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Published on: May 21, 2019
Copper indium sulfide quantum dots enabling quantitative visible light photoisomerisation of (E)-azobenzene
Zakaria Ziani1, Caterina Bellatreccia1, Filippo Piero Battaglia1
1Department of Chemistry Ciamician, University of Bologna, Via Selmi 2, 40126 Bologna, Italy. marco.villa11@unibo.it.
Abstract:
Azobenzene derivatives have long been studied for their photochromic behaviour. One of the greatest challenges in this field is the quantitative (E) to (Z) photoconversion triggered by visible light irradiation. In this work, the synthesis and characterization of CuInS2 quantum dots (CIS-QDs) appended with azobenzene units are reported: quantitative (E) → (Z) isomerisation is obtained by visible light (e.g., λex = 533 nm). Interestingly, catalytic amounts of CIS-QDs allow the full photoconversion of ungrafted (E)-azobenzene derivatives into the corresponding (Z)-isomers using visible light. This peculiar behaviour is associated with the direct complexation of the (Z)-isomer on the QD surface.
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