title: Controlling photochromism between fluoroalkyl end-capped oligomer/polyaniline and N,N'-diphenyl-1,4-phenylenediamine nanocomposites induced by UV-light-responsive titanium oxide nanoparticles.
abstract: Colloidal stable fluoroalkyl end-capped 2-(methacryloyloxy)ethanesulfonic acid oligomer [R(F)-(MES)(n)-R(F)]/polyaniline[PAn]/TiO(2) nanocomposites and R(F)-(MES)(n)-R(F)/An-dimer (An-dimer: N,N'-diphenyl-1,4-phenylenediamine)/TiO(2) nanocomposites were prepared by the interactions of TiO(2) nanoparticles with R(F)-(MES)(n)-R(F)/PAn nanocomposites or R(F)-(MES)(n)-R(F)/An-dimer nanocomposites, which were prepared by the composite reaction of R(F)-(MES)(n)-R(F) oligomer with PAn or An-dimer. These two types of fluorinated TiO(2) nanocomposites can exhibit quite different photochromic behaviors: R(F)-(MES)(n)-R(F)/PAn/TiO(2) nanocomposites can exhibit a reversible wavelength change for polaron absorptions around 760-820 nm by alternation of UV irradiation and storage in the dark; in contrast, R(F)-(MES)(n)-R(F)/An-dimer/TiO(2) nanocomposites can exhibit a reversible color change from blue to colorless (a reversible absorbance change) by the similar treatment.
authors.affiliation: Department of Frontier Materials Chemistry, Graduate School of Science and Technology, Hirosaki University, Bunkyo-cho, Hirosaki, Japan. hideosaw@cc.hirosaki-u.ac.jp
authors.forename: Hideo
authors.initials: H
authors.lastname: Sawada
authors.forename: Taiki
authors.initials: T
authors.lastname: Tsuzuki-ishi
authors.forename: Tetsushi
authors.initials: T
authors.lastname: Kijima
authors.forename: Jun
authors.initials: J
authors.lastname: Kawakami
authors.forename: Mari
authors.initials: M
authors.lastname: Iizuka
authors.forename: Masato
authors.initials: M
authors.lastname: Yoshida
mesh_terms: D000814:Aniline Compounds / Q000737:chemistry*; D053761:Nanocomposites / Q000737:chemistry*; D053758:Nanoparticles / Q000737:chemistry*; D010655:Phenylenediamines / Q000737:chemistry*; D010777:Photochemistry; D014025:Titanium / Q000737:chemistry*; D014466:Ultraviolet Rays
chemical_list: D000814:Aniline Compounds; D010655:Phenylenediamines; C416807:polyaniline; C009495:titanium dioxide; D014025:Titanium; C004845:N,N'-diphenyl-4-phenylenediamine