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Control of Crystallinity of Vinylene‐Linked Two‐Dimensional Conjugated Polymers by Rational Monomer Design
Author(s) -
Pastoetter Dominik L.,
Liu Yannan,
Addicoat Matthew A.,
Paasch Silvia,
Dianat Arezoo,
Bodesheim David,
Waentig Albrecht L.,
Xu Shunqi,
Borrelli Mino,
Croy Alexander,
Richter Marcus,
Brunner Eike,
Cuniberti Gianaurelio,
Feng Xinliang
Publication year - 2022
Publication title -
chemistry – a european journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.687
H-Index - 242
eISSN - 1521-3765
pISSN - 0947-6539
DOI - 10.1002/chem.202104502
Subject(s) - crystallinity , conjugated system , quinoxaline , monomer , materials science , thermal stability , polymer , phenylene , polymer chemistry , phosphonate , aldehyde , density functional theory , condensation polymer , organic chemistry , chemistry , computational chemistry , composite material , catalysis
The interest in two‐dimensional conjugated polymers (2D CPs) has increased significantly in recent years. In particular, vinylene‐linked 2D CPs with fully in‐plane sp 2 ‐carbon‐conjugated structures, high thermal and chemical stability, have become the focus of attention. Although the Horner‐Wadsworth‐Emmons (HWE) reaction has been recently demonstrated in synthesizing vinylene‐linked 2D CPs, it remains largely unexplored due to the challenge in synthesis. In this work, we reveal the control of crystallinity of 2D CPs during the solvothermal synthesis of 2D‐poly(phenylene‐quinoxaline‐vinylene)s (2D‐PPQVs) and 2D‐poly(phenylene‐vinylene)s through the HWE polycondensation. The employment of fluorinated phosphonates and rigid aldehyde building blocks is demonstrated as crucial factors in enhancing the crystallinity of the obtained 2D CPs. Density functional theory (DFT) calculations reveal the critical role of the fluorinated phosphonate in enhancing the reversibility of the (semi)reversible C−C single bond formation.