A π-conjugated system with flexibility and rigidity that shows environment-dependent RGB luminescence

Chunxue Yuan, Shohei Saito, Cristopher Camacho, Stephan Irle, Ichiro Hisaki, Shigehiro Yamaguchi

Research output: Contribution to journalArticlepeer-review

181 Scopus citations

Abstract

We have designed and synthesized a π-conjugated system that consists of a flexible and nonplanar π joint and two emissive rigid and planar wings. This molecular system exhibits respectively red, green, and blue (RGB) emission from a single-component luminophore in different environments, namely in polymer matrix, in solution, and in crystals. The flexible unit gives rise to a dynamic conformational change in the excited state from a nonplanar V-shaped structure to a planar structure, leading to a dual fluorescence of blue and green colors. The rigid and planar moieties favor the formation of a two-fold π-stacked array of the V-shaped molecules in the crystalline state, which produces a red excimer-like emission. These RGB emissions are attained without changing the excitation energy.

Original languageEnglish
Pages (from-to)8842-8845
Number of pages4
JournalJournal of the American Chemical Society
Volume135
Issue number24
DOIs
StatePublished - Jun 19 2013
Externally publishedYes

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