title: Tunable Visible and Near Infrared Photoswitches.
abstract: A class of tunable visible and near-infrared donor-acceptor Stenhouse adduct (DASA) photoswitches were efficiently synthesized in two to four steps from commercially available starting materials with minimal purification. Using either Meldrum's or barbituric acid "acceptors" in combination with aniline-based "donors", an absorption range spanning from 450 to 750 nm is obtained. Additionally, photoisomerization results in complete decoloration for all adducts, yielding fully transparent, colorless solutions and films. Detailed investigations using density functional theory, nuclear magnetic resonance, and visible absorption spectroscopies provide valuable insight into the unique structure-property relationships for this novel class of photoswitches. As a final demonstration, selective photochromism is accomplished in a variety of solvents and polymer matrices, a significant advantage for applications of this new generation of DASAs.
authors.forename: James R
authors.initials: JR
authors.lastname: Hemmer
authors.forename: Saemi O
authors.initials: SO
authors.lastname: Poelma
authors.forename: Nicolas
authors.initials: N
authors.lastname: Treat
authors.forename: Zachariah A
authors.initials: ZA
authors.lastname: Page
authors.forename: Neil D
authors.initials: ND
authors.lastname: Dolinski
authors.forename: Yvonne J
authors.initials: YJ
authors.lastname: Diaz
authors.affiliation: Department of Physics, Naval Postgraduate School , 1 University Circle, Monterey, California 93943, United States.
authors.forename: Warren
authors.initials: W
authors.lastname: Tomlinson
authors.forename: Kyle D
authors.initials: KD
authors.lastname: Clark
authors.affiliation: Department of Physics, Naval Postgraduate School , 1 University Circle, Monterey, California 93943, United States.
authors.forename: Joseph P
authors.initials: JP
authors.lastname: Hooper
authors.forename: Craig
authors.initials: C
authors.lastname: Hawker
authors.forename: Javier
authors.initials: J
authors.lastname: Read de Alaniz