title: Fluorescence Modulation and Photochromism in Azobismaleimide Derivatives.
abstract: A fluorophore-photochrome system incorporating an aryleneimine type fluorophore and an azobismaleimide photochrome was developed and the photochemical properties of this system were investigated. The photoisomerization of trans-azoaromatic chromophore leads to the increase of the fluorescence intensity of fluorophore. The cis azobismaleimide isomers revert photochemically to the trans form and the emission intensity decreases. The fluorescence intensity of the imine fluorophore can be modulated under irradiation with UV and visible (436 nm) light due to reversible trans-cis-trans photoisomerization of azobismaleimide partner. The photoisomerization kinetics was obeyed a first-order relationship with a rate constant of 1.95 × 10(-2) s(-1) for azobismaleimide/imine fluorophore system and for polyazothioetherimide/imine derivative the kinetics was described by a biexponential equation.
authors.affiliation: "Petru Poni" Institute of Macromolecular Chemistry, 41A Aleea Grigore Ghica Voda, 700487, Iasi, Romania.
authors.forename: Nicusor
authors.initials: N
authors.lastname: Fifere
authors.affiliation: "Petru Poni" Institute of Macromolecular Chemistry, 41A Aleea Grigore Ghica Voda, 700487, Iasi, Romania. airineia@icmpp.ro.
authors.forename: Anton
authors.initials: A
authors.lastname: Airinei
authors.affiliation: "Petru Poni" Institute of Macromolecular Chemistry, 41A Aleea Grigore Ghica Voda, 700487, Iasi, Romania.
authors.forename: Constantin
authors.initials: C
authors.lastname: Gaina
authors.affiliation: "Petru Poni" Institute of Macromolecular Chemistry, 41A Aleea Grigore Ghica Voda, 700487, Iasi, Romania.
authors.forename: Viorica
authors.initials: V
authors.lastname: Gaina
authors.affiliation: "Petru Poni" Institute of Macromolecular Chemistry, 41A Aleea Grigore Ghica Voda, 700487, Iasi, Romania.
authors.forename: Mircea
authors.initials: M
authors.lastname: Grigoras
keywords: Azobismaleimide; Fluorescence modulation; Photoisomerization; Photoswitching; UV–vis absorption spectra
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