title: A π-conjugated system with flexibility and rigidity that shows environment-dependent RGB luminescence.
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.
authors.affiliation: Department of Chemistry, Graduate School of Science, Nagoya University, Furo, Chikusa, Nagoya 464-8602, Japan.
authors.forename: Chunxue
authors.initials: C
authors.lastname: Yuan
authors.forename: Shohei
authors.initials: S
authors.lastname: Saito
authors.forename: Cristopher
authors.initials: C
authors.lastname: Camacho
authors.forename: Stephan
authors.initials: S
authors.lastname: Irle
authors.forename: Ichiro
authors.initials: I
authors.lastname: Hisaki
authors.forename: Shigehiro
authors.initials: S
authors.lastname: Yamaguchi
mesh_terms: D003460:Crystallization; D049408:Luminescent Agents / Q000737:chemistry*; D008958:Models, Molecular; D008968:Molecular Conformation; D011108:Polymers / Q000737:chemistry; D012996:Solutions
chemical_list: D049408:Luminescent Agents; D011108:Polymers; D012996:Solutions