Photochemistry and photophysics of stilbene dendrimers and related compounds |
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| Institution: | 1. Ural Federal University, 620002 Ekaterinburg, Russia;2. Institute of Solid State Chemistry, Ural Branch of the Russian Academy of Sciences, 620990 Ekaterinburg, Russia;1. College of Chemical Engineering, Nanjing Forestry University, Nanjing 210037, China;2. Coordination Chemistry Institute, State Key Laboratory of Coordination Chemistry, Nanjing University, Nanjing 210093, China;3. College of Science, Nanjing Forestry University, Nanjing 210037, China;4. Institute of Inorganic Chemistry, Karlsruhe Institute of Technology (KIT), Engesserstrasse 15, D-76131 Karlsruhe, Germany;1. CNRS Laboratory UMR 5623, University Paul Sabatier, 118 route de Narbonne, F-31062 Toulouse Cedex 4, France;2. Photochemistry Center, Russian Academy of Sciences, 7a, bld.1, Novatorov Street, Moscow 119421, Russia;3. N.D. Zelinsky Institute of Organic Chemistry, Russian Academy of Sciences, 47, Leninsky Prospect, Moscow 119991, Russia |
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| Abstract: | The syntheses and reactions of photoresponsive dendrimers are described. Dendrimers with photoreversible stilbene cores undergo mutual cis–trans isomerization in organic solvents to give photostationary state mixtures of cis- and trans-isomers. Even stilbene dendrimers with molecular weights as high as 6500 underwent mutual cis–trans isomerization within the lifetime of the excited singlet state. The large dendron group surrounding the photoreactive core may affect the excited state properties of the core to induce the efficiency of photoisomerization and/or reduce the fluorescence efficiency. The photochemistry of stilbene dendrimers, with various types of dendron groups, azobenzene dendrimers and other photoresposive dendrimers is discussed. |
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