Interplay between structure and chiral properties of polyfluorene derivatives

POLYMER

卷:132

Article

Nowacki, Bruno^1,2  Zanlorenzi, Cristiano^1,3  Baev, Alexander²  Prasad, Paras N.²  Akcelrud, Leni¹ 

[1] Univ Fed Parana, Chem Dept, Paulo Scarpa Polymer Lab LaPPS, BR-81531980 Curitiba, Parana, Brazil

[2] Univ Buffalo State Univ New York, Inst Lasers Photon & Biophoton, Buffalo, NY 14260 USA

[3] Univ Sao Carlos, Sao Carlos Inst Phys, BR-13560970 Sao Carlos, SP, Brazil

关键词: Chiral polymers;    Polyfluorene derivatives;    Chirality parameter;    Helical polymers;    Theoretical calculations;   

DOI  :  10.1016/j.polymer.2017.07.082

来源: Elsevier

【 摘 要 】

Design of supramolecular organization to produce large optical activity involves multiple factors either internal as external. In this paper, we report on the synthesis, systematic study and theoretical modeling of a series of chiral polyfluorene derivatives, whereby we identify the main parameters controlling the chiroptical activity of polymer films. For each polymer, five empirical/theoretical properties were chosen, due to their effect on the chirality parameter: glass transition temperature, dissymmetry factor, molar mass, helix tightness and the inverse of interconversion energy. We introduce a radar graph exhibiting the influence of chirality metric on these five parameters and their interplay. The polygonal area in the radar graph and the chirality parameter presented a direct relationship. Such graph can provide prescreening of polymer properties, based on both experimental measurements and theoretical considerations and help choosing the right combination of parameters, leading to a material with the best properties. (C) 2017 Published by Elsevier Ltd.

【 授权许可】

Free