Designed Synthesis of Stable Light-emitting Two-dimensional Sp Carbon-conjugated Covalent Organic Frameworks

Overview

Journal Nat Commun

Specialty Biology

Date 2018 Oct 10

PMID 30297692

Citations 29

Authors

Enquan Jin

Juan Li

Keyu Geng

Qiuhong Jiang

Hong Xu

Qing Xu

Donglin Jiang

Affiliations

Soon will be listed here.

Abstract

Covalent organic frameworks enable the topological connection of organic chromophores into π lattices, making them attractive for creating light-emitting polymers that are predesignable for both the primary- and high-order structures. However, owing to linkages, covalent organic frameworks are either unstable or poor luminescent, leaving the practical synthesis of stable light-emitting frameworks challenging. Here, we report the designed synthesis of sp carbon-conjugated frameworks that combine stability with light-emitting activity. The C=C linkages topologically connect pyrene knots and arylyenevinylene linkers into two-dimensional all sp carbon lattices that are designed to be π conjugated along both the x and y directions and develop layer structures, creating exceptionally stable frameworks. The resulting frameworks are capable of tuning band gap and emission by the linkers, are highly luminescent under various conditions and can be exfoliated to produce brilliant nanosheets. These results suggest a platform based on sp carbon frameworks for designing robust photofunctional materials.

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