title: Novel helical assembly of a Pt(II) phenylbipyridine complex directed by metal-metal interaction and aggregation-induced circularly polarized emission.
abstract: Pt(ii) phenylbipyridine complexes possessing bis(phenylisoxazolyl)phenylacetylene ligands self-assembled to form stacked aggregates via Pt-Pt, π-π stacking, and dipole-dipole interactions. The assembled structures were influenced by the solvent properties. Non-helical assemblies found in chloroform displayed metal-metal-to-ligand charge transfer absorption and emission, whereas helical assemblies formed in toluene showed aggregation-induced enhancement of emission and aggregation-induced circularly polarized luminescence. The rates of the association and dissociation of the assemblies were significantly reduced in toluene, and the non-helical structures formed in chloroform were surprisingly memorized.
authors.affiliation: Department of Chemistry, Graduate School of Science, Hiroshima University, Higashi-hiroshima 739-8526, Japan. haino@hiroshima-u.ac.jp.
authors.forename: Toshiaki
authors.initials: T
authors.lastname: Ikeda
authors.forename: Midori
authors.initials: M
authors.lastname: Takayama
authors.forename: Jatish
authors.initials: J
authors.lastname: Kumar
authors.forename: Tsuyoshi
authors.initials: T
authors.lastname: Kawai
authors.forename: Takeharu
authors.initials: T
authors.lastname: Haino