title: Ultrasound-induced emission enhancement based on structure-dependent homo- and heterochiral aggregations of chiral binuclear platinum complexes.
abstract: Instant and precise control of phosphorescent emission can be performed by ultrasound-induced gelation of organic liquids with chiral, clothespin-shaped trans-bis(salicylaldiminato)Pt(II) complexes, anti-1. Nonemissive solutions of racemic, short-linked anti-1a (n = 5) and optically pure, long-linked anti-1c (n = 7) in organic liquids are transformed immediately into stable phosphorescent gels upon brief irradiation of low-power ultrasound. Emission from the gels can be controlled by sonication time, linker length, and optical activity of the complexes. Several experimental results indicated that structure-dependent homo- and heterochiral aggregations and ultrasound-control of the aggregate morphology are key factors for emission enhancement.
authors: Department of Chemistry, Graduate School of Engineering Science, Osaka University, Machikaneyama, Toyonaka, Osaka 560-8531, Japan.
authors: Naruyoshi
authors: N
authors: Komiya
authors: Takako
authors: T
authors: Muraoka
authors: Masayuki
authors: M
authors: Iida
authors: Maiko
authors: M
authors: Miyanaga
authors: Koichi
authors: K
authors: Takahashi
authors: Takeshi
authors: T
authors: Naota
mesh_terms: D005782:Gels / Q000737:chemistry*; D049408:Luminescent Agents / Q000737:chemistry*; D009944:Organoplatinum Compounds / Q000737:chemistry*; D014465:Ultrasonics
chemical_list: D005782:Gels; D049408:Luminescent Agents; D009944:Organoplatinum Compounds