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The asymmetric introduction of functional groups into polymers is promising due to its potential to provide novel electronic and magnetic properties. Though traditional on-surface bottom-up synthesis has succeeded in creating various types of polymers, it struggles at realizing asymmetry due to the difficulty of stereoregular polymerization and the tendency for overall polarity cancellation during agglomeration. Here, enabled by the low halogen-contaminated metal surfaces provided by two-zone chemical vapor deposition, “compass” precursors possessing three independent bonding, edge, and dipole vectors undergo isotactic polymerization via the vectorial self-assembly of chiral precursor diradicals without the need for chiral catalysts required in conventional in-solution polymerization. The isotactic polymers exhibit polar 2D crystalline structures due to the hetero-edge CH–π interaction between the standing phenyl and butoxy group surpassing the homo-edge interactions of π–π and CHCH. The developed vectorial on-surface synthetic technique not only paves the way to the realization of stereoregular control but also unlocks unprecedented crystal engineering.

権利情報:

• Creative Commons BY Attribution 4.0 International
  

キーワード: on-surface synthesis, 2D polymer crystals

刊行年月日: 2023-06-16

出版者: Wiley

掲載誌:

• Advanced Materials Interfaces (ISSN: 21967350) vol. 10 issue. 23 2300214

研究助成金:

原稿種別: 出版者版 (Version of record)

MDR DOI:

公開URL: https://doi.org/10.1002/admi.202300214

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更新時刻: 2024-01-05 22:12:22 +0900

MDRでの公開時刻: 2023-12-28 16:30:24 +0900