Kavli Affiliate: Zhuo Li
| First 5 Authors: Shaoshan Wang, Zhuo Li, Pengcheng Ding, Cristina Mattioli, Wujun Huang
| Summary:
On-surface synthesis (OSS) involving relatively high energy barriers remains
challenging due to a typical dilemma: firm molecular anchor is required to
prevent molecular desorption upon the reaction, whereas sufficient lateral
mobility is crucial for subsequent coupling and assembly. By locking the
molecular precursors on the substrate then unlocking them during the reaction,
we present a strategy to address this challenge. High-yield synthesis based on
well-defined decarboxylation, intermediate transition and hexamerization is
demonstrated, resulting in an extended and ordered network exclusively composed
of the newly-synthesized macrocyclic compound. Thanks to the steric hindrance
of its maleimide group, we attain a preferential selection of the coupling.
This work unlocks a promising path to enrich the reaction types and improve the
coupling selectivity hence the structual homogeneity of the final product for
OSS.
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