowires Assembled with a Liquid Crystalline Alkyl Benzoic Acid via a Film Dispersion Process
- 주제(기타) Chemistry, Multidisciplinary
- 설명문(일반) [Jeon, Byoung Yun; Kidanemariam, Alemayehu; Jeon, Yejee; Park, Juhyun] Chung Ang Univ, Sch Chem Engn & Mat Sci, Dept Intelligent Energy & Ind, Seoul 06974, South Korea; [Noh, Juran] Texas A&M Univ, Dept Mat Sci & Engn, College Stn, TX 77843 USA; [Hyun, Chohee; Mun, Hyun Jung; Shin, Tae Joo] Ulsan Natl Inst Sci & Technol UNIST, UNIST Cent Res Facil, Ulsan 44919, South Korea; [Hyun, Chohee; Mun, Hyun Jung; Shin, Tae Joo] Ulsan Natl Inst Sci & Technol UNIST, Sch Nat Sci, Ulsan 44919, South Korea; [Park, Kangho; Jung, Hee-Tae] Korea Adv Inst Sci & Technol, Dept Chem & Biomol Engn BK 21 Plus, Daejeon 34141, South Korea; [Park, Kangho; Jung, Hee-Tae] Korea Adv Inst Sci & Technol, KAIST Inst Nano Century, Daejeon 34141, South Korea; [Jung, Seung-Jin; Park, JaeHong] Ewha Womans Univ, Dept Chem & Nanosci, Seoul 03760, South Korea; [Yoo, Pil J.] Sungkyunkwan Univ, Sch Chem Engn, SKKU Adv Inst Nanotechnol SAINT, Suwon 16419, South Korea
- 등재 SCIE, SCOPUS
- OA유형 Green Published
- 발행기관 AMER CHEMICAL SOC
- 발행년도 2021
- 총서유형 Journal
- URI http://www.dcollection.net/handler/ewha/000000191141
- 본문언어 영어
- Published As https://doi.org/10.1021/acsomega.1c05556
- PubMed https://pubmed.ncbi.nlm.nih.gov/34963971
초록/요약
We present aqueous dispersions of conjugated polymer nanowires (CPNWs) with improved light absorption properties aimed at aqueous-based applications. We assembled films of a donor-acceptor-type conjugated polymer and liquid crystalline 4-n-octylbenzoic acid by removing a cosolvent of their mixture solutions, followed by annealing of the films, and then formed aqueous-dispersed CPNWs with an aspect ratio >1000 by dispersing the films under ultrasonication at a basic pH. X-ray and spectroscopy studies showed that the polymer and liquid crystal molecules form independent domains in film assemblies and highly organized layer structures in CPNWs. Our ordered molecular assemblies in films and aqueous dispersions of CPNWs open up a new route to fabricate nanowires of low-band-gap linear conjugated polymers with the absorption maximum at 794 nm remarkably red-shifted from 666 nm of CPNWs prepared by an emulsion process. Our results suggest the presence of semicrystalline polymorphs beta(1) and beta(2) phases in CPNWs due to long-range pi-pi stacking of conjugated backbones in compactly organized lamellar structures. The resulting delocalization with a reduced energy bang gap should be beneficial for enhancing charge transfer and energy-conversion efficiencies in aqueous-based applications such as photocatalysis.
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