title: Mechanochromic luminescence characteristics of pyridine-terminated chromophores in the solid state and in a poly(vinyl alcohol) matrix.
abstract: Mechanoresponsive luminophores containing different substituted pyridine rings at the molecular terminus are synthesized and their photoluminescence properties are investigated. The solid chromophore with a 4-substituted pyridine ring exhibits a reversible photoluminescent color change, while the 2-substituted chromophore shows only a small change in luminescence, and the 3-substituted chromophore displays an irreversible photoluminescent color change with mechanical grinding. A change of the sample color in response to mechanical grinding is also achieved for a dye-dispersed poly(vinyl alcohol) film. Furthermore, a simultaneous acid and mechanoresponsive photoemission color change is achieved in the dye-dispersed film.
authors.affiliation: Department of Materials Science and Chemistry, University of Hyogo, 2167 Shosha, Himeji, 671-2280 (Japan), Fax: (+81) 79-267-4014. mizuho-k@eng.u-hyogo.ac.jp.
authors.forename: Mizuho
authors.initials: M
authors.lastname: Kondo
authors.forename: Seiya
authors.initials: S
authors.lastname: Miura
authors.forename: Kentaro
authors.initials: K
authors.lastname: Okumoto
authors.forename: Mayuko
authors.initials: M
authors.lastname: Hashimoto
authors.forename: Nobuhiro
authors.initials: N
authors.lastname: Kawatsuki
keywords: mechanochromic luminescence; sensors; solid-state photoemission; solvatochromism