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Showing 1 to 9 of 9 for “"photodimerization"”.

  1. Synthesis and Characterization of Tailored Photoactive Macromolecules

    … Both functional groups undergo a [2π + 2π] photodimerization reaction (coumarin groups in the UVA and cinnamate groups in the UVB), which was utilized to crosslink and chain-extend macromolecules. Coumarin dimers possess the additional ability to photocleave and thus reverse when irradiated …

    vt Repository record for Synthesis and Characterization of Tailored Photoactive Macromolecules (opens in a new tab)

  2. Synthesis and Use of a Tetradentate Ligand With C4v Symmetry: 1alpha, 2alpha, 3alpha, 4alpha-Tetrahydroxy- 1beta, 2beta, 3beta, 4beta-Tetramethylcyclobutane

    … is presented. The stereospecific intramolecular photodimerization of an enediol pyrophosphate is described. Hydrolysis of the photoproduct from this reaction gives $1\alpha,2\alpha,3\alpha,4\alpha$-tetrahydroxy-$1\beta,2\beta,3\beta,4\beta$-tetramethylcyclobutane, 1, a tetradentate ligand with …

    uiuc Repository record for Synthesis and Use of a Tetradentate Ligand With C4v Symmetry: 1alpha, 2alpha, 3alpha, 4alpha-Tetrahydroxy- 1beta, 2beta, 3beta, 4beta-Tetramethylcyclobutane (opens in a new tab)

  3. CRYSTAL ENGINEERING STUDIES ON THE MOLECULAR SALTS AND SILVER(I) COORDINATION COMPOUNDS FOR [2+2] CYCLOADDITION REACTION IN THE SOLID STATE

    … anions in the selective preorganization before photodimerization and the acid catalysed isomerisation of the cyclobutane derivatives have been explored. It also has been shown how the cooperation of various supramolecular interactions with argentophilic interaction resulted in parallel alignment …

    nus Repository record for CRYSTAL ENGINEERING STUDIES ON THE MOLECULAR SALTS AND SILVER(I) COORDINATION COMPOUNDS FOR [2+2] CYCLOADDITION REACTION IN THE SOLID STATE (opens in a new tab)

  4. SYNTHESIS OF NATURAL PRODUCT NEPETANUDONE THROUGH THERMALLY FORBIDDEN [4Π+4Π] CYCLOADDITION IN THE PRESENCE OF LIGHT

    … dienol intermediates, Paterno-Buchi reaction, photodimerization, photo-claisen rearrangement etc [1]. These reactions have been used to either support the biosynthesis of these compounds or they provide an alternate and easy synthetic route. The natural product Nepetanudone was first isolated …

    wfu Repository record for SYNTHESIS OF NATURAL PRODUCT NEPETANUDONE THROUGH THERMALLY FORBIDDEN [4Π+4Π] CYCLOADDITION IN THE PRESENCE OF LIGHT (opens in a new tab)

  5. Gegenseitige Beeinflussung von Mizellaren Strukturen und Photodimerisierung von Cumarinderivaten

    In dieser Arbeit wurde die gegenseitige Beeinflussung von mizellaren Strukturen und Photodimerisierung von Cumarinderivaten untersucht. Als Mizellbildner wurden das kationische Cetyltrimethylammoniumbromid (CTAB) und das nicht-ionische Triton X-100, als Solubilisate Cumarinderivaten verwendet. Es …

    qucosa-diss

  6. Untersuchungen zum Einfluss von Substituenten auf die spektralen und photochemischen Eigenschaften sowie die Molekülstruktur von Dibenz[b,f]azepinen

    Im Mittelpunkt der Arbeit standen Untersuchungen zu Struktur-Eigenschafts-Beziehungen bei Dibenzazepinen. Ausgehend von Iminostilben (5H-Dibenzazepin) wurden Derivate mit unterschiedlichen Substituenten am Azepinstickstoff sowie in der 10-Position des Azepinringes dargestellt und hinsichtlich ihrer …

    qucosa-diss

  7. Photochemische Fixierung von Strukturen in Grenzflächen mit polymeren Bürsten

    Binäre Polymerbürsten bestehen aus zwei verschiedenen Polymertypen, die nebeneinander auf dem gleichen Trägermaterial verankert sind. Wenn diese Polymere unterschiedliche Benetzungseigenschaften haben, können damit schaltbare Oberflächen produziert werden. Abhängig vom Lösungsmittel, dem man die …

    qucosa-diss