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- W3035861206 endingPage "23211" @default.
- W3035861206 startingPage "23203" @default.
- W3035861206 abstract "Nanoporous gold powder was functionalized in a two-step approach by an azide terminated alkanethiol self-assembled monolayer (SAM) and a zinc(ii) phthalocyanine (ZnPc) derivative by copper catalyzed azide-alkyne cycloaddition (CuAAC). A series of different hybrid systems with systematic variation of the alkyl chain length on both positions, the alkanethiol SAM and the peripheral substituents of the ZnPc derivative, was prepared and studied in the photooxidation of diphenylisobenzofuran (DPBF). An enhancement by nearly one order of magnitude was observed for the photosensitized singlet oxygen (1O2) generation of the hybrid systems compared to the same amount of ZnPc in solution caused by the interaction of the npAu surface plasmon resonance and the excited state of the immobilized sensitizer. This interaction was shown to be distance dependent, with decreasing activity for short SAMs with alkyl chain lengths < 6 methylene groups caused by quenching of the excited state via electron transfer as well as decreasing activity for SAMs with n > 8 methylene groups due to decreasing energy transfer for long distances. An unexpected distance dependent behaviour was observed for the variation of the peripheral alkyl chain on the photosensitizer revealing a planar orientation of the immobilized photosensitizer on the nanoporous gold surface by a penta-coordinated central zinc ion through interaction with free azide groups from the self-assembled monolayer." @default.
- W3035861206 created "2020-06-25" @default.
- W3035861206 creator A5006757503 @default.
- W3035861206 creator A5007607788 @default.
- W3035861206 creator A5010052064 @default.
- W3035861206 creator A5021985670 @default.
- W3035861206 creator A5023600111 @default.
- W3035861206 creator A5024359563 @default.
- W3035861206 creator A5025470711 @default.
- W3035861206 creator A5081068601 @default.
- W3035861206 creator A5084986122 @default.
- W3035861206 date "2020-01-01" @default.
- W3035861206 modified "2023-10-15" @default.
- W3035861206 title "Impact of photosensitizer orientation on the distance dependent photocatalytic activity in zinc phthalocyanine–nanoporous gold hybrid systems" @default.
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